ProRadiant Advanced Snow Melt Control - Amazon S3 ? VIEGA NA 1-877-VIEGA-NA 2 PI-17015-11/05 The Viega

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  • One Company... One Partner... Delivering System Solutions.

    Advanced Snow Melt Control

    Installation and Operating Manual

  • VIEGA NA 1-877-VIEGA-NA 2 PI-17015-11/05

    The Viega Advanced Snow Melt Control provides full automatic snow and ice detection in open air spaces such asdriveways, parking areas, ramps, stairs, and flat roofs. The control operates a floating action actuator or a variablespeed injection pump to provide both boiler and slab protection. Viegas Advanced Snow Melt control is equipped with aSnow Melt Sensor which measures the slab temperature, surface temperature and surface moisture level. When thecontrol is not in Melting mode, the system can either be shut down or it can be maintained at an idle temperature forfaster response and improved safety. The control has a Liquid Crystal Display (LCD) to view system status andoperating information.

    Additional functions include:Slab protection for the snow melting system Test sequence to ensure proper component operationBoiler protection Pump excercisingManual override Viscosity compensationWarm Weather Shut Down (WWSD) CSA C US Certified (approved to applicable UL standards)Cold Weather Cut Out (CWCO)

    Advanced Snow Melt Control

    4

    Red

    5

    Blk

    6

    Blu

    7

    Yel

    8

    Brn/SlabMixVar Ret Sup

    9

    Boil

    10

    Com

    11

    tN2

    12

    Mix

    13

    Mix

    14

    Com

    15

    Out

    16

    MeltDemand Pmp 2

    17 18

    System Boiler

    19 22 23 24

    SysP1

    PowerL N

    Test

    Signal wiring must be rated at least 300 V

    not testingtestingtesting

    For maximum heat,press and hold Testbutton for 3 seconds.

    Made in Canada bytekmar Control Systems Ltd.tektra 90009K

    Power 115 V 10% 50/60 Hz 600 VARelays 230 V (AC) 5 A 1/3 hp, pilot duty 240 VAVar. Pump 230 V (AC) 2.4 A 1/6 hp, fuse T2.5 A 250 VDemand 20 to 260 V (AC) 2 VA

    offredred

    Do not apply power20 21

    InputOutdoorSensor

    Included

    InputMelt/IdleDemand

    OutputSystemPump

    OutputSystemPump

    OutputVariable SpeedInjection Pump

    Input115 V(AC)PowerSupply

    158033

    Melt Demand

    WWSD

    CWCO

    Minimum

    Maximum

    Water

    Melting

    Menu Item

    Do not apply power

    OutputBoiler

    1

    Opn/

    2

    Pwr

    3

    Cls

    H20

    29A

    InputUniversalSensor

    Included

    InputUniversalSensor

    Included

    InputUniversalSensor

    Included

    OutputMixing Valve &

    Actuating Motor

    M

    OR

    Advanced Snow Melt Control

    Sensor

    Viega North AmericaAdvanced Snow Melt Control

  • VIEGA NA 1-877-VIEGA-NA 3 PI-17015-11/05

    1 General Operation1.1 Description Of Display 41.2 Quick Setup 51.3 Powering Up The Control 51.4 Mixing Device Selection 5

    2 Snow Melting Operation2.1 Snow Melting Features 62.2 Snow Melting Demands 82.3 General Melting Operation 92.4 General Idling Operation 102.5 View Menu 112.6 Adjust Menu 12

    3 Installation3.1 Mounting And Rough-In 143.2 Sensor Installation 153.3 Electrical Connections 153.4 Output Connections 16

    4 Troubleshooting4.1 Testing The Wiring 184.2 Testing The Sensors 194.3 Testing The Control 204.4 Error Messages 21

    5 Wiring and Piping Diagrams 24

    6 Technical Data 27

    CONTENTS

    Important Note: Proper operation is possible only if the Advanced Snow Melt Control System is installed and activatedbefore there is frost or snow present. Snow melt area must be clean and dry at installation for proper system setup. Werecommended that the system be left in operation during the entire heating season. Your system will work properly onlyif the heat load of the area under control has been calculated properly or the system has been adapted to the localconditions. Please contact your installer or local Viega representative for further information.

  • VIEGA NA 1-877-VIEGA-NA 4 PI-17015-11/05

    1 General Operation

    1.1 Description Of Display

    The Viega Advanced Snow MeltControl uses a Liquid Crystal Display(LCD) as the method of supplyinginformation. You use the LCD in orderto setup and monitor the operation ofyour system. The Viega AdvancedSnow Melt Control has four pushbuttons (Menu, Item, , ) forselecting and adjusting settings. Asyou program your control, record yourAdjust Menu settings for futurereference or troubleshooting.

    MenuAll of the items displayed by thecontrol are organized into variousmenus. These menus are listed onthe left hand side of the display(Menu Field). To select a menu, usethe Menu button. By pressing andreleasing the Menu button, the displaywill advance to the next availablemenu. Once a menu is selected,there will be a group of items that canbe viewed within the menu.

    ItemThe abbreviated name of the selecteditem will be displayed in the item fieldof the display. To view the nextavailable item, press and release theItem button. Once you have reachedthe last available item, pressing andreleasing the Item button will returnthe display to the first item.

    AdjustTo make an adjustment to a setting inthe control, begin by selecting theappropriate menu using the Menubutton. Then select the desired itemusing the Item button. Finally, use the

    and/or button to make theadjustment.

    Additional information can be gainedby observing the Status field andPointers of the LCD. The Status fieldwill indicate which of the controlsoutputs are currently active. Mostsymbols in the status field are onlyvisible when the View Menu isselected.

    Open / CloseDisplays when theactuator is opening orclosing the mixing orinjection valve

    Mixing Device OutputScaleShows output of mixing/injection valve or variablespeed pump. Arrows showwhether the output isincreasing or decreasing.

    BurnerDisplays when the boilerrelay is turned on

    PumpDisplays when the systempumps are operating

    WarningDisplays when an errorexists or when a limit hasbeen reached

    F, C, sec, min, hrUnits of measurement

    PointerDisplays the controloperation as indicatedby the text

    GENERAL OPERATION - CHAPTER 1

  • VIEGA NA 1-877-VIEGA-NA 5 PI-17015-11/05

    Variable Speed Injection Pump(VAR)A standard wet rotor circulator isconnected to the Viega AdvancedSnow Melt Control on the Var and PwrMix terminals (1 and 2). The controlincreases or decreases the poweroutput to the pump based on thesystem requirement. A visualindication of the current variablespeed output is diplayed in the LCD inthe form of a segmented bar graph.

    Mixing Maximum (MIX MAX)The MIX MAX sets the highest fluidtemperature that the control is allowedto calculate as the mixing targettemperature. If the control does targetthe MIX MAX setting, and the MIXSUP temperature is near the MIXMAX, the Maximum pointer isdisplayed in the LCD while the MIXSUP temperature is being viewed.

    Boiler Protection (Boil MIN)Viegas Advanced Snow Melt Controlis capable of providing boilerprotection from cold mixing systemreturn fluid temperatures. If the boilersensor temperature is cooler than theBoil MIN setting while the boiler isfiring, the Viega Advanced Snow MeltControl reduces the output from themixing device. This limits the amountof cool return water to the boiler andallows the boiler temperature torecover. This feature can only beused if the Boil SENS item is set toSUP or RET. The Viega AdvancedSnow Melt Control cannot provideboiler protection if the Boil SENS itemis set to NONE.

    Use the following settings to configureyour Viega Advanced Snow MeltControl for initial snow meltingoperation. For further explanation ofthese settings, or fine-tuning thesettings, see page 11 (Adjust Menu).

    RUN TIME = 4:00 hrADD MELT = 0.30 hrSENSITIVITY = AUTOMelting = 38FIdling = OFFWWSD = AUTOCWCO = 10F (-12C)MIX MAX = 140F (60C)MIXING = FLOTMOTR SPD = 90 sec with Viega Actuator #18018; 140 sec with Viega Actuator # 18019Boil SENS = SUPT Max = 30FDIFF = AUTOBOIL MIN = 140FFIRE DLY = 0.10 minBOIL MASS = MEDEXERCISE = 70 hrUNITS = F

    1.2 Quick Setup

    The Viega Advanced Snow MeltControl is capable of controlling thefluid temperature of a single zonesnow melting system. In order tocontrol a snow melting system, theViega Advanced Snow Melt Controlmust be equipped with the AdvancedSnow Melt Sensor and the outside airsensor. To configure the ViegaAdvanced Snow Melt Control, firstinstall the control and connect thesensors (see chapter 3). When thesystem temperature is controlled by afour way mixing valve and a floatingaction actuator, ensure that theproper settings of the actuator areprogrammed in the Adjust Menu ofthe control. Be aware that Viegaactuators run on 24 Volts which aresupplied from a separate transformer.

    Floating Action (FLOT)A floating action actuator like ViegasThree Position Actuators for MixingValves (#18018, #18019) can beconnected to the Viega AdvancedSnow Melt Control on the Pwr Mix,Opn/Var and CIs terminals (2, 1, and3). The control pulses the actuatormotor open or closed based on thesystem requirements.

    1.4 Mixing Device Selection

    Exercising (Exercise)Viegas Advanced Snow Melt Controlhas a built-in pump and valveexercising function. The exercisingperiod is adjustable and is factory setat 70 hours. If a pump output has notbeen operated at least once duringevery exercising period, the controlturns on the output for 10 seconds.This minimizes the possibility of apump seizing during a long period ofinactivity.

    Mix Target (MIX TRG)The mix target temperature is thesupply fluid temperature calculated bythe control. The control will operatethe snow melt system so that the mixsupply temperature reaches themixing target except while providingboiler return protection for the boiler.

    1.3 Powering Up The Control

    When the Viega Advanced Snow MeltControl is powered up, the controldisplays all LCD segments for 2seconds, then the control typenumber in the LCD for 2 seconds.Next, the software version isdisplayed for 2 seconds. Finally, thecontrol enters into the normaloperating mode and the LCD defaultsto displaying the current outdoor airtemperature.

    GENERAL OPERATION - CHAPTER 1

  • VIEGA NA 1-877-VIEGA-NA 6 PI-17015-11/05

    2 Snow Melting Operation

    2.1 Snow Melting Features

    Slab Protection (T MAX)The control can limit the rate at whichheat is applied to the zone throughthe T MAX setting. The T is thetemperature difference between thesnow melting supply temperature andthe snow melting return temperature.By limiting this temperaturedifference, the rate at which heat isapplied to the zone can be controlledand thermal stresses in the slab canbe minimized. When the control isoperating at the T MAX, theMaximum pointer can be seen whenviewing the T item in the Viewmenu. The control provides slabprotection differently based on theboiler sensor placement.

    Viscosity Compensation(Exceeding T MAX)At low temperatures, the glycolsolutions used in snow meltingsystems become very viscous anddifficult to pump. In order to overcomethis condition during a cold start of asnow melting system, the ViegaAdvanced Snow Melt Control isallowed to exceed the T MAXsetting for a period of time in order towarm the glycol solution. This allowsthe control to compensate for the highviscosity of the glycol solution and isused when mixing return temperatureis below 30F . When the controlexceeds the T MAX setting, theMaximum pointer will flash whenviewing the T item in the VIEWmenu.

    Running Time (RUN TIME)The running time is the length of timethat the system operates once it hasreached its slab target temperature.During the time that the system isapproaching its slab target

    Soft StartWhen the control starts applying heatto the slab, the supply temperature tothe snow melting system is rampedup over a period of time until itreaches the target mixed supplytemperature. This feature helpsreduce thermal stresses in the slab.Note: This operation only occurs if theBoil SENS item is set to RET orNONE.

    Note: The run time is only applicablewhen a manual melting enable signalstarts the snow melting system.

    Warm Weather Shut Down (WWSD)The control has a warm weather shutdown that prevents the control fromentering the melt or idle modes inorder to conserve energy. WarmWeather Shut Down is displayed inthe STATUS item in the VIEW menuand the WWSD pointer is on thedisplay.

    Automatic (AUTO)When the WWSD is set to AUTO, theWWSD occurs when the slabtemperature and the outdoortemperature exceed the MELTINGsetting by 2F. The control exits theWWSD when the slab or outdoortemperature falls to theMELTING setting temperature.

    Ajustable WWSD (WWSD)When the WWSD is set to atemperature, the WWSD occurs whenthe outdoor air temperature exceedsthe WWSD setting by 1F or if theslab temperature falls below 34F(1C). The control exits WWSD whenthe temperature falls 1F (0.5C)below the WWSD setting. This allowsthe MELTING temperature setting tobe set higher than the WWSD. This is

    Cold Weather Cut Out (CWCO)Maintaining the system at either themelting or idling temperature duringextremely cold temperatures can beexpensive or impossible. The controlturns the snow melting system offwhen the outdoor air temperaturedrops below the Cold Weather CutOut (CWCO) temperature. While thecontrol is in CWCO, the word CWCOis displayed in the STATUS item inthe VIEW menu and the CWCOpointer is on in the display. Theheater in the sensor is kept on duringCWCO until the control detectsmoisture. If water is detected, theheater is turned off but the controlretains the moisture detectedinformation. When the outdoortemperature rises above the CWCOtemperature, the control exits CWCOand if the Snow Melt Sensor detectedmoisture during CWCO, the controlinitiates melting mode. If the controlhas been started prior to the CWCO,it resumes the melting mode once theoutdoor air temperature rises abovethe CWCO temperature.

    temperature, the run time does notdecrease. Once the system reachesits slab target temperature, the runtime begins counting down. When therun time reaches 0:00 as displayed inthe STATUS item in the VIEW menu,the system has finished melting.

    useful where high slab temperaturesare required to melt the snow or ice. Agood example of this is installationsusing paving bricks on top of sandand concrete layers.

    SNOW MELTING OPERATION - CHAPTER 2

    STATUSWhile in the VIEW menu there are anumber of items available todetermine the current status of thesystem. To view the currentstatus of the system, select theSTATUS item in the VIEW menu.

  • VIEGA NA 1-877-VIEGA-NA 7 PI-17015-11/05

    Boiler Mass (BOIL MASS)The BOIL MASS setting allows theViega Advanced Snow Melt Control toadjust to different types of heatsources depending on their thermalmass.

    Light (LITE)The LITE setting is selected if theboiler that is used has a low thermalmass. This means that the boiler hasa very small water content and hasvery little metal in the heat exchanger.A boiler that has a low thermal masscomes up to temperature quite rapidlywhen fired. This is typical of manycopper fin-tube boilers.

    Medium (MED)The MED setting is selected if theboiler that is used has a mediumthermal mass. This means that theboiler either has a large water contentand a low metal content or a lowwater content and a high metalcontent. This is typical of manymodern residential cast iron boilers orsteel tube boilers.

    STRT (START)The word STRT is displayed after thesnow melting system has beenmanually enabled. It is displayed untilthe system reaches its slab targettemperature. If the system is at itsslab target temperature, STRT isdisplayed for 5 seconds after thesnow melting system has startedoperation. This is to verify that thecontrol has entered into the meltingmode.

    STOPThe word STOP is displayed for 5seconds after the snow meltingsystem has been manually disabled.

    IDLEThe word IDLE is displayed as longas the system is operating at itsidling temperature.

    EXT (EXTERNAL)The word EXT is displayed when theRUN TIME has reached 0:00 and thecontrol still has an external meltdemand. In this situation, the systemcontinues melting until the meltdemand is removed or the controlis stopped.

    DET (DETECT)The word DET is displayed after thesnow melting system has beenautomatically enabled by theAdvanced Snow Melt Control Sensorand the system is at its slab targettemperature. DET is also displayedonce the control is manually enabledafter automatic detection by the SnowMelt Sensor and the running time hascounted down to 0:00.

    0:00 to 23:59 hrWhile the system is up totemperature and melting, theremaining RUN TIME is displayed.

    INF (INFINITE)If an infinite RUN TIME is selectedand the system is melting, INF isdisplayed.

    WWSDWhen a system is in Warm WeatherShut Down, WWSD is displayed.

    CWCOWhen the control is in Cold WeatherCut Out, CWCO is displayed.

    System Pump Operation(Sys P1 and System Pmp 2)The system pump contacts close andremain closed as long as the systemis either in the Melting or Idling mode.The system pump contacts shut off ifthe control is in CWCO, WWSD, or ifthere is no call for Melting or Idling.

    PURGEThe system pumps continue tooperate for up to 2 minutes after thelast demand is removed. This purgesthe residual heat from the boiler intothe snow melting slab. If the boilertemperature drops below the Boil MINsetting after 20 seconds, the purge isaborted and the system pumps areturned off.

    Boiler Sensor On The Supply(BOIL SENS=SUP)When operating a boiler that isdedicated to a snow melting system,the Viega Advanced Snow MeltControl is designed to operate theboiler as efficiently as possible. Theboiler is cycled based on the mixingsupply fluid temperature. This is toprovide longer and more efficientboiler cycles. This mode of operationonly works if the Boil SENS item isset to SUP.

    Boiler Minimum (Boil MIN)The Boil MIN is the lowest watertemperature that the control isallowed to use as a boiler targettemperature. If the boiler isoperating, and the boiler supplytemperature is near the Boil MIN

    Fire Delay (FIRE DLY)The FIRE DLY is the delay time thatmay occur between the time thatthe control closes the boiler contactand when the burner fires. Thisdelay is usually the result of burnerpre-purge or other forms of timedelay built into the burners safetycircuits.

    M i n i m u m

    Off Time

    SNOW MELTING OPERATION - CHAPTER 2

    setting, the Minimum pointer turns onin the LCD while the Boil SUPtemperature is being viewed. If theinstalled boiler is designed forcondensing or low temperatureoperation, set the Boil MINadjustment to OFF.

  • VIEGA NA 1-877-VIEGA-NA 8 PI-17015-11/05

    Snow Melting EnableThe snow melting system can beenabled manually or automatically. A

    Manual Melting EnableA manual melting enable signalrequires the user to manually startthe snow melting system and can beprovided from an external meltdemand.

    External Melt DemandThe snow melting system is enabledwhen a voltage between 24 and 230V(AC) is applied across the MeltDemand terminals (16 and 17). Anexternal melt demand must bepresent for at least 4 seconds inorder to start the snow meltingsystem. If the RUN TIME reaches0:00 and the external melt demand isstill present, the control continuesmelting until the external meltdemand is removed or the system isotherwise stopped.

    2.2 Snow Melting Demands

    Heavy (HEVY)The HEVY setting is selected if theboiler that is used has a high thermalmass. This means that the boiler hasboth a large water content and a largemetal content. A boiler that has a highthermal mass is relatively slow incoming up to temperature. This istypical of many commercial cast ironand steel tube boilers.

    Differential (DIFF)An on/off heat source such as aboiler must be operated with adifferential in order to prevent shortcycling. With the Viega AdvancedSnow Melt Control either a fixed or anautomatic differential may beselected.

    Fixed DifferentialThe differential is centered around thetarget temperature. If the temperaturedrops the differential below thetarget temperature, the ViegaAdvanced Snow Melt Control closesthe boiler contact to fire the boiler. Ifthe temperature rises of thedifferential above the targettemperature, the control opens theboiler contact to turn off the boiler.

    Auto Differential (AUTO)If the AUTO differential is selected,the Viega Advanced Snow MeltControl automatically adjusts thedifferential setting under the currentload conditions to avoid shortcycling.

    No Boiler Sensor(BOIL SENS = NONE)The Viega Advanced Snow MeltControl is capable of operatingwithout a Boiler Sensor if desired.Without a Boiler Sensor, the ViegaAdvanced Snow Melt Control isunable to provide boiler protection. Inthis mode of operation, the boilercontact is used to provide a boilerenable. When the mixing devicebegins to ramp up, the boiler contacton the Viega Advanced Snow MeltControl closes. The boiler contactremains closed until the mixingdevice no longer requires heat. Thistype of application is typical if theAdvanced Snow Melt Control isdrawing heat from a source thatalready incorporates some form ofboiler protection.

    SNOW MELTING OPERATION - CHAPTER 2

    Boiler Sensor On The Return(BOIL SENS = RET)The boiler sensor should be locatedon the boiler return if the ViegaAdvanced Snow Melt Control is oneof many controls that can call forboiler operation. When in the return

    mode, the control provides a boilerenable through the boiler contact. Thecontrol no longer tries to control theboiler supply water temperaturedirectly, but allows the boiler tooperate at its operating aquastatsetting when required. When themixing device begins to ramp up, theboiler contact closes on the control.The boiler contact remains closeduntil the mixing device no longerrequires heat. With the sensor on theboiler return, the Advanced SnowMelt Control is still capable ofproviding boiler protection.

    melting enable signal applied to thecontrol places the system into themelting mode. If a melting enablesignal is applied once the system isalready in the melting mode, thecontrol responds to the last commandreceived.

    Automatic Melting Enable(Snow Melting Sensor)The Viega Advanced Snow MeltControl can use the Snow MeltingSensor to provide an automaticmelting enable signal to start thesnow melting system. The controlcontinually monitors the sensor forthe presence of moisture. Oncemoisture is detected, the Waterpointer is displayed in the LCD andthe snow melting system is enabled.

    16 17Melt

    Demand

    24 to 230 V(AC)

    N

    L

  • VIEGA NA 1-877-VIEGA-NA 9 PI-17015-11/05

    Water Detection Sensitivity(SENSTVTY)The Viega Advanced Snow MeltControl has a sensitivity setting whichcompensates for varying outdoorconditions which could affect how themoisture detector in the sensorinterprets the presence of moisture.This adjustable setting is availablethrough the SENSTVTY item in theADJUST menu of the control. Assnow becomes contaminated withdirt, and as the sensor itselfbecomes dirty, the control mayincorrectly indicate the presence ofwater. If this condition occurs, cleanthe surface of the sensor and/or turndown the SENSTVTY setting. If thesnow in your area is very clean, theSENSTVTY setting may need to beincreased before snow is detected. IfAUTO is selected, the controlautomatically adjusts the sensitivitylevel used to detect moisture.

    Snow Melting DisableThe snow melting system can bedisabled manually or automatically. Amelting disable signal applied to thecontrol takes the system out ofmelting mode. Once the snow meltingsystem is disabled, the systemoperates in the idling mode. The idlingmode allows the system to beoperated either at a lower temperatureor turned off.

    Automatic Melting DisableOnce the Viega Advanced Snow MeltSensor is dry, the Water pointer turnsoff in the LCD. The system slabtemperature has to be at least theslab target temperature for aminimum of thirty minutes in order forthe system to turn off. If a manual

    SNOW MELTING - CHAPTER 2

    2.3 General Melting Operation

    In order for the snow melting systemto be started, one of the methodsdescribed in chapter 2.2 must beused. Once a melting enablesignal is applied and the system isnot in WWSD or CWCO, the meltingmode begins. When the control is inthe melting mode, the Melting pointeris visible in the VIEW menu. TheMELT setting in the ADJUST menusets the slab surface temperature.When the system is melting and theslab temperature is warming up to theslab target temperature, STRT isdisplayed in the STATUS item whilein the VIEW menu. The systemfinishes melting when the slabtemperature has been at least theslab target temperature for a periodof time. This period of time is basedon whether an automatic or manualmelting enable signal starts the snowmelting system. If an automaticmelting enable signal starts the snowmelting system and the slabtemperature reaches the slab targettemperature, DET is displayed in theSTATUS item while in the VIEWmenu. The system continues to meltuntil the Snow Melting Sensorbecomes dry and additional runningtime has expired. Once the meltingmode is complete, the systemoperates in the idling mode. If amanual melting enable signal startsthe snow melting system, the runningtime is displayed in the STATUS itemwhile in the VIEW menu and beginscounting down once the slabtemperature reaches the slab targettemperature. The system continues tomelt until the running time countsdown to 0:00 and there is no externalmelt demand. Once the melting modeis complete, the system operates inthe idling mode.

    Slab Temperature ControlThe Viega Advanced Snow Melt

    Control uses the Advanced SnowMelt Control Sensor to provide slabcontrol.

    Advanced Snow Melt ControlSensorThe Advanced Snow Melt ControlSensor is displayed as Slab in theVIEW menu.This temperature iscalculated from the edge and centersensors built into the Snow MeltSensor.

    Slab Target Temperature(SLB TRG)The SLAB TRG temperature isdetermined from the MELTINGsetting, idle setting and the outdoorair temperature. The controldisplays the temperature that it iscurrently trying to maintain at theslab sensor. If the control does notpresently have a requirementfor heat, it displays in theSTATUS item while in the VIEWmenu.

    Additional Melting Time(ADD MELT)In cases where areas of the snowmelting system havent completelymelted after the melting mode hasfinished and the Snow Melt Sensor isdry, the Viega Advanced Snow MeltControl has a function in whichadditional time can be added to meltthe zone. This is an adjustable timethrough the ADD MELT item in theADJUST menu of the control. TheADD MELT time is calculated into arunning time and is displayed in theSTATUS item while in the VIEWmenu. Once the Advanced SnowMelt Sensor becomes dry and theslab temperature is at least the slabtarget temperature, the running timestarts counting down.

    melting disable signal is applied thesnow melting system turns offimmediately.

  • VIEGA NA 1-877-VIEGA-NA 10 PI-17015-11/05

    2.4 General Idling Operation

    When the snow melting systemstarts from a cold temperature, thetime required for the system to reachthe melting temperature may beexcessive. To decrease this start uptime, the Advanced Snow MeltControl has an idling featurewhich can maintain the system at alower temperature. This feature isalso useful for preventing frost andlight ice formation. The IDLINGsetting in the ADJUST menu sets theslab surface temperature while thecontrol is in the idling mode. When inthe idling mode, IDLING is displayedin the STATUS item while in the VIEWmenu. If idling is not desirable, theIDLING setting may be set to OFF.

    SNOW MELTING - CHAPTER 2

  • VIEGA NA 1-877-VIEGA-NA 11 PI-17015-11/05

    Delta T - Current mixed T difference between themixed supply sensor and the mixed return sensor.

    T Max = OFF

    DescriptionItem Field

    Pag

    e Range

    Outdoor - Current outdoor air temperature as measuredby the outdoor sensor.

    -67 to 149F(-55 to 65C)

    Slab Target - Slab sensor target temperature.

    Slab - Current slab temperature.

    Status - Operating status.

    Mix Target - The current mix target temperature ascalculated by the control.

    Mix Supply - Current mixed supply water temperatureas measured by the mixing supply sensor.

    Mix Return - Current mixed return water temperature asmeasured by the mixing return sensor.

    Mix Ret Sensor present

    Boil Supply - Current boiler supply water temperatureas measured by the boiler sensor.

    Boil SENS = SUP

    Boil Return - Current boiler return water temperature asmeasured by the boiler sensor.

    Boil SENS = RET

    , -58 to 167F( , 50 to 75C)

    -58 to 167F(-50 to 75C)

    Status Operating status.STRT, STOP, IDLE, EXT,0:00 to 23:59 hr, ,INF, WWSD, CWCO, DET

    , -25 to 248F( , -32 to 120C)

    -31 to 266F(-35 to 130C)

    -85 to 170F(-65 to 75C)

    -58 to 167F(-50 to 75C)

    -31 to 266F(-35 to 130C)

    -31 to 266F(-35 to 130C)

    SNOW MELTING - CHAPTER 2

    2.5 View Menu

    8

    8

    5

    4

    4

    4

    5

    7

    7

  • VIEGA NA 1-877-VIEGA-NA 12 PI-17015-11/05

    DescriptionItem Field

    Pag

    e Range

    Run Time - The time for which the zone is operatedonce it has reached its melting temperature.

    0:30 to 17:00 hr,INF (Infinity)Default = 4:00 hr

    Add Melt - The additional time for which the zone isoperated once the Snow Melting Sensor becomes dry.

    Advanced Snow Melt Sensor present

    Sensitivity - Sensitivity of water detection of theAdvanced Snow Melt Sensor.

    Advanced Snow Melt Sensor present

    Melting - The desired slab surface temperature while inthe Melting Mode.

    Idling - The desired slab surface temperature while inthe Idling Mode.

    WWSD Warm Weather Shut Down.Slab must exceed 34F (1F) to enter WWSD

    Cold Weather Cut Out - The Cold Weather Cut Outtemperature for the snow melting system.

    Mix Max - The maximum supply water temperature forthe mixing system.

    Mixing - The type of mixing device that is to be used.

    Motor Speed - The time the actuating motor requires tooperate from fully open. Set to 70 sec. for #18003actuator, 90 sec for #18018, 140 sec for #18019.MIXING = FLOT

    0:00 to 6:00 hrDefault = 0:30 hr

    Auto, 20 to 80 %Default = Auto

    OFF, 20 to 95F(OFF, -7 to 35 C)Default = OFF

    Auto, 32 to 95F(Auto,0 to 35C)Default = Auto

    80 to 210F, OFF(27 to 99C, OFF)Default: 140F (60C)

    30 to 50F(-34 to 10C)Default = 10F (-12C)

    FLOT (Floating)VAR (Variable speed),Default = VAR

    30 to 230 secondsDefault = 150 seconds

    Boil Sensor - The location of the boiler sensor, thisaffects operation of the Boiler contact.

    32 to 95F(0 to 35C)Default = 36F (2C)

    SUP, RET, NONEDefault = SUP

    SNOW MELTING - CHAPTER 2

    5

    8

    8

    7

    6

    5

    5

    4

    4

    4

    7

    2.6 Adjust Menu (1 of 2)

  • VIEGA NA 1-877-VIEGA-NA 13 PI-17015-11/05

    DescriptionItem Field

    Pag

    e Range

    Delta T Maximum - The maximum T for the snowmelting system. Set according to the design drop foryour snow melt system (usually 30F).

    10 to 70F, OFF(6 to 39C, OFF)Default = OFF

    Differential - The differential for the snow melting system.

    Boil SENS = SUP

    Fire Delay - The time delay the control can expectbetween the time the Boiler contact closes and the boilerfires.Boil SENS = SUP

    Exercise - The frequency with which the controlexercises the pumps and valves that are operated bythe control.

    Units - The units of measure that all of the temperaturesare to be displayed in by the control.

    Auto, 2 to 42F(Auto, 1 to 23C)Default = Auto

    OFF, 80 to 180F(OFF, 27 to 82C)Default = 140F (60C)

    0:00 to 3:00 minutesDefault = 0:10 min

    30 to 240 hours,(in 10 hour steps)Default = 70 hr

    F, CDefault = F

    SNOW MELTING - CHAPTER 2

    2.6 Adjust Menu (2 of 2)

    5

    7

    6

    6

    4

    Boil Minimum - The minimum temperature allowed forthe boiler target temperature.

    Boil SENS = NONE

  • VIEGA NA 1-877-VIEGA-NA 14 PI-17015-11/05

    3 Installation

    CAUTIONImproper installation and operation ofthis control could result in damage tothe equipment and possibly evenpersonal injury. It is yourresponsibility to ensure that thiscontrol is safely installed according toall applicable codes and standards.This electronic control is not intendedfor use as a primary limit control.Other controls that are intended andcertified as safety limits must beplaced into the control circuit.

    3.1 Mounting And Rough-In

    Check the contents of this package.If any of the contents listed aremissing or damaged, please contactyour wholesaler or salesrepresentative for assistance.

    The Viega Advanced Snow MeltControl includes:(1) Advanced Snow Melt Control Unit(1) Outdoor Sensor(3) Universal Sensors(1) Advanced Snow Melt ControlSensor(1) Advanced Snow Melt ControlSensor Housing

    MountingRemove the control from its base bypressing down on the release clip inthe wiring chamber and sliding thecontrol upwards. The base may thenbe mounted by screwing it to a wall ormounting board (screws not included).

    Rough-InAll electrical wiring terminates in thecontrol base wiring chamber. Thebase has standard 7/8 (22mm)knockouts which accept commonwiring hardware and conduit fittings.Before removing the knockouts,check the wiring diagram and selectthose sections of the chamber withcommon voltages. Do not allow thewiring to cross between sections asthe wires will interfere with safetydividers which should be installed at alater time.

    Power must not be applied to any ofthe wires during the rough-in wiringstage. Install the Outdoor Sensor andthe three universal sensors accordingto the instructions on page 14 and runthe wiring back to the control. Run wire from other systemcomponents (pump, boiler, actuatingmotor, etc.) to the control. Run wires from the 120 V(AC)power to the control. Use a cleanpower source to ensure properoperation. Multi-strand 16 AWG wireis recommended for all 120 V(AC)wiring due to its superior flexibility andease of installation into the terminals.

    Press down at grips on top of cover, thenpull out and down to release cover.

    Loosen screws at frontand pull wiring cover straight out.

    Remove safety dividers by pulling themstraight out.

    Press release clip on base and slide controlupward.

    The control lifts up and away from the base,which is ready for mounting.

    Wiring can enter from bottom or back ofenclosure. Knock-outs allow wiring to be runin conduit.

    INSTALLATION - CHAPTER 3

    Mounting holes

    Releaseclip

    Conduit knock-outs on back and bottom

  • VIEGA NA 1-877-VIEGA-NA 15 PI-17015-11/05

    3.3 Electrical Connections

    The installer should test to confirmthat no voltage is present at any ofthe wires. Push the control into thebase and slide it down until it snapsfirmly into place.

    Powered Input Connections115V(AC) PowerConnect the 115 V(AC) power supplyto the Power L and Power N terminals(23 and 24). This connection providespower to the microprocessor anddisplay of the control. As well, thisconnection provides power to the SysP1 terminal (22) from the Power Lterminal (23).

    Installing System SensorsNote: These universal sensors aredesigned to mount on a pipe or in atemperature immersion well.

    The sensor can be strapped directlyto the pipe using a plastic cable tie.Insulation should be placed aroundthe sensor to reduce the effect of aircurrents on the sensor measurement.

    Where applicable, the senor should beplaced downstream of a pump or afteran elbow or similar fitting. This isespecially important if large diameterpipes are used, as the thermalstratification within the pipe can result

    in erroneous sensor readings. Propersensor location requires that the fluidis thoroughly mixed within the pipebefore it reaches the sensor.

    Connect 18 AWG or similar wire to thetwo wires of the sensor and then tothe control. Do not run the wiresparallel to telephone or power cables.If the sensor wires are located in anarea with strong sources of electro-magnetic interference (EMI), shieldedcable or twisted pair should be usedor the wires can be run in a groundedmetal conduit. If using shieldedcable, the shield wire should beconnected to the COM sensorterminal on the control and not toearth ground.

    INSTALLATION - CHAPTER 3

    3.2 Sensor Installation

    The Outdoor Sensor includes a 10kthermistor which provides an accuratemeasurement of the outdoor tempera-ture. The sensor is protected by awhite U.V. resistant plastic enclosure.

    Remove the screw and pull the frontcover off of the sensor enclosure.

    The Outdoor Sensor can either bemounted directly onto a wall or a2 x 4 electrical box. When thesensor is wall mounted, the wiringshould enter through the back orbottom of the enclosure. Do notmount the sensor with the conduitknockout facing upwards as raincould enter the enclosure and damagethe sensor.

    In order to prevent heat transmittedthrough the wall from affecting thesensor reading, it may be necessaryto install an insulating barrier behindthe enclosure.

    The Outdoor Sensor should bemounted on a wall which best repre-sents the heat load on the building (anorthern wall for most buildings, and asouthern facing wall for buildings withlarge south facing glass areas). Thesensor should not be exposed to heatsources such as ventilation or windowopenings.

    The Outdoor Sensor should beinstalled at an elevation above theground that will prevent accidentaldamage or tampering, and where itwill not be covered by drifting snowduring the winter. Connect 18 AWG orsimilar wire to the two terminals

    provided in the enclosure and run thewires from the sensor to the control.Do not run the wires parallel totelephone or power cables. If thesensor wires are located in an areawith strong sources of electromag-netic interference (EMI), shieldedcable or twisted pair should be usedor the wires can be run in a groundedmetal conduit. If using shieldedcable, the shield wire should beconnected to the COM sensorterminal on the control and not toearth ground.

    115 V(AC)

    L

    N

    PowerL N

    23 24

  • VIEGA NA 1-877-VIEGA-NA 16 PI-17015-11/05

    System Pump Contact (Sys P1)The Sys P1 output terminal (22) onthe Viega Advanced Snow MeltControl is a powered output. When therelay in the Viega Advanced SnowMelt Control closes, 115 V(AC) isprovided to the Sys P1 terminal (22)from the Power L terminal (23). Tooperate the system pump, connectone side of the system pump circuitto terminal 22 and the second side ofthe pump circuit to the Neutral (N)side of the 115 V(AC) power supply.

    System Pump Contact(System Pmp 2)The System Pmp 2 terminals (18 and19) are an isolated output in the ViegaAdvanced Snow Melt Control. Thereis no power available on theseterminals from the control. If theSystem Pmp 2 contact is used,connect the pump circuit to theSystem Pmp 2 terminals (18 and 19).

    Melt DemandTo generate a melt demand, a voltagebetween 24V(AC) and 230 V(AC)must be applied across the MeltDemand terminals (16 and 17)

    Mixing Valve ActuatorIf a mixing valve is used, connectone side of the 24 V(AC) power tothe Pwr Mix terminal (2) on thecontrol. The output relay Opn / Var (1)is then connected to the openterminal of the actuating motor andthe output relay Cls (3) is connectedto the close terminal of th actuatingmotor. Connect the second side ofthe 24 V(AC) circuit to the commonterminal of the actuating motor.

    3.4 Output Connections

    Boiler ContactsThe Boiler terminals (20 and 21) arean isolated output in the ViegaAdvanced Snow Melt Control. Thereis no power available on theseterminals from the control. Theseterminals are used as a switch toeither make or break the boiler circuit.When the Viega Advanced Snow MeltControl requires the boiler to fire, itcloses the contact between terminals20 and 21.

    Variable Speed Injection PumpThe Viega Advanced Snow MeltControl can vary the speed of apermanent capacitor, impedanceprotected or equivalent pump motorthat has a locked rotor current of lessthan 2.4 A. Most small wet rotorcirculators are suitable. The ViegaAdvanced Snow Melt Control has aninternal overload fuse which is ratedat 2.5 A 250 V(AC). Contact yourViega sales representative for detailson the repair procedures if the fuse isblown. If a variable speed injectionpump is used, connect one of thewires from the variable speedinjection pump to the Opn/Varterminal (1) on the Viega AdvancedSnow Melt Control. Connect the PwrMix terminal (2) to the live (L) side ofthe 115 V(AC) power source. Theother wire on the variable speedinjection pump must be connected tothe neutral (N) side of the 115 V(AC)power supply.

    Note: Sensor and Unpowered InputConnections (Do not apply power to theseterminals as this will damage the control).

    INSTALLATION - CHAPTER 3

    Outdoor SensorConnect the two wires from theOutdoor Sensor to the Com and Outterminals (14 and 15). The outdoorsensor is used by the ViegaAdvanced Snow Melt Control tomeasure the outdoor air temperature.

    Mixing Return SensorConnect the two wires from the MixReturn Sensor to the Com and MixRet terminals (12 and 14). The mixingreturn sensor is used by the ViegaAdvanced Snow Melt Control tomeasure the fluid return temperaturefrom the snow melting slab.

    16 17Melt

    Demand

    24 to 230 V(AC)

    N

    L

    SysP1

    115 V(AC)

    NL

    Power24

    L N

    2322

    PwrMix

    Opn/Var

    115 V(AC)

    N

    L

    1 2Opn/Var

    PwrMix

    Cls

    24 to 230 V(AC)

    RC

    1 2 3

    Com Out14 15

  • VIEGA NA 1-877-VIEGA-NA 17 PI-17015-11/05

    Mixing Supply SensorConnect the two wires from the MixSupply Sensor to the Mix Sup andCom terminals (13 and 14). Themixing supply sensor is used by theViega Advanced Snow Melt Control tomeasure the fluid supply temperatureafter the mixing device. Normally, thesensor is attached downstream of themixing pump.

    Test The Power Inputs MeltIf a Melt demand is used, measurethe voltage between the MeltDemand terminals (16 and 17). Whenthe melting or idling device calls forheat, you should measure between20 and 260 V(AC) at the terminals.When the melting or idling device isoff, you should measure less than5 V(AC).

    Test The Power SupplyMake sure exposed wires and bareterminals are not in contact with otherwires or grounded surfaces. Turn onthe power and measure the voltagebetween the Power L and Power Nterminals (23 and 24) using an ACvoltmeter, the reading should bebetween 103.5 and 126.5 V(AC).

    Test The OutputsSystem Pump (System Pmp 2)If a pump is connected to the SystemPmp 2 terminals (18 and 19), makesure power to the pump circuit is offand install a jumper between theSystem Pmp 2 terminals (18 and 19).When the circuit is powered up, thepump should turn on. If no responseoccurs, check the wiring between theterminal and the pump and refer toany installation or troubleshooting

    Snow Melting SensorConnect the red wire from the sensorcable to the Red terminal (4), connectthe black wire from the sensor cableto the Blk terminal (5), connect theblue wire from the sensor cable to theBlu terminal (6), connect the yellowwire from the sensor cable to the Yelterminal (7) and connect the brownwire from the sensor cable to theBrn / Slab terminal (8). The SnowMelt Sensor is used by the ViegaAdvanced Snow Melt Control tomeasure the slab surfacetemperature. This sensor must beinstalled flush with the slab surfaceand way between the heatingpipes. See separate manual forinstallation instructions regarding theSnow Melt Sensor and Snow MeltSensor Housing.

    Test The OutputsSystem Pump (Sys P1)If a system pump is connected to theSys P1 terminal (22), make sure thatpower to the terminal block is off andinstall a jumper between the Sys P1and Power L terminals (22 and 23).When power is applied to the Power Land Power N terminals (23 and 24),the system pump should start. If thepump does not turn on, check thewiring between the terminal block andpump and refer to any installation ortroubleshooting information suppliedwith the pump. If the pump operatesproperly, disconnect the power andremove the jumper.

    INSTALLATION - CHAPTER 3

    information supplied with the pump. Ifthe pump operates properl disconnectthe power and remove the jumper.

    BoilerIf the boiler circuit is connected tothe Boiler terminals (20 and 21),make sure power to the boiler circuitis off, and install a jumper betweenthe terminals. When the boiler circuitis powered up, the boiler should fire.If the boiler does not turn on, refer toany installation or troubleshootinginformation supplied with the boiler.(The boiler may have a flow switchthat prevents firing until the boilerpump is running). If the boileroperates properly, disconnect thepower and remove the jumper.

    20 to 260 V(AC)Melt

    Demand16 17

    22 23 24SysP1

    PowerNL

    115 V(AC)N

    L

    MixSup

    Com

    Mix SupplySensor

    SystemPump

    13 14

  • VIEGA NA 1-877-VIEGA-NA 18 PI-17015-11/05

    Test The OutputsSystem Pump (System Pmp 2)If a pump is connected to the SystemPmp 2 terminals (18 and 19), makesure power to the pump circuit is offand install a jumper between theSystem Pmp 2 terminals (18 and 19).When the circuit is powered up, thepump should turn on. If no responseoccurs, check the wiring between theterminal and the pump and refer toany installation or troubleshootinginformation supplied with the pump. Ifthe pump operates properlydisconnect the power and remove thejumper.

    BoilerIf the boiler circuit is connected tothe Boiler terminals (20 and 21),make sure power to the boiler circuitis off, and install a jumper betweenthe terminals. When the boiler circuitis powered up, the boiler should fire.If the boiler does not turn on, refer toany installation or troubleshootinginformation supplied with the boiler.(The boiler may have a flow switchthat prevents firing until the boiler

    Variable Speed Injection PumpIf a variable speed injection pumpcircuit is connected to the Opn/Varand Pwr Mix terminals (1 and 2),make sure the power to the terminalblock is off and install a jumperbetween the Opn/Var and Pwr Mixterminals (1 and 2). When the variablespeed pump circuit is powered up,the variable speed pump shouldoperate at full speed. If the pumpdoes not operate, check the wiringbetween the terminal block and thepump and refer to any installation ortroubleshooting information suppliedwith the pump. If the pump operatesproperly, disconnect the power andremove the jumper.

    Mixing Valve ActuatorIf a floating action actuating motorcircuit is connected to the Pwr Mix,Opn/Var and Cls terminals (2, 1 and3), make sure power to the motorcircuit is off and install a jumperbetween the Pwr Mix and Opn/Varterminals (2 and 1). When the circuitis powered up, the actuator shouldmove in the opening direction. If itdoes not, check the wiring betweenthe terminals and the actuating motor.Refer to any installation or trouble-shooting information supplied with themotor. If the motor closes instead ofopening, the wiring of the actuatingmotor must be reversed. If the valveopens correctly, turn off the power tothe circuit and remove the jumper.Install a jumper between the Pwr Mixand Cls terminals (2 and 3). When thecircuit is powered up, the actuatorshould move in the closing direction.If it does not, check the wiringbetween the terminals and theactuating motor. Refer to anyinstallation or troubleshootinginformation supplied with the motor. Ifthe motor closes correctly, turn offthe power to the circuit and removethe jumper.

    Test The Power Inputs MeltIf a Melt demand is used, measurethe voltage between the MeltDemand terminals (16 and 17). Whenthe melting or idling device calls forheat, you should measure between20 and 260 V(AC) at the terminals.When the melting or idling device isoff, you should measure less than 5V(AC).

    Test The Power SupplyMake sure exposed wires and bareterminals are not in contact withother wires or grounded surfaces. Turnon the power and measure thevoltage between the Power L andPower N terminals (23 and 24) usingan AC voltmeter, the reading shouldbe between 103.5 and 126.5 V(AC).

    4 Troubleshooting

    4.1 Testing The Wiring

    Each terminal block must beunplugged from its header on thecontrol before power is applied fortesting. To remove the terminal block,pull straight down from thecontrol.The following tests are to beperformed using standard testingpractices and procedures and shouldonly be carried out by properly trainedand experienced persons. A goodquality electrical test meter, capableof reading from at least 0 300 V(AC)and at least 0 2,000,000 W, isessential to properly test the wiringand sensors.

    TROUBLESHOOTING - CHAPTER 4

    Test The OutputsSystem Pump (Sys P1)If a system pump is connected to theSys P1 terminal (22), make sure thatpower to the terminal block is off andinstall a jumper between the Sys P1and Power L terminals (22 and 23).When power is applied to the Power Land Power N terminals (23 and 24),the system pump should start. If thepump does not turn on, check thewiring between the terminal block andpump and refer to any installation ortroubleshooting information suppliedwith the pump. If the pump operatesproperly, disconnect the power andremove the jumper.

    pump is running). If the boileroperates properly, disconnect thepower and remove the jumper.

    22 23 24SysP1

    PowerNL

    115 V(AC)N

    L

    20 to 260 VMelt

    16 17

    ComBoil9 10

  • VIEGA NA 1-877-VIEGA-NA 19 PI-17015-11/05

    4.3 Testing The Control

    The Viega Advanced Snow MeltControl has a built-in test routinewhichis used to test the main controlfunctions. The control continuallymonitors the sensors and displays anerror message whenever a fault isfound. See the following pages for alist of the controls error messagesand possible causes. When the Testbutton is pressed, the test light isturned on. The individual outputs andrelays are tested in the following testsequence.

    Test SequenceEach step in the test sequence lasts10 seconds. During the test routine,the test sequence is paused bypressing the Test button. Whilepaused, the control displays thetesting step as well as the wordPAUS. If the Test button is notpressed again for 5 minutes while thetest sequence is paused, the controlexits the entire test routine. If the testsequence is paused, the Test buttoncan be pressed again to advance tothe next step. This can also be usedto rapidly advance through the testsequence. To reach the desired step,repeatedly press and release the Testbutton until the appropriate deviceand segment in the display turn on.

    Step 1If FLOT is selected in the Mixingitem, the mixing valve is run fullyopen in the time set by the Motr Spditem. If Var is selected in the Mixingitem, the injection pump is ramped upover 10 seconds.

    Step 3The System Pmp 2 contact is turnedon for 10 seconds. After 10 seconds,the System Pmp 2 contact is turnedoff.

    Step 4The System Pump contact (Sys P1)is turned on for 10 seconds.

    Step 5The boiler contact is turned on for 10seconds. After 10 seconds, the Boilercontact and Sys P1 contacts areshut off.

    Step 2If FLOT is selected in the Mixingitem, the mixing valve is run fullyclosed in the time set by the MotrSpd item. If Var is selected in theMixing item, the injection pump isramped down over 10 seconds.

    TROUBLESHOOTING - CHAPTER 4

    4.2 Testing The Sensors

    In order to test the sensors, theactual temperature at each sensorlocation must be measured. A goodquality digital thermometer with asurface temperature probe isrecommended for ease of use andaccuracy. Where a digital thermometeris not available, a spare sensor canbe strapped alongside the one to betested and the readings compared.First measure the temperature usingthe thermometer and then measurethe resistance of the sensor at thecontrol. The wires from the sensormust not be connected to the controlwhile the test is performed. Usingchart 4.1, estimate the temperaturemeasured by the sensor. The sensorand thermometer readings should beclose. If the test meter reads a veryhigh resistance, there may be abroken wire, a poor wiring connection,or a defective sensor. If theresistance is very low, the wiring maybe shorted, there may be moisture inthe sensor, or the sensor may bedefective. To test for a defectivesensor, measure the resistancedirectly at the sensor location.

    Do not apply voltage to a sensor atany time as damage to the sensormay result.

    Connecting The ControlMake sure all power to the devicesand terminal blocks is off, andremove any remaining jumpers fromthe terminals. Reconnect the terminalblocks to the control by carefullyaligning them with their respectiveheaders on the control, and thenpushing the terminal blocks into theheaders. The terminal blocks shouldsnap firmly into place. Install thesupplied safety dividers between theunpowered sensor inputs and thepowered wiring chambers. Applypower to the control. The operation ofthe control on power up is describedin the General Operation section ofthis manual.23

    Chart 4.1

  • VIEGA NA 1-877-VIEGA-NA 20 PI-17015-11/05

    TROUBLESHOOTING - CHAPTER 4

    MAX HEATThe Viega Advanced Snow MeltControl has a function called MAXHEAT. In this mode, the control turnson and operates the system up to themaximum set temperatures, and themixing device at the set percentage.The control continues to operate inthis mode for up to 24 hours or untileither the Item, Menu or Test button ispressed. This mode may be used forrunning all circulators during systemstart-up in order to purge air from thepiping. To enable the MAX HEATfeature, use the following procedure.

    1) Press and hold the Test button formore than 3 seconds. At this point,the control displays the words MAXHEAT and the word NO.

    2) Using the or buttons, selectthe word YES. After 3 seconds, thecontrol flashes the word MANUALand the number 100. This numberrepresents the desired output fromthe mixing device.

    3) Set the desired output of themixing device by using and/orbuttons on the control.

    4) To cancel the MAX HEAT mode,press either the Item, Menu, or Testbutton.

    5) Once the MAX HEAT mode haseither ended or is cancelled, thecontrol resumes normal operation.

    Menu Item

    Menu Item or

  • VIEGA NA 1-877-VIEGA-NA 21 PI-17015-11/05

    The control is no longer able to read the mixing supply sensor due to a short circuit. In this case,the control does not operate the snow melting system. Locate the problem as described on page18. To clear the error message from the control after the sensor has been repaired, press eitherthe Menu or Item button.

    4.4 Error Messages (1 of 3)

    DescriptionError Displayed

    The control was unable to store a piece of information into its EEPROM. This error can becaused by a noisy power source. The control will display the error message and will continue tooperate as normal. Pressing either the Menu or Item button will clear this error.

    The control was unable to read a piece of information stored in the ADJUST menu. Because ofthis, the control was required to load the factory settings into all of the items in the ADJUSTmenu. The control will stop operation until all of the items available in the ADJUST menu of thecontrol have been checked by the user or installer.

    An incorrect device has been connected to the tekmar Net tN2 input terminal. Once the problemhas been corrected, press either the Menu or Item button to clear the error message from thecontrol.

    A short circuit has been read between the tN2 terminal and a Com terminal on the control. Eitherthe wires leading to the tN2 device are shorted or the polarity of the wires is reversed. Determinethe cause and remove the short. To clear this error, press either the Menu or Item button.

    The control is no longer able to read the outdoor sensor due to a short circuit. In this case thecontrol assumes an outdoor temperature of 32F and continues operation. Locate the problem asdescribed on page 18. To clear the error message from the control after the sensor has beenrepaired, press either the Menu or Item button.

    The control is no longer able to read the outdoor sensor due to an open circuit. In this case thecontrol assumes an outdoor temperature of 32F and continues operation. Locate the problem asdescribed on page 18. To clear the error message from the control after the sensor has beenrepaired, press either the Menu or Item button.

    The control is no longer able to read the mixing supply sensor due to an open circuit. In thiscase, the control does not operate the snow melting system. Locate the problem as described onpage 18. To clear the error message from the control after the sensor has been repaired, presseither the Menu or Item button.

    The control is no longer able to read the mixing return sensor due to a short circuit. If the T MAXitem is set to OFF, the control will continue to operate as if the as if the mixing return sensor wasnot connected to the control. If the T MAX item is not set to OFF, the control does not operate thesnow melting system. Locate the problem as described on page 18. To clear the error messagefrom the control after the sensor has been repaired, press either the Menu or Item button.

    TROUBLESHOOTING - CHAPTER 4

  • VIEGA NA 1-877-VIEGA-NA 22 PI-17015-11/05

    TROUBLESHOOTING - CHAPTER 4

    DescriptionError Displayed

    The control is no longer able to read the mixing return sensor due to an open circuit. If the TMAX item is set to OFF, the control will continue to operate as if the mixing return sensor was notconnected to the control. If the T MAX item is not set to OFF, the control does not operate thesnow melting system. Locate the problem as described on page 18. To clear the error messagefrom the control after the sensor has been repaired, press either the Menu or Item button.

    The control is no longer able to read the boiler sensor due to a short circuit. If the Boil MIN itemis set to OFF, the control operates the Boiler contact when the mixing device starts to operate. Ifthe Boil MIN is not set to OFF, the control does not operate the snow melting system. Locate theproblem as described on page 18. To clear the error message from the control after the sensorhas been repaired, press either the Menu or Item button.

    The control is no longer able to read the boiler sensor due to an open circuit. If the Boil MIN itemis set to OFF, the control operates the Boiler contact when the mixing device starts to operate. Ifthe Boil MIN is not set to OFF, the control does not operate the snow melting system. Locate theproblem as described on page 18. If the boiler sensor was deliberately not installed, set the BoilSENS item to NONE. To clear the error message from the control after the sensor has beenrepaired, press either the Menu or Item button.

    The control is no longer able to read the slab sensor due to a short circuit. In this case, if thecontrol is currently in the MELTING mode, the control will target a fixed mixing water temperatureuntil the melting cycle is finished. Locate the problem as described in the Sensor ProductInstructions (PI-17016). To clear the error message from the control after the sensor has beenrepaired, press either the Menu or Item button.

    The control is no longer able to read the slab sensor due to an open circuit. In this case, if thecontrol is currently in the MELTING mode, the control will target a fixed mixing water temperatureuntil the melting cycle is finished. Locate the problem as described in Locate the problem asdescribed in the Sensor Product Instructions (PI-17016). To clear the error message fromthe control after the sensor has been repaired, press either the Menu or Item button.

    The control is no longer able to read the yellow sensor due to a short circuit. In this case, thecontrol will turn off the heater in the Snow Melt Sensor. Check the Snow Melt Sensor yellowtemperature sensor (black and yellow wires, terminals 4 & 6), and the wiring from the terminalplug to the sensor. To clear the error message from the control after the sensor has beenrepaired, press either the Menu or Item button.The control is no longer able to read the yellow sensor due to an open circuit. In this case, thecontrol will turn off the heater in the Snow Melt Sensor. Check the Snow Melt Sensor yellowtemperature sensor (black and yellow wires, terminals 4 & 6), and the wiring from the terminalplug to the sensor. To clear the error message from the control after the sensor has beenrepaired, press either the Menu or Item button.

    The control is no longer able to read the water detection circuit due to an open circuit. In thiscase, if the control is currently in the MELTING mode, the control will finish the snow meltingcycle. The snow melting system can only be operated using an external melt demand, RemoteDisplay Module 040 or the Remote Start/Stop Module 039. Otherwise, the control will operate asif the Snow Melt Sensor is dry. Check the water detection circuit (black and blue wires, terminals4 & 5) according to the Locate the problem as described in the Sensor Product Instructions (PI-17016). To clear the error message from the control after the error has been repaired, press theMenu or Item button.

    The control is no longer able to read the water detection circuit due to a short circuit. In this case,if the control is currently in the MELTING mode, the control will finish the snow melting cycle. Thesnow melting system can only be operated using an external melt demand, Remote DisplayModule 040 or the Remote Start/Stop Module 039. Otherwise, the control will operate as if theSnow Melt Sensor is dry. Check the Snow Melt Sensor water detection circuit (black and bluewires, terminals 4 & 5) according to the Locate the problem as described in the Sensor ProductInstructions (PI-17016). To clear the error message from the control after the error has beenrepaired, press either the Menu or Item button.

    4.4 Error Messages (2 of 3)

  • VIEGA NA 1-877-VIEGA-NA 23 PI-17015-11/05

    DescriptionErrorDisplayed

    The controls internal sensor is too hot. (Above 160F (71C)) In this case, the control will turn offthe heater in the Snow Melt Sensor until the control cools off. To clear the error message from thecontrol after the error has been repaired, press either the Menu or Item button.

    The control is reading a heater malfunction. In this case, unless the yellow sensor becomes toohot, the heater continues to try to operate. The snow melting system can only be operated usingan external melt demand, Remote Display Module 040 or the Remote Start/Stop Module 039.Check the Snow Melt Sensor heater circuit (red and black wires, terminals 3 & 4) according to theSensor Product Instructions (PI-17016). Make sure the yellow and brown wires are not reversed.To clear the error message from the control after the error has been repaired, press either theMenu or Item button.

    TROUBLESHOOTING - CHAPTER 4

    4.4 Error Messages (3 of 3)

  • VIEGA NA 1-877-VIEGA-NA 24 PI-17015-11/05

    5.1 Wiring And Piping Diagrams

    S1 S2

    S3

    S5

    S4

    Viega Advanced Snow Melt Control

    P1 P2P3

    Mechanical

    S3 = Mix Return Sensor

    P2 = System Pump

    S2 = Mix Supply SensorS1 = Boiler Sensor

    P1 = Boiler Pump

    P3 = Variable Speed Injection Pump

    S4 = Outdoor Air SensorS5 = Snow Melt Sensor

    120 V

    1Opn/Var

    PwrMix

    CIs Red Blk Blu Yel Brn/Slab

    Boil Com tN2 MixRet

    MixSup

    Com Out

    2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24Melt

    DemandSystemPmp 2

    Boiler SysP1

    PowerL N

    Note: This is only a conceptual drawing. The designer must determine whetherthis application will work in his system and must ensure compliance with coderequirements. Necessary auxiliary equipment, isolation relays (for loads greaterthan the specified internal relay ratings), and other safety and limitdevices must be added.

    Electrical

    S3 = Mix Return Sensor

    P2 = System Pump

    S4 = Outdoor Air Sensor

    S2 = Mix Supply SensorS1 = Boiler Sensor

    P1 = Boiler Pump

    T-TBoiler

    P2

    P1

    120 V (AC)L

    N24V

    C

    R

    Do not apply power

    Manual Switch(provided byothers)

    S1S2 S4

    S3

    P3

    P3 = Variable Speed

    S5

    Injection Pump

    S5 = Snow Melt Sensor

    Injection Pumping (variable speed pumping)

    WIRING AND PIPING DIAGRAMS - CHAPTER 5

  • VIEGA NA 1-877-VIEGA-NA 25 PI-17015-11/05

    M1S1

    S2

    S3

    S4

    Mechanical

    S3 = Mix Return Sensor

    P2 = System Pump

    S2 = Mix Supply SensorS1 = Boiler Sensor

    P1 = Boiler Pump

    P3 = Variable Speed Injection Pump

    S4 = Outdoor Air SensorS5 = Snow Melt Sensor

    S5

    120 V

    Viega Advanced Snow Melt Control

    Note: This is only a conceptual drawing. The designer must determine whetherthis application will work in his system and must ensure compliance with coderequirements. Necessary auxiliary equipment, isolation relays (for loads greaterthan the specified internal relay ratings), and other safety and limitdevices must be added.

    Electrical

    S3 = Mix Return Sensor

    P2 = System Pump

    S2 = Mix Supply SensorS1 = Boiler Sensor

    P1 = Boiler Pump1

    Opn/Var

    PwrMix

    CIs Red Blk Blu Yel Brn/Slab

    Boil Com tN2 MixRet

    MixSup

    Com Out

    2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24Melt

    DemandSystemPmp 2

    Boiler SysP1

    PowerL N

    M123 T-T

    Boiler

    P2

    P1

    120 V (AC)L

    N24VC

    R

    Manual Switch(provided byothers)

    S1

    S2 S4

    S3

    S5

    Do not apply power

    Three Position Actuator(18018, 18019)Voltage at Terminal 2 = Clockwise RotationVoltage at Terminal 3 = Counterclockwise Rotation

    S4 = Outdoor Air SensorS5 = Snow Melt Sensor

    WIRING AND PIPING DIAGRAMS - CHAPTER 5

    5.1 Wiring And Piping Diagrams

    Floating Action With Heat Exchanger

  • VIEGA NA 1-877-VIEGA-NA 26 PI-17015-11/05

    M1

    S1 S2

    S3

    S5

    Mechanical

    S3 = Mix Return Sensor

    P2 = System Pump

    S2 = Mix Supply SensorS1 = Boiler Sensor

    P1 = Boiler Pump

    P3 = Variable Speed Injection Pump

    S4 = Outdoor Air SensorS5 = Snow Melt Sensor

    S4

    120 V

    Viega Advanced Snow Melt Control

    Note: This is only a conceptual drawing. The designer must determine whetherthis application will work in his system and must ensure compliance with coderequirements. Necessary auxiliary equipment, isolation relays (for loads greaterthan the specified internal relay ratings), and other safety and limitdevices must be added.

    Electrical

    S3 = Mix Return Sensor

    P2 = System Pump

    S2 = Mix Supply SensorS1 = Boiler Sensor

    P1 = Boiler Pump1

    Opn/Var

    PwrMix

    CIs Red Blk Blu Yel Brn/Slab

    Boil Com tN2 MixRet

    MixSup

    Com Out

    2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24Melt

    DemandSystemPmp 2

    Boiler SysP1

    PowerL N

    M123 T-T

    Boiler

    P2

    P1

    120 V (AC)L

    N24VC

    R

    Manual Switch(provided byothers)

    S1

    S2 S4

    S3

    S5

    Do not apply power

    Three Position Actuator(18018, 18019)Voltage at Terminal 2 = Clockwise RotationVoltage at Terminal 3 = Counterclockwise Rotation

    S4 = Outdoor Air SensorS5 = Snow Melt Sensor

    WIRING AND PIPING DIAGRAMS - CHAPTER 5

    5.1 Wiring And Piping Diagrams

    Floating Action

  • VIEGA NA 1-877-VIEGA-NA 27 PI-17015-11/05

    6 Technical Data

    Viega Advanced Snow Melt Control

    Control Microprocessor PID control; This is not a safety (limit) controlPackaged weight 3.1 lb. (1400 g), Enclosure A, black PVC plasticDimensions 6-5/8" H x 7-9/16" W x 2-13/16" D (170 x 193 x 72 mm)Approvals CSA C US, meets ICES & FCC regulations for EMI/RFIAmbient conditions Indoor use only, 32 to 104F (0 to 40C), < 90% RH non-condensingPower Supply 115 V 10% 50/60 Hz 600 VARelays 230 V(AC) 5 A 1/3 hp, pilot duty 240 VAVariable Pump 230 V(AC) 2.4 A 1/6 hp, fuse T2.5 A 250 VDemand 20 to 260 V(AC) 2 VASensors NTC thermistor, 10k 77F (25C 0.2C) =3892

    Included Outdoor Sensor (Viega #16017) and Universal Sensor (Viega #16018)Advanced Snow Melt Control Sensor (Viega #17016) and Housing (Viega #17017)

    The installer must ensure that this control and its wiring are isolated and/or shielded from strong sources ofelectromagnetic noise. Conversely, this Class B digital apparatus complies with Part 15 of the FCC Rules and meetsall requirements of the Canadian Interference-Causing Equipment Regulations. However, if this control does causeharmful interference to radio or television reception, which is determined by turning the control off and on, the user isencouraged to try to correct the interference by re-orientating or relocating the receiving antenna, relocating thereceiver with respect to this control, and/or connecting the control to a different circuit from that to which the receiveris connected.

    Caution : The nonmetallic enclosure does not provide grounding between conduit connections. Use grounding typebushings and jumper wires.

    2004-2005 by tekmar Control Systems Ltd. All rights reserved. Used with permission of tekmar Control Systems Ltd.

    TECHNICAL DATA - CHAPTER 6

    4

    Re

    5

    Blk

    6

    Blu

    7

    Yel

    8

    BrnSlaMixVar Ret Sup

    9

    Boil

    10

    Co

    11

    tN2

    12

    Mix

    13

    Mix

    14

    Co

    15

    Out

    16

    MeltDeman Pmp 2

    17 18

    System Boiler

    19 22 23 24

    SyP1

    PowerL N

    Test

    Signal wiring must be rated at least 300 V

    not testingtestingtesting

    For maximum heat,press and hold Testbutton for 3 seconds.

    Made in Canada bytekmar Control Systems Ltd.tektra 90009K

    Power 115 V 10% 50/60 Hz 600 VARelays 230 V(AC) 5 A 1/3 hp, pilot duty 240 VAVar. Pump 230 V(AC) 2.4 A 1/6 hp, fuse T2.5 A 250 VDemand 20 to 260 V(AC) 2 VA

    offredred

    20 21

    158033

    Melt Demand

    WWSD

    CWCO

    Minimum

    Maximum

    Water

    Melting

    Menu Item

    Do not apply power1

    Op

    2

    Pwr

    3

    Cls H20

    29A

    Viega North AmericaAdvanced Snow Melt Control

  • NOTES

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    45501 VIEGA notes 17/11/05 13:34 Page 1

  • NOTES

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    45501 VIEGA notes 17/11/05 13:34 Page 1

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