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Viega Digital Thermostat

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Viega Digital Thermostat User Guide Viega Digital Thermostat Features ■ Compact Design ■ Digital LCD Display ■ Regulates Floor or Room Temperature ■ Optional Floor Sensor ■ Setback Function ■ On / Off Switch Specifications ■ Control: Microprocessor control ■ Accuracy: 0.1°F ■ Set Temperature Range: 41 °F - 99 °F, 0.5 °F increments This document is subject to updates. ■ Environment Range: 32 °F - 122 °F For the most current Viega technical ■ Power Supply: 24 VAC +/_ 10% literature please visit www.viega.us. 60Hz 15 W max ■ Output: TRIAC output 24 Viega products are designed to be VAC, 15 W max installed by licensed and trained ■ Optional Floor Sensor: NTC thermistor plumbing, mechanical, and electrical (10K Ohms), 10 cable professionals who are familiar with Viega ■ Floor limiting range: 41­­°F - 98.6°F products and their installation. Installation ■ Electrical Protection: Class II - IP30 by non-professionals may void Viega LLC’s 2.60" warranty. Applications The digital thermostat is ideal for individual room temperature control. A user-friendly, three- button design allows for easy adjustment of settings. The thermostat can sense either room temperature or floor temperature. Adjustable temperature setback function allows for energy savings. The thermostat can control up to four 1.22" 3.15" powerheads directly or can be connected to a zone / circulator control box. With optional floor sensor, the thermostat provides floor high or low limit function for floor protection or floor warming. UG-HC 560621 0120 Digital Thermostat (EN) 1 of 8 Viega Digital Thermostat User Guide Installation ■ Remove oval rubber plug from front of °F °C thermostat faceplate. ■ Using a small Phillips screwdriver remove screw securing thermostat faceplate to Cover Screw mounting plate. ■ Remove the faceplate from mounting plate. Faceplate ■ Insert the thermostat wire through the bottom Plug left opening in the thermostat. ■ Attach the mounting plate to the wall approximately 60" above the floor and a minimum of 8" away from any openings. Do not locate the thermostat behind doors or above or next to any heat generating equipment. ■ Wire the thermostat as outlined in pages 3-5. ■ Attach the thermostat faceplate and secure with the cover screw. ■ Install the faceplate plug to hide the cover screw. ~60" Do not install thermostats in these locations Min. 8" 2 of 8 UG-HC 560621 0120 Digital Thermostat (EN) Viega Digital Thermostat User Guide Wiring Thermostat to Factory jumper between 3 and 4 must remain in place for use with Zone Control 2-wire powerhead. Factory jumper ■ Connect the R terminal of the thermostat between 3 and 4 must be removed for use to the R terminal of the zone control. with 4-wire powerheads and zone valves. Up R supplies power to the thermostat. to (4) powerheads may be controlled from ■ Connect the W terminal of the thermostat a single thermostat without the use of an to the W terminal of the zone control. external relay. Refer to zone control, zone W is the switching signal. valve, and powerhead product instructions ■ Connect the C terminal of the thermostat for further details. to the C terminal of the zone control. C is common. Zone Control (18060, 18062) with Optional Priority Thermostat Thermostat Thermostat 18050 18050 18050 C CRW NTC A/B CC RW NTC A/B CC RW NTC A/B Zone 4 Priority 120 V AC Isolated Power End Switch Supply Off On - R W C R W C R W C R W C Power In Power Zone 1 Zone 2 Zone 3 Zone 4 3 Fuse 5 amp max $ Zone 1 Zone 2 Zone 3 Zone 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 / Pump End Switch N/O COM Jumper Jumper 3 & 4 N/C 3 & 4 if Priority Zone 4 is used Viega Relay Powerhead (15061,15070) Zone Valve 2 Wire, 24 V, (17230, 17231, For use with 17234, 17235) Stainless Manifold Viega 3 Viega 3 Powerhead : (15061,15070) : 4 Wire, 24 V, For use with Stainless Manifold 3 3 : : UG-HC 560621 0120 Digital Thermostat (EN) 3 of 8 Viega Digital Thermostat User Guide Wiring Thermostat to Powerhead Viega ■ Connect the C and R terminals of the C C RW NTC A/B thermostat to transformer. ■ Connect the other C terminal and W terminal of the thermostat to Viega powerhead. ■ Up to (4) powerheads may be controlled from a single thermostat without the use of an To T-T Boiler external relay. Contact, Pump N C Relay or other auxiliary device R requiring contact L Viega Viega closure CC RW NTC A/B Wiring Floor Sensor The digital thermostat floor sensor is a two- wire, water-sealed probe that can be used to accurately measure slab or floor temperatures. Floor sensor should be placed in conduit for protection and repair. ½" PEX (capped or N plugged) is commonly used as conduit for the C slab sensor. Sensor should be 18" from line voltage (110V). If crossing line voltage wire, R cross at 90° angle. Line voltage interference can L result in inaccurate readings of the sensor. ■ Connect one wire of the floor sensor to one Wiring Thermostat to NTC terminal of the digital thermostat. Four Wire Powerhead / ■ Connect the other wire of the floor sensor to the other NTC terminal of the digital Zone Valve Head thermostat. ■ Connect a yellow wire from the powerhead/ zone valve head to the C terminal on the digital thermostat. ■ Connect the other yellow wire from the powerhead/zone valve head to the W $$ 38 /5$"# terminal on the thermostat. ■ The red wires can be connected to the boiler contact (TT), pump relay or other auxiliary device requiring contact closure. ■ Connect the C terminal from the transformer to the C terminal on the thermostat. ■ Connect the R terminal from the transformer to the R terminal on the thermostat. Legend: Zone Controls Low Voltage Line Voltage 4 of 8 UG-HC 560621 0120 Digital Thermostat (EN) Viega Digital Thermostat User Guide Corresponding Zone Control Programming and Thermostat Terminals Start Up ■ Use the switch on the right side of the Zone Control - 18060/62 Zone Control - 18032 thermostat to power on or power off the Thermostat - 18050 Thermostat - 18029 heating. CAUTION! R L In this mode, your installation can C N freeze. W ■ The setting temperatures are kept in memory indefinitely. Resistance Chart Display Window Temperature Resistance ( k Ω ) 1 Operating mode menu (programming parameter) 50°F ~ 19.5 k Ω 2 Boiler in operation 59°F ~ 15.5 k Ω 3 Fan/AC operation 4 When displayed thermostat indicates the 68°F ~ 12.5 k Ω measured air temperature or floor temperature 77°F ~ 10k Ω if floor sensor is attached. If flashing attention 86°F ~ 8k Ω is required to one of the below: ■ Actual floor temperature is below the minimum floor temperature set in the Testing Floor Sensor thermostat parameters ■ Actual floor temperature is above the Tools maximum floor temperature set in the A good quality electrical test meter capable of thermostat parameters measuring up to 5,000k Ω (1k Ω = 1,000 Ω). ■ Floor sensor is short circuited A good quality analog or laser thermometer. If 5 Measured temperature or set temperature an analog style thermometer is used it must be 6 Programming parameter left on the floor long enough for it to acclimate to the floor temperature. 3 1 Instructions ■ Measure the floor temperature. 6 ■ Disconnect the floor sensor wires at the thermostat 2 ■ Connect the electrical tester to the floor sensor wires and measure resistance. d' ■ Compare the measured temperature and resistance to what is listed in the table above. ■ If the measured resistance is higher or lower 4 5 by +/-5%, you may have a damaged sensor or the sensor wire may be broken or shorted. Example: if the floor temperature is 77°F the Operating Mode Menu resistance should be 10,000 Ω. Press OK button to cycle through operating mode menus. When in desired operating mode Do not apply voltage to the floor press either the + or - button to activate the sensor at any time. This will damage flashing display. Desired temperature can be set the sensor. by using the + or - button to increase or reduce temperature setting. UG-HC 560621 0120 Digital Thermostat (EN) 5 of 8 Viega Digital Thermostat User Guide Comfort Operating Mode J1 Parameter ° F Places thermostat in comfort temperature Select CLd for thermostat control of cooling operation indefinitely. systems or Hot for heating applications. Factory default is Hot. Reduced Operating Mode J4 Parameter ° F Places thermostat in reduced temperature operation indefinitely. Returning to Comfort Select NC if using normally closed actuating Operating Mode takes thermostat out of motors or NO if normally open actuators are being Reduced Mode. used. Viega Actuators (powerheads, zone valves) are normally closed and NC is the default setting. Parameter Menus J5 Parameter ■ Press the OK key and hold for 7 seconds, then use + or - to select the installation parameter to be adjusted. ■ Press OK to toggle between the parameter setting or to edit the value. ■ If the value starts to blink you can use + or - keys to adjust this value. Parameter allows exercising of system pump if ■ Press + and - keys at the same time to reset system is inactive for a 24 hour period. Exercise this value to the factory default value. Once duration is one minute daily. Select PNp for pump you have adjusted the value press OK to exercising or no to disable this feature. Factory default is for pump exercising no. validate this parameter value. When you have finished, use + or - keys to go to the End display and then press OK key to exit J6 Parameter installation parameter menu.
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