Install guide 3M-22 Caution •Your thermostat is a precise instrument, handle it with care. •Turn off electricity to the appliance before installing or servicing thermostat or any part of the system. • Do not turn electricity back on until work is completed. • Do not short (jumper) across electric terminals at control on furnace or air conditioner to test the system. This will damage the thermostat and void your warranty. •All wiring must conform to local codes and ordinances.
Install guide 3M-22 Caution Tools To avoid electrical shock and to prevent damage to the furnace, air conditioner, and thermostat, disconnect the power supply before beginning work. This can be done at the circuit breaker, or at the appliance. You will need a small Phillips screwdriver and possibly a drill with 3/16-in. (4.8mm) bit for wall mounting. Location Replacement installations - mount the new thermostat in place of the old one. New installations - follow the guidelines listed below.
Remove old unit IMPORTANT : LABEL ALL WIRES BEFORE DISCONNECTING THEM! • Switch electricity to the furnace and air conditioner OFF; then proceed with the following steps. • Remove cover from old thermostat. Most are snap-on types and simply pull off. Some have locking screws on the side or front. These must be loosened. Note the letters printed near the terminals. Attach labels (enclosed) to each wire for identification.
PG Before you Connect Wires 5 Please follow these guidelines for safe and secure wire connections. • Easy Terminals do not require stripping the wire. • Clip any bare wire from previous installation. • Take care not to damage the labels for each wire in handling. • Fan wires out as illustrated with 3M-22 below the wall opening. • Wires will dress behind the 3M-22 and up over the terminal area. • Use the Step-By-Step diagram as your guide. • Do not bunch wires behind 3M-22.
PG Find the set-up diagram for your system C W RH 2 Wire Heat 7 • Find the referenece page with your wiring diagram and jumper set-up information. Remember, the C wire is optional.
Wall Mount the 3M-22 3M-22 • Hold the 3M-22 against the wall, with the wires coming over the top above terminal block. The 3M-22 will cover the hole in the wall. • Position 3M-22 for best appearance. Use the optional standoffs if more space for wires is needed behind the 3M-22. •Attach the base to the wall with the screws provided. • If you are mounting the base to sheet rock or if you are using the old mounting holes, use the plastic anchors provided. Drill a 3/16-in.(4.
PG Check Unit Follow these procedures to verify you have correctly installed the 3M-22. To check Fan: (If you connected the G wire - fan relay) • Switch the FAN switch to the ON position. Verify that air is blowing from the system. Return to AUTO position for normal operation. To check HEAT mode: Set the mode switch to HEAT. Set the fan switch to AUTO. TEMP UP button Temperature Display 11 Mode Switch Fan Switch TEMP DOWN button • Using the TEMP + button raise the Target Temp to 90deg.
PG 13 Power Options BATTERIES ONLY - This thermostat can run on batteries only using 2AAA alkaline batteries. The batteries will last at least 1 year; replace the batteries once a year or when the low battery icon comes on the display. If the batteries are not replaced, the thermostat will shut off the HVAC and then stop working. 24VAC - This thermostat can run on the HVAC 24VAC (C wire) if available.
2 WIRE HEAT Heating GAS MILLIVOLT or 24vac PG 15 STEP 1 - Connect the R (or RH) wire to the RH terminal on the 3M-22. This connects the Heater Power to the thermostat. 4 5 STEP 2 - Connect the W wire to the W on the 3M-22. 6 7 1 2 3 This connects the heater control line to the 3M-22. 8 SET JUMPERS STEP 3 - Set Config jumpers per this diagram. Your Heater is now connected to the 3M-22. Please Go To Page 9 GAS Milivolt Heat C OPTIONAL POWER W R 3M-22 NOTE: Wires marked with dotted line are optional.
W Y RH G 4 Wire Heat/Cool PG 17 STEP 1 - Connect the W wire to the W terminal on the SET JUMPERS thermostat. This connects to the heater control line. 4 5 or STEP 2 - Connect the Y wire to the Y terminal on the 6 7 1 2 3 3M-22. This connects to the Cooler compressor. 8 STEP 3 - Connect the RH or R wire to the RH terminal on the thermostat. This connects the Heater/Cooler Power. STEP 4 - Connect the G wire to the G terminal on the Thermostat. This connects to the Fan.
B or O Y R G 4 Wire Heat Pump w/o Aux PG STEP 1 - Connect O wire to the O terminal or B wire to the B terminal on the 3M-22. (If you have both O and B - connect O wire to O terminal DO NOT connect B to B terminal - see pg 24 Trane for B wire terminal) This connects the change-over valve. SET JUMPERS STEP 2 - Connect the Y wire to Y on the 3M-22. 4 5 This connects the Compressor. 6 7 STEP 3 - Connect the R wire to RH on the 3M-22. 1 2 3 8 This connects to the 24vac power.
W2 W Y Y2 RH RC G 2 Stage Heat and Cool 21 PG STEP 1 - Connect the W wire to the W terminal and W2 to W2 on the 3M-22. This connects 2 stages of heat. STEP 2 - Connect the Y wire to the Y terminal and Y2 wire to Y2 on the 3M-22. This connects 2 stages of cool. SET JUMPERS STEP 3 - Connect the RH or R wire to the RH terminal on 4 5 or the thermostat. This connects the Heater/Cooler Power. 6 7 1 2 3 8 STEP 4 - Connect the G wire to the G terminal on the Thermostat. This connects to the Fan.
3M-22 Features PG 23 This thermostat can be used with all millivolt and 24VAC heating and cooling systems. It cannot be used with line voltage systems. This thermostat is digital and your desired heat or cool temperatures can easily be set on the large screen with the +/- buttons on the front. A minimum 4 minute off time protects heating and cooling systems from damage. This thermostat uses a new technique called sequential staging for more comfort with faster reaction to requested temperature changes.
Wire Reference cont Your Wires Jumper Reference RESET UNIT AFTER CHANGING JUMPERS 1 PUMP AUX ELECT 2 12 hr CELSIUS 3 FAHRENHEIT OPEN CLOSED SINGLE POWER(R) HEAT PUMP'S CLOSED AUX ONLY HEAT PUMP GAS/ELEC HEAT SELECT POWER RH 4 POWER RC NORM/PUMP/AUX SELECT CELSIUS FAHRENHEIT CLOSED 24hr 26 3 Wire Zoned Hot Water Solenoid Valves R RH W A Y (the 3rd wire) W Configuration jumpers allow your 3M-22 to be adapted to many HVAC different HVAC control applications.
