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W H I T E - R O D G E R S
DIGITAL COMFORT SET II
1F92-71
Multi-stage/Heat Pump Electronic Digital Thermostat
WHITE-RODGERS
INSTALLATION INSTRUCTIONS
Operator: Save these instructions for future use!
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.
DESCRIPTION
This wall-mounted, low voltage thermostat maintains
room temperature by controlling the operation of heat
pumps and multi-stage systems. U
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SPECIFICATIONS THIS CONTROL IS DESIGNED FOR USE WHERE BOTH SIDES OF THE TRANSFORMER ARE PRESENT TO THE THERMOSTAT (both the hot and common sides of the 24vAC end of the transformer.) Anticipation: ELECTRICAL DATA Heating 4 to 40 Electrical Rating: Cooling 4 to 40 Reference Values 20 to 30vAC 50/60 Hz. } Auxiliary 4 to 40 0.01 to 1.5 Amps (Load per terminal) 2.5 Amps Maximum Total Load (All terminals com- THERMAL DATA bined) Temperature Range: 40°F to 99°F (4°C to 37°C) WARNING ! STAGING DATA Up
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REPLACEMENT INSTALLATION REMOVE OLD THERMOSTAT 1. Shut off electricity at the main fuse box until installa- tion is complete. Verify power is off with a voltmeter. 2. Remove the front cover of the old thermostat. With wires still attached, remove wall plate from the wall. PULL STRAIGHT OUT 3. If the old thermostat has a wall mounting plate, Figure 2. Removing thermostat from subbase remove the thermostat and the wall mounting plate as an assembly. 4. Use the Cross Reference Guide to find the
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Expansion 2. Connect wires beneath terminal screws on subbase plugs using wiring schematic for your particular application Connect wires under terminal screws (see figs. 3 through 6). 3. Place subbase over hole in wall and mark mounting hole locations on wall using subbase as a template. Mounting S1 S2 S3 4. Move subbase out of the way. Drill mounting holes. O W1 hole E1 B 4-pin connector E2 Mounting Y1 5. Fasten subbase loosely to wall, as shown in fig. 3, Y2 L hole C R using two mounting scr
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NOTE IF SAFETY CIRCUITS ARE IN ONLY ONE OF THE SYSTEMS, REMOVE THE TRANSFORMER OF THE SYSTEM WITH NO SAFETY CIRCUITS. Malfunction Thermostat Light Control Circuit THERMOSTAT O B Y1 Y2 G W1 E1 E2 W2 W3 C L R SYSTEM Emergency Changeover Compressor Heat Heat System Limit or CUT AND Relay Monitor Energized Contactor Relay Relay Safety Constant TAPE OFF! Switch In Heat Stage 2 Stage 3 Stage 1 Output Switches Hot Changeover Emergency Heat Compressor Limit or 120vAC 24vAC Fan TRANSFORMER Relay Energize
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ATTACH THERMOSTAT TO SUBBASE IT IS RECOMMENDED THAT YOU SET OPTION SWITCHES TO DESIRED POSITION BEFORE ATTACH- ING ON SUBBASE (see OPERATION). IT IS ALSO RECOMMENDED THAT YOU PROGRAM THE THERMOSTAT WITH BATTERY INSTALLED BEFORE ATTACHING ON SUBBASE (see OPERATION GUIDE for programming instructions). POWER TO THERMOSTAT MUST BE OFF BEFORE ATTACHING THERMOSTAT TO WALL. FAILURE TO TURN OFF POWER BEFORE ATTACHING THERMO- STAT MAY CAUSE EQUIPMENT DAMAGE DUE TO RAPID COMPRESSOR CYCLING. ENGAGE TWO
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5. Economizer — 1st stage cooling LOCKOUT BYPASS OPTION When using economizer with W1 Y2 single stage heat pump, field CAUTION jumper W1 & Y2 ! ON Switch #1 (see steps 1-4) Switch #2 (see steps 1-4) FOR QUALIFIED SERVICE TECHNICIANS’ USE Switch #3 ON ONLY. OPERATORS SHOULD NOT USE THIS 1234 Switch #4 (see step 6) FEATURE DUE TO POSSIBILITY OF EQUIPMENT 6. Automatic Changeover from Heat to Cool OR PROPERTY DAMAGE, OR PERSONAL INJURY. ON Switch #1 (see steps 1-4) Switch #2 (see steps 1-4) DO NOT
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After heating and cooling system have been checked and COOLING SYSTEM are running properly, determine if automatic changeover is desired. When option switch #4 is in the proper position, CAUTION ! automatic changeover is enabled by pressing the SYS- TEM SWITCH until AUTO is displayed (see SET OPTION To prevent compressor and/or property damage, SWITCHES). if power to the compressor has been off or interrupted for more than 1 hour and the outdoor Refer to the OPERATION GUIDE if you need addition
