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.
3.If the old thermostat has a wall mounting plate, remove the thermostat and the wall mounting plate as an assembly.
4.Use the Cross Reference Guide to find the thermostat type you are replacing.
5.Identify each wire attached to the old thermostat using the labels enclosed with the new thermo- stat (see Table 1). Record the identification of the wire on the corresponding blank in Table 2.
6.Disconnect the wires from old thermostat one at a time. Pull at least 6 inches of wire out of the wall.
DO NOT LET WIRES FALL BACK INTO THE WALL.
7.Install new thermostat using the following proce- dures.
PULL STRAIGHT OUT
Figure 2. Removing thermostat from subbase
TABLE 1. WIRE IDENTIFICATION LABELS
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
G | C | L | R | O | B | E1 | E2 |
G | C | L | R | O | B | E1 | E2 |
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
Y1 | Y2 | W1 | W2 | W3 | S1 | S2 | S3 |
Y1 | Y2 | W1 | W2 | W3 | S1 | S2 | S3 |
9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
|
|
|
|
|
|
|
|
ATTACH SUBBASE TO WALL
1.Remove the packing material from the thermostat. Place the fingers of one hand on the center top and bottom portion of the thermostat. Grasp the subbase in the other hand on the top and bottom center, and gently pull straight out (see fig. 2). The thermostat has pin and socket connectors. Forcing or prying on the thermostat will cause damage to the unit.
NOTE
THIS THERMOSTAT REQUIRES BOTH THE HOT AND COMMON SIDES OF THE 24vAC TRANSFORMER TO BE PRESENT TO THE THERMOSTAT FOR OPERA- TION.
TABLE 2. TERMINAL REFERENCE
| NEW THERMOSTAT |
| OLD THERMOSTAT | ||
LABEL | TERMINAL |
|
| TERMINAL | |
NUMBER | DESIGNATION | FUNCTION | DESIGNATION | ||
|
|
|
|
|
|
(1) | G | Fan Output |
|
|
|
(2) | C | Transformer 24vAC Common |
|
|
|
(3) | L | Malfunction Light |
|
|
|
(4) | R | Transformer 24vAC Hot |
|
|
|
(5) | O | Changeover Output (Cooling) |
|
|
|
(6) | B | Changeover Output (Heating) |
|
|
|
(7) | E1 | Emergency Heat Relay (cycles on 1st |
|
|
|
|
| stage in Emergency Mode) |
|
|
|
(8) | E2 | Emergency Heat Relay (continually |
|
|
|
|
| energized in Emergency Mode) |
|
|
|
(9) | Y1 | Stage 1 Cool |
|
|
|
(10) | Y2 | Stage 2 Cool |
|
|
|
(11) | W1 | Stage1 Heat (Compressor) |
|
|
|
(12) | W2 | Stage 2 Heat (Auxiliary) |
|
|
|
(13) | W3 | Stage 3 Heat (Auxiliary) |
|
|
|
|
|
|
|
|
|
3
