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WHITE-RODGERS 1F91-71 Multi Stage Electronic Digital Thermostat Installation Guide
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,
removethethermostatandthewallmountingplateas
an assembly.
Figure 2. Removing thermostat from subbase
4. UsetheCrossReferenceGuidetofindthethermostat
type you are replacing.
5. Identify each wire attached to the old thermostat
using the labels enclosed with the new thermo-
stat. 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.
DONOTLETWIRESFALLBACKINTOTHEWALL.
TABLE 1. WIRE IDENTIFICATION LABELS
1
G
2
C
3
L
4
R
5
O
6
B
7
E1
8
E2
7. Install new thermostat using the following proce-
dures.
G
1
C
2
L
3
R
4
O
5
B
6
E1
7
E2
8
ATTACH SUBBASE TO WALL
11
W1
9
Y1
10
Y2
12
W2
13
W3
14
S1
15
S2
16
S3
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
gentlypullstraightout(seefig.2). Thethermostathas
pin and socket connectors. Forcing or prying on the
thermostat will cause damage to the unit.
W1
11
Y1
9
Y2
10
W2
12
W3
13
S1
14
S2
15
S3
16
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
1F91-71
TERMINAL
DESIGNATION
OLD THERMOSTAT
TERMINAL
DESIGNATION
LABEL
NUMBER
FUNCTION
(1)
(2)
G
C
Fan output
Transformer 24vAC common
—
(3)
—
R
(4)
Transformer 24vAC hot
Changeover output (cool)
Changeover output (heat)
—
(5)
O
(6)
B
(7)
—
—
Y1
Y2
W1
W2
W3
(8)
—
(9)
Stage 1 cool
(10)
(11)
(12)
(13)
Stage 2 cool
Stage 1 heat
Stage 2 heat
Stage 3 heat
3
| General | Details |
|---|---|
| Name | WHITE-RODGERS 1F91-71 Multi Stage Electronic Digital Thermostat Installation Guide |
| Make | WHITE RODGERS |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.11 MB |
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