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WHITE-RODGERS 1F91-71 Multi Stage Electronic Digital Thermostat Installation Guide
Expansion
plugs
2. Connect wires beneath terminal screws on subbase
using wiring schematic (see figs. 3 through 6).
Connect wires under
terminal screws
3. Place subbase over hole in wall and mark mounting
hole locations on wall using subbase as a template.
4. Move subbase out of the way. Drill mounting holes.
Mounting
hole
O
B
Y1
Y2
C
W1
5. Fasten subbase loosely to wall, as shown in fig. 3,
using two mounting screws. Place a level against
bottom of subbase, adjust until level, and then tighten
screws. (Leveling is for appearance only and will not
affect thermostat operation.) If you are using existing
mounting holes, or if holes drilled are too large and do
not allow you to tighten subbase snugly, use plastic
expansion plugs to secure subbase.
4-pin connector
Mounting
hole
R
W2
G
W3
9-pin connector
Pull wires through
this opening
6. Push excess wire into wall and plug hole with a fire-
resistant material (such as fiberglass insulation) to
prevent drafts from affecting thermostat operation.
Figure 3. Subbase
WARNING
CAUTION
!
!
DO NOT EXCEED MAXIMUM VOLTAGE OR CUR-
RENTRATINGS. FIRE,PERSONALINJURY,AND/
OR EQUIPMENT DAMAGE COULD RESULT.
To prevent electrical shock and/or equipment
damage, disconnect electrical power at the main
fuse box until installation is complete. Verify
power is off with a voltmeter.
NOTE
The following wiring diagrams show typical terminal iden-
tification and wiring. For proper installation, refer to the
original manufacturers' instructions.
Thermostat
Control
Circuit
THERMOSTAT
SYSTEM
O
B
Y1
Y2
G
W1
W2
W3
R
C
Changeover
Energized
In Heat
Compressor
Contactor
Stage 2
Heat
Relay
Heat
Relay
Stage 1
Stage 3
Hot
24vAC
120vAC
Neutral
Changeover
Energized
In Cool
Compressor
Contactor
Stage 1
Heat
Relay
Fan
Relay
TRANSFORMER
Stage 2
Figure 4. Typical wiring diagram for single transformer systems
4
| 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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