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NOTE
Cooling
RED jumper wire (pro-
System
vided
with
thermostat)
must be connected be-
tween
thermostat's
RH
and RC terminals for pro-
per thermostat operation
with this system.
Figure 7. Typical wiring diagram for heat/cool, 4-wire, single transformer systems
NOTE
This system does not
require RED jumper
wire (provided with
thermostat).
Figure 8. Typical wiring diagram for heat/cool, 5-wire, two-transformer system
5. Move subbase out of the way. Drill mounting holes.
6. 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.
7. Push excess wire into wall and plug hole with a fire-
resistant material (such as fiberglass insulation) to
prevent drafts from affecting thermostat operation.
ATTACH THERMOSTAT TO SUBBASE
CAUTION
!
USE
SYSTEM
TO TURN THERMOSTAT OFF BE-
HEAT - OFF - COOL
FORE ATTACHING THERMOSTAT TO WALL.
FAILURE TO TURN OFF THERMOSTAT BEFORE
ATTACHING MAY CAUSE EQUIPMENT DAMAGE
DUE TO RAPID COMPRESSOR CYCLING.
JUMPER
WIRE
Y
G
W
RC
Fan
Heating
Relay
System
Y
G
W
Cooling
Fan
Heating
System
Relay
System
THERMOSTAT
RH
SYSTEM
Hot
24 VAC
120 VAC
Neutral
TRANSFORMER
THERMOSTAT
RC
RH
SYSTEM
Hot
24 VAC
120 VAC
Neutral
HEATING TRANSFORMER
Hot
24 VAC
120 VAC
Neutral
COOLING TRANSFORMER
To attach thermostat to subbase, line up the plastic snap
guides at the bottom of the thermostat and the two
connector pins on the thermostat with the connectors
near the bottom left section of the subbase (when viewed
from the front). Gently pivot the thermostat up until the six
pin connectors and the plastic snaps lock into place (see
fig. 9). Be gentle when attaching thermostat. If the
thermostat does not seem to be attaching to the subbase
easily, make sure that the connector pins and plastic
snaps are properly aligned, and that excess wire is
pushed into the wall. Damage to the thermostat may
occur if force is used.
ENGAGE TWO LOWER GUIDES;
Figure 9. Attaching thermostat to subbase
From heating system
CONNECT red jumper
wire (provided)
RH
From fan relay
From cooling system
From 24 VAC
transformer
Thermostat Terminal Connections
From heating
From 24 VAC
system
cooling transformer
From fan relay
RH
From cooling
From 24 VAC
system
heating transformer
Thermostat Terminal Connections
PIVOT UP
W
RC
G
Y
W
RC
G
Y
5
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