White Rodgers 1F97W-71 User Manual page 5

6 MV
Millivolt
System
6 MV Y
Millivolt Cooling
System System
Figure 9. Typical Wiring Diagram for Millivolt Systems + Cool Only, 3-Wire Systems
6 MV
6 4
Zone 5
Valve
1 2
Figure 10. Typical Wiring Diagram for Heat Only, 3-Wire, Zone Valve Systems
6 MV
CAUTION
!
See HEAT/COOL, 5-WIRE
SYSTEMS section below
to determine whether
this thermostat can be
used with your system.
Figure 11. 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
Y G W RC
Figure 8. Typical Wiring Diagram for Millivolt Systems
G W RC
Fan
Relay
Y G W
Y G W
Cooling Fan Heating
System Relay System
THERMOSTAT
RH
SYSTEM
THERMOSTAT
RH
SYSTEM
Hot
24vAC
120vAC
Neutral
TRANSFORMER
THERMOSTAT
RC RH
SYSTEM
Hot
24vAC
120vAC
Neutral
TRANSFORMER
THERMOSTAT
RC RH
SYSTEM
Hot
24vAC
120vAC
Neutral
HEATING TRANSFORMER
Hot
24vAC
120vAC
Neutral
COOLING TRANSFORMER
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.
From millivolt system
6
MV
RH
From millivolt system
Thermostat Terminal Connections
From millivolt system
From 24vAC
transformer
6
MV
RH
From fan relay
From cooling system
Thermostat Terminal Connections
From zone valve
6
MV
RH
From 24vAC transformer
(through zone valve)
Thermostat Terminal Connections
From heating system
From 24vAC
cooling transformer
6
MV
From fan relay
RH
From cooling system
From 24vAC
heating transformer
Thermostat Terminal Connections
W
RC
G
Y
W
RC
G
Y
W
RC
G
Y
W
RC
G
Y
5