Wiring Diagrams - Emerson White Rodgers 1F95-0680 Installation And Operating Instructions Manual

Refer to equipment manufacturers' instructions for specific
system wiring information. After wiring, see CONFIGURA-
TION section for proper thermostat configuration.
Terminal Designation
O/B ...................Changeover valve for heat pump energized constantly in cooling and off/heating
Y2 ....................2nd Stage Compressor
Y ....................Compressor Relay
G ....................Fan Relay
RC ....................Power for Cooling
RH ....................Power for Heating
C ....................Common wire from secondary side of cooling (Optional). Required for fault indication, continuous backlight operation
or remote temperature sensor operation 6 Powered closed 3rd wire for 3-wire zone valve
W/E ...................Heat Relay/Emergency Heat Relay (Stage 1) (3rd Stage Heat in HP2)
W2 ....................2nd Stage Heat (4th Stage Heat in HP2)
- ....................Common (DC) for wired remote temperature sensor
S ....................Frequency signal from remote temperature sensor
+ ....................Power (DC) to remote temperature sensor
A1 ....................Economizer/Time of Day Output energized in occupied (Morn, Day, and Eve) periods, powered by RC or RH terminal
L ....................Compressor diagnostic indicator for systems with diagnostic connection typically found on Heat pump systems or
with Copeland's Comfort Alert
Figure 2 – Single Stage or Multi-Stage System (No Heat Pump)
L
System
Single
Diagnostic
Stage 1
Indicator
(SS1)
Input
or
System
Multi-
Malfunction
Stage 2
Switch
(MS2)
Input
Comfort Alert II Module
or Similar System
Diagnostic Module
See Module Instructions
for details
Single Stage and Multi-Stage Connections
Refer to equipment manufacturers' instructions for specific
system wiring information.
This thermostat is designed to operate a single-transformer
or two-transformer system.
You can configure the thermostat for use with the following
systems:
Figure 3 – Single Stage or Multi-Stage System (No Heat Pump)
L
System
Single
Stage 1
(SS1)
Diagnostic
Indicator
(Optional)
Multi-
Stage 2
(MS2)
NEUTRAL
120VAC
24VAC
HOT
HEATING
CLASS II
TRANSFORMER
TERMINAL DESIGNATION DESCRIPTIONS
Description
with Single Transformer
Y
O/B Y2 W/E
O
Energized Constantly
in
No
Heat
Cool Mode
Output
Cool Mode Mode
1st Stage
1st Stage
B
Cool
Energized Constantly
Mode
in Heat, Off,
2nd
Emergency
Stage
Mode
* Common connection required for diagnostic or malfunction indication.
with Two Transformers
Y Y2
O/B
O
Energized Constantly
in
No
Heat
Cool Mode
Output
Cool Mode
Mode
1st Stage
1st Stage
B
Cool
Energized Constantly
Mode
in Heat, Off,
2nd
Emergency
Stage
Mode
Wiring diagrams shown are for typical systems and describe
the thermostat terminal functions.
Jumper
W2 G RH
RC
Blower/
Circulator
No Output
Fan Energized
24 Volt 24 Volt
on Call for
(Hot) (Hot)
Cool (and
Heat Cool
Heat if
Heat Mode
configured
2nd Stage
for Electric
Heat)
Single Stage (SS 1)
Multi-Stage (MS 2)
After wiring, see INSTALLER CONFIGURATION section for
proper thermostat configuration.
Jumper
RH
G RC
W/E W2
Blower/
Circulator
No Output
Fan Energized
24 Volt 24 Volt
on Call for
(Hot) (Hot)
Cool (and
Heat Cool
Heat if
Heat Mode
configured
2nd Stage
for Electric
Heat)

WIRING DIAGRAMS

C A1
Time of
Day/
Optional*
(Economizer/
24 Volt
Damper)
(Com-
Energized
mon)
in Morn,
Day, Eve
Periods
NEUTRAL
120VAC
24VAC
HOT
CLASS II
TRANSFORMER
gas, oil or electric.
gas, oil or electric.
Remove Jumper Wire
A1 Switch
between RH & RC
Power
C A1
Source
Cool
Transformer
Time of
Heat
Day/
Transformer
Optional
(Economizer/
24 Volt
Damper)
(Com-
Energized
mon)
in Morn,
Day, Eve
Periods
NEUTRAL
120VAC
24VAC
HOT
COOLING
CLASS II
TRANSFORMER
Switch
Position
RC
RH
3