White Rodgers 1F95-0671 Wiring Diagrams, with Single Transformer, with Two Transformers

WIRING DIAGRAMS

Refer to equipment manufacturers' instructions for specifi c system wiring information. After wiring, see CONFIGURA- TION section for proper thermostat confi guration.

Wiring diagrams shown are for typical systems and describe the thermostat terminal functions.

	TERMINAL DESIGNATION DESCRIPTIONS
Terminal Designation	Description
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 back-
	light 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
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)

with Single Transformer

Jumper

		L	O/B	Y	Y2	W/E	W2	G	RH	RC	C
System
Single	Diagnostic		O					Blower/
			Energized Constantly
Stage 1							No Output	Circulator
	Indicator		in		No
(SS1)						Heat		Fan Energized	24 Volt	24 Volt	Optional*
	Input		Cool Mode
				Cool Mode	Output	Mode		on Call for	(Hot)	(Hot)	24 Volt
	or
	System		B	1st Stage		1st Stage		Cool (and	Heat	Cool	(Com-
					Cool		Heat Mode
Multi-	Malfunction							Heat if			mon)
Stage 2			Energized Constantly		Mode		2nd Stage	configured
	Switch		in Heat, Off,
(MS2)	Input				2nd			for Electric
			Emergency		Stage			Heat)
			Mode

Comfort Alert II Module

or Similar System

Diagnostic Module

See Module Instructions for details

NEUTRAL
24VAC	120VAC
HOT
* Common connection required for diagnostic or malfunction indication.
CLASS II
TRANSFORMER

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:

SINGLE STAGE (SS 1) gas, oil or electric. MULTI-STAGE (MS 2) gas, oil or electric.

After wiring, see INSTALLER CONFIGURATION section for proper thermostat configuration.

Figure 3 – Single Stage or Multi-Stage System (No Heat Pump)

with Two Transformers

Jumper

Remove Jumper Wire

between RH & RC

L

O/B

Y

Y2

W/E

W2

G

RH

RC

C

System

Single

O

Blower/

Energized Constantly

Stage 1

No Output

Circulator

in

No

(SS1)

Diagnostic

Heat

Fan Energized

24 Volt

24 Volt

Optional

Cool Mode

Indicator

Cool Mode

Output

Mode

on Call for

(Hot)

(Hot)

24 Volt

(Optional)

B

1st Stage

1st Stage

Cool (and

Heat

Cool

(Com-

Multi-

Energized Constantly

Cool

Heat Mode

Heat if

mon)

Stage 2

Mode

2nd Stage

configured

in Heat, Off,

(MS2)

2nd

for Electric

Emergency

Stage

Heat)

Mode

NEUTRAL

NEUTRAL

24VAC

120VAC

HOT

120VAC

24VAC

COOLING

HOT

CLASS II

HEATING

TRANSFORMER

CLASS II

TRANSFORMER

3