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1F83-0471

Single Stage

3-wire

Zone Valve

application

Blower/Circulator

Fan Energized

Opens

Valve

(4)

Constant

24 Volt

(Com-

mon)

24 Volt

(Hot)

Cool

System

6

Y

W

C RC

CLASS II

TRANSFORMER

HOT

24VAC

NEUTRAL

120VAC

24 Volt

(Hot)

Heat

(5)

RH

G

Jumper

Closes

Valve

(6)

3-Wire (SPDT) Heat Only Zone Valve Wiring

TYPICAL WIRING

AND CONFIGURATION

TYPICAL WIRING

1F83-0422/1F85-0422

Heat Pump 1

(HP1)

O

Energized in

Cool Mode

B

Energized in

Heat, Off,

Emergency

Mode

No

Output

Heat and

Cool Mode

1st Stage

(Compressor)

Blower/

Circulator

Fan Energized

on Call for

Heat or Cool.

Set Elect/Gas

Option for

Emergency

Mode

Heat Mode

2nd Stage.

Emergency

Mode 2nd

Stage

Emergency

Mode

1st Stage

Optional*

24 Volt

(Com-

mon)

Fault Indicator

or

System

Malfunction

Switch

24 Volt

(Hot)

Cool

System

Y

W/E

C

L

RC

CLASS II

TRANSFORMER

HOT

24VAC

NEUTRAL

120VAC

24 Volt

(Hot)

Heat

RH

Jumper

Y2

W2

G

Jumper

Comfort Alert II Module

or Similar System

Malfunction Module

O/B

Heat Pump Systems

NOTE: If your system

does not provide an

E connection, jumper

W2 to W/E to use the

Auxiliary Heat in the

Emergency Mode.

* Common connection

required for fault or

malfunction indication.

TYPICAL WIRING DIAGRAMS

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