White Rodgers 1F97-1277 specifications Single Stage Connections, Wiring Connections

WIRING CONNECTIONS

Single 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 gas, oil or electric.

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

Single Stage System with Single Transformer

Jumper

To Remote Temperature Sensor

{

B

O

Y

G

RC RH C*

+

S

-

W

6

L

System

Blower/

Circula-

DC

DC

Single

Energized

tor Fan

24 Volt

supply

Remote

Return

Third

Diagnostic

Stage

Energized

Energiz-

on call

Energiz-

24 Volt

24 Volt

Com-

voltage

Temp-

to

Energized

wire for

Indicator

(SS)

in Heat

ed in

for Cool

ed on

(Hot)

(Hot)

mon

to re-

erature

Remote

on call for

3-wire

or Off

Cool

(Com-

call for

mote

(See

Cool

Heat

(option-

Sensor

Temp-

Heat

zone

Note 1 )

Mode

Mode

pressor)

Cool &

al)

Temp-

signal

erature

valve

for Heat

erature

Sensor

(if ELE

Sensor

is sel-

ected)

NEUTRAL

24VAC

120VAC

* Common connection

HOT

CLASS II

required for fault or

TRANSFORMER

malfunction indication

and remote sensor.

Single Stage with Two Transformers

Remove Jumper Wire

To Remote Temperature Sensor

between RH & RC

Jumper

{

NOTE: If continuous backlight or hardwired

power input are desired but do not function

B

O

Y

G

RC

RH

C*

+

S

-

W

6

L

in both HEAT and COOL modes, cut the

heating transformer 24V wires and tape off.

System

Connect the neutral circuit disconnected

Blower/

from the heating transformer to the neutral

Energized

Circula-

DC

DC

circuit of the cooling transformer. Disconnect

tor Fan

24 Volt

supply

Remote

Return

the wire to the RH terminal and install a

Single

Energized

Energized

on call

Energiz-

24 Volt

24 Volt

Com-

voltage

Temp-

to

Energized

Third wire

Diagnostic

jumper between RH and RC. Depending on

for Cool

ed on

Stage

in Heat,

in Cool

(Com-

call for

(Hot)

(Hot)

mon

to re-

erature

Remote

on call for

for 3-wire

Indicator

the system requirements, replace the

(SS)

Off Mode

Mode

Cool

Heat

(option-

mote

Sensor

Temp-

Heat

zone valve

(See

pressor)

Heat or

cooling transformer with a 75VA class II

al)

Temp-

signal

erature

Note 1 )

Cool

erature

Sensor

transformer if needed.

(if ELE

Sensor

is sel-

ected)

NEUTRAL

NEUTRAL

24VAC

120VAC

HOT

120VAC

24VAC

COOLING

HOT

* Common connection

CLASS II

HEATING

TRANSFORMER

CLASS II

required for fault or

TRANSFORMER

malfunction indication

and remote sensor.

NOTE ➀: Connection for Call for Service diagnostic indicator compatible with mechanical or electronic condenser control with Comfort AlertTM.

3