Emerson 1F97-1277 specifications Single Stage Connections, Wiring Connections, Heat Pump Systems

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:

WIRING CONNECTIONS

Single stage gas, oil or electric..

HEAT PUMP TYPE 1 (HP 1). Single stage compressor system; gas or electric backup..

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

HOT

*Common connection required for fault or

malfunction indication and remote sensor..CLASS II

TRANSFORMER

Single Stage with Two Transformers

Remove Jumper Wire

To Remote Temperature Sensor

between RH & RC

Jumper

{

B

O

Y

G RC RH C*

+

S

-

W

6

L

System

Blower/

Energized

Circula-

DC

DC

tor Fan

24 Volt

supply

Remote

Return

on call

Energiz-

Single

Energized

Energized

24 Volt

24 Volt

Com-

voltage

Temp-

to

Energized

Third wire

Diagnostic

Stage

in Heat,

in Cool

for Cool

ed on

(Hot)

(Hot)

mon

to re-

erature

Remote

on call for

for 3-wire

Indicator

(Com-

call for

(SS)

Off Mode

Mode

Cool

Heat

(option-

mote

Sensor

Temp-

Heat

zone valve

(See

pressor)

Heat or

al)

Temp-

signal

erature

Note 1 )

Cool

erature

Sensor

(if ELE

Sensor

is sel-

ected)

NEUTRAL

120VAC

24VAC

HOT

*Common connection required for fault or

HEATING

CLASS II

malfunction indication and remote sensor..

TRANSFORMER

NOTE: If continuous backlight or hardwired power input are desired but do not function in both HEAT and COOL modes, cut the heating transformer 24V wires and tape off.. Connect the neutral circuit disconnected from the heating transformer to the neutral circuit of the cooling transformer.. Discon- nect the wire to the RH terminal and install a jumper between RH and RC.. Depending on the system requirements, replace the cooling transformer with a 75VA class II transformer if needed..

NEUTRAL

24VAC 120VAC

HOT

COOLING

CLASS II

TRANSFORMER

Heat Pump Systems

To Remote Temperature Sensor

Jumper

{

B

O

Y

G RC RH C*

+

S

-

W

6

L

System

1st

Blower/

DC

DC

Auxil-

Power

Energiz-

Circula-

supply

Remote

Closed

Stage

Return

iary &

ed in

Energized

tor Fan

voltage

Conn-

Diagnostic

Heat

Heat/

in Cool

Heat

Energiz-

24 VAC

24 VAC

24 VAC

to re-

Temp-

to

Emer-

ection

Indicator

Pump 1

Emer-

& Off

& Cool

ed on

(Hot)

(Hot)

Common

mote

erature

Remote

gency

for

(See

(HP1)

gency

Mode

(Com-

call for

Cool

Heat

(optional)

Temp-

Sensor

Temp-

Heat

3-wire

Note ￿)

Comfort

Mode

pressor)

Heat or

erature

signal

erature

1st

zone

Alert II module

**

Cool

Sensor

Sensor

Stage

valve

or similar

malfunction

module

NEUTRAL

24VAC

HOT

*24 VAC common connection optional for system operation..

Required for fault or malfunction indi- cation, remote temperature sensor, or for continuous backlight operation..

**Dual fuel de-energizes

compressor when auxiliary heat is

energized..

120VAC

CLASS II

TRANSFORMER

NOTE ➀: Connection for Call for Service diagnostic indicator compatible with mechanical or electronic condenser control with Comfort AlertTM..3