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Manual Emerson 1F85CA-0471 Thermostat

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Manual

WIRING DIAGRAMS

Heat Pump Connections

If you do not have a heat pump system, refer to ﬁ gures 4-6.

Refer to equipment manufacturers’ instructions for speciﬁ c

system wiring information.

You can conﬁ gure the thermostat for use with the following

heat pump systems.

Figure 3 – Heat Pump Systems

HEAT PUMP TYPE 1 (HP 1). Single stage compressor

system; gas or electric backup.

HEAT PUMP TYPE 2 (HP 2). Multi-stage compressor or two

compressor system with gas or electric backup.

After wiring, see INSTALLER CONFIGURATION section for

proper thermostat conﬁ guration.

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.

Heat Pump 2

(HP2)

Heat Pump 1

(HP1)

Energized in

Cool Mode

Energized in

Heat, Off,

Emergency

Mode

2nd

Stage

(Com-

pressor)

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

Heat Mode

3rd 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

W/E

CLASS II

TRANSFORMER

HOT

24VAC

NEUTRAL

120VAC

24 Volt

(Hot)

Heat

Jumper

Comfort Alert II Module

or Similar System

Malfunction Module

O/B

Single Stage and Multi-Stage Connections

Refer to equipment manufacturers’ instructions for speciﬁ c

system wiring information.

This thermostat is designed to operate a single-transformer

or two-transformer system.

You can conﬁ gure the thermostat for use with the following

fossil fuel 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 conﬁ guration.

Figure 4 – Single Stage or Multi-Stage System (No Heat Pump) with Single Transformer

* Common connection

required for fault or

malfunction indication.

Single

Stage 1

(SS1)

Multi-

Stage 2

(MS2)

Energized Constantly

in Cool Mode

Energized Constantly

in Heat, Off,

Emergency

Mode

Output

Cool

Mode

2nd

Stage

Cool Mode

1st Stage

Blower/

Circulator

Fan Energized

on Call for

Cool (and

Heat if

configured

for Electric

Heat)

No Output

Heat Mode

2nd Stage

Heat

Mode

1st Stage

Optional*

24 Volt

(Com-

mon)

24 Volt

(Hot)

Cool

System

W/E

CLASS II

TRANSFORMER

HOT

24VAC

NEUTRAL

120VAC

24 Volt

(Hot)

Heat

Jumper

Fault

Indicator

System

Malfunction

Switch

Comfort Alert II Module

or Similar System

Malfunction Module

O/B

Figure 5 – Single Stage or Multi-Stage System (No Heat Pump) with Two Transformers

Single

Stage 1

(SS1)

Multi-

Stage 2

(MS2)

Output

Cool

Mode

2nd

Stage

Cool Mode

1st Stage

Blower/

Circulator

Fan Energized

on Call for

Cool (and

Heat if

configured

for Electric

Heat)

No Output

Heat Mode

2nd Stage

Heat

Mode

1st Stage

Optional

24 Volt

(Com-

mon)

Fault

Indicator

(NOT

USED)

24 Volt

(Hot)

Cool

System

W/E

CLASS II

TRANSFORMER

HOT

24VAC

NEUTRAL

120VAC

24 Volt

(Hot)

Heat

120VAC

Remove Jumper Wire

between RH & RC

HOT

24VAC

NEUTRAL

CLASS II

TRANSFORMER

HEATING

COOLING

Jumper

O/B

Energized Constantly

in Cool Mode

Energized Constantly

in Heat, Off,

Emergency

Mode

Single Stage

3-wire

Zone Valve

application

Blower/Circulator

Fan Energized

Opens

Valve

(4)

Constant

24 Volt

(Com-

mon)

24 Volt

(Hot)

Cool

System

CLASS II

TRANSFORMER

HOT

24VAC

NEUTRAL

120VAC

24 Volt

(Hot)

Heat

(5)

Jumper

Closes

Valve

(6)

Figure 6 – 3-Wire (SPDT) Heat Only Zone Valve Wiring

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Specifications

Brand	Emerson
Model	1F85CA-0471
Category	Thermostats
File type	PDF
File size	1.31 MB

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Frequently Asked Questions about Emerson 1F85CA-0471 Thermostat

Our support team searches for useful product information and answers to frequently asked questions. If you find an inaccuracy in our frequently asked questions, please let us know by using our contact form.

What is the dead zone of a thermostat? Verified

Many modern thermostats have a dead zone. If the temperature deviates less than 4°C from the set temperature, the system will not heat or cool. This so called dead zone of the thermostat prevents the system from turning on and off too often, saving energy.

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What is the best place to mount a thermostat? Verified

The best place for a thermostat is approximately 1,5 meter above the ground. Never place the thermostat nead a radiator or other heat emitting equipment or in direct sunlight. Choose a room that is used often. In most cases this is the living room.

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