Operating instructions

ManualsBrandsDometic ManualsHeat Pump630025

B.B.

MODELS 39025.502, 39035.601, 39045.601 &MODELS 39025.502, 39035.601, 39045.601 &

MODELS 39025.502, 39035.601, 39045.601 &

39045.61639045.616

39045.616

The thermostat is a 24V AC controlled system and is a

bimetal type. It has two switches on the face of the

thermostat. On the left side there is a SYSTEM switch and

on the right side there is a FAN switch. This thermostat will

operate an air conditioner and a furnace.

Verify the thermostat wiring is correct.

A three-conductor cable 18 to 22 AWG is to be used for low

voltage connections. Route low voltage cable from thermo-

stat to unit electrical box. Use .50 dia. snap-bushing for

routing cable into electrical box.

Connect

R from thermostat to red wire in control compart-

ment. Connect

G or

F from thermostat to blue wire in control

box. Connect Y from thermostat to yellow wire in control

box. Use wire nuts to ensure good connections.

When connecting a gas furnace to Dometic's Heat/Cool

thermostat, the

W and

R terminals are used. This means

there will be two wires on the

R terminal (one wire from the

furnace and one wire from the air conditioner).

To check the thermostat, remove all wires. Next, using an

ohm meter with the SYSTEM switch in COOL position and

the FAN switch in AUTO position and the room temperature

above the setpoint temperature, continuity should exist

between

R to

Y and

R to

G. No continuity should exist

between

R to

W. With room temperature below setpoint

temperature, no continuity should exist between

R to

W and

R to

G. With the FAN switch to ON position and

the room temperature above the set point temperature

continuity should exist between

R to

Y and

R to

G. No

continuity should exist between

R to

W. With the room

temperature below the set point temperature, continuity

should exist between R to G and no continuity between R

to Y and R to W.

With the SYSTEM switch in OFF position and the FAN

switch in AUTO position, no continuity should exist

R to Y,

R to

G and

R to

W. With the FAN switch to ON position,

continuity should exist between

R to

G and no continuity

between

R to

Y and

R to

W regardless of room tempera-

ture.

With the SYSTEM switch in HEAT position, FAN switch in

AUTO and room temperature above setpoint temperature,

no continuity should exist between

R to

G and

R to

W. With room temperature below set point temperature,

continuity should exist between

R to

W and no continuity

between

R to

Y and

R to

G. With the FAN switch to ON,

continuity should exist between

R to

G regardless of room

temperature.

To check ACTIVE terminals, place one lead from the ohm

meter to the

R terminal and the other lead from the meter

to the ACTIVE (ON) terminal.

SWITCHSWITCH

SWITCH

COMBINATIONCOMBINATION

COMBINATION

IF ROOM TEMP.IF ROOM TEMP.

IF ROOM TEMP.

IS ABOVE/BELOWIS ABOVE/BELOW

IS ABOVE/BELOW

SetpointSetpoint

Setpoint

TEMP.:TEMP.:

TEMP.:

ABOVEABOVE

ABOVE

BELOWBELOW

BELOW

ABOVEABOVE

ABOVE

BELOWBELOW

BELOW

AUTOAUTO

AUTO

ONON

FANFAN

FAN

SWITCHSWITCH

SWITCH

G YG Y

G Y

W W

TERMINALS THATTERMINALS THAT

TERMINALS THAT

ARE "ON"ARE "ON"

ARE "ON"

COOLCOOL

COOL

OFFOFF

OFF

AUTOAUTO

AUTO

ONON

HEAHEA

HEA

ABOVEABOVE

ABOVE

BELOWBELOW

BELOW

ABOVEABOVE

ABOVE

BELOWBELOW

BELOW

AUTOAUTO

AUTO

ONON

ABOVEABOVE

ABOVE

BELOWBELOW

BELOW

ABOVEABOVE

ABOVE

BELOWBELOW

BELOW

SYSTEMSYSTEM

SYSTEM

SWITCHSWITCH

SWITCH