Operating instructions

ManualsBrandsDometic ManualsHeat Pump630025

Be sure to check the switch in all positions and be sure you

have continuity only on the terminals for the selected

position. Lack of continuity or continuity on incorrect termi-

nals designates a defective switch, and it must be replaced.

POSITION TERMINALS

OFF

1st HIGH FAN L1 and 1

2nd HIGH FAN L1 and 2

LOW FAN L1 and 4

1st HIGH COOLING L1 and H; L1 and 1

2nd HIGH COOLING L1 and H; L1 and 2

LOW COOLING L1 and H; L1 and 4

1st HIGH HEATING L1 and C; L1 and 1

2nd HIGH HEATING L1 and C; L1 and 2

LOW HEATING L1 and C; L1 and 4

BACK VIEW OF TYPICAL SELECTOR SWITCHBACK VIEW OF TYPICAL SELECTOR SWITCH

BACK VIEW OF TYPICAL SELECTOR SWITCH

NOTE: Numbers without circles are the white ink stamped numbers.NOTE: Numbers without circles are the white ink stamped numbers.

NOTE: Numbers without circles are the white ink stamped numbers.

9E. THERMOSTAT

There are three types of thermostats used on heat pump

units. Each type is explained in this section.

A.A.

MECHANICALMECHANICAL

MECHANICAL

This type is used on the

mechanical series of heat

pumps. The thermostat

controls the ON/OFF cy-

cling of the compressor. It

has three terminals. The air

temperature around the

sensor tube should be be-

tween approximate 65°F.

and 90°F. To check the ther-

mostat for operation, turn

the heat pump circuit

breaker off, and disconnect the wires to the thermo-

stat. Turn the control knob to COOLER. You should have

continuity between Terminals 2 to 3 and

nono

no continuity

between Terminals 2 to 1. Turn the thermostat to

WARMER. You should

notnot

not have continuity between Ter-

minals 2 to 3; and have continuity between Terminals 2

to 1. If you have incorrect readings, replace the ther-

mostat. If you have the readings as indicated above,

DO NOT replace the thermostat.

B.B.

DIGITDIGIT

DIGIT

ALAL

This thermostat is designed to operate 12V DC single-

stage heat pump and an independent single-stage aux-

iliary heat system. It is a manual changeover thermo-

stat between heating, cooling and auxiliary heat. It also

incorporates time delay circuitry to protect against sys-

tem short cycling.

There is a time delay of approximately three min-

utes between OFF and ON cycles.

Default temperatures of 65°F. for Heat and 75°F. for

Cool have been incorporated into this thermostat. If the

thermostat is without power for 10 to 15 seconds, it will

default to these temperatures.

Operating temperatures for both heating and cool-

ing systems are changeable to suit the comfort needs

of the occupants.

This thermostat is used as a remote wall mounted

thermostat. The heat pump can have an air distribution

box or a ducted system. To check the operation, refer

to Section 1.2.

Next, verify the wiring to the thermostat is correct.

Thermostat Thermostat

Thermostat

Wiring fWiring f

Wiring f

or DIGITor DIGIT

or DIGIT

AL AL

Thermostat:Thermostat:

Thermostat:

Route the

(10) conductor cable from the 14" x 14" opening to the

thermostat location. Route a two conductor cable from

the coach's 12 volt DC power source to the thermostat

location. Connect 12 volt

positivepositive

positive lead to the green

wire on the thermostat cable.

Connect the 12 DC volt

negativenegative

negative lead to the brown

lead. Secure both connections using wire nuts.

NOTE: The DC volt connections are needed to power

the liquid crystal display (LCD) and thermostat in the

AUX. HEAT mode when 115 volt AC is not available.

At the thermostat location, leave about six (6") inches

of cable extending through the wall. Plug the thermo-

stat cable into the thermostat connector.

When an auxiliary furnace is used with the heat

pump, a single-wire conductor must be routed from

the furnace to the thermostat location. Connect this wire

from the furnace to the violet pigtail at the thermostat

and secure with wire nut. Tuck the excess wire back

into the wall and fill opening with insulation to prevent

drafts that could affect the thermostat operation. Using

the two screws provided, secure the thermostat to the

wall.

THERMOSTAT CONNECTIONSTHERMOSTAT CONNECTIONS

THERMOSTAT CONNECTIONS