Operating instructions

ManualsBrandsDometic ManualsHeat Pump630025

The refrigerant cycle starts at the compressor. Its

function is to take the low pressure R22 vapor and dis-

charge it as high pressure vapor. As the refrigerant (R22)

is compressed, it gives off heat causing the discharge line

to be quite warm to the touch.

The R22 high pressure vapor leaves the compressor

through the discharge line and enters the reversing valve.

The reversing valve routes the high pressure vapor to the

inside coil. In the heating mode the inside coil is a con-

denser coil.

The high pressure R22 vapor enters the inside coil

(condenser). Here it is cooled and condensed into liquid

R22 by passing through the coil. The heat removed from

the refrigerant is expelled to the inside air. The refrigerant

leaves the inside coil as high pressure liquid.

As the high pressure liquid R22 leaves the inside coil

(condenser) it passes through the small capillary tube or

tubes. This is the metering or flow control device in the

sealed system. It determines the amount and force of

which the R22 enters the outside coil.

It is imperative that the capillary tube's length and

diameter not be altered. If the tube is altered, the unit will

not operate as efficiently as it should.

The high pressure liquid R22 enters the outside coil in

a controlled amount from the capillary tube. When the liquid

enters the low pressure atmosphere of the outside coil

(evaporator) it evaporates into vapor. When the evapora-

tive process takes place, heat is removed from the air

flowing through the outside coil (evaporator). The air with

the heat removed is returned to the outside air (ambient) via

the air movement system (blower assembly).

From the outside coil (evaporator), the low pressure

refrigerant (R22) vapor returns to the reversing valve. The

reversing valve routes the low pressure vapor to the

compressor through the suction line to start the heating

process again.

3E. GENERAL INFORMATION

The roof-top heat pump was designed to operate in a MILD

GEOGRAPHICAL AREA for heating where the heat loss is

minimal. The heat pump was designed to operate down to

an outside ambient temperature of 40°F. At 40°F., the

outdoor thermostat will turn off the heat pump circuit and

start up the coach's main furnace. As long as the tempera-

ture remains below 40 degrees, the main furnace will heat

your home. As the outside temperature increases to 45°F.,

the outdoor thermostat switches back to the heat pump

circuit.

NOTENOTE

NOTE: Model 59126.501 does not have an outdoor ther-

mostat. When outdoor temperature is at or below 40°F.,

use the main furnace to heat your home.

The advantages of the heat pump are:

1. User friendly; only one unit for both heating and

cooling;

2. Heat pump heating uses campsite electrical hookup

and saves on trips to refill L.P. tanks;

3. When used in mild climates where the outdoor

temperature range is 40 degrees or higher, an LP

furnace is not needed.

NOTENOTE

NOTE: Geographical location usage should be determined

before omitting a central furnace.

TO MAINTAIN DESIRED TEMPERATURETO MAINTAIN DESIRED TEMPERATURE

TO MAINTAIN DESIRED TEMPERATURE:

The ability of the air conditioner mode to maintain the

desired inside temperature depends on the heat gain of the

RV. Some preventative measures taken by the occupants

of the RV can reduce the heat gain and improve the

performance of the air conditioner. During extremely high

outdoor temperatures, the heat gain of the vehicle may be

reduced by:

a. Parking the RV in a shaded area

b. Using window shades (blinds and/or curtains)

c. Keeping windows and doors shut or minimizing usage

d. Avoiding the use of heat producing appliances

Starting the air conditioner early in the morning and giving

it a "head start" on the expected high outdoor ambient will

greatly improved its ability to maintain the desired indoor

temperature.

NOTE

The manufacturer of this heat pump will not be responsible

for damage caused by condensed moisture on ceilings or

other surfaces. Air contains moisture and this moisture

tends to condense on cold surfaces. When air enters the

RV, condensed moisture may appear on the ceiling, win-

dows, metal parts, etc. The heat pump removes this

moisture from the air during normal operation. Keeping

doors and windows closed when this heat pump is in

operation will minimize condensed moisture on cold sur-

faces.

Operating instructions can change from one model to

another.

Be sure you are familiar with the proper operating instruc-

tions for the specific model of heat pump you are diagnos-

ing. An installation and operating manual is packaged with

each heat pump system.