Dometic Duo-Therm 59146 Installation & Operating Instructions Manual

R

Manual Compliments of

Northwest RV Supply

Printed From

http://www.nwrvsupply.com

RECORD THIS INFORMATION FOR FUTURE REFERENCE
BEFORE INSTALLING THE UNIT:

Model Number
Serial Number
Date Purchased
Place of Purchase

MODEL 59146

Roof-Top Heat Pump

USA

SERVICE OFFICE
The Dometic Corp.
509 So. Poplar St.
LaGrange, IN 46761
[phone]

CANADA

Dometic Dist.
866 Langs Dr.
Cambridge, Ontario
CANADA N3H 2N7
[phone]

For Service Center
Assistance Call:

800-544-4881

used with

Air Distribution Box Kit

THIS UNIT IS DESIGNED FOR OEM OR AFTER MARKET INSTALLATION

ALL INITIAL INSTALLATIONS MUST BE APPROVED BY THE SALES DEPT.

This unit must be serviced by an
authorized serviceman. Modifica­tion of the appliance can be
extremely hazardous and could
lead to serious injury or death.

637G

Cet appareil doit être réparé seule­ment par un réparateur autorisé.
Modification de l'appareil pourrait
être extrèmement dangereuse, et
pourrait causer mal ou mort.

®

®

CERTIFIED
LR 23565

INSTALLATION & OPERATING

INSTRUCTIONS

Form No. 3107882.007 8/97
©1997 The Dometic Corp.
LaGrange, IN 46761

MODEL

59146

1

1. GENERAL INFORMATION

Manual Compliments of

Northwest RV Supply

Printed From

http://www.nwrvsupply.com

A. The roof top heat pump was designed to operate

in a MILD GEOGRAPHICAL AREA for heating
where the heat loss is minimum. The Heat Pump
will operate down to an outside ambient tempera­ture of 40 degrees. At 40 degrees, the outdoor
thermostat will turn off the heat pump circuit. As
long as the temperature remains below 40 de­grees, the main furnace will heat your home. As the
outside temperature increases to 45 degrees, the
outdoor thermostat switches back to the heat
pump circuit.

The advantages of the Heat Pump Air Conditioner
are:

1) User friendly- only one unit for both heating and
cooling.

2) When used in mild climates where the outdoor
temperature range is 40 degrees or higher, an
L.P. furnace is not needed.

3) Heat pump heating uses the campsite electri­cal hookup; therefore, you save on trips to refill
L.P. tanks.

NOTE: Geographical location usage should be

determined before omitting a central fur­nace.

SPECIFICATIONS

MODEL NO. 59146

Nominal Capacity (BTU/HR) 15,000
Electrical Rating 115 VAC, 60 Hz., 1 PH.
Compressor Rated Load Amps 12.9
Fan Motor Rated Load Amps 2.5
Compressor Locked Rotor Amps 71.0
Fan Motor Locked Rotor Amps 12.8
Power, Cooling (KW) 1.95
SCFM-High Speed Max./Min. 450/300
Refrigerant (R22) oz. 34.5

Minimum Wire Size * 12 AWG Copper Up to 24 ft.
Circuit Protection 20 Amp Time Delay Fuse or

Installed Weight (Pounds) 110
Minimum Generator 1 Unit 3.5 KW
Size ** 2 Units 5.0 KW

For distances over 24 ft. consult the National Electrical Code.

*

The Dometic Corporation gives GENERAL guidelines for generator requirements.

**

These guidelines come from experiences people have had in actual applications.
When sizing the generator, the total power usage must be considered. Also keep in
mind generators lose power at high altitudes and from lack of maintenance.

HACR Circuit Breaker

B. This air conditioner is designed for:

1) Installation on a recreational vehicle at the time the
vehicle is manufactured or aftermarket installations.

2) Mounting on the roof of a recreational vehicle.

3) Connection to an air distribution box system.

4) Roof construction with rafters/joists on minimum of
16 inch centers.

5) Minimum of 1.75 inches and maximum of 4.50 inches
distance between roof to ceiling of recreational ve­hicle. Alternate installation methods will allow for
roofs more than 4.50 inches thick.

6) Read installation and operating instructions care-

fully before starting your air conditioner
installation.

7) The Dometic Corporation will not be liable for any
damages or injury incurred due to failure in following
these instructions.

8) Installation must comply with the National Electrical
Code and any State or Local Codes or regulations.

9) DO NOT add any devices or accessories to this air
conditioner except those specifically authorized by
Dometic.

10) This equipment must be serviced by qualified

personnel and some states require these people
to be licensed.

2. OPERATING INSTRUCTIONS

A. CONTROLS:

1) The Selector Switch controls fan speed, heating
mode, and cooling modes.

2) The thermostat controls the compressor ON/OFF
operation in a temperature range of 65° to 90°F.

B. COOLING OPERATION:

1) Set the thermostat at the desired temperature
level.

2) Select the fan speed that best satisfies your needs:
a) HIGH COOL: Selected when maximum cool-

ing and dehumidification required.

b) LOW COOL: Selected when room at desired

comfort level and needs to be maintained.
Normally this speed used for night time opera­tion.

2

NOTE: The blower runs continuously to circulate air and

Manual Compliments of

Northwest RV Supply

Printed From

http://www.nwrvsupply.com

maintain an even temperature. The compressor will
come on as cooling is required to maintain the se­lected temperature level.

AFTER SHUTTING THE AIR CONDITIONER DOWN
WITH EITHER SELECTOR SWITCH OR THERMO­STAT, WAIT AT LEAST TWO (2) MINUTES BE­FORE RESTARTING. THIS ALLOWS THE RE­FRIGERANT PRESSURE TO EQUALIZE AND COM­PRESSOR TO RESTART EASILY. FAILURE TO
FOLLOW THIS INSTRUCTION MAY CAUSE CIR­CUIT BREAKER OR FUSE TO OPEN.

C. FAN OPERATION:

This will circulate the air in your RV without cooling or
heating. There are two positions: HIGH FAN or LOW
FAN to select from, depending upon personal choice
and model.

D. HEATING OPERATION:

NOTE: The heat pump will not replace a furnace for
heating your RV in cold weather. The intent is to
warm the coach during mild winter weather.

1) Turn the selector switch to:
a) High heat
b) Low heat

2) Set the thermostat to your comfort level.

3) The fan and compressor will come on and begin
heating.

4) When the desired temperature level is reached,
the compressor will cycle as required to main­tain selected temperature. The blower will run
continuously to circulate air and maintain an
even temperature.

E. "OFF" POSITION: This is to turn Unit off.

Air conditioners have a greater tendency to frost when
the outside temperature is relatively low. This may be
prevented by adjusting the thermostat control knob to
a warmer setting (counter clockwise). Should frosting
continue, operate on HIGH FAN setting until the
cooling coil is free of frost.

4. REDUCING HEAT GAIN

The ability of the air conditioner 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 improve its ability to maintain the

desired indoor temperature.

NOTE

The manufacturer of this air conditioner will not be

responsible for damage caused by condensed mois-

ture on ceilings or other surfaces. Air contains mois-

ture and this moisture tends to condense on cold

surfaces. When air enters the RV, condensed mois-

ture may appear on the ceiling, windows, metal parts,

etc. The air conditioner removes this moisture from

the air during normal operation. Keeping doors and

windows closed when this air conditioner is in opera-

tion will minimize condensed moisture on cold sur-

faces.

3. MAINTENANCE

A. AIR FILTER:

Periodically remove the return air filter located above
the removable panel in the air box. Wash the filter with
soap and warm water, let dry and the reinstall.

NOTE: Never run the air conditioner without return air
filter in place. This may plug the unit evaporator coil
with dirt and may substantially affect the performance
of the unit.

B. AIR BOX HOUSING:

Clean air box housing and control panel with a soft
cloth dampened with a mild detergent. Never use
furniture polish or scouring powders.

C. FAN MOTOR:

D. FROST FORMATION ON COOLING COIL:

Factory lubricated and requires no service under
normal use.

Under certain conditions, frost may form on the evapo­rator coil. If this should occur, inspect the filter and
clean if dirty. Make sure air louvers are not obstructed.

5. SERVICE - Unit Does Not Operate

If your unit fails to operate or operated improperly,

check the following before calling your service center.
A. If RV connected to motor generator, check to be sure

motor generator is running and producing power.
B. If RV connected to power supply by a land line, check

to be sure line is sized properly to run air conditioner

load and it is plugged into power supply.
C. Check your fuse or circuit breaker to see if it is open.
D. After the above checks, call your local service center

for further help. This unit must serviced by qualified

service personnel only.

When calling for service, always give the following:

1. Air Conditioner Model and Serial Number found

on rating plate located on base pan of air condi­tioner bottom.

2. Air Distribution Box Kit Part and Serial Number

found on rating plate located on ceiling template.
Observe this rating plate through the air discharge
louver of Air Distribution Box.

3