Dometic RM36O, RM360, RM660, RM460, RM760 Service Manual

United States

SALES OFFICES
DOMETIC SALES CORP.

2320 Industrial Pkwy.

Elkhart, IN 46515
Phone [phone]

DOMETIC SALES CORP.
14441 Bonelli St.

City of industry, CA 91746
Phone

818-968-9431

DOMETIC SALES CORP.
1625-A Rock Mountain Blvd.

Stone Mountain, GA 30083
Phone [phone]

DOMETIC SALES CORP.
7895 SW. Hunziker Rd.

Portland, OR 97223
Phone [phone]

DOMETIC SALES CORP.

2920 Avenue

“E”

East

Alington,

TX 76011

-Phone

817-277-72 1

DOMETIC SALES CORP.
East Oak Ridge Dr.

Rt. 9, Box I7 A

Hagerstown, MD 21740

Phone [phone]

Canada

Euroclean Canada Inc.

Dometic Recreation Division
866 Langs Drive
Cambridge, Ontario
N3H

2N7 Canada

[phone]

Edition

1

Publication

No.

5415-E I Service

DSC

#650

etic

1

1

RM360

RM460

”

1000 01

RM660

RM760

REFRIGERATOR

,

RM360

SERVICE MANUAL

RM460

RM660

-1

RM760

2

Installation

page 3

Instructions for use

page 6

Cabinet adjustments

To change door panel

page 8
page 8

Panel dimensions

page 8

Replacement of door gasket

page

9

Reversing outer door

page

9

Replacement of evaporator door
on

RM360/460/660

page

9

Replacement of evaporator door
gasket on

RM360/460/660

page 10
The absorption cooling unit page 10
Operation analysis for cooling unit page 10
Cooling unit replacement

RM360/460/660 page 11

Cooling unit replacement

RM760

page 12
The gas/electric equipment

page 13

Replacement of gas/electric
equipment complete

page 14

Disassembly of gas/electric equipment page 14
Disassembly of burner jet and burner page 15
Operation analysis for LP gas refrigerators

-page 15

Operation analysis for refrigerators
operating on electricity page 16

Wiring diagrams page 17-18

3

INSTALLATION

ELECTRICAL CONNECTION

GENERAL INSTRUCTIONS

115 Volts A C

The refrigerators outlined hereon have been de­sign certified under ANS

Z

21.19 Refrigerators

by the American Gas Association for installation

in a mobile home or recreational vehicle and are

approved by the Canadian Gas Association.

The
certifications are, however, contingent on the
installation being made in accordance with the
following instructions.

The installation must in the USA conform with:

The refrigerator is equipped with a three
prong (grounded) plug for protection against

shock hazard and should be plugged directly
into a properly grounded three prong recept­acle. Do not cut or remove the grounding
prong from this plug. The cord should be
routed to avoid coming in contact with the
burner cover, flue cover or other hot com­ponents.

12 Volts VDC optional for certain models

1. National Fuel Gas Code

Z223.1-1974

2.

Mobile Homes

A119.1-1972

3. Recreational Vehicles

A119.2-1970

The unit must be electrically grounded in accor­dance with the National Electrical Code ANSI,

CI­1968, when installed if an external alternating
current electrical source is utilized.

4. Any applicable local code

On

"Tri-Pover"

units there is an additional
terminal block marked "12 V". The refrigera­tor must be connected to the battery circuit
with two wires of adequate capacity to avoid
voltage drop. The wire gage should be chosen

with consideration to the wire length in

accordance with the following tabel: The 12 V
circuit must be fused with an appropriate
fuse.

In Canada

TABLE

1. Standard CGA

lO.l/CSA

2240.4 gas equipped

mobile housing and recreational vehicles

2. Standard CSA

Z240.6.1

electrical requirements

Maximum two conductor wire length for different
AWG numbers.

for mobile housing

Maximum two conductor wire length in feet

3. Standard CSA

Z240.6.2/C22.2

No 148 electrical

requirements for recreational vehicles

AWG

Ventilation

The installation shall be made in such a manner
as to separate the combustion system from the
living space of the mobile home or recreational

vehicle. Openings for air supply or for venting

of combustion products shall have a minimum di­mension of not less than

l/4

inch.

14

10

12

17

10

27

8

43

6

69

4

110

Proper installation requires one lower fresh air
intake and one upper exhaust vent. The ventila­tion kits shown in this instruction booklet have
been certified for use with the refrigerator mo­dels listed in the tables. The ventilation kits

must be installed and used without modification.

An opening towards the outside at floor level in
the refrigerator compartment must be provided for
ventilation of heavier-than-air fuel gases. The

lower vent of the recommended kits is provided
with proper size opening.
For ready serviceability of the burner and con-

trol manifold parts of the refrigerator the lower

side vent is fitted with a lift-out panel which
provides an adequate access opening.

Do not use the body or chassis of the

vehicle as a substitute for either of the two
conductors. No other electrical equipment
or lighting should be connected to the re­frigerator circuit. The refrigerator will draw
from

l0-21

Amps at 12 Volt depending on model.

CAUTION
Do not operate the refrigerator on 12 Volt when

the vehicle is parked. You will run out of
battery in a rather short time.

GAS CONNECTION

Hook-up to the gas supply line is accomplish-

ed at the manual gas valve, which is furnish-

ed with a

3/8"

SAE (UNF

5/8"-18)

male flare

connection.

All completed connections should
be checked for leaks with soapy water.
The gas supply system must incorporate a
pressure regulator to maintain a supply

pres-

sure of

not more than 11 inches water gage.

Fig.1

m

RM360

120w

RM460 RM660 RM760

135w

175w 250W

9

7

5

15

12 8

25

19

13

40

31 22

64

49

34

102

79

55

4

If possible the installation of a 12 Volt
operated refrigerator should be completed with
a relay mounted either in the car or in the
recreational vehicle (see Fig. 1). This relay
will automatically cut out the refrigerator
when the car motor is stopped.

SPECIAL HINTS

The refrigerator must be installed in a

sub-

stantial

enclosure and must be level. A spirit
level is supplied with each refrigerator and
by placing it in the freezer compartment one
can level the refrigerator both ways front to

back and side to side. When installing the re-

frigerator in the enclosure care should be

taken to ensure a complete sealing between the

/

front frame of the refrigerator and the top,
sides and bottom of the enclosure. For this

purpose a length of sealing strip is applied

l-l _.

to the rear surfaces of the front frame.

A sealing strip should also be applied to the

foremost floor of the enclosure as shown in
Fig. 2.

Be careful not to damage the sealing strip
applied to the floor of the enclosure when the
refrigerator must be blocked. The heat produced
at the rear of the refrigerator will otherwise
become trapped in this space making the top of

the refrigerator hot and reducing the effi-

ciency of the refrigerator.

CERTIFIED INSTALLATION

Certified installations require one roof vent
and one lower side vent or as optional one
upper vent and one lower side vent. The two
alternatives are provided for by using the
different kits listed in the Appendix.

For further information contact your dealer
or distributor.

METHODS OF INSTALLATION

The methods of installation are shown in

figures 3 and 4. It is essential that all
maximum or minimum dimensions are strictly
maintained as the performance of the refrige-

rator is dependent on an adequate flow of

air over the rear of the refrigerator.

VENTILATION HEIGHTS

Refrige-

rator

Minimum ventilation heights in inches

:.jiiGj

RM360

37

31

RM460

34

RM660

42

RM760

56

Minimum

w

ventilation
height

Fig.3

Ventilation

area

5"x

18”

5

CLEARANCES

Minimum clearances in inches to combustible
materials are:

G:

Top 0

K:

Side 0

L:

Bottom 0

M:

Rear 1

Clearance M between the rear-most part of the
refrigerator and the wall behind the refrige­rator.
Clearance N on top of the condenser is related

to the minimum ventilation height.

See Fig. 5 and examples below.

Fig.5

MEASUREMENTS

Distance

Refrigerator Overall

Installation

Recess

between top

dimensions

dimensions

dimensions

of condenser

model

to top of

Height Width Depth

Height

Width Depth

Height Width

Depth

refrigerator

A

B

C

h

W

d

H

W

D

e

RM360

30

3/8

21

11/166221/16

29

9/16

20

1/4 203/166

29

3/4 201/2

21

3/16 11/4

RM460

32

15/166

23 24

11/166

32

1/8

21

9/16 223/4

32

5/1662113/166

23

3/4 11/4

RM660

40

13/166

23 24

11/166

40 21

9/16 223/4

40

3/1662113/166

23

3/4 11/4

RM760

52

23 24

11/16

51

3/16

21

9/16 223/4

51

3/8 2113/166

23

3/4

1/8

Storane volumes

Refrigerator Total storage volume in cu ft
model

RM360

3.0

RM460

3.9

RM660

5.1

RM760

6.0

EXAMPLES

The clearance N for the

RM360

model is derived

in the following way:

at

A.

Installation with upper and lower side vents.

N=Minimum ventilation height 37 minus in-

stallation height 29

9/16

plus distance

between condenser top and refrigerator top

1

l/4

N=37-29 9/16+1 l/4=8 11/16.

B.

Installation with roof vent and lower side

vent.

N=Minimum ventilation height 31 minus in-

stallation height 29

9/16

plus distance

between condenser top and refrigerator top

1

l/4

plus distance between roof surface

and roof vent cap 5

l/4.

N=31-29 9/16+1 l/4+5 l/4=7 15/16.

Fig.6

6

INSTRUCTIONS FOR USE

INSTALLATION OF THE REFRIGERATOR IN A VEHICLE

The refrigerator must be installed on a solid
floor and must be level. With the vehicle care­fully leveled the refrigerator should level both

ways in the freezer compartment.
Free air circulation over the fins of the cooling
unit is essential.

Clearances around the refrige­rator should be in accordance with the label
attached to the rear plate of the refrigerator.
In case detailed instructions on the installation
and connection to the gas supply are required,
contact your dealer or distributor.

Leveling

In the boiler ammonia vapor is distilled from an
ammonia-water mixture and carried to the finned
condenser,

where it liquifies. The liquid flows
to the evaporator, where it creates cold by
evaporating into a circulating flow of hydrogen
gas.

If the evaporator coil is not level the

liquid readily accumulates, forming pockets

which

can impair the gas circulation or even

block it,

in which case, of course, the cooling
will stop.
When the recreational vehicle is stationary it
must be leveled to be comfortable to live in. If

the refrigerator is properly installed, i e the
freezer shelf parallel to the floor, the refrige­rator will then also perform well.

A bubble level should be placed on the freezer

shelf. When the vehicle is on tow, the continuous
rolling and pitching movement will not affect
the refrigerator as long as the movement passes

either side of level, but when the trailer is

temporarily parked this sensitivity of the re­frigerator should be remembered. So, once more,
before you start the refrigerator, make sure

it is level.

HOW TO START THE

REFRIGERATOR.

4.

After the gas is lit keep the button C pushed

for 10 seconds. Release the button and check
through the reflector that the burner flame
stays burning. If not repeat the lighting pro­cedure.

NOTE:

After a replacement of the gas con-

tainer or a long shut off period the gas
line is likely to be filled with air. In
such a case the lighting procedure has
to be repeated until the air is pushed

out of the line and the gas has reached

the burner.

Flame Blow Out

If trouble is encountered with the flame blowing
out under specially windy conditions, try to
avoid the wind blowing against the wall where
vent outlets are located. If the trouble persists,
set the thermostat to MAX. This later measure
can of course only be temporary such as when the
vehicle is on tow, for after a day or so at this
setting the foodstuffs in the cabinet will freeze.

Electric Operation (Fig. 7)

1.

2.

3.

Check that the attachment plug is correctly
connected to the mains supply. When the re-

frigerator is equipped also for 12 Volts D C
operation the low voltage connection is made
at the marked terminals at the rear of the re-

frigerator.
Turn the knob A to desired position for electric
operation.
Turn the thermostat knob B to setting 4.

HOW TO USE THE REFRIGERATOR

Food Storage Compartment

The food storage compartment is completely closed
and unventilated,which is necessary to maintain
the required low temperature for food storage.
Consequently foods having a strong odor or liable
to absorb odors should be covered. Vegetables,
salads etc.

should be covered to retain their

crispness.

The coldest positions in the refrige­rators are underneath the cooling evaporator and
at the bottom of the refrigerator, and the least
cold positions are on the upper door shelves. This

should be considered when different types of food

are placed in the refrigerator.

Frozen Food Storage Compartment

Fig.7

Gas Operation(Fig.

7)

The ice trays should be placed in direct contact
with the freezer shelf for fastest ice making.
Quick frozen soft fruits and ice cream should be
placed in the coldest part of the compartment,

1. To start
position

2. Turn the

3. Push the
D of the
repeated
This can

the refrigerator turn the knob A to
"GAS".
thermostat knob B to setting 4.
button C to stop and push the button
piezo igniter. The pushing has to be
until the gas is lit at the burner.
be observed through the reflector E.

precooled

in the refrigerator, can however, also

which is at the bottom of the aluminum liner or,

in models with a shelf, on this or just below it.
Frozen vegetables, on the other hand, may be
stored in any part of the compartment.
The compartment is not designed for the deep or
quick freezing of foodstuffs. Meat or fish foods,
whether raw or prepared, and provided they are