Dometic RM760, RM60, RM460 User Manual

Diagnostic Service Manuals

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]

etic

1

1

DOMETIC SALES CORP.

2920 Avenue

Alington,

-Phone

DOMETIC SALES CORP.
East Oak Ridge Dr.

Rt. 9, Box I7 A

Hagerstown, MD 21740

Phone [phone]

“E”

East

TX 76011

817-277-72 1

Canada

Euroclean Canada Inc.

Dometic Recreation Division
866 Langs Drive
Cambridge, Ontario
N3H

2N7 Canada

[phone]

”

1000 01

RM360

RM460

RM660

RM760

REFRIGERATOR

,

RM360
RM460

SERVICE MANUAL

RM660

Edition

Publication
5415-E I Service

DSC

#650

1

No.

-1

RM760

2

Installation
Instructions for use
Cabinet adjustments

To change door panel
Panel dimensions
Replacement of door gasket
Reversing outer door
Replacement of evaporator door

on

RM360/460/660

Replacement of evaporator door

gasket on
The absorption cooling unit page 10
Operation analysis for cooling unit page 10
Cooling unit replacement
Cooling unit replacement
The gas/electric equipment

Replacement of gas/electric

equipment complete

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

operating on electricity page 16
Wiring diagrams page 17-18

RM360/460/660

RM360/460/660 page 11

RM760

-page 15

page 3
page 6
page 8
page 8
page 8
page
page

page

page 10

page 12
page 13

page 14

9
9

9

3

INSTALLATION
GENERAL INSTRUCTIONS
The refrigerators outlined hereon have been de-

sign certified under ANS
by the American Gas Association for installation

in a mobile home or recreational vehicle and are
approved by the Canadian Gas Association.
certifications are, however, contingent on the
installation being made in accordance with the
following instructions.

The installation must in the USA conform with:

1. National Fuel Gas Code

2.

Mobile Homes

3. Recreational Vehicles
The unit must be electrically grounded in accor-

dance with the National Electrical Code ANSI,

1968, when installed if an external alternating

current electrical source is utilized.

4. Any applicable local code

In Canada

1. Standard CGA
mobile housing and recreational vehicles

2. Standard CSA

for mobile housing

3. Standard CSA

requirements for recreational vehicles

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

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.

A119.1-1972

lO.l/CSA
Z240.6.1

Z240.6.2/C22.2

Z

21.19 Refrigerators

The

Z223.1-1974

A119.2-1970

CI-

2240.4 gas equipped
electrical requirements

No 148 electrical

l/4

inch.

ELECTRICAL CONNECTION

115 Volts A C

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
On

"Tri-Pover"
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.

TABLE

Maximum two conductor wire length for different
AWG numbers.

Maximum two conductor wire length in feet

AWG

14
12
10

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

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.

RM360

120w

10
17

8
6
4

27
43
69

110

l0-21

Amps at 12 Volt depending on model.

units there is an additional

RM460 RM660 RM760

135w

9

15
25
40
64

102

175w 250W

7
12 8
19
31 22

49

79

5
13
34

55

GAS CONNECTION

Hook-up to the gas supply line is accomplish­ed at the manual gas valve, which is furnish­ed with a
connection.
be checked for leaks with soapy water.
The gas supply system must incorporate a
pressure regulator to maintain a supply

sure of

3/8"

SAE (UNF

All completed connections should

not more than 11 inches water gage.

5/8"-18)

male flare

pres-

Fig.1

m

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

4

The refrigerator must be installed in a
stantial
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 re­frigerator 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
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 effi­ciency 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.

enclosure and must be level. A spirit

sub-

/

l-l _.

Minimum
ventilation
height

w

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

Refrige­rator

Minimum ventilation heights in inches

:.jiiGj

RM360
RM460
RM660
RM760

37

31
34
42
56

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
model

dimensions

Height Width Depth
A

B

C

Installation
dimensions

Height
h

Width Depth

W

d

Recess
dimensions

Height Width
H

W

Depth
D

between top
of condenser
to top of
refrigerator

e

RM360
RM460
RM660
RM760

3/8
15/166
13/166

21
23 24
23 24
23 24

30
32
40
52

11/166221/16

11/166
11/166
11/16

29
32
40 21
51

Storane volumes

Refrigerator Total storage volume in cu ft
model

RM360
RM460
RM660
RM760

3.0

3.9

5.1

6.0

EXAMPLES

RM360

The clearance N for the

in the following way:

at

Installation with upper and lower side vents.

A.

model is derived

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.

9/16
1/8

3/16

1/4 203/166

20

9/16 223/4

21

9/16 223/4
9/16 223/4

21

3/4 201/2

29

5/1662113/166

32

3/1662113/166

40

3/8 2113/166

51

3/16 11/4

21

3/4 11/4

23

3/4 11/4

23

3/4

23

1/8

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.
rator 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,
to the evaporator, where it creates cold by
evaporating into a circulating flow of hydrogen
gas.
liquid readily accumulates, forming pockets

which

can impair the gas circulation or even

block it,

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 re-

frigerator should be remembered. So, once more,
before you start the refrigerator, make sure

it is level.

where it liquifies. The liquid flows

If the evaporator coil is not level the

in which case, of course, the cooling

Clearances around the refrige-

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:

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.

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

2.
operation.
Turn the thermostat knob B to setting 4.

3.

HOW TO USE THE REFRIGERATOR

Food Storage Compartment

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.

HOW TO START THE

Gas Operation(Fig.

1. To start
position

2. Turn the

3. Push the
D of the

repeated

This can

REFRIGERATOR.

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.

Fig.7

7)

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.
crispness.
rators 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

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,
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
precooled

should be covered to retain their

The coldest positions in the refrige-

in the refrigerator, can however, also