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

7

be stored in the frozen food storage compartment.
They can then be stored about three times as
long as in the fresh food storage compartment.
To prevent drying out, keep food in covered
dishes,

in plastic bags or wrapped in aluminum

foil.

CAUTION

Do not store explosive substances in the re-

frigerator,

petrol,

such as cigarette lighter gas,

ether or the like.

Ice Making

Ice cubes can be made in the ice trays which
should be filled with water to within

l/4"
(5 nun) from the top. To release the ice cubes
seize the tray with both hands and twist the

tray. Cubes not required should preferably
be replaced in the tray. Refill the tray with

water and replace the tray on the freezer

shelf.
Ice making is accelerated if the thermostat
knob is turned to setting "MAX". It is a good
idea to do this a few hours before an anti­cipated need for ice but be sure to turn the
knob back to normal setting when the ice is
formed or the foodstuffs in the cabinet may
become frozen hard.

Defrosting

Some refrigerator models are equipped with an

automatic defrosting device incorporated with

the cooling unit. This device makes a quick

defrost of the finned evaporator section about

once a day without affecting the frozen food
storage compartment or the frozen foods contained
in. When the frozen food storage 'compartment is

covered with frost the refrigerator must be shut
down temporarily till the frost is melted. Before
the refrigerator is restarted the compartment

should be dried,

the ice trays washed and re-

filled with fresh water.
When the frost on the finned evaporator section
has melted, water will be collected in the drip

tray. The drip tray should be emptied at regular

intervals.

Some refrigerators without the automatic de­frosting device should be defrosted regularly'
by turning off the refrigerator. Empty the re­frigerator leaving the drip tray under the finned
evaporator and the cabinet and freezer doors

open. If desired, defrosting may be speeded up
by filling the ice tray with hot water and
placing it in the freezer.
When all frost is melted, empty the drip tray and

dry the interior of the refrigerator with a

clean cloth.
Replace the drip tray and ice tray, replace all

food stuffs and set the thermostat to "MAX" for

a few hours. Then reset the thermostat knob to

its normal position.

of weeks,

it should be emptied and cleaned and
the door left ajar. The ice trays should also
be dried and kept outside the cabinet.

Cleaning

To clean the interior lining of the refrigerator
use lukewarm weak soda solution. The evaporator,
ice trays and shelves must, however, be cleaned

with warm water only. Never use strong chemicals

or abrasives to clean these parts or the pro­tective surface will be spoiled. It is important
always to keep the refrigerator clean.

Periodic maintenance

NOTE: Before working on the refrigerator, make

sure that 110 V A. C. and optional 12 VD.C.
leads are disconnected.

Once or twice a year depending on use, it is
necessary to clean and adjust the burner assembly.
Proceed as follows:

Loosen screw and remove cover plate for burner

1.

housing.

Disconnect lighter cable from the electrode.

2.

Loosen burner fixing screw and withdraw burner.

3.

Clean burner tube with a brush. Blow with

4.

compressed air.
Screw off jet and clean with alcohol. Blow

5.

with compressed air. Never use a needle or

similar.

Clean flue baffle and flue.

6.
Clean the cooling unit and the floor under the

7.
refrigerator.

Reassemble.

8.

The entire gas installation should be checked

9.
for leaks. Test all pipe connections with
soapy water,

not with an open flame.

To Shut Down the Refrigerator

To shut down the refrigerator temporarily set

the thermostat to off and turn off the gas tap.
If the cabinet is not in operation over a period

CABINET ADJUSTMENTS

To change door panel

The refrigerator is normally delivered without door
panel(s).

that the panel dimensions are in compliance with
those given in the table and read the instructions

through. When

1.

Remove the
two screws

2.

Insert one
into the groove of the door frame (3).

Bend the panel gently so that the free side of

3.
the panel can be slipped into the corresponding
groove of the door frame (4).

Push the panel downwards so that the lower hori-

4.
zontal edge of the panel is fitted into the

bottom groove (5).

Between the upper edge of the panel and the door

5.
frame
by the decoration strip.

Before starting the mounting work check

mounting the panel, proceed as

top decoration strip (2) with
(1).

of the vertical edges of the p

there is now a gap which should be covered

follows:

its

anel

a

6.

Put the strip across the door so that the gap
is covered and push it upwards (6).
The tabs on the inside of the strip should fit
in behind the flange of the door frame. Secure
the decoration strip by means of the two screws (1).

Panel dimensions
Thickness max.

Type

RM 360

RM

460

RM 660

RM 760
upper

RM 760

lower

Max. Min.

636
25"

679
26

879
34

288
11

801

31

5/32"

Height

Max.

633 516,5 513,5

24

23/32"

5/8"

11/32"

17/32"

7/8"

676
26

19/32"

876
34

l/2"

285
11

7/32"

798

31

13/32"

20

550,5 547,5
21

550,5 547,5
21

550,5 547,5
21

550,5 547,5
21

Width

11/32"

11/16"

11/16"

11/16"

11/16"

Min.

20

7/32"inch

21

9,16":ch

21

9/16"inch

21

9/16"inch

mm

21

9/16"inch

mm

mm

mm

Fig.8

9

Replacement of door gasket (Fig. 9)

1. Pull the old gasket out from the door frame.

2. Make sure that no gasket parts are left in
the groove.

3. Beginning in one of the corners, fit the new
gasket by pressing it into the groove.

Reversing outer door (Fig. 10)

Fig.9

1. Remove the plastic cover (1) by loosening the

screws (2) underneath.

2. Remove the upper hinge pin (3).

3. Remove the door and move the lower hinge pin (4)

to the other side.

4. Fit the door and press the upper hinge pin
(3) into the adequate hole.

For two-door refrigerators the middle hinge and

the travel latch should change position.

Replacement of evaporator door on
RM460,

RM660

(Fig. 11 and 12)

1.

Pry the spring housings (B) away from the li­ning so that it snaps out and turn the spring
housing downwards

180'.

RM360,

Fig.10

Push the carrier (A) inwards by means of a

2.

blunt mandrel or pin and remove the shutter.

Mount the new shutter in close position first

3.

on one side,making sure that the cross slots
engage in the cross on the hinge plate (C).

Press the carrier on the opposite side so that

4.

the hinge plate on the shutter can be pushed
over it. See that the crosses engage.

Turn the spring housing round and up until the

5.
small tag (D) snaps into the slot into the
lining.

Fig.11

Fig.12

Replacement of evaporator door gasket on

RM460, RM660

1. Remove the door as previously described.

2. Unscrew the hinge plates (A fig. 13).

3. Put shutter on a flat surface with the sealing
gasket up.

4. Pry the shutter front away from the inner

pan by means of a screwdriver.

CAUTION: It is of great importance that the
screw driwer

the plastic tongues (B fig. 13) which hold

the inner panel and the shutter front to­gether.

5. Replace the sealing gasket round the in-

ner panel and snap the inner panel with

sealing gasket into the shutter front

until the tongues snap in position.

6. Mount the shutter as described above.

is applied in front of one of

RM360,

Fig.13

THE

ABSORPTION COOLING

Sealed system construction

The sealed system of the absorption refrigerator If an excessive vaporizing of the ammonia within the

is constructed of welded steel piping which
tains the refrigerant charge. The charge consists
of ammonia, hydrogen and water. There are no

ving parts associated with the absorption system.

When servicing an absorption system refrigerator,

do not puncture or break the piping. Should a
break occur and ammonia contact the skin, wash the
affected area immediately with clear water. Do not
attempt to open the valve on the absorber vessel.
The valve is covered with a plastic can and should
never be removed.

OPERATION

It is obviously important that all external fac­tors affecting the unit should be checked properly
before a unit is condemned as faulty and that empha-

sis has been placed upon the necessity for correct
installation,
put,

wattage of the electric heater and make sure that

the heater element is inserted to its full length

in its pocket. If the electric heater is only part-

ly inserted,
causing an excessive vaporizing of the ammonia within
the boiler when operating on electricity. The same

symptom can show up with too much or too little
heat input either on electric or on gas operation
and also if the refrigerator had been operating in
an off-level position or with inadequate
tion.

ANALYSIS FOR COOLING UNIT

upright refrigerator, correct heat in-

baffle position, etc.Check the size and the

the heat distribution will be incorrect,

UNIT

con-

mo-

ventila-

boiler occurs due to the reasons above, the liquid
mixture in the boiler becomes very
will cease to operate, which means that the

porator inside the cabinet ceases to produce coo-

weak

and the pump

tion of liquid stops with the result that the eva-

ling.

Such a blockage of the unit in the liquid circuit
ist most usually made evident by signs of
ting on the vapour pipe leading from the boiler to
the condenser,
red and the metal becoming discouloured.

To remedy this fault it is recommended to remove the

unit or refrigerator complete whenever possible and
to allow sufficient time to- cool down the unit. Turn
the unit or refrigerator upside down several times,

so that the liquid in the absorber vessel can be
mixed with the liquid in the boiler. This procedure
will restore the liquid balance to the unit.

The temperatures on various parts of a unit vary

continuously when it is operating on thermostatic

control and it is impossible to base a judgment on

the symptoms given unless the refrigerator has been
operating continuously on fully correct heat input

for at least 5 hours,

to examination. In many cases this can be arranged
by a telephone call to the customer, asking him to
switch the thermostat to "MAX" on the day before the

inspection call. If after 12 hours' operation on
"MAX"

the performance is satisfactory, the unit is

not at fault unless the complaint is one of varying

or intermittent performance. In this connection

the paint on this pipe being

and preferably 12 hours, prior

circula-

overhea-

bliste-

11

the room temperature at the time of the complaint

must be considered, as a unit which

atbean ambient

satisfactory at 95 F

cases where satisfactory performance is obtained

In

"MAX" but not on other settings, the thermostat

to be suspected.

is

When a normal unit is working on

coil will be warmer at the bottom than it is at the
top. The absorber vessel will be warmer. The vapour

cooling pipe from the boiler to the condenser will leak by traces of a yellow deposit at the point
be warm, bearably to the hand, at the bend where
it joins the condenser,with a gradual rise in
perature towards the boiler end.

COOLING UNIT REPLACEMENT

Remove the refrigerator from its recess as follows

Check that refrigerator is empty and remove

1.
ice tray.

2.

Turn off gas bottle.

temperature ofo650F (+18OC)

(+35

C).

RM360, RM460, RM660

is satisfactory

may not

"MAX"

the absorber

tem-

Unit filling valve

The needle valve used for admitting the filling

charge to a cooling unit is fitted to the unit's
absorber vessel and is covered by an aluminium or
plastic cap. It is strictly applied provision of
the warranty extended on the unit to the customer,
that any interference with the
automatically void the warranty.

Unsatisfactory unit performance due to an

leak can be determined in the case of a visible

where the ammonia is escaping. If there is a leak
on the evaporator inside the cabinet, a smell of
ammonia may bee noticeable.

filling

valve will

ammonia

Disconnect gas line to inlet valve

3.

CAUTION: Use a backup wrench to prevent

Unplug the electric line from the trailer

4.
outlet.

Remove the 4 screws in rear front frame.

5.

Check for any additional screws which the

6.
vehicle manufacturer may have used to

fasten the refrigerator in place.

Carefully slide the refrigerator straight

7.
out of its recess.

To remove the cooling unit from the cabinet,
proceed as follows:

1.

Place the refrigerator on a work bench of

suitable height.

2.

Remove the thermostat capillary tube by

loosening the two screws (1) on the eva-

porator fins (fig. 14).

CAUTION: The locations of the thermostat
capillary tube should be noted at this

time for relocation later on. The tubes

must be placed in the right position,

otherwise,
sult.

undue rotation.

improper performance may re-

Fig.14

-6

Remove the two sealing plugs for capillary

3.
tube, one on the back and one inside the
cabinet,

Remove the capillary tubes by going to the

4.

back of the refrigerator and gently pulling

the tubes straight out.

and straighten the tubes.

Fig.15

5.

Remove the screws (2) in fig. 14 and take away the
evaporator fin. Remove the screws (3).

Remove the connection block (4) cover (Fig. 15) and dis-

6.
connect the electrical wires for the heaters.

7.

Remove the grounding screw

8.

Remove the flue and the flue baffle.

(6),

Remove the screws

9.
onto the back of the cabinet.

10.

Disconnect the burner case by turning the lever
(7) as shown in the picture.

11.

Carefully bend absorption unit out of cabinet

(Use a crowbar or similar and a wooden piece as

protection when doing this).

12.

To replace absorption unit, reverse above procedure.

CAUTION:

holding the absorption unit

(5).(Fig.

15).

12

8 9

1.

Be sure to apply sealing permagum (8) on the

unit mounting plate (Fig. 16).

2.

Be sure to apply proper amount of "Thermal Mas­tic" on the evaporator coil (9).

3.

When fitting the evaporator fin be sure to tighten

the screws properly in order to obtain a perfect
contact between the evaporator coil and evapora­tor flange,

may result.

COOLING UNIT REPLACEMENT

The following steps are different from the models

RM460 and RM660.

1.

The screws (1) in the freezer should be removed (Fig. 18)

2.

The capillary tube should carefully be pulled
out from the tube

When

3.

bending the cooling

or similar as well as the wooden protection as shown

in the picture.

otherwise improper cabinet performance

RM760

RM360,

(2).(Fig.

19).

unit

out, place the crowbar

Fig.16

Fig.17

Fig.18

Fig.19

13

THE GAS/ELECTRIC EQUIPMENT

Gas equipment parts

1.

Burner tube

2.

Burner, housing

3.

Jet

4.

Feeler point thermocouple)

5.

Flame failure safety device

6.

Bypass screw

7.

Gas/Electric thermostat

8.

Pressure test gage connection

9.

Capillary tube for thermostat

10.

Shut-off value

11.

Piezo

12.

13.

igniter
Firing tip
Flue baffle

Fig.20

Electric equipment parts

14.

Flexible cord

15.

Change-over switch

16.

Terminal block, 12

17.

Fuse

18.

Relay

19.

Heater

VDC

Replacement of gas/electric equipment complete

Remove the covers by removing the screws (1).

1.

Disconnect the heater cords at the terminal

2.
blocks (note the locations for later relocation).

Remove the capillary tube carefully from the

3.
evaporator.

Remove the screws (2).

4.

Release the burner housing from the flue by

5.
turning the lever (3) as shown.

Pull the equipment out from the cabinet.

6.

Fig.21

1

.

220v

1

_12V

ZI

14

115v

240v

Disassembly of gas electric/equipment

Press the plastic latch (leftwards

1.
in Fig. 22).

Pull the relay out (if any).

2.

Snap off the fuse holder.

3.

Press the spring.

4.

Pull the shut-off valve out.

5.

Press the gas/electric thermostat

6.
wards and lift it out.

Unscrew the thermocouple from the flame

7.

failure safety device.

left-

Press the retaining spring for release of

8.
thermocouple.

Pull out the thermocouple leftwards.

9.

Pull the flame failure safety device left

10.
and lift it out.

Pull off the ignition cord.

11.

Snap off the retaining spring.

12.

Pull out the igniter.

13.

NOTE:

When assembling, always use new

-

for the joints.

O-rings

2

0

Fig.22

15

DISASSEMBLY OF BURNER

Remove the cover

1.
Unscrew

2.

Remove the burner by removing the screw (3)

3.

the burner jet (2).

JET AND BURNER

by removing the screw (1).

OPERATION ANALYSIS FOR LP GAS REFRIGERATORS

SYMPTOM

P

CAUSE

z
:

T1z

8

8

c .z :

8

;:

c)

c

.;

5

‘d

2

z :

L

*

2 .rl&W

0)
MW 4.l

‘;: ‘C

:

?”

diz$LZ80a

48

u

2::

c

‘;:

8”

MZ

l.l
g j $ .j

z

.rl

z u ti

;:

:

:

Note: It will be noted in this tabulation that
several causes can be responsible for the one

2

.rl

effect. The real cause or causes should be de-

S

”

termined
gation each possible cause. proceeding to the
bottom.

g
z

x

Gas leaks

by a process of elimination,

investi-

Fig.24

OPERATION ANALYSIS FOR REFRIGERATORS OPERATING ON ELECTRICITY

16

SYMPTOM

r

-

-

272

2
5

a

2

rl

0

0
0

4-l

“d
g

5

cc

X

X

X

X

X

X

X

X

.d

.rl

G

2

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

2

u

s

X
X
X
X
X
X
X
X

X

ii!

it

X
X

G

*rl

%

2

&J

iz

-

-

-

-

-

-

-

-

­X

-

-

-

-

-

-

5

ls

w

8

X

X

-

-

-

-

-

-

-

-

-

.?I
v-4

d

”

0”

u

z

zl

L!

E

u

X

X

X

z

‘;1

ICI

d

-

x

-

-

-

-

-

-

­X

-

-

-

-

-

-

-

-

-

-

-

4-l

2

.rl

-G

”

4

.d

“d

.d

t.4

0’

0”

-

-

-

-

-

-

-

-

-

-

-

X

-

X

-

X

-

-

-

-

-

CAUSE

Note: It will be noted in this tabulation that

can

several causes

effect. The real cause or causes should be deter­mined by a process of elimination, investigating
each possible cause,starting at the top of the

tabulation and proceeding to the bottom.

Not adequate ventilation
Refrigerating unit not level
Heater
Voltage not constant
Electric connections loose
Heater not inserted correctly in its pocket

Improper food storage
The thermostat incorrectly used

Improper storage of liquids and moist foods
Leaky cabinet seals

Infrequent cleaning of food compartment
Refrigerator shut off with closed door
Unwrapped odorous food

Incomplete contact of thermostat capillary tube
Lost thermostat charge
Failed refrigerating unit
Room temperature too low

faulty,wrong

be responsible for the one

voltage or type

17

200 7390

N
L

12VOLTS

@

GREEN

@

GREEN/YELLOW

DC

12VOLTS DC

115

VOLTS AC

THERMOS TAT

0

JUNCTION BLOCK

0

TERMINAL

BLOCK

Fig.25

Wiring Diagram for Product No. 926 63 01

RM760

115VOLTS

AC

Fig.26

Wiring Diagram for Product No. 926 63 02

RM760

20075871

115VOLTS

@

SWITCH

@I THERMOS TAT
8 JHEyTIRm

BLOCK

18

AC

Fig.27

Wiring

Diagramfor

Product

6
@j
@ GREEN/YEL

No.

BLACK
GREEN

@

WHITE

@

BLACK

@

GREEN

9266901,

RM360

N_

LOW

92670

01,

RM460

-I

115

VOLTS AC

---

l

Lr-7

I

8,

I

zzz

m

926

RM660

71

01

@

SWITCH

@I THERMOSTAT
0

JUNCTION BLOCK

@

HEATER

e> TERMINAL

8

FUSE

@

HEATER

BLOCK

Fig.28

Wiring

Diagram

for

Product

O

.

N

92 6 02,

92 7

RM360

02,

RM460

926

71

02

RM660