Dometic RM24A, RM36C, RM46, RM47, RM66 Service Manual

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								Service Instructions for Domtic Absorption Refrigerators
		The	absorption refrigerators												described in						this			manual	are primarily for									installation
		in	recreational						vehicles.
		Since the vehicles ni which												the refrigerato s are located may														be	driven				to remote
		c a m p sites					wh ere electrical power is											not		available, the					refrigerator5 have									b e e n
		odesignedf b ocot operatel							byp rmeano p sa n e o r									b u t a n e						g a s		a s		we ll a s				b		y
		e l e c t r i c i ty					12/110V.
		These Service Instructions													cover		the Dometic Models RM24, RM36C,
		RM46, RM47,					RM66,		RM67,			RM76, RM77.
															LIST OF CONTENTS
	Description																Pag							Description													Page
ECHNIGU FE AT UR ES																						ELECTRIC OPERATION							- FUNCTIONAL PARTS
	Ca bine tes,	. ..equipment					._	. . . .	.. . .........				. .	..	.		3							Re place	mentof heater_______________.__.												37
INSTALLATION INSTRUCTIONS																								Wiring dia gr ams ................................													38
	General instructions .						____ .		. . .	. .		.	. .	.	.		4					.PRESSURE MEASURING DEVICES												. . . . . .	. . .	. . . . .	39
	Ventilation__		. . . .		. . .	.	.	. . .	. . .	. .	.	.	. .	.	.		5					OPERATING			RE COMMENDA TIONS
	Gas connections ____ ___																5
									. . .	. . .		. .	.	.	. .									Gas operation _______ _____ _______ _____													40
	Electrical	connections___________..											______				5							Electric		operation .				. . .		.	.	. . . . .	. . .	. . .	41
	Approved	installations															7					MAINTENANCE
	Me asure ments ... . . . . . . . . . . . . . . . . . . . .																10							L evelling_________ . .						. . .		.	.	. . . . . .	. .	. . .	42
Ca binet A d j u s t m e n t s																								T e m p e r a t u r e				C o n t r o l				( t h e r m o s t a t ) . . . .					4 2
																	13																				42
	To change the door panel _ . _ ____ _____ .													.	. .									The themostat				capillary					tube . . . .		. .	. . . .
	Replacement of door gasket ___ . ________ ..																15							Storing food in the refrigerator_______.													43
	Replacement of evaporator door and gasket.																16							Cleaning	____			. . . . . ______						. . . . . . . .	. .	. . . . .	43
	Reversing outer		door__				. .	.. . .	. . . .	. . .	.	. .	.	___			18							Ice cubes___________ ____ ______________													43
THE AB SORPTION REFRIGRATOR SYSTE M																								Travel latch ____ ____ ____										. . . . . . . .	. .	. . . . .	43
	Sealed system		constructions . . _ _ _ _ .									.	. .	.	. .		20							Door seal_ . .			. . .	. ___ ______ ______ ____ ___									43
	Operating analysis for cooling unit											.	. .	. .	.		22							Odors inside the					refrigerator . . . .						. . .	. . . . .	44
	Cooling unit replacement . . .								. . .	. . .	. .	.	. .	.	. .		23							Odors from			fumes							..........		.......	44
GAS /ELECTRIC EQUIPMENT																								Flame blows			out . .		. . .	........				. ____	________		44
	Gas equipment		for RM24 .....						. . . .	. .	. .	.	. ..	.	.		28							Flint lighter_______						. . .	.		. .	. . . . . .	. .	. . . .	44
	Dual electri c		equipment for						RM24 . . .			.	. .	.	.		29							Piezo lighter ____________ _ ____ _________													45
	C a r / e l e c t r i c		equ ipment for						RM36C,								30						DIAGNOSIS
	RM46, RM47, RM66, RM67 , RM76, RM77...												_ _ _ _											Trouble shooting					-	electric operated
	AS OPERATION -		FU NCTIO NAL PARTS																																		47
																								refrigerators			_____		__	. . .		.	. .	. . . . . .	. . .	. . . .
	Termostat-	replacment___ . . . . .							. . . .	. . .	. .						32							T r o u b l e	shooting -					gas operated							48
	The gas burner																33							refrigerators_______						. . . .	.		. .	. . . . . . .	. ......
			......		. . .	..	. .	. . ..	. . . .	. . .	. .	.	. . .	.										Failed refrigerating unit_____											_____._		49
	Flue system																34
		. .	. . .	.	. . .	.	. .	. . .........		. .	. .	.	. .	.	.									Operation			analysis			for		electric
	Thermo flame failure device																35																				50
									. . .	. . . .	. .	.	. .	.	. .									operated refrigerators .								.	. .	. . . . . . . . .	. .	. . . . .
																								Operation analysis for LP gas
																								operated refrigerators .								.	. .	. . . . . . .	. .	. . . . .	51
																								Periodic		m a i n t e nea n c				. .	.		. .	. . . . . .	.. . . . .		52

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Door
All models will be delivered	with right hand door hinging,	but it is possible for
the customer to change the	door hinging from right to left	hand.

Replacement of door panel is possible without removing the door. Only the side profile of the door frame has to be removed.

Equipment

All models incorporate a thermo-electric flame failure safety device and a piezo

lighting		system.
The	equipment for electric and gas operation			is located at the rear of the cabinet
and manipulated from inside the cabinet.
The	gas shut-off valve and the electric voltage-change switch are interlocked so
that	both methods of operation cannot be inadvertently used at the same time.
The electric and gas thermostats are of the Ranco-make.
Version
All	models will be available with combination			equipments for LP gas and 110 volts
A.C.	or LP gas/110 volts A.C. and 12 volts D.C.
2.	INSTALLATION		INSTRUCTIONS
For LP-gas and electric operation in Motor Homes and Recreational Vehicles.
General		instructions
The	refrigerators		outlined herein have been	design certified under ANS 221.19

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 conform with:

In U.S.A.:

1. Installation of Gas Appliance and Gas Piping, 221.30 - 1964.

2 .	Mobile Homes A 119.1	-	1969.
3.	Recreational Vehicles	A	119.2 - 1970. The unit must be electrically grounded in

accordance with the National Electrical Code ANSI	CI	- 1968, when installed if
an external alternating current electrical source	is	utilized.
4. Any applicable local code,
In Canada:

1. C S A Standard B 149. “Installation Code for Gas Burning Appliances and Equipment”

2 . C S A Standard B 210.1/Z 240.4. “Gas equipped recreational vehicles and mobile homes”

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V e n t i l a t i o n

The installation shall be made in such a manner as to separate the combustion system from the living space of the recreational vehicle. Openings for air supply or for venting of combustion products shall have a minimum dimension of not less than

l/4 inch.

Approved installation requires one lower fresh air intake and one upper exhaust vent. The accessory ventilation kits shown in these instructions have been tested

and approved for use with the refrigerator models identified. Their use is recommen ded, and when employed, the ventilation kits must be installed and used without modification,

An opening to the outside at floor level of the refrigerator compartment must be provided for ventilation of heavier-than-air fuel gases, The lower vent in the Dometic kits is provided with proper size openings.

Gas connect ion

Hook-up to the gas supply line is accomplished at the manual gas valve, which is

furnished with a	3/8” (SAE) male flare	connection. All	completed connections should
be checked for leaks with soapy water.
CAUTION: When connecting the gas line		to the gas valve	on the gas/e1 equipment	at
the rear of the refrigerator, use a back-up wrench to prevent undue
rotation	of the gas c o c k ,
For hook-up and	servicing purpose the	lower vent is constructed as a lift out		panel.

The gas supply system must incorporate a pressure regulator to maintain a supply pressure of not more nor less than 11 inches water gage.

Electrical connections 110 V A.C.

The 110 V electric cord should be plugged into an approved receptacle in the

refrigerator compartment. The cord should		be routed to avoid coming in contact witn
the	burner cover, flue cover or other hot	components.
12	V D.C.

On “Tri-Power” units there is an additional terminal block marked “12 V”. The refri-

gerator must be	connected to the battery circuit			with two wires of adequate capacity
to avoid voltage	drop.
Do not use the body or chassis		as a substitute for either of these wires (possibly
only in motor homes). No other		electrical equipment or lighting should be connected
to the refrigerator circuit.
When estimating length and area of conductor cable, see table, page 6.
CAUTION :
Do not operate the refrigerator		on	12 Volt when	the vehicle is	parked. You will run
the battery dead	in a rather short		time.
If possible the installation of a		12	Volt operated	refrigerator	should be c o m p l e t e d
with a relay mounted either in		the car or in the vehicle (see diagram). This relay
will automatically cut out the refrigerator when				the car motor is stopped.

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To change the door panel. Model RM24.

A.Remove the top decoration strip (2) with its two screws (1). pull outward on the top of the door panel and lift slightly to free the panel from the bottom groove.

B. If a	new panel is being installed,
a s s u r e that it is the same size as
the	old panel,

c . Install the new panel by inserting one of the vertical sides of the panel into the groove of the door frame (4).

D.Bend the panel gently so that the free side of the panel can be slipped into corresponding groove of the door frame (5).

E.Push the panel downwards so that the

lower horizontal	edge of	the panel
is fitted in the	bottom	groove (6).

F. Between the upper edge of the panel and the door frame there is now

a gap which should be covered by the decoration strip,

G.Put the strip across the door so that the gap is covered and push it upwards (7). The tabs on the inside of the strip should fit in behind the flange of the door frame.

H.When put in place, secure the decoration strip by means of the two

screws (1).	The panel is then locked
in proper	position.

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5. REPLACEMENT OF DOOR GASKET ON RM24

The construction of the door complete is an aluminium extruded door frame foamed in place with the door pan and magnetic door gasket, i.e. the door pan cannot be removed,

Therefore,		a special door sealing gasket for	service purposes		has been produced			for
the	above model. The gasket is delivered in		a set consisting		of the gasket and of
necessary fastening strips and s c r e w s and is			ordered under		part No. 290 07 33-00/3.
The replacement is made as follows:
1.	Remove the door and place it with its front downwards on a soft surface.
2.	Cut off	the defective door sealing gasket,		(Cut as near	to the	door pan	as
	p o s s i b l e ) .
3.	Drill 7/64” holes for the screws of the		fastening strips. Use			the holes	of	the
	door pan as pattern.
4.	Fit the sealing gasket as shown in the		figure 21.
5,	Fit the	door and adjust it so that it seals		properly.

Fig. 21

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Replacement of door gasket on models

RM36C, RM46, RM47, RM66, RM67, RM76, RM77

1.Remove the door shelves.

2.Unscrew the upper hinge bolt, incline the door outwards and lift off the door.

3.Lay door on flat surface with door pan facing up.

CAUTION: Be sure to protect door panel to prevent scratches and dents.

4.The screws holding the door pan in place are hidden by the door gasket. Pull the door

gasket to	one	side	and	remove all screws "A"	Fig. 24
(see fig.	24)	from	the	door plate.

6. REPLACEMENT OF EVAPORATOR DOOR ON RM36C

Unscrew the retainer (fig. 25) and remove the door.

REPLACEMENT OF EVAPORATOR DOOR CASKET - RM36C

1.Put evaporator door on a flat surface vith the sealing gasket up,

2.Pry the door front away from the inner pan by means of a screwdriver (fig. 26).