Dometic RM182B User Manual

B)TDometic

Diagnostic Service Manuals

United States

SERVICE OFFICE

DOMETIC SALES CORP 509 South Poplar

LaGrange,

IN 46761

SERVICE

Edition

August 1982

DSC

#651

SERVICE MANUAL

RM182

When

ordering MODEL. For

electric

VOLTAGE -WATTAGE

spare parts always state:

QUANTITY * PART NUMBER * DESCRIPTION

details also:

REFRIGERATOR

TABLE OF CONTENTS

Installation Instructions

Instructions For Use

182B

Page 2

Page 3 General Instructions Sealed Combustion Unit Ventilator (improved cooling performance) Fuse

12 Volt Circuit

Steps To Take When The Refrigerator Has Not

Been Used For A Long Period Pilot Outage Periodic Maintenance

Removal And Installation Of Refrigerator

Component Replacement

Replacing The Electric Heating Element Replacing Voltage Selection Switch Replacing Gas Shut-Off Valve (Gas-Cock)

Replacing

Thermostat

And

Flame Failure Safety

Device (Safety Valve)

Replacing Thermo-current Adapter

Page 4 Page 4 Page 4 Page 4

Page 4 Page 4 Page 4

Page

5 Page 6 Page 6 Page 6 Page 6

Page

Replacing Thermocouple Replacing Spark Ignitor With Cable Replacing Burner Jet

Cooling

Removing The Air

Wiring Diagram

Troubleshooting The Refrigerator- L.P. Gas

Troubleshooting The Refrigerator - Electric

Figures 1 through

Unit Replacement

The Piston

(Joint

RM 182 B

Pump

And

Ring)

Replacing

Page Page Page Page

Page 9

Page l0

Page 11 Page 12

-l-

INSTALLAT

INSTRUCT IONS

ION

The design of this refrigerator has been certified and approved by the American

Gas Association and the Canadian

This certification is dependent,

GAS

Association for

Recreational Vehicles.

however upon proper installation’-and the use of

the venting components as shown in these instructions.

Installation

The installation of the refrigerator must

sence of local codes

the following American National Standards and Canadian Stan-

dards are applicable

In the USA:

ANSI z ANSI c

223.1.1

1978 National Fuel Gas Code 1978 National Electric Code

In Canada:

CSA Std. Z 240.4.

*Gas Equipped Recreational

Vehicles and Mobile Housing

*Note: and Z 24o.4.2. CSA Std. Z

Will be replaced by CSA Stds. Z

when available.

24o.6.1.

Electrical Requirement for

Mobile Housing

CSA

Std. Z

24o.6.2.

Electrical Requirement for

Recreat

comply with local codes or in the ab-

24o.4.1

ional

Vehicles

-2-

B. INSTRUCTIONS FOR USE

RM182B

The Controls

Control Panel : Fig. 1 Page 1

1. “A”

"B"

"C"

Controls are located at the top of the refrigerator.

___

Air Pump and Piezo Lighter

Safety Valve

Thermostat for Gas and 120

the unit runs

continously)

Volt Operation (12 volt has no thermostat,

Voltage Selector Switch

Gas Shut-Off Valve Flame Pilot Sight Peep

Gas Operation

_________ ____________ ____ ___________

Place Voltage Switch Valve

Turn thermostat "C" (Fig. 1) to

Depress button Release button "B" and pump knob "A" (Fig. 1) 20 times DO

Lighting the Burner

"D"

"E"

(Fig.1) to position

"B"

(Fig. 1) for 20 seconds to let gas flow to burner

(Fig. 1) on position

until click is heard, stop short of this position.

Once again, press button

knob

“A” (Fig. 1) several times until

"B"

is Piezo Lighter).

When burner is lit, hold button

Flame may be observed through pilot sight peep "F" (Fig. 1) and ice tray should show signs of cold after two hours.

then place Gas

maximum

NOT

pump

(Fig. 1) and hold, simultaneously pump

noticable

"B'

(Fig. 1) for at least lo seconds.

click is heard (this

Electrical Operation

Place Gas Valve "E" (Fig. 1) to position 0 Place Voltage Selector Switch

NOTE: cause of an inserted relay, the 12 Volt operation is only possible

if the car ignition is switched on.

Temperature Control

_______

_______________

With the thermostat knob "C" (Fig. 1) set at the middle position, the cabinet will automatically maintain a suitable temperature for ordinary

food storage. hot weather, or when more cooling is required, the knob

must be turned to a higher position.

If less cooling is required, the knob should be turned to a lower

sition.

If knob

circuit is switched off. During gas operation the same position corres-

ponds to

_______

"D"

(Fig.

1) to the appropriate voltage.

The 12 volt circuit is not thermostatically controlled, Be-

Usually, no further adjustment will be necessary, but in

"C"

(Fig. 1)

"C"

(Fig. 1) is turned completely to the left, the

Minimum

Cooling.

120

Volt

po-

-3-

General Instructions

Sealed Combustion Unit

The sealed canbustion unit is made up of the burner, a fresh air intake and exhaust pipes, and a vent/air-intake assembly in the wall.

The burner unit is completely sealed off’ of the two special inlet and outlet pipes.

from the interior of the van by means

In the vent /air-intake assembly,

fresh air is drawn in one pipe and combusted gases are safely vented to the

outside through the other pipe.

Ventilator (Cooling Fan)

In order to improve the cooling performance under the difficult built-in situ-

ation and high ambient temperatures,

matically when the temperature around the

140~

gerator) reaches

NOTE:

F and switched off at 124 F.

a o,6 W ventilator is switched on auto-

condenser

fins (behind the refri-

The ventilator is connected to the 12 V-circuit in such a manner that it is

also operational during the 120 V and gas operations.

Fuse

For 12 V use the refrigerator is protected by a fuse installed in the general electrical circuit of the vehicle. If the fuse bums out, trace the cause and correct it before fitting a new lo amp. fuse.

Steps To Take When The Refrigerator Has Not Been Used For A Long Period

If there has been a heavy rain,or the vehicle has been through a car wash,

be_

water may have collected in the burner housing. This must

the gas is lit.

For this, the sealing plug underneath the front of the refri-

removed before

gerator on the left is unscrewed from the drainage tube and the water is allowed to escape.

The sealing plug must then be carefully refitted since a

good seal is essential for the proper function of the combustion system._ Check

that the windscreen of the outside wall of the van is clean and remove any

dirt that is present.

Pilot Outage

It has been determined that this problem can be causedbya poor seal between

"E"

the slide for ventilation housing

(Fig.2) and the side wall of the ve-

hicle. When properly sealed,

this plate acts as a baffle to protect the exhaust outlet tube from direct air flow. If this seal is not complete, air will be allowed to flow between the plate and the side wall of the vehicle directly into the exhaust outlet tube.

"D"

This problem can be caused by failure to tighten the mount

"F"

properly, a bad gasket

(Fig.2) or a warped locating plate

(Fig. 2) screws

"E"

(Fig. 2).

Periodic Maintenance

Once or twice a year, depending on use,

it is necessary to clean and adjust

the burner assembly.

The burner ist fitted with a # 24 jet, which is suitable for use on Propane

or Butane gas at a supply pressure of 11 inches water column pressure. The orifice in the jet is very small and must never be cleaned by means of a pin or a similar instrument for this will damage the orifice. Should, for

reason,

the jet require cleaning,

it should be washed in alcohol and blown

some

dry with air. The entire gas installation should be checked for leaks. Test all pipe connec-

tions with soapy water, not with an open flame.

-4-

REMOVAL

AND INSTALLATION OF REFRIGERATOR

Remova

Disconnect electrical supply. And make sure the

gas supply is shut off at

its source.

Remove the vent /air-intake assembly on the van

a. Unscrew three self-tapping screws

(A,Fig.2)

then remove windscreen and separating plate

b. Unscrew four screws

(D,Fig.2)

of the fixing

fixing plate and gasket (F, Fig. 2) from the

wall outside . of the windscreen

(B,Fig.2)

(C, Fig. 2).

plate (E,Fig. 2) and remove

caravan wall (G, Fig. 2) to

the vent casing (H,Fig. 2).

Open and remove all three doors of the kitchen cabinet (Fig.3). Pull out drawer. Dismantle and remove shelves. Then lift door from hinge posts (Fig.3).

Remove three protective caps (A, Fig.4) from the refrigerator frame

(B,Fig.4) and unscrew the three screws that are behind the caps. Then on each side through the doors,unscrew two

phillips

screws (C, Fig.4) from the walls of

the refrigerator.

5. t en pull out the left groove according to arrow

Remove 120 V connection plug (A, Fig.6) from the socket, pull out 12 V plug

pull refrigerator frame forward in the lower right (Fig.

(B,Fig.S)

toward the right.

5,arrow

connection (B, Fig.6). Unscrew threaded union of the gas-connection line

(C,Fig.6)

of the refrige-

rator.

Unscrew ventilation grill (A. Fig. 7) by removing two screws (B, Fig. 7) and

then remove refrigerator by pulling forward.

Installation

The installation is carried out in the reverse sequence to that described for

the removal of the refrigerator.

IMPORTANT:

After installation, check gas system for leaks, with soapy water.

NEVER USE A

MATCH

-5-

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