Dometic RM3604 User Manual

32
Dometic
®
MANUAL
Refrigerators
THIS SECTION APPLIES TO THE DOMETIC MANUAL REFRIGERATOR
1C. BYPASS SCREW
The bypass screw is a small brass screw located on any
Dometic gas thermostat that regulates gas flow in the
low flame mode. There are three common sizes of this
screw: S-17 (350 BTU), S-14 (325 BTU) and S-11
(300 BTU). To check the bypass screw, connect a
manometer at the pressure test housing. The pressure
on low flame mode should be 2 to 4 inches water
column. Above 5 inches water column on low flame
mode could cause an over-cooling situation. The bypass
screw used on the Manual Refrigerators is S-14.
2C. SAFETY VALVE
The safety valve is an assembly that shuts off the supply
of LP gas to the burner if the flame goes out for any
reason. This is to ensure that a concentration of un-
burned gas does not accumulate in the refrigerator vent
area. To check the safety valve, use a known good
thermocouple and install into the safety
valve. Next, supply flame to the tip of the thermocouple
for 2 to 3 minutes while holding in on the safety valve
stem. Next, remove flame from thermocouple tip and
release safety valve stem. The safety valve should hold
in for at least 30 seconds. If it releases earlier than 30
seconds, replace the safety valve.
3C. THERMOCOUPLE
The thermocouple is a component extending above the
burner assembly so the tip is in the path of the flame. It
will produce 14 to 30 millivolts DC in normal operation.
To check the thermocouple, use a known good safety
valve and attach to the thermocouple.
Next, supply flame to the tip of the thermocouple for 2 to
3 minutes while depressing the safety valve. Remove
the flame and release the safety valve. The valve should
hold for at least 30 seconds. If it does not hold the safety
valve open for 30 seconds, replace the thermocouple. If
it does hold for 30 seconds or more, the thermocouple is
good, do not replace it.
NOTE: Be sure the tip on the thermocouple is clean.
SECTION C.
4C. THERMOCOUPLE ADAPTER
(Top Mounted Controls Only)
Located between the thermocouple and the safety valve,
the thermocouple adapter is a device that allows the
flame indicator meter to read DC millivolts from the
thermocouple.
To test the thermocouple adapter, remove it from its
location and do a continuity test from the terminal to the
center post. Continuity should exist. Next, check for
continuity between the terminal and casing. No continu-
ity should exist. If either check is incorrect, REPLACE
THE ADAPTER.

Dometic RM3604 Specifications

General

Brand	Dometic
Model	RM3604
Category	Refrigerator
Language	English