Service manual

(17)
This component replaces the piezo lighter
that has been used on Dometic manually
controlled refrigerators for several years. When
the automatic controls select LP gas operation,
12 volts are sent to the igniter which produce
a high voltage to create a pulsating spark at
the burner. If for any reason the flame blows
out, the igniter will re-light the flame at the
burner.
(18)
To better understand how the first generation
series models operate, we will illustrate how a
typical RV family would use the refrigerator.
It is always recommended to pre-cool the
refrigerator before taking the RV on a trip to
gain the most efficiency from the unit. So, a
day or two before the customer plans to leave
on vacation the coach is plugged into 120 volts
shore power.
(19)
The customer then selects the desired
thermostat setting on the refrigerator. A
normal setting for the first generation series is
setting number 4,
which will provide an
approximate lower cabinet temperature range
of 35 to 40 degrees.
(20)
Now, when the main rotary switch is turned
on, the refrigerator will automatically start
operating on the 120 volt AC cooling mode.
A-6-6