Norcold 442 Installation And Operating Instructions Manual page 9

Gas Connection
The refrigerators are designed to operate on pro-
pane gas at a supply pressure of 11 inches water
column. A pressure regulator is required between the
refrigerator and the main gas tank. Do not connect
the refrigerator directly to the main propane tank
without a pressure regulator.
Use supply piping and fittings that comply with local,
state, and national codes governing type and size.
These components should also comply with NFPA
501C. Flexible metal connectors must comply with
the current CAN 1-6.10 Standard. To prevent gas
pressure loss to the refrigerator, the propane should
be supplies by a 3/8 inch diameter copper piping.
The gas supply piping is connected to the refrigerator
by means of 3/8 inch SAE (UNF 5/8 - 18) male flare
fitting.
Route the gas supply piping to limit vibration and
abrasion. The gas supply piping should enter the re-
frigerator enclosure near the gas connection at the
rear of the refrigerator. The hole through which the
gas piping enters should be of sufficient size (ap-
proximately 1/2 inch diameter) to provide adequate
clearance for the piping. Once the gas piping is in
place, apply a sealant around the piping at its point
of entry to minimize abrasion and vibration, and to
serve as a barrier to external moisture.
CAUTION: Use two wrenches when ma-
nipulating the gas inlet fitting. Failure to
use two wrenches can over stress the pip-
ing and create gas leaks.
Manual Shut-Off Valve
Hold
Turn
Figure 8
The gas supply is connected to the refrigerator at
the inlet to the manual gas valve located at the bot-
tom rear of the refrigerator. Access to this area is
obtained through the vehicle's lower vent door. Care
must be taken when connecting the gas piping to the
refrigerator to insure the fittings are secure.
3/8 " Gas Supply
9
Figure 9 Rear View
120 Volt AC Connection
WARNING: The refrigerators are designed
to operate on a 120 volt, 60 Hertz
grounded AC circuit. The refrigerator's AC
power cord is equipped with a three-prong
grounding plug which must mate with a
three-prong grounded receptacle to protect
against possible electrical shock hazards.
Operating the refrigerator without proper
ground can cause property damage, se-
vere personal injury, or death. It is the in-
staller's responsibility and obligation to
provide a properly grounded electrical cir-
cuit to the refrigerator accordance with lo-
cal codes, or in the absence of local
codes, the National
ANSI/NFPA 70. Do not cut or remove the
round grounding prong from the refrigera-
tor's AC power cord. Do not use a two
prong adapter or an extension cord.
The free length of the refrigerator's AC power cord
is 24 inches. It is recommended that the three-prong
grounded receptacle be located to the left side of the
refrigerator (viewed from rear) and approximately 12
inches from the floor (see Figure 9 above). The AC
power cord must be routed so as not to contact the
refrigerator's burner, flue pipe, or any other compo-
nent which could damage the cord insulation.
12 Volt DC Connection
A 12 volt DC supply is required to maintain the
flame ignition circuit in the gas mode and for 3-Way
models, to provide power for the DC heater. The DC
Electrical Code,