Norcold 682 Installation And Operating Instructions Manual page 10

A
WARNING
DO NOT REMOVE OR CUT OFF GROUNDING
PRONG FROM AC CORD. ABSENCE OF PROPER
GROUNDING COULD CAUSE SEVERE ELECTRI-
CAL SHOCK OR DEATH WHEN TOUCHING MET-
AL PARTS OF THE REFRIGERATOR.
12 Volts DC Connection
All operating modes require a 12 volt DC supply
(even when AC or GAS modes are selected, a 12
volt DC control is required to maintain the control cir-
cuit functions). The DC lead connections (1/4" male
If compressed air is used for leak testing, the pres-
proximately 12" from the floor (See Figure 11). This
sure must not exceed 1/2 psig (3.4kPa).
allows easy accessibility through the vent door. The
The appliance and its individual shutoff valve (See
cord must be routed so as not to come in contact
Figure 13) must be disconnected from the gas supply
with the burner cover, flue pipe, or any other compo-
piping system during any pressure testing of that
nent that could damage the cord insulation. EXTEN-
system at test pressures in excess of 1/2 psig (14 SION CORDS ARE NOT RECOMMENDED.
inches Water Column).
Figure 13 - Gas & DC Supply Connections
The appliance must be isolated from the gas supply
quick connects) are at terminals located on the
piping system by closing its individual manual shutoff
Power supply at the rear of the refrigerator (See Fig-
valve during any pressure testing of the gas supply
ure 13). One connection (J4) is marked positive (+)
piping system at test pressures less than or equal to
and the other (J3) negative (-). Correct polarity must
1/2 psig (14 inches Water Column).
be observed when connecting to the DC supply. The
After placing the appliance in operation, the gas
DC supply must be fused and must be a two wire sys-
safety shutoff device must be tested, by disconnecting
tern since the certification does not allow the refrigera-
the electrode wire to the ignition module (See Figure
for chassis to be used as the return leg of the circuit.
14). In not more than 20 seconds, the flame should
The distance the current must travel from the bat-
go out, indicating the safety valve is operational.
tery to the refrigerator dictates the AWG wire size to
be used. Should the wire be too small for the distance,
a voltage drop will result. In the case of 3-Way models,
the voltage drop affects the wattage output of the sys-
•
tern heater and resultant refrigerator performance. Rec-
ommended wire and fuse sizes are shown below.
TABLE 3
12 VOLT SUPPLY WIRING & FUSE SIZE
662, 682 663, 683
min. wire max. fuse min. wire max. fuse
size size
size
size
0 - 20' 18 AWG 6 Amp 10 AWG 30 Amp
Figure 14 - Location of Electrode Wire
Electrical Connection
120 Volts AC Connection
This refrigerator is equipped with a three prong plug
for protection against shock hazard and must be con-
12 Volts DC Operation (3
-
Way Models Only)
netted into a recognized three prong attachment re-
ceptacle. The free length of cord is 24" and therefore
The refrigerator receives its power from the vehi-
is recommended that the receptacle be located to the
cle's 12 volt system, which in most cases is an auxil-
left side of the refrigerator (viewed from rear) and ap-
iary (house) battery. In some cases, it may be the
over 20'
18 AWG
6 Amp 8 AWG 40 Amp
If a wire size is installed which is larger than the
minimum size indicated in the table, it must be fused
in accordance with the requirements of the R.V.I.A.
A119.2 standard or local governing codes.
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