Thetford 6100 Series - Manual (Page 10)

board located at the rear of the refrigerator (Figure
9). The 12 volt DC should enter the refrigerator’s en-
closure near the refrigerator’s power supply board.
The 12 volt DC connects at (2) one quarter inch
quick connects. The positive DC input lead connects
to terminal J4, and the DC ground input lead con-
nects to terminal J3.
CAUTION: Correct polarity must be ob-
served when connecting the DC supply.
Do not use the chassis of the refrigerator
or the vehicle frame as one of the conduc-
tors. Connect DC supply wires at the bat-
tery and route to the refrigerator.
The distance the current travels from the battery to
the refrigerator dictates the wire size. Undersized
wire can result in a voltage drop, which will affect the
wattage output of the DC heater and result in re-
duced refrigerator performance. Norcold recommends
the installation of a fuse in the supply wiring between
the battery and the refrigerator. For optimum protec-
tion, install the fuse as close to the battery as possi-
ble.
WARNING: A circuit overload can result in
an electrical fire when undersized wires or
improperly sized fuses are used. To pre-
vent a possible electrical fire, follow
R.V.I.A. A119.2 Standards, Norcold’s wire
size and fuse specifications, or applicable
state and local codes.
TABLE 3
12 VOLT SUPPLY WIRING AND FUSE SIZE
6162, 6182
662, 682
6052, 652
6163, 6183
663, 683
6053, 653
min.
wire
size
max.
fuse
size
min.
wire
size
max.
fuse
size
Min.
wire
size
max.
fuse
size
0 - 20’ 18
AWG
6 Amp 10
AWG
30
Amp
12
AWG
20
Amp
over
20’
18
AWG
6 Amp 8
AWG
40
Amp
10
AWG
30
Amp
If a wire size is installed which is larger than the
minimum size indicated the table above, it must be
fused in accordance with the R.V.I.A. A119.2 stand-
ard or local governing codes.
Hypot Test
A Dielectric Strength test (hypot) has been con-
ducted at the factory; this refrigerator does not re-
quire an additional test. If hypot tests are conducted
on the vehicle’s 12 volt circuit, the 12 volts must be
disconnected from the refrigerator to protect the
flame ignition circuit.
Testing the Vehicle’s Gas Supply Piping
When installation of the refrigerator is complete, the
propane gas supply piping must be inspected and
tested for leaks from the refrigerator to the main gas
supply tank. Use a leak detection solution. Do not
test for leaks with an open flame.
If compressed air is used for leak testing, the gauge
pressure must not exceed 1/2 pound per square inch
(14 inches water column).
The appliance and its individual shut-off valve (Fig-
ure 10) must be disconnected from the gas supply
system during any pressure testing of that system at
test pressures greater than 1/2 psig (14 inches water
column).
The appliance must be isolated from the gas supply
system by closing its individual manual shut-off valve
(Figure 9) during any pressure testing of that system
at test pressure equal to or less than 1/2 psig (14
inches water column).
Check the gas pressure to the refrigerator without
other gas appliances operating. The pressure should
not exceed 11 inches water column. With other appli-
ances operating the pressure should not be less than
10.5 inches water column.
Check Out - Flame Failure Safety Device
Before placing the refrigerator into operation, the
gas safety device must be tested(see Operating In-
structions on page ). The purpose of the gas safety
device is to prevent the escape of unburned gas from
the burner if the burner flame is extinguished. While
there is a flame present at the burner, disconnect the
electrode wire to ignition module (see Figure 11).
Figure 10
10