Norcold 682 Installation And Operating Instructions Manual page 11

engine's battery. The battery source is not only fur-
Refrigerator Check Out
nishing the power for the refrigerator's DC mode, but
it is also supplying the demands for the other compo-
should the installation is complete, the refrigerator
s
d be checked out in both gas and electric op-
nents in the coach. For this reason, the refrigerator's
eration. Both gas and electric supplies must be con-
DC circuit is designed to be as energy conserving as
possible with the resulting cooling power somewhat
nected . and within specifications on the front page of
less than the gas and AC modes.
this manual. Refer to pages 15 and 16 for layout of
Mode Control Panel. Check functions as follows:
Set NORMAL-STORAGE-HIGH HUMIDITY switch
IMPORTANT INFORMATION ON 12 VOLT
to HIGH HUMIDITY; set thermostat to COLDEST.
DC OPERATION (3-Way Models Only)
On 3-Way models, set DC OFF/DC ON switch to
DC OFF.
The 12 volt DC mode is not designed for continu-
Set AUTO-OFF-GAS to AUTO. The Mode Control
ous DC operation - only for short "in transit" periods
panel should display AC indicating 120 volts AC.
when gas or AC sources are not available.
Disconnect AC power. Mode Control panel should
Check the DC supply voltage at the refrigerator (not
now display GAS, indicating the system has automat-
at the battery) while the unit operates on DC mode.
ically switched to gas upon loss of AC power.
The voltage must not be less than the minimum of
Let the unit operate on gas for a few minutes to
11.5 votts .
insure the flame does not lock out.
The 12 voltDC mode cannot be used for the initial
With the aid of a mirror (dental type mirror is best),
pull-down of the refrigerator compartment(s). The in-
observe the flame. The flame should be sharp blue
itial cooling operation must be done in either the
as indicated in Figure 28 with a stable burning ap-
GAS or AC modes. The refrigerator must be cooled
pearance. The flame should have no yellow constitu-
and stabilized before the DC operation is effective.
ent or appear erratic or unstable. The flame should
The following points regarding the DC operation
be centered into the flue tube without touching the
should be considered:
inner wall of the tube. See Figure 28.
a. Operate the refrigerator in the DC mode only
Turn off gas supply at refrigerator's manual valve
in periods when AC or GAS operation is un-
(See Figure 11). After about 20 seconds the red X on
available.
the Mode Control panel will indicate loss of flame.
b. The DC operation is designed to operate during
Turn gas supply back on. The gas should remain
a short "hold over" period, such as a four (4) to
locked out. Switch AUTO-OFF-GAS to GAS. The gas
six (6) hour period while in transit. The refrig-
erator should not be switched to the DC mode
mode should be re-established indicated by LP on
if the food is not completely chilled.
the Mode Control panel.
c. Good battery condition is essential when oper-
On 3-Way models, set DC OFF/DC ON switch .to
ating on DC. This implies an adequate recharg-
DC ON. The Mode Control panel should display DC in-
ing means which can handle the demands of
dicating operation in 12-volt DC mode. Also, the gas and
the refrigerator along with other loads.
AC functions will be disabled regardless of the AUTO-
d. The wires from the battery to the refrigerator OFF-GAS setting. Re-set the switch back to DC OFF.
must be of large enough size to handle the
Check the divider between the two doors; the divider
load. The connections must be clean, tight and
panel should feel warm after being on for a few min-
free from corrosion. If not, a resulting voltage
utes. Turn NORMAL-STORAGE-HIGH HUMIDITY to
drop will cause a decreased cooling capacity.
STORAGE. All functions, including Mode Control panel
and the interior cabinet light should be off. Then move
Hypot Tests
the switch to NORMAL. The refrigerator should return
to the operation indicated by the Mode Selector switch.
A successful Dielectric Strength test (Hypot test)
AN EXAMINATION OF THE VENT AND FLUE
has been conducted at the factory and the refrigera- SYSTEM SHOULD BE MADE TO INSURE THAT
for does not require an additional test. If Hypot tests
NOTHING IS OBSTRUCTING THE NORMAL FLOW
are to be conducted on other 12-volt DC circuits, the
OF COMBUSTION AND VENTING AIR. PAY PAR-
12-volt supply to the refrigerator must be discon-
TICULAR ATTENTION TO THE AREA ABOVE THE
nected to protect the sensitive electronic circuit. In
REFRIGERATOR TO GUARANTEE THAT FIBER-
addition, never contact the positive probe of the Hy-
GLASS OR OTHER MATERIALS DO NOT BLOCK
pot tester to the chassis or grounded members of the THE PASSAGE. THE REFRIGERATOR AREA
vehicle since damage could be introduced into the
MUST BE CLEAN AND FREE OF COMBUSTIBLE
electronics. Failure to observe these precautions
MATERIALS, GASOLINE, AND OTHER FLAMMA-
voids the Warranty.
BLE VAPORS OR LIQUIDS.
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