The 12 Volt Bay heater is standard equipment that is fairly simplistic by
design. Both the SYSTEM HEAT switch and the power switch on 12 Volt Bay
Heater need to be set to the ON position. However, this alone does not provide
power to the 12 Volt Bay Heater. The thermostat or "snap disc" will close at
approximately 40º F. + or - 6º F., allowing bay heat operation. When the tem-
perature rises above 56º F. + or - 6º F., the snap disc will open, turning the bay
heat off.
When either switch is in the OFF position or the snap disc is in the OPEN
position, power will not be provided to energize the 12 Volt heater.
Two Controls of the 12 Volt Heater:
1. Function Select Switch:
• Left Position: Fan only on.
• Middle Position: Heater off.
• Right Position: Both fan and heater on.
2. Thermostat:
• Rotate right or clockwise to increase temperature setting.
• Rotate left or counterclockwise to reduce temperature setting.
NOTE: When the bay heat remote switch is activat-
ed, the bay heater will begin operation at approxi-
mately 40º F. The remote switch will illuminate only
while the heater is operating. Current draw is
approximately 25 amps. Be sure the motorhome is
plugged into shore power to prevent house battery
discharge.
The factory can install an optional cold weather package that consists of one
12 Volt electric heating pad attached to each waste holding tank. Additionally,
12 Volt electric heating pads will be added to the fresh water storage tank, if
the Cold Weather Package was ordered as an option. The same SYSTEMS
HEAT switch that powers the 12 Volt bay heater controls all of the 12 Volt elec-
tric heating pads. The electric heating pad operation is controlled by an internal
thermostat designed to turn on at 44° F. and off at 64° F. When outside ambient
temperatures approach 44° F. the 12 Volt electric pads should be turned ON.
CAUTION: It is the owner's responsibility to make sure there
is liquid in the fresh water and waste storage tanks prior to
using the bay heat system. Damage to the heat pads or hold-
ing tanks may occur if the tanks are empty.
CAUTION: Turn OFF power to pads when dumping the
holding tanks, plugging motorhome into shore power and
when starting the electric generator to prevent damage to the
pad thermostat. This also applies to winterizing the
motorhome.
Water Systems
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DIPLOMAT
6•182
Bay Heater
Operation
Cold Weather
Package (Optional)
OM040389.eps
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