4-11
SECTION 4 –
APPLIANCES AND SYSTEMS
Normally there is an air gap at the top of the
heat exchanger, which acts as a pressure buffer.
In time, however, heated water may expand and
fill this air gap, causing a slight increase in water
pressure. This may cause the P-T valve to “weep”
until the air gap is manually replaced.
To Replace the Air Gap:
1. Turn off the Water Heater switch and
incoming water supply (city water and/or
demand pump).
2. Open a faucet in the motorhome to relieve
water pressure.
3. Pull the handle of the P-T valve straight out
and allow water to flow until it stops.
4. Let the handle of the P-T valve snap shut.
5. Close the faucet and turn on the water supply
before switching the water heater on.
Manually operate the pressure temperature
relief valve at least once a year.
ELECTRONIC THERMOSTAT
(Heating and Cooling)
The Electronic Thermostat (located near the
monitor panel) controls the propane furnace, as
well as the roof air conditioners in your coach.
When controlling the settings from the
Thermostat, you must manually press the Zone
Button and set to your preference by toggling to
either Zone 1, Zone 2, Zone 3 (if equipped), or all
zones simultaneously.
Models 36M
(2 Roof Air Conditioners)
•
ZONE 1 - (1) A/C Unit in Living/Galley Area
•
ZONE 2 - (1) A/C Unit in Bedroom/Bath Area
Models 40R and 42E
(3 Roof Air Conditioners)
•
ZONE 1 - (1) A/C Unit in Bedroom/Bath Area
•
ZONE 2 - (1) A/C Unit in Living/Galley Area
•
ZONE 3 - (1) A/C Unit in Front Cab Area
CAUTION
Hot water can escape from tank causing
injury. Operate this valve only when the
tank water is cold.
Water Heater Exterior Service Access
-Typical View
• Lift handle straight out to open P-T
valve when water heater is cold.
-Typical View
