69
68
Electric Operation
1. For gas operation refer to Pilot Operation or Electronic Ignition Operation section.
2. For electrical operation, use the switch inside the travel trailer in the utility panel.
3. Completely fill tank with water.
4. Turn switch (Fig. 5-8) located in the travel trailer to the “ON” position.
NOTE
:
Turning the power on in the heater with little or no water covering the heating
element may burn out the element and void the warranty.
5. Check for proper operation. Water temperature should be approximately 140°F
(60°C).
6. If the manual reset high temperature limit switch should operate, reset the switch
(Fig. 5-9) by depressing the button. Use a pencil or other nonmetallic object to
depress the rest button. If the malfunction repeats, contact an authorized Atwood
Service Center or Atwood Service Department.
When cold water is heated in the tank, the pressure will rise. For this reason, a relief
valve (Fig. 5-10) is required for safety in all water heaters, rated at 125° (52° C). It is
normal for this valve to release a small quantity of water during the heating cycle.
Opening a faucet on the hot side will release pressure reducing relief valve dripping.
PRESSURE TEMPERATURE RELIEF VALVE
1
WARNING: Do not plug the pressure-temperature relief valve under
any circumstances.
When cold water is heated in the tank, the pressure will rise. For this reason, a relief
valve (Fig. 5-10) is required for safety in all water heaters rated at 125°. It is normal for
this valve to release a small quantity of water during the heating cycle. Open the hot
water faucet to release pressure which will reduce the dripping from the relief valve.
Flushing Instructions
If your travel trailer is used frequently, or taken to different areas that use various types
of water, it is recommended that the water heater be flushed periodically throughout the
year to prolong the life of the inner tank. The following procedure summarizes the steps
necessary for flushing the water heater inner tank.
To adjust Main Burner (Fig. 5-6):
1. Loosen air shutter screw (Fig. 5-6A).
2. Slide air shutter (Fig. 5-6B) to the right until a small
amount of yellow color appears in the main burner
flame.
3. Move air shutter (Fig. 5-6B) to left until yellow
disappears.
4. Retighten air shutter screw (Fig. 5-6A).
Electric Ignition Operation
1.
To turn D.S.I. on press the rocker switch (Fig. 5-7) to the
“ON” position. Light will come on indicating power to
board. As soon as burner ignites the light in switch will
go off.
2.
If remote switch light stays on longer than fifteen sec-
onds, place remote switch in OFF position and wait five
minutes.
3.
Repeat step one.
4.
When water temperature reaches the permanent set ther-
mostat, flame shuts down. Reignition will occur when
water temperature drops to 100° (38°C) auto-
matically.
5.
For complete shutdown and before servicing:
a. Place remote switch in “OFF” position.
b. Remove red wire from left hand terminal of
ECO switch (ECO to valve).
6.
If heater fails to operate due to high water temperature, the heater will go into a
lockout condition (indicator light on). When water cools, reset by placing switch in
“OFF” position for at least thirty seconds, then return to “ON” position.
7.
If a lockout condition persists contact your dealer, an Atwood service station or
Atwood service department.
NOTE
:
Terminals on switch #2 and 3 supply power to heater. Terminals 4 and 6
supply power to light. Some models may have switch for D.S.I. water heaters
in monitor panel.
Pilot Re-ignite Operation
1. Turn the switch located on the spark module to the “ON” position.
2. Read Pilot Operation Instructions.
1
WARNING:
The pilot relight module and thermostat lighting control
knob must both be in the “OFF” position when refueling the LP tank or
gasoline tank. Fire and/or explosion could result.
3. For complete shut down, turn lighting control knob on thermostat and spark module
switch to the “OFF” position.
Fig. 5-6
Located on
inside sidewall
Fig. 5-7
O
N
O
F
F
ATWOOD
RELIEF
VALVE
A
Fig. 5-8
Fig. 5-10
Fig. 5-9
Summary of Contents for Conventional Travel Trailer 2003
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