Atwood Mobile Products 4-E - Manual (Page 4)

4
FOR A ROBERTSHAW UNITROL ® ( FIG 7)
a. Turn lighting control dial (7-B) to PILOT position.
b. Depress and hold reset push button (7-A) while lighting pilot
burner (7-C).
c. Allow pilot to burn thirty seconds before releasing reset push
button.
d. If pilot does not remain lit, repeat operation allowing longer peri-
od before releasing reset push button.
e. Turn lighting control dial (7-B) to ON position.
f. Set temperature control dial (7-C) at mid-point position between
warm and hot.
g. Close access door.
4. For complete shut down and before servicing, turn gas control knob
( FIG 7-B) to OFF position. When water heater is not in use set tem-
perature control lever (White Rogers ® ) or dial (Robertshaw ® ) to low-
est possible position.
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WARNING
SCALDING INJURY
• Setting temperature control dial at a higher position will produce exces-
sively hot water.
The temperature knob or lever is factory adjusted to its lowest dial set-
ting. We recommended the mid-point position between warm and hot,
as noted above. This will provide for energy efficient operation and
sufficient hot water. Valves for reducing point of use temperature by
mixing cold and hot water are available. Consult a licensed plumber or
local plumbing authority.
5. To Adjust Main Burner ( FIG 4):
1. Loosen air shutter screw (4-A).
2. Slide air shutter (4-B) to right until some yellow appears in main
burner flame.
3. Move air shutter (4-B) to left until yellow disappears.
4. Retighten air shutter screw (4-A).
Read MAINTENANCE AND CARE INSTRUCTIONS
ELECTRONIC IGNITION OPERATION
1. Refer to WIRING DIAGRAM FIG 12. Place remote switch in ON position.
2. If remote switch light stays on longer than 15 seconds, place
remote switch in OFF position and wait 5 minutes.
3. Repeat step one.
4. For complete shut-down and before servicing:
a. Place remote switch in OFF position.
b. Remove red wire from left hand terminal of ECO switch (ECO to
valve).
5. If heater fails to operate due to high water temperature, a lockout
condition occurs (indicator light on). After water cools, reset switch
in OFF position for at least 30 seconds, then turn to ON position.
6. If a lockout condition persists contact an Atwood Service Center.
Read
MAINTENANCE AND CARE INSTRUCTIONS & ELECTRONIC IGNITION
MAINTENANCE
PILOT RELIGHT OPERATION
1. Turn the switch located on the spark module to the ON position.
2. Read PILOT OPERATION instructions.
3. For complete shut down, turn lighting control knob on thermostat
and spark module switch to the OFF position.
Read MAINTENANCE AND CARE INSTRUCTIONS
GAS/ELECTRIC COMBINATION FUNCTION
GAS OPERATION . When the gas switch is turned on, the unit will make three
attempts to light. If for any reason there is no ignition, the unit will
lockout and the red lockout lamp will illuminate. If the thermostat fails,
the ECO will also lockout the unit, requiring resetting. Determine the
reason for no ignition, correct it, and reset the gas ignition sequence
by turning the switch off, then on.
ELECTRIC OPERATION . When the electric switch is turned on, the relay at the
rear of the unit will close and pass 110vac to the element. If the ther-
mostat were to fail, the ECO will open and lockout the system. To cor-
rect, check the thermostat to assure good contact with the tank and
reset the control by turning the electric switch off, then on.
GAS / ELECTRIC OPERATION . The unit can be run in both gas and electric
modes simultaneously for quick recovery. note: if the gas fails to
ignite, the gas mode will lockout, but the lockout lamp will not illumi-
nate since the electric mode is still operational. Should you notice
slow recovery, indicating the gas is not working, turn the electric
switch off. The lamp will then illuminate indicating a lockout has
occurred on the gas side. Correct the problem and turn the switches
back on.
Read MAINTENANCE AND CARE INSTRUCTIONS .
MAINTENANCE AND CARE INSTRUCTIONS
SERVICE CALLS & QUESTIONS
Location and phone numbers of qualified Service Centers can be found
at our website http:/www.atwoodmobile.com or call 574-262-2655 to
have a Service Center List mailed.
ƽ
WARNING
FIRE OR EXPLOSION
• Shut off gas supply at LP container before disconnecting a gas line.
• Keep control compartment clean and free of gasoline, combustible
material, and flammable liquids and vapors.
AFTERMARKET WATER HEATING ELEMENT DEVICES
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WARNING
EXPLOSION / BURN INJURY
• DO NOT alter water heater, it will void warranty.
• DO NOT USE Aftermarket heating elements, they can lack critical safety
controls.
• Use of Aftermarket heating elements can lead to an out of control
heating of water tank and a catastrophic wet side explosion.
The use of any aftermarket heating element devices may also result in
damage to components or water heater. Atwood’s written warranty
states - “failure or damage resulting from any alteration to our water
heater is the owner’s responsibility”. Any alteration, like the addition of
an aftermarket heating element device, will void the warranty.
GENERAL INFORMATION
• LP and Water system must be turned on.
• Have gas pressure tested periodically. Should be set at 11 inches of
water column with three appliances running.
• Drain water heater at regular intervals (at least one time during the
year).
• Drain water heater before storing RV for the winter or when the pos-
sibility of freezing exists.
• Keep vent and combustion air grill clear of any obstructions.
• Periodically, compare flame of main and pilot burners with
FIG 5 and
main burner adjustments in HOW TO OPERATE YOUR WATER HEATER .
• When water heater is not in use set temperature control lever (White
Rogers) or dial (Robertshaw) to lowest possible position. This will
reduce the effects of low outdoor temperatures on calibration of
temperature control mechanism.
ELECTRONIC IGNITION MAINTENANCE
• The water heater comes factory-equipped with a fused circuit board,
which will protect the circuit board from wiring shorts. If the fuse
should activate, the water heater will not operate. Before replacing
the fuse, check for a short external to the board. Once the short is
corrected, replace the 2 amp fuse with a mini ATO style fuse. Do not
install a fuse larger than 3 amps.
• If the fuse is good and the unit is inoperative, check for excessively
high voltage to the unit (more than 14 volts).
• If the previous two steps did not solve the problem, check the ther-
mal cut-off ( FIG 3-I). The thermal cutoff is a device installed in the
power supply line. This device will shut off electrical power and stop
heater operation when activated. For example, if an obstruction
within the flue tube should occur, as described in the Preventative
Maintenance section, the burner flame/heat may contact the cutoff,
resulting in a melting of the fuse element incorporated in the ther-
mal cutoff. In order to restore power and proper operation of the
water heater, the obstruction must be removed and the thermal cut-
off must be replaced.