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The following information will describe the Sequence of Operation
for this water heater.
1. Switch power on to unit.
2. Thermostat calls for heat.
3. UGb send PWM signal to blower to start the blower at high pre-
purge speed.
4. The blower pressure switch is closed, 24VAC power is applied to
the Ignition Control Module.
5. 20 seconds later blower starts to slow down to a slow ignition
speed preparing for ignition process.
6. 30 seconds after being energized, the Ignition Control provides
power to the Spark Igniter and opens the Gas Valve.
7. Ignition Control maintains spark for up to 4 seconds and monitors
Flame Sensor to determine if burner is lit.
lighting & operating laBel
BEFORE OPERATING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED FROM ALL LINES.
A.
This appliance does not have a pilot. It is equipped with
an ignition device which automatically lights the burner.
Do not try to light the burner by hand.
B.
BEFORE OPERATING smell all aroung the area for gas.
Be sure to smell next to the floor because some gas is
heavier than air and will settle on the floor.
WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance.
Do not touch any electric switch;
do not use any phone in your building.
Immediately call your gas supplier from a neighbor's
phone. Follow the gas suppliers instructions.
1.
STOP! Read the safety information
above on this label.
2.
Set the ON/OFF switch on the control box to
the "OFF" position.
3. Set the thermostat to the lowest setting.
4. This appliance is equipped with a device which
automatically lights the burner.
DO NOT TRY TO LIGHT THE BUNER BY HAND.
5.
Wait five (5) minutes
If you then smell gas,
in the safety information above on this label. If
you don't smell gas, go to the next step.
6. Turn on all electrical power to the appliance.
7. Set the ON/OFF switch on the control box to
the "ON" position.
1. Set the thermostat to the lowest setting.
2. Set the ON/OFF switch on the control box to
the "OFF" position.
seQuenCe of operation
F
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O
U
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A
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Y T
WARNING:
If you do not follow these instructions exactly, a fire or
explosion may result causing property damage, personal injury
or loss of life.
O
P
E
R
A
to clear out any gas.
STOP! Follow "B"
TO TURN OFF GAS TO APPLIANCE
8. If the Flame Sensor does not detect a strong enough flame, the
Ignition Control shuts off the Gas Valve and allows the blower to
purge the unit for 30 seconds. At that time, the Ignition Control
restarts with step 6. It will try and ignite the main burners 2 more
times. If the unit does not light, the Ignition Control will wait 15
minutes and then restart at step 6. This cycle will continue until the
unit lights or the power is shutoff to the unit.
9. If the Flame Sensor detects a strong flame, the Ignition Control
will energize the main gas valve output, which will cause the
blower to run at a pre-determined high speed until call-for-heat
is removed.
10. Once the unit is satisfied, the Thermostat will shut off the blower,
Gas Valve and Ignition Control and the unit will be in standby
mode until another call for heat is initiated by the thermostat.
See the flow chart on page 27 for more detailed information.
R
E
A
D
B
F E
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If you cannot reach your gas supplier, call the fire
department.
C. Use only your hand to push the control buttons. Never use
tools. If the control buttons will not push in, don't try to
repair them, call a qualified service technician. Force or
attempted repair may result in a fire or explosion.
D. Do not use this appliance if any part has been under water.
Immediately contact a qualified installer or service agency
to replace a flooded water heater. Do not attempt to repair
the unit. It must be replaced!
T
N I
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T
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U
C
8. Set the thermostat to the desired setting.
CAUTION: Hotter water increases the risk
of scald injury. Consult the instruction
manual before changing temperature.
9. If the appliance will not operate, follow the
instructions "TO TURN OFF GAS TO
APPLIANCE" and call your technician or gas
supplier.
WARNING: TURN OFF ALL ELECTRIC
POWER BEFORE SERVICING.
ON
3. Turn off all electrical power to the appliance
if service is to be performed.
figure 23.
26
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OFF
FLAMMABLE
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