Sequence of Operation
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.Variable Frequency Drive sends power to Blower.
4.Combustion Blower initiates air flow through water heater closing the Prover Switch.
5.Blower runs at low speed for 30 second
6.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
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 allow the unit to operate until the thermostat is satisfied.
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.
FOR YOUR SAFETY READ BEFORE OPERATING
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| WARNING: If you do not follow these instructions exactly, a fire or |
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| explosion may result causing property damage, personal injury |
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| or loss of life. |
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| FLAMMABLE |
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| BEFORE OPERATING: ENTIRE SYSTEM MUST BE FILLED WITH WATER AND AIR PURGED FROM ALL LINES. |
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| A. This appliance does not have a pilot. It is equipped with | If you cannot reach your gas supplier, call the fire | ||||||||||||
| department. | |||||||||||||
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| an ignition device which automatically lights the burner. | ||||||||||||
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| C. Use only your hand to push the control buttons. Never use | ||||||||||||
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| Do not try to light the burner by hand. | ||||||||||||
| B. BEFORE OPERATING smell all aroung the area for gas. | tools. If the control buttons will not push in, don’t try to | ||||||||||||
| repair them, call a qualified service technician. Force or | |||||||||||||
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| Be sure to smell next to the floor because some gas is | ||||||||||||
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| attempted repair may result in a fire or explosion. | ||||||||||||
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| heavier than air and will settle on the floor. | ||||||||||||
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| D. Do not use this appliance if any part has been under water. | ||||||||||||
| WHAT TO DO IF YOU SMELL GAS | |||||||||||||
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| Do not try to light any appliance. | Immediately contact a qualified installer or service agency | |||||||||||
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| to replace a flooded water heater. Do not attempt to repair | |||||||||
Do not touch any electric switch; | the unit. It must be replaced! | |
do not use any phone in your building. | ||
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Immediately call your gas supplier from a neighbor's |
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phone. Follow the gas suppliers instructions. |
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OPERATING 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 |
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If you then smell gas, |
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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.
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 
OFF
TO TURN OFF GAS TO APPLIANCE
1.Set the thermostat to the lowest setting.
2.Set the ON/OFF switch on the control box to the “OFF” position.
3.Turn off all electrical power to the appliance if service is to be performed.
Figure 23.
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