Reliance Water Heaters 11-03 Operating cont’d, Check for Leaks, Water Heating Ignition Sequence

Operating (cont’d)

WARNING

BEFORE OPERATING [PROPANE (L.P.) GAS WATER HEATERS]: Propane (L.P.) gas is heavier than air. Should there be a leak in the system, the gas will settle near the ground. Basements, crawl spaces, skirted areas under manufactured (mobile) homes (even when ventilated), closets and areas below ground level will serve as pock- ets for the accumulation of this gas. Before attempting to operate the water heater or turning a nearby electri- cal light switch, be absolutely sure there is no accumu- lated gas in the area. Search for odor of gas by sniffing at ground level in the vicinity of the appliance. If odor is detected, follow the steps indicated at “For Your Safety” on the cover page of this manual, then leave the premises.

Operating instructions are located on front of the water heater, above or to one side of the gas control valve. See page 23.

WARNING

AN ODORANT IS ADDED TO THE GAS USED BY

THIS WATER HEATER. FOR YOUR SAFETY

IF YOU SMELL GAS:

1.Do not try to light any appliance.

2.Do not touch any electrical switch; do not use any phone in your building.

3.Immediately call you gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.

4.If you cannot reach your gas supplier, call the fire department.

CHECK FOR LEAKS

Be sure to check all your gas pipes for leaks before operat- ing your water heater. Use a soapy water solution, not a match or open flame. Check the factory gas fittings when the main burner is turned “ON”.

WATER HEATING IGNITION SEQUENCE

(Make sure gas and electric power are connected properly)

1.The ignition control module is powered and monitors the system, waiting for a call for heat from the thermostat.

2.The thermostat calls for heat by reading a resistance value within a given range directly proportional to water temperature.

3.The control module:

a)Checks the pressure switch for an open circuit.

b)Energizes the blower.

c)Checks the pressure switch for a closed circuit to prove draft.

d)Sends line voltage to the hot surface igniter with a 20-second warm up period.

e)Opens the gas valve and checks the sensing rod for flame.

4.The burner heats the water to the desired thermostat setting.

a)The resistance in the thermostat rises to the value selected by the temperature control knob.

b)The control module closes the gas valve and 5 seconds later, removes power from the blower.

5.Cycle is completed.

CONTROL SEQUENCE - HOT SURFACE DIRECT IGNITION

Pre-purge	5 sec.
HSI Warm-up	20 sec.
Ignition Activation Period	4 sec.
Flame Recognition Period	1sec.
Ignition Trial	4 sec.
Interpurge	5 sec.
Post-purge	5 sec.
Retries	2
Reset from Lockout	1 hr.
Flame Sensing (Nominal)
HSI Off/Run Mode	4.0 µ DC

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