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6 Start-up
Installation & Service Manual
To Turn Off Gas to Appliance
1. Set the thermostat to the OFF position.
2. Turn off all electric power to the appliance if service is to
be performed.
3a. 90,000 - 135,000 and 399,999 - 500,000 Btu/hr models,
rotate the gas control knob on the gas valve clockwise to
the “OFF” position. Do not force.
3b. 180,000 - 360,000 Btu/hr models, rotate the gas control
knob on the gas valve clockwise to the line on the collar
around the knob. Depress the knob and continue
rotation to the “OFF” position. Do not force.
ƽ WARNING
Should overheating occur or the gas fail to
shut off, turn off the external manual gas
valve to the appliance.
Safety Shutoff Test for Spark
Ignition Pilot System
1. Turn “OFF” gas supply to the appliance.
2. Turn thermostat to highest setting.
3. Turn electric power “ON”.
4. Pump relay pulls in to start pump.
5. The ignition will begin sparking at the pilot.
6. The ignition module will lock out after the 90 second
trial for ignition period on the 90,000 through
399,999 Btu/hr models and after the 15 sec ond trial for
ignition period on the 500,000 Btu/hr model.
7. Immediately call a qualified serviceman or
in stall er to repair an ignition system that fails to
lock out and properly shut down burner operation.
8. After successful completion of the test, re ad just the
thermostat to normal setting.
9. Turn “ON” gas supply.
10. Turn power “OFF” then “ON” to reset ignition module.
11. If ignition system fails to operate properly, re pair work
must be performed by a qualified serviceman or installer.
Intermittent Pilot Spark Ignition
System (F9/M9)
The ignition module is not repairable. Any mod i fi ca tion or
repairs will invalidate the warranty and may create hazardous
conditions that result in prop er ty damage, personal injury, fire,
explosion and/or toxic gases. A faulty ignition module must be
re placed with a new module.
Ignition and Control Timings
F1 Standing Pilot Models (thermocouple supervised)
Pilot Flame Failure Response Time - 180 Seconds Maximum
F9 Intermittent Spark Ignition Pilot Mod els
Pilot Trial for Ignition Period - 90 Seconds (90,000 through
399,999 Btu/hr models)
Pilot Trial for Ignition Period - 15 Seconds (500,000 Btu/hr
model)
Pilot Failure Response Time - 0.8 Seconds at less than 1.0 µA
flame current
Pump Delay Timing (Standard on Water Heaters and Optional
on Boilers) - 30 Seconds after burner shut down
Freeze Protection
1. For water heaters and boilers that utilize the pump delay
option, if either the inlet sensor or the optional multi-
purpose temperature sensor reads below 40°F, the pump
relay will turn ON. When the temperature rises above 50°F
the pump relay will turn OFF.
2. Location - Heating boilers and water heaters must be
located in a room having a temperature safely above
freezing [32°F(0°C)].
3. Caution - A room where the appliance is installed and
operating under a negative pressure may experience a
downdraft in the flue of an appliance which is not firing.
The cold outside air pulled down the flue may freeze a heat
exchanger. This condition must be cor rect ed to provide
adequate freeze protection.
4. Freeze protection for a heating boiler or hot water supply
boiler using an indirect coil can be provided by using
hydronic system antifreeze. Follow the manufacturers
instructions. DO NOT use un di lut ed or automotive type
antifreeze.
5. A snow screen should be installed to pre vent snow and ice
accumulation around the appliance vent ing system in cold
climates.