Install Instructions

46
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.
⚠ 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 trial for
ignition period.
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.
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.
6. Shut-down and Draining - If for any rea son, the appliance is
to be shut off, the following precautionary measures must be
taken:
(a) Shut off gas supply.
(b) Shut off water supply.
(c) Shut off electrical supply.
(d) Drain the unit completely. Remove one threaded plug
or bulbwell from the inlet side of the front header and
one from the outlet side of the front header on the heat
exchanger. Blow all wa ter out of the heat exchanger.
(e) Drain pump and piping.