Startup Procedures; To Start The Furnace - Napoleon 9500 series Installation And Operating Instructions Manual

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17.0

STARTUP PROCEDURES

This furnace is equipped with a HSI (Hot Surface Ignition) device. Each time that the room thermostat calls for
IOM
IOM
heat, the HSI lights the main burners directly. See the lighting instructions on the furnace.
When the gas supply is initially connected to the furnace, the gas piping may be full of air. In order to purge
this air, it is recommended that the ground union be loosened until the odor of gas is detected. When gas is
detected, immediately retighten the union and check for leaks. Allow fi ve minutes for any gas to dissipate before
continuing with the start-up procedure. Be sure propere ventilation is available to dilute and carry away any
vented gas.
During initial start-up, it is not unusual for odor to come out of any room register. To ensure proper ventilation, it
is recommended to open windows and doors, before initial fi ring.
The furnace has a negative pressure switch that is a safety during a call for heat. The induced draft blower must
pull a negative pressure on the heat exchanger to close the negative pressure switch. The induce draft blower
must maintain at least the negative pressure switch set point for the furnace to operate. If the induced draft
blower fails to close or maintain the closing of the negative pressure switch, a "no heat call" would result.
NOTE
It is recommended that the drain trap assembly be primed before the initial startup. Refer to the instructions
on how to prime the condensate trap on the drain piping section in this manual. A dry trap will allow fl ue
gases to fl ow through the recovery coil drain, which will prevent the condensate from draining from the
recovery coil. If enough condensate accumulates in the recovery coil, the recovery coil pressure switch will
sense this condition and break its electrical contacts, and extinguish combustion. If this takes place, the
induced blower will stop after a brief post-purge cycle, the condensate will drain out and fi ll the trap. If the
thermostat is still calling for heat, the ignition sequence will start again after a 5 minute wait.

17.1 TO START THE FURNACE

1. Shut off the electrical power to the furnace and set the room thermostat to its lowest setting.
2. Remove the burner compartment access door.
IMPORTANT
ENSURE THAT THE MANUAL GAS VALVE SWITCH HAS BEEN IN THE "OFF" POSITION
FOR AT LEAST 5 MINUTES. DO NOT ATTEMPT TO MANUALLY LIGHT THE MAIN
BURNERS.
3. Turn the gas valve switch to the "ON" position.
4. Replace the burner compartment access door.
5. Turn on furnace appliance shut off valve.
6. Restore electrical power to the furnace.
7. Set the room thermostat to a point above room temperature to light the furnace.
8. After the burners are lit, set the room thermostat to the desired temperature.
W415-0973 / B / 08.28.13
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H21.1