Startup And Shutdown; Furnace Startup - Wolf Steel Condo Pack Installation And Operating Instructions Manual

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5. STARTUP AND SHUTDOWN

The Condo Pack is designed to be used with residential single-stage cooling and single-stage heating wall
IOM
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thermostats with automatic or manual mode changeover. Automatic changeover thermostats must include
a deadband to prevent cycling between cooling and heating modes. Single-pole, single-throw thermostats
are not suitable for use with Condo Pack. The unit incorporates a 90-second time delay to keep the indoor
blower operating after cooling is satisfied to reduce operating costs. Indoor blower motor speed for cooling and
heating modes can be altered by changing the motor speed taps on the Endura Pro Motor harness.
5.1

FURNACE STARTUP

This furnace is equipped with a spark ignition (SI) device. Each time that the room thermostat calls for heat, the
SI 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, the installer must use purging equipment and techniques as listed in National and Local Gas codes. Allow
fi ve minutes for any gas to dissipate before continuing with the start-up procedure. Be sure proper ventilation is
available.
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 induced 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.
It is required/mandatory 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 air to be drawn 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.
1� Shut off the electrical power to the unit and set the room thermostat to its lowest setting.
2� Turn the thermostat to HEAT mode.
3� Remove the burner compartment access door.
ENSURE THAT THE MANUAL GAS VALVE SWITCH HAS BEEN IN THE "OFF" POSITION FOR
AT LEAST 5 MIN. DO NOT ATTEMPT TO MANUALLY LIGHT THE MAIN BURNERS.
4� Turn the gas valve switch to the "ON" position.
5. Replace the burner compartment access door.
6� Turn on furnace appliance shut off valve.
7. Restore electrical power to the furnace.
8� Set the room thermostat to a point above room temperature to light the furnace.
9. After the burners are lit, set the room thermostat to the desired temperature.
W415-1307 / B / 03.31.2017
FAILURE TO SEAL DRAIN T-FITTINGS WITH CAPS WILL CAUSE A CARBON
NOTE
WARNING
!
MONOXIDE HAZARD!
IMPORTANT
!
!
H21.0.1
!