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5. The blower door is in place, closing the
door switch in the line voltage circuit.
6. The gas line has been purged and all
connections are leak tight.
Start-up Procedures
After all of the above checks have been made:
1. Set the thermostat to the lowest setting.
2. Close the disconnect(s) to provide line
voltage to the furnace.
3. Follow the procedures given on the
operating instruction label attached to the
furnace.
4. Set
the
thermostat
temperature and verify the operating
Common
Leads
Connect Neutral
Lead of Electronic
Air Cleanerand/or
Humidifier Here.
5. After the furnace has run for approximately
Verifying and Adjusting Firing Rate
The firing rate must be verified for each
installation to prevent over-firing the furnace.
Follow the procedure below to determine the
firing rate.
1. Shut off all other gas fired appliances.
above
room
2. Start the furnace and allow it to run for at
3 Amp Fuse
COM
24 V
9
6
3
8
5
2
7
4
1
Neutrals
Unused Motor
6
3
5
2
4
1
Humidifier Tap
(.5A@ 120 VAC)
Figure 12. Integrated Control
sequence. (See the Sequence of
Operation).
five minutes, set the thermostat below
room temperature and verify steps (9)
through (11) of the Sequence of
Operation.
least three minutes.
Blower Off
Timing
TWIN
(Yellow)
(Red)
Leads
Electronic Air Tap
(.5A@ 120 VAC)
Cooling Speed Tap
Heating Speed Tap
Twinning
Terminal
Flame
Signal
Light
Status
Light
19
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