506725-01
Page 34 of 48
Issue 1109
Unit Start-Up
FOR YOUR SAFETY READ BEFORE OPERATING
Do not use this furnace if any part has been underwater.
A flood-damaged furnace is extremely dangerous.
Attempts to use the furnace can result in fire or
explosion. Immediately call a qualified service technician
to inspect the furnace and to replace all gas controls,
control system parts, and electrical parts that have been
wet or to replace the furnace, if deemed necessary.
WARNING
Before attempting to perform any service or
maintenance, turn the electrical power to unit OFF at
disconnect switch.
CAUTION
BEFORE LIGHTING
the unit, smell all around the furnace
area for gas. Be sure to smell next to the floor because
some gas is heavier than air and will settle on the floor.
The gas valve on the unit is equipped with a gas control
switch (lever). Use only your hand to move switch. Never
use tools. If the switch will not move by hand, do not try to
repair it. Force or attempted repair may result in a fire or
explosion.
Placing the furnace into operation:
This furnace is equipped with an automatic hot surface
ignition system. Do not attempt to manually light burners on
this furnace. Each time the thermostat calls for heat, the
burners will automatically light. The ignitor does not get hot
when there is no call for heat on these units.
Danger of explosion. Can cause injury
or product or property damage. Should
the gas supply fail to shut off or if
overheating occurs, shut off the gas
valve to the furnace before shutting off
the electrical blower deck, before
performing any service procedure.
WARNING
INTEGRATED CONTROL
(Automatic Hot Surface Ignition System)
FIGURE 49
HEAT BLOWER
OFF DELAY JUMPER
DIAGNOSTIC CODE
RECALL BUTTON
TERMINAL DESIGNATIONS
HUM
L1
XFMR
CONT
EAC
COOL
HEAT
PARK
NEUTRALS
Humidifier (120 VAC)
Input (120 VAC)
Transformer (120 VAC)
Blower - Continuous Fan (120 VAC)
Electronic Air Cleaner (120 VAC)
Blower - Cooling Speed (120 VAC)
Blower - Heating Speed (120 VAC)
Dead terminals to park alternate spd taps
Neutral terminals (120 VAC)
5 AMP
FUSE