Unit Start-Up - Lennox ML196UHE Installation Instructions Manual

INTEGRATED CONTROL
(Automatic Hot Surface Ignition System)
RED LED
RECALL BUTTON
Figure 60
TABLE 11
1/4" QUICK CONNECT TERMINALS
120HUM Humidifier 120VAC
LINE 120VAC
XFMR Transformer 120VAC
CIRC Indoor blower 120VAC
EAC Indoor air qualityaccessory 120VAC
NEUTRAL Common 120VAC
HUM24 Humidifier 24VAC
3/16" QUICK CONNECT TERMINALS
COOL Cooling tap 24VAC
HEAT Heating tap 24VAC
FAN Continuous blower 24 VAC
PARK (no power) Park terminal for speed taps
FLAME / FS Flame Sense
24 COM Common 24VAC
BLOWER OFF DELAY
Page 42

Unit Start-Up

FOR YOUR SAFETY READ BEFORE OPERATING
WARNING
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
Danger of explosion. Can cause injury or
product or property damage. If overheating
occurs or if gas supply fails to shut off, shut
off the manual gas valve to the appliance
before shutting off electrical supply.
CAUTION
Before attempting to perform any service or maintenance,
turn the electrical power to unit OFF at disconnect switch.
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 ML196UHE is equipped with a gas
control switch (lever). Use only your hand to move switch.
Never use tools. If the 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:
ML196UHE units are 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.