INTEGRATED CONTROL
(Automatic Hot Surface Ignition System)
| TERMINAL DESIGNATIONS | |
HUM |
| Humidifier (120VAC) |
LINE |
| Input (120VAC) |
XFMR |
| Transformer (120VAC) |
EAC |
| Electronic Air Cleaner (120VAC) |
COOL |
| Blower − Cooling Speed (120VAC) |
HEAT |
| Blower − Heating Speed (120VAC) |
PARK |
| Dead terminals to park alternate spd taps |
FLAME |
| Flame sensor |
NEUTRALS |
| Neutral terminals (120VAC) |
3 AMP, 32 VAC FUSE
BLOWER OFF
DELAY JUMPER
FIGURE 53
Unit Start−Up
FOR YOUR SAFETY READ BEFORE OPERATING
WARNING
Do not use this furnace if any part has been under- water. A flood−damaged furnace is extremely dan- gerous. Attempts to use the furnace can result in fire or explosion. Immediately call a qualified ser- vice 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.
CAUTION
Before attempting to perform any service or mainte- nance, turn the electrical power to unit OFF at dis- connect switch.
WARNING
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 supply.
BEFORE LIGHTING the unit, smell all around the fur- nace area for gas. Be sure to smell next to the floor be- cause some gas is heavier than air and will settle on the floor.
The gas valve on the ML193DF is equipped with a gas control switch. 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.
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