Install Instructions

FLAME SENSOR

The flame sensor is a probe mounted to the burner/manifold

assembly which uses the principle of flame rectification to deter-

mine the presence or absence of flame.

Burner Flame

Figure 65

ROUBLESHOOTING

ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONS

NOTE: Discharge body’s static electricity before touching

unit. An electrostatic discharge can adversely affect electrical

components.

Use the following precautions during furnace installation and

servicing to protect the integrated control module from

damage. By putting the furnace, the control, and the person

at the same electrostatic potential, these steps will help avoid

exposing the integrated control module to electrostatic

discharge. This procedure is applicable to both installed and

uninstalled (ungrounded) furnaces.

1. Disconnect all power to the furnace. Do not touch the

integrated control module or any wire connected to the

control prior to discharging your body’s electrostatic charge

to ground.

2. Firmly touch a clean, unpainted, metal surface of the

furnace away from the control. Any tools held in a person’s

hand during grounding will be discharged.

3. Service integrated control module or connecting wiring

following the discharge process in step 2. Use caution not

to recharge your body with static electricity; (i.e., do not

move or shuffle your feet, do not touch ungrounded

objects, etc.). If you come in contact with an ungrounded

object, repeat step 2 before touching control or wires.

4. Discharge your body to ground before removing a new

control from its container. Follow steps 1 through 3 if

installing the control on a furnace. Return any old or new

controls to their containers before touching any ungrounded

object.