Instructions / Assembly

ManualsBrandsUnbranded ManualsCommercial76 Gal. Tall 3 Year 199,900 BTU LP Gas Commercial Water Heater

YES

CAUTION

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. VERIFY PROP-

ER OPERATION AFTER SERVICING!

Section 3... the “IGNITION” LED

“System Sentinel” Troubleshooting Guide

Did the Damper Assembly

fully open?

Check Damper for obstruc-

tions—remove if necessary.

Did Damper fully open?

Is 24 VAC power present

between the Blue and Gray

wires in the Polarized Plug at

Damper Assembly?

1. Remove Ignition Cable and check for good

continuity, replace if necessary.

2. Check Ignitor Electrode gap for proper

spacing (1/8” to 5/32”). Correct if necessary.

3. Examine Ceramic Insulator on Pilot Assem-

bly for cracks. Replace if cracks are evident.

If all of the above components check okay,

replace Ignition Control Module.

Is 24 VAC present between the

Gray ground wire and the Red 24

V wire connected to the Ignition

Control Module?

Check continuity of Red

and Gray wires between

Damper Assembly and Igni-

tion Control Module. Is con-

tinuity “good”?

Remove Damper Drive

Motor cover; is the green

“CALL FOR HEAT” LED

illuminated?

Damper Assembly is defective and must be replaced. The water heater may still be used until a replacement Damper Assembly can be

installed by following these steps:

Turn off power to the water heater at the main power switch located on the side of the control enclosure. Order a replacement Damper Assembly. With power still off,

remove Damper Drive Motor cover and move the Service Switch located to the right of the the motor from the ”NORMAL” position to the ”SERVICE” position. Using a stan-

dard flat screwdriver, rotate the slotted white knob, located below the motor, counter-clockwise until the damper blade is in the open (fully vertical) position. Replace cover

and turn power on at the main power switch located on the side of the control enclosure. The heater should now attempt its firing sequence.

* Denotes these boxes are for use with the “Power Assist Burner & Xtreme models” only.

Is Spark Ignitor operating?

(Can sparking be heard?)

The System Sentinel Panel is

defective and must be replaced.

Repair or replace the Wiring Har-

ness

Refer to Troubleshooting

Guide, Section 2...the “THER-

MOSTAT” LED to determine if

Thermostat is operable. Repair

or replace if required.

Ignition Control Module is defec-

tive and must be replaced.

The Thermostat has called for

heat, the Damper Assembly has

fully opened, and 24 VAC power is

being supplied to the Ignition Con-

trol Module and the ignition

sequence will begin.

YES

Is the “IGNITION” LED Illuminated?

Is the green “IGN GAS

PWR” LED illuminated?

*Is 24 VAC present

across coil of relay?

*Is blower operating?

*Relay is defective

and must be replaced.

*Blower is defective

and must be replaced.

*Relay is defective

and must be replaced.

*Pressure switch is

defective and must

be replaced.

*Pressure switch is

defective and must

be replaced.

*Is there continuity

across normally

closed pole and

common pole of

pressure switch?

*Is there 120 VAC

across Brown wire

and Blue wire of

blower?

*Is there 24 VAC

present between

the common pole

and the normally

open pole of the

pressure switch?

YES