Brant Radiant Heaters DX2 Series Manual page 55

DX2 Series
Bypassing any switch is intended for testing purposes only. Do not leave switch bypassed
NOTICE
during normal operation or the heater's built-in safety mechanisms will be compromised.
No
Is 120 V coming
to the fan?
Yes
The fan is faulty
and must be
replaced.
Check for loose wiring
or resistance in hose
connection to pressure
switch. Are they ok?
No
Repair.
Is resistance through
Ω
the ignitor 50-400 ?
No Yes
Replace Consult
ignitor. factory.
Start
Correct
Question
wiring.
The heater is equipped with a safety pressure
switch. This differential switch, located in
the valve compartment, is a normally open
Yes
pressure switch. Temporarily place jumpers
across the terminals of the switch (Be sure to
reinstall the burner control box cover).
Does the light energize?
Replace the differential switch after verifying the following:
• Baffle(s) is/are in the radiant tube(s) farthest from the burner.
• The heater, fan blower, squirrel cage, intake and exhaust are free from
dirt and obstructions.
• The 4" air intake pipe does not exceed 20 feet and/or 2 elbows.
• There is not a negative pressure experienced at the area of air intake
(i.e., attic space, high winds, very tight building).
If any of the above are occurring, please address the problem.
55
5.0 Troubleshooting Guide
Key
Process
Question
No
Replace faulty light.
Yes
Corrective
Action