Detroit Radiant Products Company SS Series - Manual (Page 15)

NOTICE
Bypassing any switch is intended for testing purposes only. Do not leave switch bypassed
during normal operation or the heater’s built-in safety mechanisms will be compromised.
Is 120V coming
to the fan?
Check for loose wiring
or resistance in hose
connection to pressure
switch. Are they ok?
The heater is equipped with a safety pressure
switch. This differential switch, located in
the valve compartment, is a normally open
pressure switch. Temporarily place jumpers
across the terminals of the switch (Be sure to
reinstall the burner control box cover).
Does the light energize?
4.0 Troubleshooting Guide
Key
Start
Question
Process
Question
Corrective
Action
DX2 Series
Yes
No
The fan is faulty
and must be
replaced.
Correct
wiring.
Repair.
No
Yes
Yes
Replace faulty light.
No
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.
Is resistance through
the ignitor 50-400
Ω ?
Replace
ignitor.
No
Consult
factory.
Yes
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