UTICA BOILERS UH15B Series Installation, Operation & Maintenance Manual page 34

For troubleshooting only. Verify damper is in
Note
open position. Use service switch to keep
damper in open position. Place jumper between
2 & 3. If appliance fires, remove jumper and
plug receptacle back into damper controller
plug. If appliance does not fire, replace damper
motor assembly. Do not replace pipe assembly.
If damper motor assembly is not available,
place service switch in hold open position. This
should keep damper in open position and allow
customer to have automatic heat. Return or
replace the motor assembly at your convenience.
Motor assembly carries 18 month limited
commercial warranty from the original date of
purchase. (Refer to form #4294 on vent damper
manufacturers website). Pipe assembly is not
warranted.
Trouble Shooting with Jumper Wire In Place
Problem Possible Cause
1. Is gas turned on
NO POWER
2. Operating limit, pressure control, low water cut off not on.
Between 4 & 1
3. Blocked vent switch or flame roll out switch tripped
Between 4 & 2
4. Loose or broken connection
Between 4 & 3
5. Defective component in appliance after vent damper
Damper OPEN
NO COMBUSTION
1. Damper blade obstruction
2. Damper pipe egg shaped, out of round/binding.
Damper Sticks
3. Crimped end of vent piece inserted in too far
1. Defective damper motor assembly
Damper Rotates
Continuously
APPENDIX B - VENT DAMPER TROUBLESHOOTING
Recommended Solution
1. Verify gas is on
2. Verify operating limit, pressure control or low water cut off is
on
3. Reset or replace blocked vent switch or flame roll out switch
4. Tighten, repair, or replace connection
5. Replace defective component in appliance
1. Clear the obstruction
2. Restore to damper pipe to round, verify not binding.
3. Correct the condition
1. Replace damper motor assembly
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