Gas Log Set Installation

22
NBST27 Unvented Gas Log Set
Monessen • NBST27 Gas Log Set Installation/Owner's Manual • 81D3032 • Rev A • 08/16
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
ODS/pilotlights,butamegoesoutwhen
control knob is released.
Control knob not fully pressed in. Press in control knob fully.
Control knob not pressed in long enough.
After ODS/pilot lights, keep control knob
pressed in for 30 seconds.
Manual shutoff valve not fully open. Fully open manual shutoff valve.
Thermocouple connection loose at con-
trol valve.
Hand tighten thermocouple connection
until snug, then tighten
1
⁄4 turn more.
Pilotamenottouchingthermocouple,
which allows thermocouple to cool,
causingpilotametogoout.Thisprob-
lem could be caused by either low gas
pressure, or a dirty or partially clogged
ODS/pilot.
Contact local gas company.
Thermocouple damaged. Replace thermocouple.
Control valve damaged. Replace control valve.
Burner does not light after ODS/pilot is lit.
Burneroriceisclogged. Cleanburnerorreplaceburnerorice
Burneroricediameteristoosmall. Replaceorice.
Inlet gas pressure is too low. Contact local gas company.
Burnerbackresduringcombustion.
Manifold Pressure is too low. Contact local gas company.
Burneroriceisclogged. Cleanburnerorreplaceburnerorice.
Slight smoke or odor during initial oper-
ation.
Burneroriceiscloggedordamaged. Cleanburnerorreplaceburnerorice.
Burner is damaged. Replace burner.
Gas regulator is defective. Replace gas regulator.
Logs appear to smoke after initial oper-
ation.
Vapors from paint or curing process of
logs.
1. Problem will stop after a few hours
of operation. Run the heater with the
damper open if you have one, or open a
windowfortherstfewhours.
OR
2. Log heater is intended to be smoke-
less.TurnOFFheaterandcallqualied
service person.
Heater produces a whistling noise when
burner is lit.
Turning control knob to HIGH position
when burner is cold.
Turn control knob to LOW position and
let warm up for a minute.
Air in gas line.
Operate burner until air is removed from
line. Have gas line checked by local gas
company.
Dirtyorpartiallycloggedburnerorices. Cleanburnerorreplaceburnerorice.
No gas to pilot.
LP regulator shut down due to inlet pres-
sure too high.
1. Verify LP tank regulator is installed and
set at 11" to 13" w.c.
OR
2. Replace regulator on heater.
If the gas quality is bad, your pilot may not stay lit, the burners may produce soot and the heater may
backre when lit. If the gas quality or pressure is low, contact your local gas supplier immediately.
WARNING