A-Maize-Ing Heat NRP620-10, Руководство пользователя

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NRP620-9 OMEPAPV20161017 (ENGLISH) REV 1
Page 33 of 42
Problem Possible Cause Possible Corrective Action
Furnace
overheating Fuel feed rate too high  Increase the Variable BTU Timer “OFF”
time
 Decrease the Variable BTU Timer “ON”
time
Furnace
overheating If used with another furnace, air
back feeding from the other heat
source may cause overheating. Consult with a heating contractor to install
a device that prevents hot air from feeding
back into the heating appliances.
Furnace
overheating The hot air output, or cold air
return connections are restricted
or are less than 196 square
inches.  Confirm that the hot air output and cold
air return are 196 square inches.
 Check/replace air filter.
 Check for obstructions in the ductwork.
Furnace
overheating Draft is too high  Check the barometric damper for proper
adjustment. A second damper may be
required in some instances.
 Consult with a heating contractor to check
the flue and chimney operation.
Smoke is emitted
during the low fire
cycle There is not enough draft.  Check the barometric damper for proper
adjustment to provide sufficient draft
during the low fire cycle.
 Check the flue and chimney installation.
Improper placement of the stack can
cause backflow down the chimney.

Check the type of vent pipe. In extremely
cold conditions, a poorly insulated vent
pipe can cool and cause air to travel back
into the furnace.
Smoke is emitted
during the high
fire cycle High pressure in the burn
chamber.  Check that there is fuel in the fuel feed
system.
 Check that the air bypass is not
obstructed.
 Check the barometric damper for proper
adjustment to provide sufficient draft
during the high fire cycle.
 Check the flue and chimney installation.
Improper placement of the stack can
cause backflow down the chimney.

Check the type of vent pipe. In extremely
cold conditions, a poorly insulated vent
pipe can cool and cause air to travel back
into the furnace.