HeatStar JET Serie Instrucciones De Operacion Y Manual Del Propietario página 13

SECTION 8
Operation & Maintenance
Sequence of Operation
1. T urn the thermostat up. When the thermostat calls for heat,
blower motor will energize.
2. When the motor approaches nominal running RPM, the air
proving switch closes and activates the ignition module.
3. Once the igniter sparks, the gas valve is energized.
4. I f a flame is detected, the gas valve remains open. When the call for
heat is satisfied, and the system control mechanism de-energizes the
burner line voltage supply, the gas valves are turned off.
5. I f no flame is detected, the gas valve is closed, and a purge
period begins. After the purge, the module acts to power the
igniter for a second warm-up period, and a second trial for
ignition period. If flame is still not established, a third and final
purge, warm-up, and trial cycle begins. After three trials, the
module will lockout until reset. Reset is accomplished by removing
power from the module for at least five (5) seconds (thermostat
cycle required.)
6. If flame is established and lost on the first or second trial, the
gas valve is turned off, a purge, warm-up, and trial for ignition
will occur on a three-trial module, only three trials for ignition
are allowed per thermostat cycle.
Maintenance
For best performance, the following maintenance procedures should
be performed before each heating season:
1. Be sure gas and electrical supply to heater are off before
performing any service or maintenance.
2. Check condition of blower scroll and motor. Dirt and dust may
be blown out with compressed air, or a vacuum cleaner may
be used. When using compressed air do not exceed 30 psi.
3. Check condition of burner. Carefully remove any dust or
debris from inside the burner box and the face of the burner
venturi.
4. Inspect the igniter. Replace igniter if there is excessive carbon
residue, erosion, breakage or other defects.
5. Check the inside of the firing tube with a flashlight. If carbon
or scale are present, scrape out the deposits with a wire
brush or rod, or metal plate attached to a wooden pole.
• T ubes and reflectors can be power washed but *DO NOT*
power wash the burner box.
6. Check the vent cap for soot or dirt. After cleaning as
necessary, re-attach the flapper or vent cap to the heater.
7. Check the air intake system, be sure that the top is not
blocked in the attic. Also, empty contents of air intake
system whether your're using trap or flex pipe to the attic.
8. Check to make sure the 4 bolts connecting the tubes to
eachother are tight, re-tighten if needed.
9. Check that the first reflector still has the steel retention wire
connected to the burner box .
10. Check vent cap and fresh air inlet to see that they have not been
blocked during the non-heating season. If either pipe is restricted, the
air switch won't close, resulting in a no-heat situation.
A qualified service agency should be contacted for service
other than routine maintenance.
Enerco | Heatstar AG Series Heater
SECTION 9
Troubleshooting
WARNING
•Do not attempt to service this heater unless you have been
properly trained.
•Troubleshooting this system may require operating the unit
with line voltage present and gas on. Use extreme caution when
working on this heater.
• Failure to follow this warning may result in property damage,
personal injury or death.
The access door may be open when troubleshooting by opening
the two latches located on top of the unit. With the access door
open you will have access to the pressure switch, ignition module,
transformer, and gas valve. If you need to access the burner, igniter,
or motor you will need to take off the cover by unscrewing the
phillips head screws.
CAUTION:
B efore opening the Jet cover for any type of service besure the gas
supply has been shut off at the heater and the electrical cord from
the burner box has been unplugged.
WHAT TO DO IF:
Blower Motor 1. I s the thermostat calling for heat? Is there
Fails to Run: 120V at the motor terminals?
2. C heck blower for obstructions. Replace
blower if necessary.
1. C heck igniter for damage or excess carbon.
Replace if necessary.
2. C heck for obstructions to the air inlet and
outlet.
3. C heck wiring and hose connections to the
air switch. Replace if necessary.
4. C heck voltages at transformer primary and
secondary. Replace transformer or module if
necessary.
Valve Does Not Gas pressure downstream of gas control can
Open: be measured by using a manometer and
connecting to pressure tap on valve.
1. Check to see if gas valve switch heater is ON.
2. S upply gas pressure can be checked at 1/8"
NPT pressure tap on heater external manual
valve.
3. C heck to see if gas control is opening: no
manifold pressure indicates valve is closed.
If the valve is closed, either the gas valve or the
ignition module is faulty.
WARNING: Do not disconnect ground leads
inside heater. Do not interchange grounded
and ungrounded leads on transformer or
ignition module.
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Operating Instructions and Owner's Manual