Maintenance

GAS BURNERS
Inspect the burner for general cleanliness. If the burner
requires cleaning, clean with a stiff brush (not a wire brush).
Inspect inside of burner tubes as much as possible. During
the summer months it is not uncommon to find that
spiders or mice have taken up residence inside the burner.
Inspect burner for proper location making sure that it is
properly aligned and securely fastened.
VENT SYSTEMS
Check to make certain vent system is clear and free of
any obstructions.
Be sure all connections are secure and tight.
Inspect the entire vent system for signs of corrosion,
damage, and all potential issues that could lead to vent
products entering the heated space or vent products
recirculating into combustion air.
Clean vent pipe and clean out cap, if necessary.
START-UP
Standing Pilot Systems - Turn off the power to the unit. Turn on the gas to the unit. Turn the gas valve control knob to
the “pilot” position. With the gas valve control knob in the “pilot” position, manually depress the knob and light the pilot.
After 30 seconds, release the control knob and assure the pilot remains lit. Next turn the gas valve control knob to the
“On” position. Restore power to the unit and cycle the unit via the unit thermostat to assure it operates correctly.
Intermittent Pilot System - Turn off the power to the unit. Remove the wire lead from the “main valve” terminal of the
gas valve and protect the wire to prevent shorting. Then turn the gas valve control knob to the “On” position. Turn on the
gas to the unit and restore power. Cycle the unit via the thermostat and observe if a pilot flame has been established
and if so, that it remains on. Next turn the thermostat down and observe if the pilot flame has been extinguished. After
checking the electronic ignition pilot system functionality turn off the power to the unit and reconnect the wire lead to the
“main valve” terminal of the gas valve. Restore power and again cycle the unit via the thermostat and observe that both
pilot and main burner ignition occurs. After checking, reset the thermostat to the desired room temperature.
Direct-Spark Systems - Turn off the power and main gas to the unit. Remove the wire lead from the “main valve”
terminal of the gas valve and protect the wire to prevent shorting. Then turn the gas valve control knob to the “On”
position. Restore power to the unit, but do not restore the main gas. Cycle the unit via the thermostat and observe if
the direct-ignition device is energized. (If the unit has a hot surface igniter a yellowish glow will appear in a few seconds.
If the unit has a spark ignition type igniter, a sparking sound will be heard, and a blue spark may be observed and the
igniter). After proving the igniter function, restore the main gas to the unit and again cycle the unit via the thermostat and
observe that both the main burner ignition system is functioning and that main burner ignition occurs. After checking,
reset the thermostat to the desired room temperature.
On all units, observe the burner flame to insure that it is burning clean and not wavering, rolling out, lifting or fluctuating.
If an abnormal flame is observed, check the equipment installation and service manual or report it to your service technician.
RECORD KEEPING
It is recommended that a record be kept of the date the heating equipment was last checked and serviced.
Follow all instructions and cautions in the installation, operation, and service manuals originally provided with the equipment.
Make certain vent support system is secure and
free of damage.
Check joints of vent for signs of condensate leakage.
Water marks down the outside of the vent pipe may
indicate inadequate venting and/or improper vent
insulation in unheated spaces. If water marks are
observed, double check to make certain the proper vent
system has been installed.
If units are the power vented (power exhaust) type,
check all the wiring connections to the power venter
motor, and the vent system safety pressure switch. Also
check the pressure switch sensing tube for blockage
or damage. With the main gas turned off, cycle the
thermostat to check the operation of the power venter,
and verify the safety pressure switch is functioning.
Check the exterior components of the vent system
(exterior vent extensions, vent weather caps,
combustion air intake weather caps, etc.) to assure
they have not been compromised, they are in proper
position, and that there are not any blockages at the air
intakes or vent discharges of the venting system.