Raypak RAYTHERM 133-4001 - Manual (Page 29)

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at once. Pilot burner should ignite after gas
reaches the pilot burner.
b. Spark ignition should cut-off when pilot flame
is established.
c. Main gas valve should open and main burner
should ignite after gas reaches the burner
port.
Inspections
Burners
Clean main burners and air louvers of dust, lint and
debris. Keep boiler area clear and free from com-
bustibles and flammable liquids. Do not obstruct the
flow of combustion and ventilation air. Make visual
check of burner and pilot flame. Yellow flame indicates
clogging of air openings. Lifting or blowing flame indi-
cates high gas pressure. Low flame indicates low gas
pressure.
Fig. 41: Typical Main Burner Flame
Modulating burner flame varies in height from approximately 1/4"
at low fire to approximately 4" at high fire.
Fig. 42: Pilot Burner Flame (IID Units)
Fig. 43: Pilot Burner Flame (Standing Pilot Units)
Controls
Check all controls to see that they are operational. To
check electronic safety (IID Models), turn off main
burner. Observe pilot burner when shutting off pilot
gas. Ignition spark should go on. Main gas valve will
also drop out.
To check high limit switch, turn dial setting down to a
point slightly below the temperature of the water leav-
ing the heater. The reset button should snap out and
the burner should shut-off. Reset dial to 30°F to 40°F
above desired operating temperature, and push reset
button. Burner should light.
Suggested Inspection
Schedule
The boiler should be inspected on the first and third
months after initial start-up and then on an annual
basis. If problems are found, refer to Troubleshooting
Guide for additional directions.
1. Remove top of heater and inspect heat exchanger
for soot and examine venting system.
2. Remove rear header and inspect for scale
deposits, and/or accelerated erosion.
*3. Inspect pilot and main burner flame and firing rate.
*4. Inspect and operate all controls and gas valve.
*5. Visually inspect system for water leaks.
*6. a. Oil pump motor and bearing assembly, if oil
cups are provided.
b. Disconnect pump from header and check condi-
tion of pump impeller. Check condition of bearing
by attempting to move impeller from side to side.