Raypak RAYTHERM 0133-4001 - Manual (Page 29)

PILOT BURNER FLAME (IID UNITS)
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.
TYPICAL MAIN BURNER FLAME
Fig. # 8144
NOTE: Modulating burner flame varies in height from
approximately 1/4" at low fire to approximately 4" at
high fire.
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
leaving 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 depos-
its, 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
condition of pump impeller. Check condition
of bearing by attempting to move impeller
from side to side. Replace any parts showing
wear.
c. Check pump coupler for wear and vibration.
7. Check flow switch paddle.
8. Clean room air intake openings to ensure ad-
equate flow of combustion and ventilation air.
CAUTION: Combustion air must not be contaminated
by corrosive chemical fumes which can damage the
boiler and void the warranty.
9. Keep boiler area clear and free from combustible
materials, gasoline, and other flammable vapors
and liquids.
*Should be checked monthly. (Takes approximately
15 minutes).
29
PILOT BURNER FLAME
(STANDING PILOT UNITS)
Fig #9336
Fig #8964.1