Raypak RAYTHERM 133, Installation & Operating Instructions Manual

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FOR MODELS WITH AUTOMATIC GAS VALVES
1. Close all gas valves. Turn off electric power supply.
Wait five (5) minutes.
2. Open manual pilot valve. Turn on electric power.
Pilot is automatically lighted.
3. Open main gas valve.
4. Set temperature controls to desired temperature.
TO SHUT DOWN
Close all manual gas valves. Turn off electric power.
GAS INLET
PILOT SHUT-OFF
VALVE CONTROL
SHOWN IN "ON"
POSITION
TO PILOT
MAIN GAS
SHUT-OFF
VALVE
SHOWN IN
THE "ON"
POSITION
Intermittent Pilot System
Checkout Procedure (S8600)
After Start-Up
1. Turn on power to the ignition systems and turn gas
supply off.
2. Check ignition module as follows:
a. Set the tankstat to call for heat.
b. Watch for continuous spark at the pilot burner.
c. Time the spark operation. Time must be within
the lockout timing period (15 or 90 seconds).
d. Turn tankstat down to end call for heat and wait
60 seconds on lockout models before beginning
step 3.
3. Turn on gas supply.
4. Set tankstat to call for heat.
5. Systems should start as follows:
a. Spark will turn on and pilot gas valve will open
at once. Pilot burner should ignite after gas reach-
es 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.
INSPECTION
PROCEDURES
burners
Clean main burners and air louvers free of dust, lint
and debris. Keep heater 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 excessively high gas pressure. Low flame indi-
cates low gas pressure.
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.
High Limit Switch - 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 tempera-
ture and push reset button. Burner should light.
Fig. 31: Typical Main Burner Flame (Atmospheric
Models)