PILOT BURNER FLAME (IID UNITS)
PILOT BURNER FLAME (STG 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.
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 temperature, and push reset button. Burner should light.
LOW NOx HEATERS Sizes 181 to 401
The Raypak Low Nox Heater is offered as a model W1-
The boilers are certified and tested under the ANSI Z21.10.3 Standards for hot water heaters.
The boiler should be installed to meet all local codes, the National Fuel Gas Code Z223.1 and with the National Electrical Code, ANSI/NFPA 70.
OPERATION
On call for heat, the ignition system, consisting of an electronic spark module, gas pilot system is energized. Providing pilot is proven blower will start running, the main gas valve will open and the boiler will operate. When the operating control is satisfied the boiler will shut down.
START-UP PROCEDURES (S8610B)
1.Turn on power to the boiler with gas supply off. 2.Check ignition module as follows:
a. Set the thermostat or controller to call for heat. b. Watch for continuous spark at the pilot burner. c. Check the ignition spark operation. Time must be
within the lockout timing period (15 or 90 seconds). d. Turn control down to end call for heat and wait 60 seconds on lockout models before beginning step
3.
3.Turn on gas supply.
4.Set controller to call for heat. 5.System should start as follows:
a. Spark will turn on and pilot gas valve will open and the blower will begin running.
b. Heater will operate until call for heat is satisfied.
BURNER ADJUSTMENT
This burner assembly does not require any primary air adjustments.
VISUAL INSPECTION
Flame can be observed through the slot opening above the plenum. Flame color is blue and evenly spread on the top surface of the burner. At least every three months a visual inspection should be made of the burners. In case flame lifting is observed on the burner, check gas pressure on manifold and static pressure in plenum. Gas pressure in manifold should be 3.9" W.C. and static pressure in plenum should be greater than 0.5" W.C.
ELECTRICAL
Be sure that electrical service to the boiler has proper overload fuse or circuit breaker protection, wire size and connections which comply with all applicable codes.
HIGH GAS PRESSURE SWITCH
Pressure switch senses high pressure and automati- cally shuts down burner if abnormal pressure exists.
PRESSURE
SWITCH
GAS MANIFOLD
Fig # 9361 | \Fig. #8236.0 |
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