Raypak 0133-4001 WH, NH manual After START-UP, Inspection Procedures Burners, Controls

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.

PILOT SHUT-OFF VALVE CONTROL SHOWN IN "ON"

POSITION

GAS INLET

TO PILOT

	MAIN GAS
	SHUT-OFF
	VALVE
	SHOWN IN
	THE "ON"
Fig# 8220	POSITION

AFTER START-UP

INTERMITTENT PILOT SYSTEM CHECKOUT PROCEDURE (S8600)

1.Turn on power to the ignition systems and turn gas supply off.

2.Check ignition module as follows:

a.Set the thermostat or controller above room temperature 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 thermostat down to end call for heat and wait 60 seconds on lockout models before beginning step 3.

3.Turn on gas supply.

4.Set thermostat or controller above room temp- erature 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 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.

INSPECTION PROCEDURES

BURNERS

Clean main burners and air louvers free of dust, lint and debris. Keep heater area clear and free from combustibles 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.

Fig# 8144

TYPICAL MAIN BURNER FLAME (Atmospheric models)

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.

High Limit Switch - to check high limit switch, turn dial setting down to a point slightly below the tempera- ture 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.

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