Raypak 260-401 Installation And Operating Instructions Manual

Contents

PILOT BURNER FLAME (IID UNITS)PILOT BURNER FLAME (STG PILOT UNITS)CONTROLSCheck all controls to see that they are operational.To check electronic safety (IID Models) , turn off mainburner. Observe pilot burner when shutting off pilot gas.Ignition spark should go on. Main gas valve will also dropout.High Limit Switch - to check high limit switch, turndial setting down to a point slightly below the temperatureof the water leaving the heater. The reset button shouldsnap out and the burner should shut off. Reset dial to 30°Fto 40°F above desired operating temperature, and pushreset button. Burner should light.LOW NOx HEATERS Sizes 181 to 401The Raypak Low Nox Heater is offered as a model W1-ON-OFF firing.The boilers are certified and tested under the ANSIZ21.10.3 Standards for hot water heaters.The boiler should be installed to meet all local codes,the National Fuel Gas Code Z223.1 and with theNational Electrical Code, ANSI/NFPA 70.23Fig # 9361OPERATIONOn call for heat, the ignition system, consisting of anelectronic spark module, gas pilot system is energized.Providing pilot is proven blower will start running, themain gas valve will open and the boiler will operate.When the operating control is satisfied the boiler willshut 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 bewithin the lockout timing period (15 or 90 seconds).d. Turn control down to end call for heat and wait 60seconds on lockout models before beginning step3.3.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 andthe blower will begin running.b. Heater will operate until call for heat is satisfied.BURNER ADJUSTMENTThis burner assembly does not require any primary airadjustments.VISUAL INSPECTIONFlame can be observed through the slot opening abovethe plenum. Flame color is blue and evenly spread onthe top surface of the burner. At least every threemonths a visual inspection should be made of theburners. In case flame lifting is observed on the burner,check gas pressure on manifold and static pressure inplenum. Gas pressure in manifold should be 3.9" W.C.and static pressure in plenum should be greater than0.5" W.C.ELECTRICALBe sure that electrical service to the boiler has properoverload fuse or circuit breaker protection, wire sizeand connections which comply with all applicablecodes.HIGH GAS PRESSURE SWITCHPressure switch senses high pressure and automati-cally shuts down burner if abnormal pressure exists.\Fig. #8236.0PRESSURESWITCHGAS MANIFOLD