Raypak WH 0135A Installation & Operating Instructions Manual

Also see for Econopak WH-0090: Installation and operating instructions

20Testing the Ignition Safety Shut-offThe ignition system safety shutoff must be tested byconducting the following tests:For Standing Pilot Systems1. With the main burners on, remove the pilot adjust-ment cover screw.2. Insert a small slot screw driver and turn the adjust-ment screw clockwise until pilot flame goesout. Count and note number of turns made.3. Gas valve will shut off main burners after aboutthree (3) minutes. End of test. If the gas valve willnot shut off, follow the instructions "To Turn OffGas To Heater" and call service technician or yourgas supplier.4. Return pilot adjustment screw counterclockwisesame number of turns as in step 2.5. Replace pilot adjustment cover screw, then followthe lighting instructions to get heater ready foroperation.CAUTION: Should overheating occur or the gassupply fails to shut off, DO NOT turn off or discon-nect the electrical supply to the pump. Instead, shutoff the gas supply at a location external to the heater.Failure to observe this precaution may aggravate theoverheated condition resulting in possible damage tothe heater and injury to the user.NOTE: There is no pilot adjustment cover onRobertshaw 7200 gas valve.321SETPILOTONOFFPILOTADJPILOT KEYPilot AdjustmentFig. 15: Robertshaw 7200 Gas Valve (Models 0135 &0195)For Automatic Ignition Systems1. Turn on power to the ignition systems and turn gassupply off at the gas valve.2. Check ignition module as follows:a. Set the tankstat to high setting.b. Watch for continuous spark at the pilot burner.c. Time the spark operation. Time must be with-in the lockout timing period (15 or 90seconds).d. Turn tankstat down to end call for heat andwait 60 seconds on lockout models beforebeginning step 3.3. Turn on gas supply.4. Set tankstat to high setting.5. Systems should start as follows:a. Spark will turn on and pilot gas valve will openat once. Pilot burner should ignite after gasreaches the pilot burner.b. Spark ignition should cut off when pilot flameis established.c. Main gas valve should open and main burnershould ignite after gas reaches the burnerport.Flame FailureWith burner operating, close the manual fuel valves tosimulate a flame failure. System should lock out aftersafety switch timing (15 seconds). After the safetyswitch has cooled, open the manual valves (relightstanding pilots) and reset the safety switch; the burnershould restart.Inspection ProceduresBurnersClean main burners and air louvers of dust, lint anddebris. Keep heater area clear and free from com-bustibles and flammable liquids. Do not obstruct theflow of combustion and ventilating air. Make visualcheck of burner and pilot flame. Yellow flame indicatesclogging of air openings. Lifting or blowing flame indi-cates excess high gas pressure. Low flame indicateslow gas pressure.