Hayward H150FDN All models English - Page 30

SECTION 6. QUALIFIED TECHNICIAN - MAINTENANCE/SERVICING Burner inspection and cleaning: With the heater on, remove the front door and make a visual inspection of the pilot and main burners. A mirror, placed on the heater bottom below the burners, may be necessary to view the main burner flames. The main burner flames should be about 8-10 inches in height and should not "lift" off the ports of the burners. See Figure 45. The flames should have well-defined mantles with the bottom 2-3 inches blue changing over to yellow upwards. A totally yellow or "lazy" flame may be an indication of a fuel-rich mixture due to restricted air openings, including spider nests in the burners and/or orifices. Burner assembly installation: (see Figure 47) 1. G uide burner assembly through intermediate panel. Lift up, and place burner mounting bracket on the three retaining hooks on the intermediate panel. 2. S ecure the burner mounting bracket to the intermediate panel with three bolts. 3. R econnect wires to the gas valve and ignition module (electronic ignition only) according to the wiring diagram. 4. R econnect gas line to gas valve. Turn on gas and check for gas leaks. Use a soapy water solution. Bubbles forming indicate a leak. Never use an open flame (match, lighter, torch, etc.) as a leak could cause explosion or injury. 5. T o start heater, follow the lighting instructions on the label inside the cabinet. 8"-10" HEIGHT Figure 45: Main Burner Flame Characteristics 3/8" -1/2" Gas valve replacement: (see Figure 47) ! WARNING: Do not attempt to repair gas valve. If found to be defective replace entire valve. Attempts to repair it will void the warranty. 1. F ollow "Burner Assembly Removal" procedure. 2. D isconnect wires to gas valve including pilot generator wires (millivolt only). 3. D isconnect pilot tubing from gas valve (millivolt only). 4. U nscrew gas valve from manifold pipe. 5. R eplace gas valve. Only use liquid pipe dope on the male threads of the manifold. Do not place pipe dope on the first two threads of the pipe. 6. R econnect wires to gas valve, including pilot generator wires and pilot tubing (millivolt only). 7. F ollow "Burner Assembly Installation Procedure". Figure 46: Pilot Flame Characteristics All burners should be brushed with a wire brush and be free of lint, dust and spider webs before each season of use. Burners with damaged ports must be replaced. See Figure 46 for pilot flame characteristics (millivolt heater only). 1. Shut off water, gas and electricity to the pool heater. 2. Turn gas valve knob to "OFF" and set system switch to "OFF". 3. R emove wires and gas line from the heater gas valve. Remove the electrode/sensor wire (electronic ignition only) from the ignition module. 4. R emove the three bolts securing the burner mounting bracket to the intermediate panel. 5. L ift burner assembly up and out of the three retaining hooks on the intermediate panel and pull assembly out of heater. Pilot assembly removal: (see Figure 48) (Millivolt Heater Only) 1. D isconnect pilot generator wires and pilot tubing from gas heater gas valve. 2. D isconnect electrode ignitor wire from Clicklite™. 3. R emove screw securing pilot bracket to burner mounting bracket. Lower pilot bracket to clear locating stud and remove assembly from heater. 4. T o service or replace pilot, remove two screws securing pilot to pilot bracket and disconnect pilot tubing from pilot. ! CAUTION: Never enlarge the opening in the pilot orifice. 5. R everse the above procedures for installation. Be sure there are no gas leaks at pilot tubing connections. 28