Combustion Chamber; Burner Inspection And Cleaning; Burner Removal And Replacement - Hayward H135ID Service & Installation Manual

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surfaces are cleaned. Re-assemble the heater by reversing the disassembly steps. Use care when
setting the heat exchanger in place so as not to damage the white sealing gaskets or combustion
chamber.
Although the heat exchanger should be cleaned of soot and reinstalled, the fact that sooting occurred
should be investigated, as it may indicate other problems such as:
• Insuffi cient air supply
• High or low gas pressure
• Blockage of burner tubes or orifi ces
• Blockage of blower inlet
• Low voltage supply causing blower to "spin" slower
• Improper heater location installation
• Incorrect gas supply pipe size
• Excessive water fl ow through heat exchanger
• LP tank below 30% full

COMBUSTION CHAMBER:

The combustion chamber is a single-piece casting. If damaged, the entire chamber must be replaced.

BURNER INSPECTION AND CLEANING:

With the heater ON, remove the front access panel and make a visual inspection of the main burners
through the sight glass
should not "lift" off the burner ports (see Figure 1919).
A normal fl ame is blue, without yellow tips.
indication of a fuel-rich mixture due to restricted air supply. Spider nests in the burner and/or gas orifi ces may
also cause yellow tips.

BURNER REMOVAL AND REPLACEMENT:

Refer to Figure 02, Figure 1515, and Figure 1616 as
1. Turn pump, gas supply, and heater power OFF.
2. Turn gas valve knob OFF.
3. Remove the front access panel.
4. Disconnect the union joint in the gas supply piping outside the heater cabinet.
5. Disconnect the wires from the two terminals on the gas valve.
(see Figure 1515.) The main burner fl ames should be about ½" to 2" in height and
Figure 19: Burner Flame characteristics
Yellow tips or a totally yellow or "lazy" fl ame may be an
needed.
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
Pomona, CA Clemmons, NC Nashville, TN
Tel: 908-355-7995 www.hayward-pool.com