Heat Exchanger Inspection And Cleaning; Combustion Chamber; Heat Exchanger Removal; Burner Inspection And Cleaning - Hayward H200FD Service & Installation Manual

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EXTERNAL HEAT EXCHANGER INSPECTION AND CLEANING:
Remove the louvered exhaust cover panel (see Figure 12) and inspect the external surfaces of the heat exchang-
er for soot accumulation. If soot has accumulated, it must be removed by following the recommended procedure:
1. Turn pump, main gas valve, and heater power "OFF".
2. Remove heat exchanger according to the procedure in Section II, under "Reversible Water Connections".
3. Using a soft-tipped brush such as a paint brush, apply a degreaser to the entire heat ex-
changer surface (top and bottom). Allow the heat exchanger to sit for a period of time to
allow the degreaser to loosen the soot. Wash the heat exchanger using a garden hose ensuring
both the top and bottom surfaces are cleaned. Re-assemble the heater by reversing the disassembly steps.
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:
• Insufficient air supply
• Inadequate venting
• High or low gas pressure
• Blockage of burner tubes or orifices
• Blockage of blower inlet
• Low voltage supply causing blower to "spin" slower
• Improper heater location installation
• Incorrect gas supply pipe size
• Excessive water flow 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.

HEAT EXCHANGER REMOVAL:

Follow steps in Section II, under "Reversible Water Connections" for heat exchanger removal procedure.

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 (see
Figure 25.) The main burner flames should be
about ½" to 2" in height and should not "lift"
off the burner ports (see Figure 29).
A normal flame is blue, without yellow
tips. yellow tips or a totally yellow or "lazy"
flame may be an indication of a fuel-rich mix-
ture due to restricted air supply. Spider nests in
the burner and/or gas orifices may also cause
yellow tips.
WARNING: BURN HAZARD Do not use a wire brush to remove soot from the
heat exchanger. This could cause a spark and ignite the gases trapped within the soot.
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
Figure 29: Burner Flame characteristics
Pomona, CA Clemmons, NC Nashville, TN
Tel: 908-351-5400 www.haywardpool.com