Hayward Universal H-Series Low NOx Service/Installation: H150FDN H200FDN H25 - Page 42

Burner Inspection And Cleaning, Burner Removal

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42 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 31.) The main burner flames should be about ½" to 2" in height and should not "lift" off the burner ports (see Figure 39). 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 mixture due to restricted air supply. Spider nests in the burner and/or gas orifices may also cause yellow tips. Figure 39: Burner Flame characteristics Burner removal: Refer to Figures 31 and 37 as needed. 1. Turn pump, gas supply, and heater power "OFF". 2. Turn gas valve knob "OFF". 3. Remove the front access panel. It is secured with (4) screws. 4. Disconnect the union joint in the gas supply piping outside the heater cabinet. 5. Disconnect the wiring terminals from the gas valve. 6. Disconnect the wiring terminals from the blower. 7. Remove the gas manifold assembly. It is attached to the air box using (4) screws. 8. Remove the screws from the igniter access panel and pull it out of the way. Do not disconnect the wires. 9. Remove the air box cover. Do not remove the blower from the air box cover. 10. Remove the (2) screws securing each burner to the combustion chamber front. 11. Pull the burners straight out of the heater. USE ONLY HAYWARD GENUINE REPLACEMENT PARTS Pomona, CA Clemmons, NC Nashville, TN Tel: 908-351-5400 www.haywardpool.com

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Pomona, CA Clemmons, NC Nashville, TN
Tel: 908-351-5400
www.haywardpool.com
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
42
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 31.) The main burner flames should be about ½” to 2” in height and should
not “lift” off the burner ports (see Figure 39).
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 mixture due to restricted air supply. Spider nests in the burner and/or gas orifices may
also cause yellow tips.
BURNER REMOVAL:
Refer to Figures 31 and 37 as needed.
1. Turn pump, gas supply, and heater power “OFF”.
2. Turn gas valve knob “OFF”.
3. Remove the front access panel. It is secured
with (4) screws.
4. Disconnect the union joint in the gas supply piping outside the heater cabinet.
5. Disconnect the wiring terminals from the gas valve.
6. Disconnect the wiring terminals from the blower.
7. Remove the gas manifold assembly. It is attached
to the air box using (4) screws.
8. Remove the screws from the igniter access panel and pull it out of the way.
Do not disconnect the wires.
9. Remove the air box cover. Do not remove the blower from the air box cover.
10. Remove the (2) screws securing each burner to the combustion chamber front.
11. Pull the burners straight out of the heater.
Figure 39: Burner Flame characteristics