Transformer; Blower; Bypass Service Cartridge - Hayward H135ID Service & Installation Manual

1. Turn pump, gas supply, and heater power OFF.
2. Remove top jacket and heat exchanger cover.
3. Remove the wires from the pressure switch.
4. Remove switch from header.
5. Replace the pressure switch. Use new sealant on the pressure switch threads before re-installing.
6. Reverse steps above to complete the procedure.

TRANSFORMER:

The transformer converts the fi eld supply voltage to a 24 VAC output for powering the ignition control
board, control circuits, and gas valve.
To replace the transformer:
1. Turn pump, gas supply, and heater power OFF.
2. Remove the front access panel.
3. Disconnect all wires from the transformer leads.
4. Remove the (2) screws that secure the transformer to the control box.
5. Replace the transformer. Reassembly is the reversal of steps above.

BLOWER:

The blower provides the air that mixes with the gas at the main
burners for the combustion process. The blower operates during
the pre-purge time (approximately 30 seconds) at the beginning of
each ignition cycle, during the entire time the gas valve is open and
the burners are fi ring, and for 30 seconds after the valve gas
See Figure 15 and Figure 20.
To replace the blower:
1. Turn pump, gas supply, and heater power OFF.
2. Remove the front access panel.
3. Disconnect the blower from the ignition control board.
4. Disconnect the tubing from the hose barb on the blower
housing.
5. Remove the blower from the air box cover (4 screws).
6. Remove the blower air inlet plate from the blower (5 screws).
7. Reverse the above steps to reassemble the blower. Be sure
the blower outlet gasket is in place before proceeding.

BYPASS SERVICE CARTRIDGE:

The following procedure details how to remove and replace the internal pressure bypass valve in the
header.
1. Turn pump, main gas valve, and heater power OFF.
2. Drain heat exchanger according to instructions in Section III of this manual.
3. Remove the cartridge retaining nut from end of header (see Figure 18).
4. Slide out the bypass cartridge from the end of the header (see Figure 18).
5. Check the function of the bypass valve to ensure the valve fl aps rotate smoothly on the shaft, and the
spring fully closes the valve.
6. Apply silicone o-ring grease (Hayward Jack's 327 Multilube p/n SP032712, or equivalent) on o-ring
seals on the bypass cartridge before inserting into the header.
7. Insert bypass cartridge into header with the arrow on the end of the cartridge pointing up.
8. Re-install cartridge retaining nut. Nut should be tightened hand-tight only. DO NOT OVER-TIGHTEN.
See Figure 15 for its location.
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
Figure 20:
Blower
closes.
Air Box Cover
Pomona, CA Clemmons, NC Nashville, TN
Tel: 908-355-7995
Blower
Blower Air Inlet
Blower
www.hayward-pool.com
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