Installation Guide

Pomona, CA Clemmons, NC Nashville, TN
Tel: [phone] www.haywardpool.com
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
47
TRANSFORMER:
The transformer converts the eld supply voltage (either 240 VAC or 120 VAC) to a 120 VAC output for
blower and igniter power, and a 24 VAC output for powering the ignition control board, control circuits, and
gas valve. See Figure 25 for its location. To replace the transformer:
1. Turn pump, gas supply, and heater power “OFF”.
2. Remove the front access panel. It is secured with (4) screws.
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 ring, and for 30 seconds after the valve gas
closes. See Figures 25 and 30.
To replace the blower:
1. Turn pump, gas supply, and heater power “OFF”.
2. Remove the front access panel (4 screws).
3. Disconnect the blower wire harness from the ignition
control board.
4. Disconnect the tubing from the hose barb on the blower
housing.
5. Remove the blower air inlet plate from the blower (4 screws).
6. Remove the blower from the air box cover (4 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. This procedure applies only to plastic (non-ASME) headers. On bronze (ASME) headers, the bypass
service cartridge is not eld-replacable. Please contact Hayward technical support for more information.
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 6 screws and remove the upper plastic heater side panel, to allow access to the header.
4. Remove the cartridge retaining nut from end of header (see Figure 28).
5. Slide out the bypass cartridge from the end of the header (see Figure 28).
6. Check the function of the bypass valve to ensure the valve aps rotate smoothly on the shaft, and the
spring fully closes the valve.
7. 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.
8. Insert bypass cartridge into header with the arrow on the end of the cartridge pointing up.
9. Re-install cartridge retaining nut. Nut should be tightened hand-tight only. DO NOT OVER-TIGHTEN.
10. Re-install the upper plastic heater side panel.
Figure 30: Blower
Blower Air Inlet Plate
Blower
Air Box Cover
Blower Outlet Gasket
Figure 30: Blower