Heat Exchanger Removal; Combustion Chamber; Internal Heat Exchanger Inspection And Cleaning - Hayward H150 Installation, Operation And Service Manual

SECTION 6. QUALIFIED TECHNICIAN - MAINTENANCE/SERVICING

Heat exchanger removal:

1. Shut off water, gas and electricity to the heater. See figure 8.
Drain heat exchanger.
2. Lift up and remove heater integral vent.
3. Remove screws from left and right side access panels and
remove the panels.
4. Remove screws from rear heat shield and remove heat shield.
5. Remove screws from top rain guard and remove rain guard.
6. Disconnect wires from limit switches on front header.
7. Remove the pressure switch tube and pull through oval slot in
the intermediate panel.
8. Millivolt Heaters Only - Remove the thermostat bulb from the
front header and reroute to opposite side of heater.
!
NOTE: Using needle nose pliers to pull out copper strip
makes bulb removal easier.
9. Electronic Heaters Only - Remove thermistor from front
header.
10. Remove the four screws from the flue collector and remove
flue collector from heater.
11. Loosen union nuts and detach pool plumbing from front
header.
12. Lift heat exchanger off heater and desoot or replace as
necessary.
13. Reverse the above procedure for reassembly.

Combustion chamber:

!
IMPORTANT: Inspect the FireTile™ refractory for dam-
age with the heat exchanger removed. Replace refractory as
needed. Pull out the refractory boards individually, front and
back first, then sides. Reverse procedure for reassembly.
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