Ignitor:
To remove ignitor.
1. Turn pump, gas supply and heater power off.
2. Unplug ignitor connector from control module.
3. Remove two screws that retain ignitor.
4 Remove ignitor from combustion chamber.
Reverse the above procedures for installation.
Main burner orifices:
The main burner orifices can be removed from the
manifold with a
7
⁄1
6
” wrench without having to remove
the burner assembly from the heater. After cleaning or
replacing orifices re-install in manifold being careful
not to overtighten as a leak may result.
CAUTION: Do not enlarge orifice holes.
Gas conversion:
The factory installed gas train, where appropriate,
may be changed from natural gas to propane or from
propane to natural gas, using appropriate conversion
kit, available from the factory. Gas conversions are to
be performed only by a qualified service agency.
Detailed instructions are included with each kit.
NOTE: Conversion kits are not available in
Canada. Conversions must be done by the conver-
sion station at Hayward Pool Products Canada, Inc.
Control Locations:
The following sections give a brief overview of the
various heater controls and service/replacement pro-
cedures. The text describes the intended purpose of
the controls. See Figure 50 for general location of the
controls.
Electrical Wiring:
NOTE: If it is necessary to replace any of the origi-
nal wiring, it must be replaced with No. 18 AWG UL
or CSA approved wire rated at 105°C and 600 V.
Control Module:
The control module is a Silicon Nitride hot surface
ignition control with an integral thermostat.
To remove control module:
1. Disconnect all wires from control module.
2. Detach from sheetmetal panel.
Reverse the above procedures for installation.
Display Interface Assembly:
The display interface assembly provides a user
interface in the heater. The replacement part is avail-
able only as a complete assembly.
To remove display interface assembly:
1. Unplug display interface assembly connector from
control module.
2. Remove four screws that retain the plastic bezel
to the sheetmetal.
3. Pull entire assembly through the front panel.
Reverse the above procedures for installation.
Fuse Board:
The fuse board provides terminals for field supply
wiring and contains fuses for over-currrent protection
of the heater
’s components.
To remove fuse board:
1. Disconnect all wires from fuse board.
2. Detach from sheetmetal panel.
Reverse the above procedures for installation.
Vent Pressure switch:
The vent pressure switch will not allow the heater
to continue to operate if the vent becomes blocked.
To replace switch:
1.
T
urn pump, main gas valve and heater power off.
2. Open control panel door.
3. Remove wires, screws and tubing from the switch.
4. Replace with new switch and reverse the above
procedures.
31
Burner inspection and cleaning:
W
ith the heater on, remove the front door and
m
ake a visual inspection of the main burners through
the inspection window. The main burner flames
should be about
1
⁄2 to 2 inches in height and should
not “lift” off the ports of the burners. See Figure 47.
A normal flame is blue, without yellow tips. Yellow
tips or a totally yellow or “lazy” flame may be an indi-
cation of a fuel-rich mixture due to restricted air
openings, including spider nests in the burner and/or
orifices.
All burners should be brushed with a wire brush
and be free of lint, dust and spider webs before each
season of use. Burners with damaged ports must be
replaced.
Burner removal:
(See Figure 48)
1. Turn pump, gas supply and heater power off.
2. Turn gas valve knob to “OFF”.
3. Remove wires and gas line from the heater gas
valve.
4. Remove valve mounting bracket.
5. Remove burner manifold. Remove orifice plate.
6. Remove the two screws securing each burner to
the intermediate panel.
7. Pull burners out of heater.
Burner Installation:
(See Figure 48)
1.
Reverse the above procedures for installation.
2. Turn on gas. Use a soapy water solution to check
for leaks.
3. Bubbles forming indicate a leak. Never use an
open flame (match, lighter, torch, etc.) as a leak
could cause explosion or injury.
4. To start heater, follow the lighting instructions on
the label inside the cabinet.
Gas valve replacement:
(See Figure 48)
WARNING: Do not attempt to repair gas valve. If
found defective, replace entire valve. Attempts to
repair it will void warranty.
1. Turn pump, gas supply and heater power off.
2. Disconnect wires to gas valve.
3. Remove gas valve/manifold assembly.
4. Unscrew gas valve from manifold pipe.
5. Replace gas valve. Only use liquid pipe dope on
the male threads of the manifold. Do not place
pipe dope on the first two threads of the pipe.
6. Reinstall gas valve/manifold assembly.
7. Reconnect wires to gas valve.
30
Main Burner Flame Characteristics
Figure 47
Burner Removal
Figure 48
Ignitor Removal
Figure 49
