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6. The front access panel should be removed and all
components visually inspected at least twice a year. Check
for evidence of chafing or heat damage to any wiring or
components. Check also for any signs of water leakage at
any of the plumbing connections. If there are signs of any
damage or leakage contact the Hatco Corporation or your
authorized service agent.
7. The relief valve should be manually operated at least once
a year to ensure proper operation.
WARNING
Before performing any maintenance/service, care should
be taken that any of the discharged water does not come
into contact with the operator or surrounding surfaces.
Water can be extremely hot and can cause severe scalding
and damage to the property.
If relief valve discharges periodically, do not plug valve.
If replacing valve does not stop discharge, contact an
Authorized Hatco Service Agent or the Hatco Service
Department.
8. Visually observe and inspect the Blended Phosphate Water
Treatment System weekly: To ensure proper operation
replace depleted cartridges immediately.
Burner Removal/Inspection
NOTICE
Burner inspection and/or removal must be performed by
an authorized service agency.
1. Shut-off the electrical power and gas supply to the heater.
2. Disconnect the internal flexible gas supply line connector
at the gas regulator valve.
3. Disconnect the ignition module spark cable.
4. Remove two nuts holding the burner tray to the base.
5. Remove four screws from the front cover of the combustion
chamber and remove the cover.
3/8"–1/2"
(10–13 mm)
Pilot Flame
6. Lift and slide burner assembly out.
7. Disconnect spark electrode wire from pilot igniter.
8. Perform intended service.
9. Reverse above procedure to re-install, checking burner
assembly and seal to prevent gas leakage.
PMG100200M-0222
Draining The Heat Exchanger
1. Shut-off the electrical power, gas and water supply to the
heater.
2. Allow unit to cool down to room temperature.
3. Open the drain valve under the Booster Water Heater to
remove water from the tank and pump assembly.
4. Remove the drain plug located on the front of the heat
exchanger and allow the water to drain from the heat
exchanger into a pan or pail. Approximately 16 oz. (498 g)
of water will drain from the unit.
5. Reverse above procedure using a food grade thread
sealant to seal the plug threads and prevent leakage.
Failure to drain the heat exchanger prior to exposing it to
freezing conditions will damage the heat exchanger and
void the warranty.
NOTE: Freeze damage to the heat exchanger and unit can be
avoided by doing the following:
• After draining heat exchanger, blow 30 psi of air into
the heat exchanger drain opening which will purge
the exchanger of any residual water.
• Leaving drain valves open until performing startup
procedures.
• Stop migrating cold air from entering the unit from the
vent.
Component Adjustments/Replacements
ALWAYS turn OFF power at fused disconnect switch/circuit
breaker, shut off gas supply, and allow unit to cool before
performing any cleaning, adjustments, or maintenance.
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and dangerous
operation. Verify proper operation after servicing.
Gas Valve Replacement
1. Shut
off
electrical power
the heater.
2. Remove front panel.
3. Remove flexible gas piping to gas valve inlet.
4. Disconnect wiring connections to gas valve.
5. Remove burner tray assembly as outlined above.
6. Remove valve from manifold pipe.
7. Reverse above procedure to re-install, checking burner
and seals to prevent gas leakage.
Ignition Module Replacement
1. Shut off electrical power to the booster.
2. Disconnect spark plug igniter wire.
3. Remove mounting screws holding module.
4. Remove module.
5. Reverse above procedure to re-install.
21
MAINTENANCE
CAUTION
WARNING
and
gas supply to
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