Hatco pmg-60m-0705(7) User Manual

Form No. PMG-60M-0705

MAINTENANCE

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 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 1 cup 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.

CAUTION

Failure to drain the heat exchanger prior to
exposing it to freezing conditions will damage

the heat exchanger and void the warranty.

COMPONENT -
ADJUSTMENTS/REPLACEMENTS

WARNING/CAUTION

Always disconnect the power and shut off gas
supply prior to performing any maintenance
on the booster heater to avoid possible
personal injury or damage to the booster

heater.

WARNING

Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify

proper operation after servicing.

1. Gas Valve Replacement

a. Shut off electrical power and gas supply to

the heater.

b. Remove front panel.
c. Remove gas piping to gas valve inlet.
d. Remove burner assembly as outlined in

Burner Removal/Inspection.

e. Disconnect wiring connections to gas valve.

f. Remove valve.
g. Reverse above procedure to re-install.

2. Ignition Module Replacement

a. Shut off electrical power to the booster.
b. Remove screws for electrical box cover and

slide out front.

c. Disconnect spark cable from module.
d. Remove mounting screws holding module.
e. Remove module.
f. Reverse above procedure to re-install.

3. Transformer Replacement

a. Shut off electrical power to the heater.
b. Disconnect wire leads from transformer at the

power supply.

c. Remove mounting screws that hold

transformer in place.

d. Remove transformer from unit.
e. Reverse above procedure to re-install.

4. Temperature Control Probe Replacement.

a. Shut off electrical power to the heater.
b. Shut off water supply to the heater and open

drain valve to remove water below the
temperature control probe level.

c. Remove the front panel cover.
d. Remove two (2) screws from electrical box

cover and remove out the front.

e. Disconnect temperature control probe wire

leads from thermostat body.

f. Remove temperature control probe from tank.
g. Reverse above procedure to re-install.

5. Recirculating Pump Replacement

a. Shut off gas supply.
b. Shut off electrical supply.
c. Shut off water supply and allow unit to cool

sufficiently.

d. Open the drain valve under the booster

heater to remove water from the tank and
pump assembly.

e. Remove front cover and left side panel for

access to pump.

f. Remove two (2) screws from the electrical

box cover and lift off.

ATTENTION

Au moment de l’entretien des commandes,
étiquetez tous les fils avant de les débrancher.
Des erreurs de câblage peuvent entrâiner un
fonctionnement inadéquat et dangereux.

S’assurer que l’appareil fonctionne

adéquatement une fois l’entretien terminé.

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 start-

up procedures.