Section 5 - Owner Serviceable Items; Circulation Pump; Solenoid; Temperature Controller - Central Boiler CLASSIC Owner's Manual

SECTION 5 - OWNER SERVICEABLE ITEMS

NOTE: If any of these items are under warranty,
remember that the warranty covers only the cost
of the replacement part. Labor is not covered.

CIRCULATION PUMP

Taco ® circulation pumps can be easily replaced or
repaired. The pumps have a replaceable cartridge that can
be installed easily.
1. Shut off (or disconnect) the electrical supply to pump.
2. Shut off valves on both sides of pump.
3. Remove the four screws securing the motor and
impeller assembly to the cast body of the pump; then
remove the motor from the pump.
4. Pull the replaceable cartridge from the assembly and
install new cartridge.
5. Place motor assembly into position on the cast body
taking care to properly position the gasket. Secure with
four new screws. Tighten securely.
6. Open both valves and check for leaks; then turn on
electrical supply.
NOTE: Instructions are provided with replacement
cartridge. Be sure to follow manufacturer's
recommendations if they differ from these
instructions.

SOLENOID

Prior to replacing the solenoid, check the following items.
1. Check to be sure there is incoming power to the furnace.
2. Check inside the control panel to see if the fuse has
blown. If the fuse is blown, check the draft opening
to be sure the linkage operates freely and that there
are no obstructions to the door; then replace the fuse
3. If solenoid still does not operate, turn the Power
Disconnect Switch to the off position.
WARNING
Do not attempt service on the solenoid without first
disconnecting electrical power to the solenoid.
4. Remove the screws securing the draft enclosure cover;
then remove the cover.
CAUTION
Solenoid may be hot.
5. Carefully disconnect the two wire leads connected to
the left side of the solenoid by gently pulling and
moving them from side to side.
6. Remove top cotter key of the linkage.
7. While supporting the solenoid with your hand, remove
the top two solenoid mounting screws and loosen the
bottom two.
8. Lift up on the solenoid until it clears the screw heads
and remove.
32
9. Place the new solenoid into position and lightly secure
with the screws. Adjust the solenoid up or down until
the solenoid plunger free length is between 15/16 and
1 in.; then tighten the screws securely. Connect the
solenoid to the linkage with the cotter pin. Slightly
spread the legs of the cotter pin.
10. Carefully attach wire leads onto the solenoid terminals
(white wire connected to the upper terminal).
11. Install the cover and secure with the screws.
12. Turn the Power Disconnect Switch to the ON position.
NOTE: If the solenoid rattles during operation, the
alignment between the solenoid and the lift tab is
incorrect. To align the solenoid and lift tab, loosen
the four solenoid mounting screws and move the
solenoid until the solenoid plunger aligns with the
lift tab. Secure the solenoid; then make sure it
operates smoothly.

TEMPERATURE CONTROLLER

1. Remove all wood and live coals from the firebox.
CAUTION
Remove all wood and live coals from the furnace.
Do not perform this procedure with any live coals
in the furnace.
2. Disconnect the electrical power at the main power
source to the wood furnace; then open the control
panel door. Remove the screws securing the inner
door panel; then remove the panel.
WARNING
Do not attempt service inside the electrical control
panel without first disconnecting the electrical
power at the main power source.
3. Carefully label each of the wires connected to the
temperature controller according to the numbered
connections identified on the top of the controller.
4. Using a small screwdriver, loosen the screws securing
each of the wires; then pull the wires out of the
controller.
Fig. 40
Section 5 - Owner Serviceable Items