Powrmatic Heater LX20

Disconnect the electrical connections to the centrifugal fan section

Remove the side panels of the section for access to the fan and motor

Fit replacements as appropriate and reassemble in reverse order

If a 3-phase motor is being replaced, ensure that the direction of rotation is correct

Interchange any two of the three phases connected to the motor if the direction of rotation is incorrect

Check that all the parts are in place

Test the operation of the fan/motor after replacement

Describe any issues encountered during the replacement process

Ensure thermostats are set correctly before fitment

Remove the screws securing the thermostat phial mounting plate to the inner bulkhead and withdraw assembly

Remove the electrical connections from the limit thermostat

Remove the securing nut and remove thermostat from the front panel

Fit replacement thermostat in reverse order

Remove the two screws securing the cover

Disconnect electrical connections

Pull off the sensing tube from the air pressure switch

Remove the screws fixing the air pressure switch

Remove the four screws securing the flue outlet socket

Disconnect the fan electrical connections from the main terminal strip

Remove the screws securing the fan mounting box to the exhaust header plate

Clean impeller by brushing with a stiff brush

Re-assemble using a new sealing gasket to the fan mounting box

Use silicon sealant around the joints

Check that the primary sections of the burner tubes are clean and free from debris.

Remove the exhaust collector box to expose the rear sections of the burner tubes.

Carefully remove the swirlers and check for any deterioration.

Check the integrity of the burner tubes and ensure they are clean.

Brush inside each tube until all foreign material has been removed.

External Inspection and Verification

Visually inspect the integrity of the burner tubes externally.