Powrmatic Air Heater NV50-D

Remove the burner assembly as described in Section 7.2

Remove the following components

Reassemble components in reverse order

Re-commission the appliance as described in Section 6

Remove the screws securing components

Disconnect the fan electrical connections from the terminals on the PCB

Remove fan assembly by pulling forwards and to the left to disengage the retaining lugs

Transfer the fan mounting box to the replacement fan if needed

Fit replacement exhaust fan using new gaskets and silicone sealant as necessary

Reassemble components in reverse order

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

Is a 3-phase motor being replaced?

Is the direction of rotation correct?

Remove the burner assembly as described in Section 7.2

Multifunctional Control Removal

Release the flanged connections at the inlet of the multifunctional control

Release the flanged connections at the outlet of the multifunctional control

Remove the multifunctional control

Reconnect the new valve ensuring correct orientation

Renew the sealing O-rings if necessary

Inspect fan blades for damage and excessive deposits

Slacken the cable gland on the heater casing

Disconnect fan leads from electrical terminals on the PCB

Withdraw cable through entry grommet

Remove fan and motor assembly by removing four hexagon headed bolts

Reassemble fan and motor assembly in reverse order

7.5.2 Centrifugal Fan/Silencer Section

Inspect fan blades for damage and excessive deposits