page no. 36 of 48
L
NVx Range Users, Installation & Servicing Instructions Doc Ref M104 issue 1.0 Sep 2018.
Only parts supplied via or authorised by Powrmatic
should be used. A short list of parts and part numbers are
detailed in section 3.2 of this manual. If in doubt, please
contact Powrmatic.
1. Ensure that the gas service valve is turned OFF. If
a flexible gas connection has been used go to step 2
otherwise unscrew the union nut situated immediately
downstream of the gas service valve.
2. Remove the electrical plug connections from the top of
the multifunctional control.
3. Release the flanged connections at the inlet and
outlet of the multifunctional control and remove the
multifunctional control.
4. Reconnect the new valve in the reverse order to that
above ensuring that the valve is correctly orientated.
Renew the sealing 'O' rings if necessary.
1. Remove the burner assembly as described in Section
2.7.2.
2. Remove the end plates of the burner assembly and the
central burner support plate.
3. Exchange burners as required and reassemble
components in reverse order.
4. Re-commission the appliance as described in Section
2.6.
1. Disconnect the electrode leads from the control box as
appropriate.
2. Remove the screw securing the electrode assembly
to the burner assembly side plate and withdraw the
assembly.
3. Fit replacement and reassemble in reverse order.
Check that the spark gap is 2.5mm (See section 2.7.3) and
the rectification electrode is 10 - 12mm forward of the
burner.
NB. Ensure that the thermostats are set correctly before
fitment
Limit Thermostat settings:-
LNVx (all)
= 90°C
1. Remove the screws securing the thermostat phial
mounting plate to the inner bulkhead*, withdraw
assembly and unclip the phial.
2. Remove the electrical connections from the limit
thermostat.
3. Remove the securing nut and remove thermostat from
the front panel.
4. Fit replacement thermostat in reverse order.
Note*: LNVx35 & 90 - 140 units have a second
limit stat at the opposing end of the heater to
the burner/controls. Remove the two small
cover plates and replace as above.
1. Remove the four screws securing the flue outlet socket.
2. Disconnect the fan electrical connections from the main
terminal strip
3. Remove the screws securing the fan mounting box to
the exhaust header plate.
4. Remove fan assembly.
5. If needed, transfer the fan mounting box to the
replacement fan.
6. Fit replacement exhaust fan, using new gaskets and
silicon sealant as necessary, and reassemble in reverse
order.