To Remove The Thermocouple - Valor 492CNA Installer's & Owner's Manual

To remove the control & pipework
manifold, swing the rear of the unit
away from the firebox until the control
valve bracket is clear of the cutout in the
back panel side flange then pull the unit
up and sideways.
Refit in the reverse order. When
relocating the unit, make sure that the
thermocouple probe does not get
damaged by contact with the firebox
side.
TO REMOVE THE THERMOCOUPLE
Though not essential, disconnection of
the thermocouple will be facilitated if the
control and pipework manifold is
removed
-
see section
19.9.
Undo the thermocouple from the
interruptor block at the bottom of the
control valve (note that the vent sensor
wires will then be loose).
Undo the nut securing the thermocouple
probe to the mainfold panel
and
withdraw
the thermocouple.
Refit in the reverse order. When
reconnecting the thermocouple nut to
the control valve, make sure that the
vent sensor wires are properly located.
Initially screw the thermocouple nut
until finger tight, then, finally tighten a
further quarter turn with a wrench.
When relocating themanifold unit, make
sure that the thermocouple probe does
not get damaged by contact with the
firebox side.
TO REMOVE FRONT OR REAR
BURNER INJECTOR
Remove the control & pipework
manifold
-
see section
19.9.
Loosen the pipe running to the relevant
injector at the valve end.
Disconnect the relevant pipe from the
injector carrier and swing clear.
Dismantle the relevant injector from the
carrier inside the bulkhead panel.
Refit in the reverse order. When reloca-
ting the manifold unit, make sure that the
thermocouple probe does not get
damaged by contact with the firebox
side. Seal with pipe sealant.