Supplied By www.heating spares.co Tel. 0161 620 6677
48
220692C
48
SECTION
Replacement of Parts
12
Air Pressure Switch
Note: Alternative types of Air
Pressure Switches may be fitted.
Gain access as Section 10 steps 1 to 4.
Remove the air pressure tubes and
electrical connections, release the
screws and nuts, remove the switch.
When fitting the replacement make
sure that all the plastic tubes and
electrical connections are made as
shown.
Gas Valve
Gain access as Section 10, steps 1 to 4.
Disconnect all electrical leads from the
gas valve.
Disconnect the pilot pipe at the pilot
burner.
Undo the four screws at the outlet
manifold and disconnect the gas
service cock union.
Transfer the half union of the gas
service cock to the inlet of the
replacement gas valve. Also transfer
the pilot supply pipe. Use a little
thread sealant on the external threads to
ensure gas soundness.
Fit the new valve, take care not to
damage the “O” ring.
It will be necessary to purge the
pipework and valve before relighting,
check gas pressure settings, refer to
Section 7.
SECURING
SCREW (2)
CLEAR AIR
PRESSURE TUBE
RED
YELLOW
GAS SERVICE
COCK UNION
SECURING
SCREW (4)
BROWN
"O" RING
G/Y
BLACK
BLUE
WIRING
DIAGRAM
BECK
YAMATAKE
3057
RED AIR
PRESSURE TUBE
YELLOW
BLACK
SECURING
SCREW (2)
RED AIR
PRESSURE
TUBE
BLACK
RED
CLEAR AIR
PRESSURE
TUBE
PILOT
BURNER
ELECTRICAL
LEADS
PILOT
PIPE
EARTH
CONNECTOR
