Supplied By www.heating spares.co Tel. 0161 620 6677
28
Tempra 12 / 18
Gas valve
(fig. 23)
• Isolate gas and electricity supplies
• Remove outer case (two screws bottom rear corners)
• Remove the two securing screws and lower control panel
• Disconnect electrical connections from valve ("A")
• Disconnect plastic tube "C"
• Loosen the connection "D" on gas pipe and the gas inlet
connection of the boiler "E"
• Remove the two fixing screw "E" below gas valve
• Slide out gas valve
• Remove four fixing screw "F" on top of the valve and disconnect
the gas pipe
• Remove bottom connection from gas valve.
• Fit top + bottom gas connections to the new gas valve and
replace in reverse order
• Check operation and gas pressures
Central Heating Temperature Sensor
(fig. 25)
• Isolate electricity and water supplies
• Remove outer case (two screws bottom rear corners)
• Remove the two securing screws and lower control panel
• Identify the sensor from figure 24
• Disconnect electrical connection to the sensor
• Drain the affected service either D.H.W. or C.H.
• Unscrew the sensor, do not leak water onto P.C.B.
• Replace in reverse order
Safety Valve
(fig. 25)
• Isolate electricity and water supplies
• Remove outer case (two screws bottom rear corners)
• Remove the two securing screws and lower control panel
• Identify valve from fig. 25
• Drain the boiler
• Release the outlet union to the valve and undo the valve
union connection
• Remove the valve outlet fitting
• Replace in reverse order
• Refill to 1 - 1.5 bar and TEST
Air pressure switch
(fig. 24)
• Isolate electricity
• Remove outer case (two screws bottom rear corners)
• Open room sealed compartment
• Remove the two screw "A" fixing air pressure switch
• Disconnect electrical leads "B"
• Remove pressure sensing tubes (white=D; Red=C)
• Note relevant positions of all connections and replace in reverse order.
• Re-instate power and test - P/D 1.15 mb
Fig. 24
Fig. 23
Fig. 25
A
B
C
D
D
C
A
F
E
C.H. sensor
Safety valve
