Ferroli TEMPRA 30 Installation, Service And User Instructions Manual page 36

7.11 Spark or fl ame detect electrode (fi g. 35)
• Isolate gas and electricity supply
• Remove outer case (two screws bottom rear
corners)
• Open room sealed compartment and
combustion chamber
• Identify electrode from fi g. 32
• Unplug electrical connection "A" from sensing
electrode
• Remove fi xing screw and remove fl ame detect
electrode
• Remove the two fi xing screw from spark
electrode plate and remove it.
7.12 Pump (fi g. 36)
Replacement of pump head
• Isolate electricity and fl ow and return pipes
• Remove casing (two screws bottom rear corners).
• Remove the two securing screws and lower control
panel
• Release pressure from boiler via pressure relief valve
• Unplug the pump lead "A" from the pump head
• Place a piece of cloth or other absorbent material over
the rear of the control panel to catch any drops of water
that may fall when the pump head is removed.
• Using a 4mm allen wrench undo the four allen screws
"B" in the pump head, lift away pump head from the
pump body
• fi t new head into pump body and secure with the allen
screws tightening evenly.
• Replace electrical connection.
Replacement of pump body (fi g. 36)
• Proceed as for removal of pump head
• Disconnect the expansion vessel connecting pipe "E"
from the rear of the pump body by removing the clip
from the left hand side
• Disconnect the boiler return pipe
• Disconnect the pump to heat exchanger connection by removing the clip "F"
• Unscrew the nut on bottom of pump
• Turn the pump body through 90°, pull the bottom forward and withdraw the pump body
• Reassemble in reverse order taking care to ensure the O-rings are in place and undamaged.
7.13 Removal of heat exchanger
• Isolate gas, water and electricity supplies
• Remove casing (2 screws bottom corners)
• Remove the two securing screws and lower control panel
• Drain heat exchanger for both CH + DHW
• Remove sealed compartment front panel
• Disconnect the overheat thermostat and central heating limit thermostat
• Remove the main burner, fan, fl ue hood and fl ow meter as described previously
• Remove the pump to heat exchanger fl ow connection and locknut
• Undo the domestic water outlet connection and locknut
• Lift out heat exchanger
• Re-assemble in reverse order
36
TEMPRA 30
Flame
detect A
F
A
B
Spark
Fig. 35
E
Fig. 36