ARENA 30 C
34
Replacement of pump head
(fig. 27)
• Isolate electricity and flow and return pipes
• Remove casing
• Release pressure from boiler via pressure relief valve
• Unplug the pump lead “B” 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 4 mm allen wrench undo the two allen screws “C” in the
pump head, lift away pump head from the pump body
• Fit new head into pump body and secure with the allen screws
tightening evenly.
• Replace electrical connection.
Replacement of pump body
(fig. 27)
• Proceed as for removal of pump head
• Disconnect the two nuts “D“ fixing the pump body
• Remove pump
• Reassemble in reverse order taking care to ensure the O-rings
are in place and undamaged.
Expansion Vessel
(fig. 27)
Isolate electricity and water supplies
Remove outer case
Loosen the “E” connections to expansion vessel
Remove the expansion vessel
Re-assemble in reverse order
Re-pressure expansion vessel
(charge pressure 0,8-1 bar) through the air charging valve
Ensure pressure relief value is open
(twist about 1/2 of a turn) when repressurizing
D.H.W. temperature sensor
(fig. 27)
• Isolate electricity
• Remove outer case
• Pull out sensor “F” from tube, with its spring
• Remove electrical connections from sensor
• Remove spring from sensor
• Replace in reverse order
C.H. temperature sensor, overheat cut off
thermostat and Aquafast Sensor
• Isolate electricity
• Remove outer case
• Identify the location of thermostat from fig.
28.
• Pull out thermostat or sensor from tube, with
its spring
• Remove electrical connections from sensor or
thermostat
• Remove spring from sensor or thermostat
Replace in reverse order
Fig. 27
A
F
C
D
D
E
A
B
C.H.
sensor
Fig. 28
Overheat
thermostat
Aquafast
sensor
Summary of Contents for ARENA 30 C
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