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Sales/Spares & Replacement Help Line 01604 762881
d. Using either CH+ (K1) or CH - (K2) buttons select either 0 or 1.
‘
0
’ is for the fixed speed standard efficiency pump.
‘
1’
is for the PWM High Efficiency pump.
e. Press and release RESET (K4) button to return the display to P 27.
f. Exit installer mode by pressing and releasing RESET again for ‘t 5’ to flash followed by
pressing and releasing ‘ ‘ (K5).
NOTE:
When replacing the pump head with the new PWM High Efficiency Pump Head refer to the
instructions with the kit for commissioning.
18.19
CH WATER PRESSURE SENSOR
18.19.1 Refer to paragraph 17.5
18.19.2 Drain the boiler.
See
paragraph 18.11.
18.19.3 Using a suitable tool pull out the retaining clip.
18.19.4 Pull the pressure sensor upwards to remove.
18.19.5 Unplug the electrical connection and transfer to the new pressure sensor.
18.19.6 Push the new pressure sensor onto the rear pump housing and fit retaining clip.
18.19.7 Refit in reverse order.
18.19.8 Refill the boiler.
See
paragraph 12.4.
18.19.9 Check operation of the boiler. See Section 15.
18.20
DHW FILTER & FLOW REGULATOR
18.20.1 Refer to paragraph 17.5
18.20.2 Remove the flow turbine. See paragraph 18.10.
18.20.3 Remove the clip securing the pipe to housing.
18.20.4 Withdraw the filter and flow regulator.
18.20.5 Replace and refit in reverse order.
18.20.6 Refill the boiler.
See
paragraph 12.4.
18.20.7 Check operation of the boiler. See Section 15.
18.21 EXPANSION
VESSEL
RECHARGING
18.21.1 Refer to paragraph 17.5
18.21.2 Relieve system pressure through a CH drain point.
18.21.3 Remove the charge point cover.
18.21.4 Recharge the tank pressure to 0.75 - 1 bar.
18.21.5 Refit in reverse order
18.21.6 Check operation of the boiler. See Section 15.
REPLACEMENT
18.21.7 Refer to paragraph 17.5
18.21.8 Drain the boiler CH circuit.
See
paragraph 18.11.
18.21.9 Remove the clip from the base of the silver hose.
18.21.10 Remove the top bracket by removing the single screw, remove the bracket.
18.21.11 Slide the expansion vessel forward with the hose attached.
NOTE:
It is advised you take the expansion vessel outside when removing the
hose. Cover the hose connection at the vessel with a cloth when removing
the hose. Remember this is a pressurised container and will contain
pressurised water.
18.21.12 Replace and refit in reverse order.
18.21.13 Refill the boiler.
See
paragraph 14.5.
18.21.14 Check operation of the boiler. See Section 5.
18.22 FLUE
SENSOR
18.22.1 To remove the rotate the sensor so the pins
are vertical. Pull out and replace with new.
18.22.2 Rotate the sensor to lock into position.
FIGURE 50.
CH WATER PRESSURE SENSOR
FIGURE 49.
READ OUTS
FIGURE 51. EXPANSION VESSEL
FIGURE 52.
SENSOR TEMPERATURE/RESISTANCE DIAGRAM
FIGURE 50
CLIP
