30
INSTALLATION
isar - Installation and Servicing
36
FILLING
Central Heating
1. Remove the sealing panel. Refer to Frames 49 & 50.
2. Swing the control box down into the servicing position.
Refer to Frame 51.
3. Ensure that the CH isolating valves are open.
4. Fill and vent the system. Check for water soundness.
Note. The domestic hot water flow rate is
automatically regulated to a maximum:
HE24 = 9.6 l/m (2.1 gpm)
HE30 = 12.0 l/m (2.6 gpm)
HE35 = 14.4 l/m (3.2 gpm)
IMPORTANT - when filling:
a. Remove the diverter valve actuator (refer to Frame 67) and
depress the spindle several times during filling. Replace
diverter valve actuator.
b. When filling, there may be a slight water leak from the air
vent therefore electrical connections should be protected.
c. Bleed any air from the pump and ensure that it is free to
rotate.
For Wilo Pump:
To ensure the pump is free to rotate:
i. Remove the vent plug
ii. Using a screwdriver, rotate the shaft several times
For CP Pump:
To ensure the pump is free to rotate:
i. Unscrew the central cap.
ii. Gently pull the cap out to engage with the shaft.
iii. Rotate the cap and spindle.
Note. Some slight water leakage will occur.
Domestic Hot Water
1. Fully open all DHW taps and ensure that water flows freely
from them.
2. Close all taps.
To vent the pump:
Repeat steps i. and ii. Move the fitting from side to side to
allow air to vent. Ensure the cap is fully retightened.
iii. Replace the vent plug.
Note. Some slight water leakage will occur.
Pump
Automatic
air vent
Central
Cap
nm8412
c.
INSTALLATION
203319-3.pmd 27/03/2008, 08:1530
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