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5
3
2 (Drain Valve)
6
7
Fig. 1
Key - Item Identification
Fig. 1a
1
Safety Group incorporating Pressure Relief
2
Drain with Isolation Connection Point
3
Non Return Valve Screw
5
Right Hand Isolation Valve with Integral Thermometer
6
Flow Meter Adjustment Screw (shown in open position)
7
Flow Meter
4
1 (Fill Valve)
Outlet Lever to restrict
& close flow
Open position
6
On
Off
7
2.0 Flushing & Filling the System
2.1
Filling the East/West pump station
When using the Multifit Electric Filling Pump (Part No 5130234)
or the Multifit Manual Filling Pump (Part No 5122761).
1. Ensure the pump is primed with Solar fluid prior to
commencing filling procedure.
2. Connect the filling pump as shown to the connection on the
safety group of the East / West pump station (Fig. 1 item1).
Electric Filling Pump - Place the suction tube into the transfer
fluid container with the hose approximately 50mm from the
bottom of the container, connect the drain hose to the drain
valve connection on the flow meter (Fig. 1 item 2). Place the
drain tube into the transfer fluid container. Check at this stage
that both valves are closed, the valves are closed when the
isolation levers are in the horizontal plane.
NOTE: Isolate the main pump station when filling the East/West.
3.Turn the combined isolation valve to 45° (Fig. 2 item 4).
4.Turn the flow meter adjusting screw off (Fig. 1a item 6). 'Off ' is
when the screw is in the 9 O'clock position.
5. The lever on the pump outlet should be turned to the closed
position (Electric Filling Pump).
6. Switch on the pump (Electric Filling Pump) and pressurise the
pump prior to opening the fill valve. Open fully the east west
pump station fill valve (Fig. 1 item1), and open the drain valve
(Fig. 1 item 2).
7. Electric Filling Pump - Turn the pump outlet lever slowly and
only open the pump outlet sufficiently to ensure the system can
be filled, and that over pressurisation of the circuit does not
occur.
Approx
50mm
8.The transfer fluid level should be monitored during the fill
procedure. If the fluid level gets near to the bottom of the
suction hose, approximately 1 litre is left in the container, it will be
necessary to stop the fill procedure, close valves 1 and 2 (Fig. 1),
switch off the pump and replenish the transfer fluid before
repeating from step 1 again. (If the level gets below this, the
pump is liable to damage and air will be introduced into the
system.)
9. During the flushing process air bubbles may be seen behind the
glass window of the flow meter, the air should gradually reduce
until there is a clear flow of fluid.The flushing process should be
run for several minutes to ensure the system is flushed of debris
and all air is removed.The debris will be caught within the inline
filter of the drain tube on the multifit electric pump. Debris
accumulation can be cleaned out from the filter when required.
10. Once the east west leg of the system is filled and a pressure
of 2 bar achieved, (Electrical Filling Pump - Close the valves
(Fig. 1 items 1 & 2).Turn the combined isolation valve (Fig. 2 item
4) back from 45°. Switch off the pump, disconnect the pump
hoses carefully releasing the pressure, and screw on the brass
sealing caps securely. Check for leaks.
11.Turn the flow meter adjusting screw back to 12 O'clock to
open, (Fig. 1a item 6). For flow rate adjustment see section 3.0.
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