POWER
PAK
Owner’s Manual
12
Issue Date February 2004
Filling the Drain Back Tank
1. Remove both the
Fill and Level Plugs
(located under the cover for temperature sensor connections at the
side of the unit) and insert the two
Charging Adaptors
.
2. Secure a piece of clear hose to each of the adaptors and secure using hose clamps.
3. Place the loose end of the level hose into a bucket or similar to collect overflow from the charging process.
4. Syphon potable water through the fill hose into the system until water flows from the level fitting hose.
(Approx 55 litres for 10 kW POWER
PAK
)
5. Remove both hoses from the connection ports.
Emptying the Drain Back Tank
(Service Procedure only)
1. Turn OFF electrical and water supplies to the module and allow 5 minutes for the closed circuit fluid to return
to the drain back tank.
2. Remove the
Fill Plug
to release any pressure in the system then replace plug into socket
.
3. Secure a piece of clear hose to the drain fitting located adjacent the Collector Circulation pump and place into
a container of sufficient volume to hold the collector circuit fluid.
4.
Remove the Fill Plug which will allowing the fluid to flow from the Drain Back Tank into the container.
Pressure Testing the System
1. Remove the PR6 valve from the expansion control fitting at the lower right corner of the collector array and
insert in its place the plug removed from the level fitting on the POWER
PAK
module.
2. Re-insert the fill plug removed during the filling process to the module.
3. Insert the test block assembly into the level port at the
module.
4. Attach the air pump to the connection valve and pump
the system pressure up to 120 kPa on the gauge.
5. Disconnect the air pump and check the valve for
leakage then note the pressure gauge reading.
6. Allow the system to stand under pressure for at least 10
minutes then re-check the gauge to confirm that no
pressure change has occurred.
7. If the pressure is constant, go to step 9.
8. If a leak has been detected, then locate and repair it
before operating the system. The simplest method to detect a leak in the closed circuit is to spray a soap-
and-water solution on each joint and connection in the pipe work. Bubbles will indicate a pressure leak.
Repair the leak and return to step 4 for a system re-test.
9. Release the air pressure from the system by depressing the centre pin of the air pump connection in the test
block.
10. Once all the air pressure has been released, remove the test block from the level port.
11. At the collector array, remove the plug from the expansion control fitting and re-fit the PR6 valve in its place.
12. Syphon Hartgard into the system as described in the paragraph “Filling The Drain Back Tank”.(2 x 4.5 litre for
10 kW POWER
PAK
). During this operation water will flow from the level port into the catchment bucket.
13. Remove the hose connections and re-fit the plugs to the fill and level ports.
Fill Plug
Level Plug
Air Pump
Connection
Pressure Gauge
Charging Adaptor.
Do not turn ON the electrical or water supplies until the drain back tank has been
refilled.
CAUTION: When testing please ensure the collectors remain covered with their
cardboard protectors until the testing is completed.
Insert into Level
Port
Fill & Level
Plug Fitting
TEST BLOCK
