Flushing with water and cleaning
1. Connect a water hose from the property’s cold water
supply to the filler connection (XL27). Open the
connection’s valve.
2. Connect a flexible drain hose to the filler connection
(XL28). Open the connection’s valve.
NOTE
The drain hose must be long enough to
reach a drain or a bucket.
3. Close the shut-off valve (QM34), in the right-hand
position.
NOTE
The pressure in the water supply must not
exceed 2.9 bar (higher pressure entails a
risk that the safety valves will trigger).
4. Slowly open the water supply until water runs out
into the drain/drain hose. In this step, ensure that
there are no leaks in the system. If leaks are dis-
covered, these must be repaired. Then follow the
above points again until all leaks have been elimin-
ated.
5. Increase the liquid flow to approx. 10 l/min, or until
there is a sufficient flow to flush the system. Approx.
20 litres of water are sufficient. Shut off the water
supply
6. Vent valve (QM23) (there are 3 of this type of valve
in various parts of the pipe system) should remove
the rest of the air from the system.
7. Air in the unit’s heat exchanger (EP10) is removed
using vent valve (QM21). Use a T20 screwdriver and
align it with the grooves on the valve. Slowly screw
anti-clockwise; the air will gradually be removed
from the heat exchanger. Once venting is complete,
the T20 screw must be screwed back in to its original
position.
NOTE
Perform this step at the same time as
flushing the system.
Vent valve (QM21), heat exchanger
UN
QM21
EP16
8. Pressurise the system when the air has been com-
pletely removed from the pipe system.
Pressure and leakage tests
Pressure-test brine side
NOTE
Check that the filler connection (XL28) is fully
closed before you start the pressure tests.
1. Connect a water hose from the property’s cold water
supply to the filler connection (XL27).
2. Open the filler connection’s valve.
3. Start filling with water.
4. Wait until the pressure in the pipe system rises to
2.9 bar.
5. Immediately close the filler connection (XL27) once
the pressure has reached 2.9 bar, and also shut off
the water supply.
6. Disconnect the hose from the filler connection
(XL27).
NOTE
Handle this step carefully to avoid flooding.
7. Check carefully for any leakage. If leaks are dis-
covered, these must be repaired.
8. Leave the system pressurised for at least 6 hours.
Write a suitable report for the test results.
9. Once the pressure test has been completed, connect
the drain hoses to the drain valves (QM2.1) and
(QM2.2).
10. Open the drain valves and wait until all the water
has run out.
11. Then close both of the drain valves.
Pressure-test heating medium side
1. Connect a drain hose to connection (EP14-XL2).
2. Connect a water hose from the property’s cold water
supply to connection (EP14-XL1).
31
Chapter 6 |
Commissioning and adjusting
GreenMaster-HP
