Installing Brine Pipes; Filling The Brine System - Danfoss DHP-AL Installation And Service Instructions Manual

7.2

Installing brine pipes

1. Determine which side of the heat pump brine pipes are to be
connected.
2. Route the return pipe through the return pipe rubber bellows
on the side of the heat pump.
3. Install the return pipe with all the accompanying components.
Remember to install the filler cock with the filter cover turned
upwards.
4. Route the supply pipe out through the supply pipe rubber
bellows on the side of the heat pump.
5. Install the supply pipe with all the accompanying components.
6. Install the expansion/bleed tank with accompanying safety
valve.
⚠
Bear in mind that the outdoor unit may move during
defrosts, use flexible hoses to connect the pipes from the
heat pump and pipes on the outdoor unit.
7. Install the supply and return pipes to the outdoor section.
8. Fit both brine pipes with anti-diffusion insulation running all
the way from the heat pump to the lead-in in the wall. The
brine pipes running outside the house to the collector can be
buried, however they must be well insulated.
7.3

Filling the brine system

⚠
NOTE! Before filling the brine system, the electrical installa-
tion must be completed so that it is possible to operate the
brine pump.
⚠
NOTE! Always check local rules and regulations before using
anti-freeze.
⚠
NOTE! Use anti-freeze with corrosion protection additives,
mixed to achieve frost protection down to -32°C.
Calculated volume
The volume of the brine system is calculated as follows:
• Heat pump (exchanger, pipe and outer jacket) approximately
47 litres
• Expansion tank approximately 3 litres
• Outdoor unit approximately 7 litres
• Collector (single pipe): 28 mm pipe approx. 0.5 litre/m
Filler cock
When the filler cock is installed on the return pipe, remember to
turn the strainer cover upwards in order to minimise the amount of
air that gets into the brine system when cleaning the filter.
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Figure 35: Filler cock.
Position Name
1 Cover, strainer
3 Shut-off valve
4 Shut-off valve
5 Shut-off valve
6 Strainer
7 Shut-off valve
1
4 6 7
5
Figure 36: Filling the brine system
Position Name
1 Return pipe, brine
2 Supply pipe, brine
3 Shut-off valve (part of the filler cock)
4 Shut-off valve (part of the filler cock)
5 Shut-off valve (part of the filler cock)
6 Strainer (part of the filler cock)
7 Shut-off valve (part of the filler cock)
8 Safety valve (1.5 bar)
9 Bleed and expansion tank
10 Shut-off valve
11 External pump
12 External container
1. Set the heat pump operating mode to "OFF" in the control com-
puter menu INFORMATION -> OPERAT.
2. Mix water and anti-freeze in the correct proportions in an exter-
nal container (12). Note that each pack must be well mixed.
3. Check that the freezing point of the mixture (-32°C) is reached
using a refractometer.
4. Fill the system with the mixture using an external pump (11)
which can bleed the brine pipes. Connect the pressure side of
the pump to the filler connection at valve (5).
5. Close valve (4).
6. Open valves (5) and (10).
7. Connect a transparent hose (3) that opens out into the external
container (12).
8. Open valve (3).
9. Start the external pump (11) and fill the brine pipes.
10. Start the brine pump manually in the control computer menu
SERVICE -> MANUAL TEST -> BRINEPUMP, set the value to 1.
11. Run the brine pump and the external pump (11) in series until
fluid, clear of air, comes out of the return hose from the valve
(3).
12. Stop the brine pump in the control computer menu SERVICE
-> MANUAL TEST -> BRINEPUMP, set the value to 0, at the same
time leave the external pump (11) running.
13. Open valve (4) with the external pump running to eliminate the
air between the valves (3) and (5).
14. Close valve (3) and pressurise the system using the external
pump. NOTE! Max. 150kPa, (1.5bar).
15. Close valve (5).
16. Stop the external pump (11) and disconnect the filling equip-
ment.
17. Install insulation on the filler cock.
VMBME102
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