21
Connecting the heat pump to the heating system
Example:
200 metres of hose with anti-freeze gives 200 x 0.29
litres anti-freeze/ metre = 58 litres of anti-freeze and
200 x 0.71 litres of water/ metre = 142 litres of water.
40/35 indicates 40mm outside diameter PEM pipe
with 35mm inside diameter.
2. Fill the fi lling pump with heat transfer fl uid. If mixing the solution on
site, pour water fi rst into the fi lling pump, then anti-freeze liquid. See
table 1 and 2 for correct mixture.
Hose type: 40/35
Anti-freeze type
Water (l)
Anti-freeze (l)
Bioethanol
0,71
0,29
Propylene/ethylene glycol
0,65
0,35
Table 1: Mixing ratio in litres/metre
Anti-freeze type
Water
Anti-freeze
Bioethanol
75%
25%
Propylene/ethylene glycol
65%
35%
Table 2: Mixing ratio in percentage by weight
3. Set the valves on the fi lling link in fi lling mode.
4. Set the valves on the fi lling pump in mixing mode.
5. Start the fi lling pump to start mixing heat transfer fl uid in the barrel.
Mix for two minutes.
Repeat points 6 to 9 for each circuit where applicable. The other circuits
must be closed.
6. Set the valves on the fi lling pump in fi lling mode to start fi lling the
collector system.
Filling link in fi lling mode
Filling pump in mixing mode
Filling pump in fi lling mode
Note
The fi rst litres of fl uid from the
return pipe are often contaminated.
Therefore collect these litres in a
separate tank.
If using a premixed solution of glycol
and water (e.g. Tyfocor L) the solution
must be diluted to suit the require-
ments above
Note
