IVT Greenline HT Plus C Assembly, Commissioning And Maintenance Manual page 58

Connecting the heat pump to the heating system
7. When the fl uid level has dropped to 25 per cent in the barrel
the fi lling pump is stopped and the barrel is fi lled with more HTF.
8. When the system is full and air no longer comes from the return pipe
run the system for at least a further 60 minutes. You can also start
the heat transfer fl uid pump to speed up the air venting. Enter manual
operation under menu 5.3 and start the pump G3 (P3). See Commis-
sioning the heat pump/Testing the heat pump manually.
9. The coil must be pressurized when venting is complete. Turn the
valves to the pressure increase position on the fi lling unit and pres-
surize the coil to 1–1.5 bar. A plastic expansion vessel is connected to
the heat pump heat transfer fl uid circuit. The level in the tank must not
drop below the minimum level 1/3. Ensure that the expansion vessel
is fi lled to the correct level, use the fi lling/venting valve for this, see
Expansion vessel in the user section.
10. Set the fi lling unit to the normal position and switch off the fi lling
pump. Disconnect hoses and insulate the fi lling unit with insulation
(insulation included in HT Plus 6-11kW).
*Filling unit in pressure increase position
**Filling unit in pressure increase position
*Filling unit in normal position
**Filling unit in normal position
58
Commiss./Service
Manual operation of
all functions 5.3
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