emmeti EH0618DC, Инструкция по установке и эксплуатации

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5. INSTALLATION
Water charge and air purge in the hydraulic circuit
Before continuing with water filling, check the following:
• The water pre-charge pressure is 1.5 bar.
• Air bleed openings must be provided at all high points of the system. The
air purge openings must be positioned in places where they are easily
accessible, to carry out commissioning. An automatic air purge is sup-
plied inside the unit. Check that the air purge valve is not over-tightened,
so that air bleeding in the water circuit remains possible.
Then:
1) Connect the water supply to a drain and fill valve.
2) Loosen the bleed valve cap to let the air out of the hydraulic circuit.
The cap must not be removed.
Air Purge Valve
Plug
Losen
Tighten
3) Fill the hydraulic circuit with water until the pressure gauge indicates
a pressure of about 1.5 bar.
4) Activate the circulator (Pump 1) to let the air out of the hydraulic circuit
as follows:
- Make an electrical bridge between terminal L and K,
- Electrically power the heat pump. At this point the circulator will be
in operation and it will be possible to check the correct circulation of
water in the system and through the heat pump.
Once this check has been completed, remove the power supply from
the heat pump and remove the bridge between terminal L and K.
5) When all the air has been removed, tighten the drain valve cap again
Note:
• During the air bleeding operation additional water filling may be re-
quired.
• The water pressure indicated on the pressure gauge varies according
to the water temperature.
• The unit may dispose of some excess water through the safety valve
Pump 1
L
K