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Installation
4.3 Installation of expansion valve
Installation of expansion valve – ECOi and ECO G systems
NOTICE
Damage to the expansion valve wires
Exposing the wires of the expansion valve to the outside and/or to direct sunlight might damage
the wires and should therefore be avoided.
► Attach the AHU Kit either directly to the Air Handling Unit or to a wall nearby and
make sure that it is not exposed to direct sunlight.
► Use protecting wire ducts to avoid exposing the wires of thermistors and the
electronic expansion valve to the outside.
When installing the expansion valve, the following limitations and restrictions need to be
observed:
● Wires must not be put out of equipments.
● Wires must not be cut and connector of wires must not be detached.
● The distance from AHU heat exchanger must not exceed 6 m.
● Pipe reducers must be installed in the field where applicable.
For example, for 10HP ECOi systems, piping size to outdoor unit is Ø 9.52 mm
(instead of Ø 15.88 mm*).
AHU heat exchanger
Expansion valve (accessory)
Pipe to the outdoor unit
Pipe to the outdoor unit
Max. length: 6 m
Flare connection:
Ø 15.88 mm
*
Pipe to the AHU heat exchanger
● Vertical inclination of expansion valve must be less than
±
15°.
Pipe to the outdoor unit
Expansion valve (MOV)
Pipe to the AHU heat exchanger
!
