OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
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All field piping must be provided by a licensed refrigeration technician and must comply with
the relevant local and national codes.
① For refrigerant piping of outdoor unit, refer to the installation manual supplied with the
outdoor unit.
② The maximum allowed piping length depends on the connected outdoor model.
4.3 EXV Installation
4.3.1 Mechanical Installation
(1) Remove the EXV box cover by unscrewing screws.
(2) Drill 4 holes on correct position (measurements as indicated in figure below) and fix the
valve kit box securely with 4 screws through the provided holes Ø12 mm.
Notes:
① Make sure that the EXV box is installed upwards.
② Make sure there is enough free space in front and in the side of the box for future
maintenance.
4.3.2 Brazing Work
(1) Prepare the inlet/outlet field piping just in front of the connection (do not braze yet).
Fig.4.3.2
A Inlet coming from the outdoor unit
B Outlet to air handling unit
C Wire clamp
(2) Remove the wire clamp (C) by unscrewing 6xM4.2.
(3) Braze the field piping.
Notes:
① Make sure to cool the filters and valve body with a wet cloth and make sure the body
temperature does not exceed 120°C during brazing.
② Make sure that the other parts such as electrical box, tie wraps and wires are
protected from direct brazing flames during brazing.
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