Pipes To Be Made On Site; Assembly Procedure - Airwell DK 125 Manuel D'installation Et De Maintenance

PIPES TO BE MADE ON SITE

pipe links installation, system tightness testing and filling and draining the refrigerant charge must be performed
by a qualified air conditioning engineer in compliance with industry rules and best practices (brazing, vacuum
draining, filling, etc...).
Only use new, clean and dry refrigeration quality copper pipe of an appropriated diameter.
When installing the gas and liquid pipe links between the outdoor unit and the indoor unit, care must be taken to
avoid contact with any hot surfaces such as hot water pipes, boilers, chimneys etc...
Refrigerant fluid conduits must be as short and as straight as possible to ensure operation at maximum efficiency.
The bending radius of the pipes should be equal to or more than 3,5 times de outside diameter
of the pipe.
Do not bend the pipes consecutively more than three times and do not make more than 12
bends over the complete length of the link..

ASSEMBLY PROCEDURE

In certain outdoor units, the pipe links are attached at the level of the brazing connection points in order to avoid
damage during transport. If this is the case, the attachments should be removed when making the pipe connections
between the indoor and outdoor units.
For certain machines, the liquid inspection glass is supplied separate to the unit. In this case, the liquid inspection
glass must be located just before the indoor unit as shown on the following diagram:
The liquid inspection glass is an important item and its proper location is vital. The information provided is
indispensable when filling the system with refrigerant fluid and also for ensuring that the humidity level in the circuit
is below the critical level that could lead to damage to certain refrigeration components. Therefore, the liquid seen
through the inspection glass must always remain green (humidity level below 60 ppm).
INLET LINK
HUmIDITY INDICATOR
LIqUID WARNING /
To obtain the right tightening, cover the surface with cooling oil.
The use of a counter wrench is required to tighten the valves.
The values of the tightening torque are shown in the table below.
pIpE Ø
1/4""
3/8""
1/2""
5/8""
7/8""
INDOOR UNIT
TIGHTENING TORqUE
15-20 Nm
30-35 Nm
50-54 Nm
70-75 Nm
90-95 Nm
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