Daikin EWAD TZ, Installation, Operation And Maintenance Manual

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D-EIMAC00907-16EN - 10/20
The minimum distances, reported above, ensure functionality
of the chiller in most applications. However, there are specific
situations which include multiple chiller installations: in this
case the following recommendations are to be followed:
Multiple chiller installed side by side in a free field with
dominant wind.
Considering an installation in areas with a dominant wind from
a specific direction (as shown in the Fig.5):

Chiller N°1: is performing normally without any
ambient over-temperature

Chiller N° 2: is working in a warmed ambient. The
first circuit (from the left) is working with air
recirculating from Chiller 1 and the second circuit to
the recirculating air from the chiller N°1 and
recirculation from itself.

Chiller N° 3: circuit on the left is working in a over-
temperature ambient due to the recirculating air from
the other two chillers, circuit on the right is working
quite normally.
In order to avoid the hot air recirculation due to dominant
winds, the installation where all chillers are aligned to the
dominant wind is preferred (see figure below):
Multiple chiller installed side by side in a compound.
In case of compounds with walls of the same height of the
chillers or higher, the installation is not recommended. Chiller 2
and chiller 3 work with sensible higher temperature due to the
enhanced recirculation. In this case special precautions must
be taken in to account according to the specific installation (eg:
louvered walls, install the unit on base frame in order to
increase the height, ducts on the discharge of the fans, high lift
fans, etc).
All the above cases are even more sensitive in case of design
conditions close to the limits of the unit operating envelope.
NOTE: Daikin cannot be considered responsible in case of
malfunctions generated by hot air recirculation or insufficient
airflow as result of improper installation if the above
recommendations are ignored.
Figure 5
– Multiple Chiller Installation