York YCSA 120 T, Technical Information

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Location
Before locating the unit in place, check the specifications
described on same to be sure you have received the ad-
equate product.
The unit should be placed on a perfectly horizontal plane,
making sure the base can support the weight of the unit.
If you want to insure the absence of vibration, the unit can be
placed on a cork or similar antivibratory base, or fastened to
its base with antivibratory plates or supports.
Fastening the unit
Before installing the unit, make sure the structure can with-
stand the weight of same.
If the unit is placed on the floor, a concrete base should be
prepared so as to distribute its weight evenly.
Clearances
The installation of each unit should have clearances for:
a) Air intake and discharge.
b) Maintenance servicing.
c) Power supply connection.
For correct operation, always respect the minimum distances
indicated in the general dimensions diagrams with regard to
possible obstructions of free air circulation or maintenance
servicing.
Wiring
Electrical connections
The established national regulations should be followed
in all cases.
Each unit is supplied with a control box to which the power
supply will be connected through a fused main switch or an
automatic switch.
Scroll compressors, rotational direction
The Scroll compressors operate correctly in one single rota-
tional direction only. Although these units are protected by a
phase sequence detector, when starting the equipment make
sure this rotational direction is correct.
If it is not correct:
- The compressor does not compress.
- It makes an unusual noise.
- Amperage consumption is lower.
- It overheats.
Hydraulic connections
The hydraulic connections of the water intake and outlet of
the chiller should be carried out respecting the intake and
outlet directions indicated.
Galvanised iron or copper tubing can be use, with dimensions
no lower than those indicated, and keeping in mind the pres-
sure drops at said connections and at the indoor exchanger
of the installation.
The pump should be sized in accordance with a nominal flow
that allows an
D
t within the operating limits.
In all cases, a flow switch should be installed so as to avoid
the possibility of operation without water circulation.
An expansion vessel should be installed in the water return
tubing.
This vessel must be adequate for the total water volume of
the installation.
During the winter season, with outdoor temperatures below
0°C, precautions should be taken to avoid water from freezing
in the tubing networks.
Usual application is to fill the circuit with an antifreeze mixture
(glycol).
Loose cables can produce overheating of the terminals or an incor-
rect operation of the unit. A fire hazard may also exist. Therefore,
make sure all cables are connected tightly.
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