Haier CA0035EAND, Service Manual

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14
6. Installation
6.1 Symbol Precautions
Symbol description
Dear user,
For the better understanding of this Manual and the proper operation of the chiller, the marks and symbols used in
this Manual are described as follows:
It is likely to cause death, serious injury and other severe accidents if the user fails
to do as required.
It is possible for severe accident to occur.
WARNING
CAUTION
WARNING
CAUTION
■ Installation and maintenance must be carried out by professionals experienced in this type of unit in accordance
with applicable local codes and rules on installation and maintenance. We are not liable for any unit damage or
casualty due to non-conformance with this requirement.
■ The power supply must be switched off prior to maintenance and relocation of the unit; otherwise, personal
injury or death may be caused by electric shock. Do not touch such hot components as compressor and exhaust
pipe directly.
■ When the water system contains water, control the startup and shutdown of the water pump via the water pump
output point on the unit controller; otherwise, the anti-freezing protection of the unit will not work, causing the
freezing crack to the heat exchanger. If the unit is to idle for a long time in winter, drain the water from the water
system via the drain valve to prevent the freezing crack of the heat exchanger, the water pipe and other parts on
water side. Furthermore, the water pump shall be power off to avoid starting up against frost without water.
■ To prevent the heat exchanger on water side from being frozen due to foreign matters entered, a self-contained
water filter must be installed on the water return pipe of the unit (specific installation position is shown in water
system diagram).
■ Dregs and dirt in the water pipe network including filter and heat exchanger may seriously damage the heat
exchanger and water pipe. Installers and users must ensure the quality of chilled water, not use anti-icing
mixtures containing salt and prevent the entry of air into the water system, because the salt and air can oxidize
and corrode steel parts inside the heat exchanger.
■ No unit is allowed to be installed near such places that are dirty, oily, salty, exposed to a large amount of sulfur
gas and where the unit parts may be subjected to corrosion, such as toilet vent, operation room vent and
sewage treatment equipment.
■ If the unit is operated below 0°C, it must be installed at a place at least 300 mm above the ground, so as to
avoid
icing of unit base plate and to ensure the normal operation of the unit even though the snow reaches this height;
in addition, the unit shall be placed on a plane (with maximum deviation per meter of not more than 2 mm).