Midea LSBLG255/MZ, Техническое и сервисное руководство

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MCAC-CTSM-2014-03 DX type water-cooled screw chiller (PCB Control)
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interlocked with the input contact in the control cabinet. Its installation requirements are as
follows:
(1) The flow switch shall be installed on the pipe vertically.
(2) The straight pipe section at each side of the flow switch shall have a length that is at least 5
times the pipe diameter; do not install it near the elbow, orifice plate or valve.
(3) The direction of the arrow on the flow switch must be consistent with the direction of water
flow.
(4) In order to prevent vibration of the flow switch, remove all air in the water system.
(5) Adjust the flow switch to keep it in open state when the flow is lower than the minimum flow
(the minimum flow is 70% of the design flow). When the water flow is satisfied, the flow
switch shall keep in closed state.
5) The water filter must be installed before the water inlet pipeline of the unit, which shall be
provided with a 25-mesh screen. This will aid in preventing foreign material from entering and
decreasing the performance of the evaporator.
6) A strainer should be placed for enough upstream to prevent cavitation at the pump inlet (consult
pump manufacturer for recommendations). The use of a strainer will prolong pump life and help
maintain high system performance levels
7) The flushing and insulation of the water pipelines shall be carried out before it is connected with
the unit, so as to prevent dirt from damaging the unit.
8) The design water pressure of the water chamber is 1.0Mpa. Use of the water chamber shall be
not exceeding this pressure in order to avoid damaging the evaporator.
9) Do not load the weight of water pipe onto the unit. When water inlet/outlet are connected with
corresponding water pipe, soft connection such as rubber joint should be used to avoid the
transmission and inter-disturbance of vibration and noise to avoid the vibration which may be
transmitted to indoor side.
10) In close loop water system, to diminish the impact on water pipe because of the expansion or
contraction of water volume and to avoid the influence caused by supplementing water
pressure, water return side should be fitted with an expansion water tank
.
The expansion tank
shall be installed 1~1.5m higher than the system, and its capacity accounts about 1/10 of the
water amount in the whole system.