Haier CA0035EAND Service Manual page 31

6.5 Waterway design.
Each pipe joints are posted out of the water mark, even when the tube should pay attention to do the
following:
1) Modular units of air conditioning water-side heat exchanger should be on-site installation of a 40-mesh or mesh
diameter of less than 1.0mm mesh Y filter (side must have its own air conditioning filter with unit,), the filter
should be installed in as close to the inlet connection of the position and be warm.
2) The heat exchanger must be installed bypass pipe and a bypass valve so that unit before commissioning
external water system cleaning. During the maintenance period, it can be cut off without interfering with other
heat exchanger waterways; took heat exchangers and pipe joints should be easy to remove, easy to operate
and clean, while easy to check the evaporator mouthpiece.
3) To facilitate maintenance, it should be into the outlet pipe on the way a thermometer or pressure gauge. Units
not equipped with pressure and temperature instruments, users need to buy their own.
4) The flow through the inlet into the heat exchanger must. As the opposite direction of flow of the heat exchanger
unit performance will be poor.
5) On the water side of the heat exchanger inlet pipe, a flow controller must be installed in order for the unit to
achieve disconnection protection. Now cooled module total heat recovery unit on the whole target type flow
controller as standard
6) The pump is installed in the water system needs with a starter. Hydraulic pump directly into the heat exchanger
water systems.
7) The water in front of the user with the unit connected, the entire piping system must be cleaned. See
"Commissioning" section. Then remove the filter strainer clean and reloading, make sure none of the particles
and impurities pipeline before connecting with the unit.
8) And the unit is connected to the inlet and outlet pipe joints should be soft joints, vibration generated when the
work so that the unit is not transmitted to the line.
9) In order to ensure the normal operation of the water system, the expansion tank should be installed. To ensure
that the first open and then open the pump unit, the unit should be installed in the flow switch on the water
mains, and lead to the host's W1, W2 terminals on.
10) All low position water drainage system should be set up interfaces, the evaporator and the water in the system
to completely exclude; all positions high point vent valve shall be provided in order to remove the air duct.
Exhaust valve and the outlet of the heat does not make for easy maintenance.
11) The unit normal operation, the valve handle must be removed to ensure that the valve can not be opened, as
the unit is running the drain valve open by mistake, an accident can occur without water.
12) On the water side of the water, an auxiliary heating tape to wrap and insulate (wrapping insulation material
thickness of 20mm) to prevent pipes freezing at low temperatures the cracking and to prevent condensation
on the pipe surface. Including connection pipes and flanges of the heat exchanger. Plus tropical power shall be
provided with a separate fuse.
13) When the water-side industrial water use will rarely produce scale, but use well water or river water will
produce more scale and sand and other sediment. Therefore, these water before flowing into the chilled water
system must be filtered and softened with demineralized water equipment. If sand and mud deposited on the
evaporator, will block the flow of chilled water, leading to the freezing of the accident, it should analyze water
quality, such as PH value, conductivity, chloride concentration, sulfur ion concentration prior to use.
29