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6. Water Piping Work
6.1 Piping Connection
Example of basic water piping connection to the water source unit is shown below.
Perform the piping connection work for the water source unit while paying attention to the following.
● Make sure to select appropriate water pump (field-supplied) depending on water source unit model and
number of units. Refer to Section 6.2 for water flow rate and pressure drop for each water source unit
.
● Install gate valves at the inlet and outlet piping to isolate from other water circuit and allow service of the
water source unit.
● It is recommended to install service ports at an easy position to handle for chemical cleaning of plate heat
exchanger.
● Equip drain valve and automatic air discharge valves on the water piping.
The drain valve handle should be removed so that the valve can not be opened under normal
circumstances.
If this valve is opened during operation, trouble will occur due to water blow-off.
Drain valve should be set on lower points in water system, so as to discharge water in the plate heat
exchanger and system thoroughly.
Install automatic air discharge valves at the higher position where air is likely collect and in order to
discharge air in piping.
If air remains inside the water piping then it may decrease the operating performance and cause corrosion.
● Provide a 50 mesh or more water strainer at the water inlet side of water piping within
approximately 1~2m from the water source unit. Otherwise, plate heat exchanger may damage. In the
plate heat exchanger, water flows through a narrow space between the plates
.
Therefore, there is a possibility that freezing or corrosion may occur if foreign particles or dusts are
clogged. Also, install a cleanable water strainer at the portion close to the water inlet side of water pump.
Basic Water Piping Connection
Water
Source
Unit
F
Strainer
(50 mesh or more)
Pressure Gauge
(Required for water volume measurement)
Water Flow
Switch
Flexible Connection
Automatic Air
Discharge Valve
Gate Valve
P
Thermometer
Flushing Pipe
(Install when cleaning)
Recommendation
(Not Mandatory)
Service Port
(For cleaning heat exchanger)
Drain
Valve
Gate Valve
Water Flow Direction
Strainer (50 mesh or more recommended)
Water Flow Direction
NOTE:
Be sure to install horizontally on the water inlet
side. In case the water flow downwards, vertical
installation is allowed.
Summary of Contents for AVWW-114FKFW
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