Installation
Schematic Diagram of Water System
Symbol
Description
Check valve
Automatic exhaust valve
Water filter
Stop valve
Thermometer
Pressure gauge
Water pump
Flexible connection
Expansion tank
Electronic water processor
3-way valve
2-way valve
Symbol
Description
Fan coil
Fan coil
Fan coil
Fan coil
Heater
The chilled water pipelines may be connected as per relevant procedure when the unit is installed in
place. Such pipelines shall be free from any foreign matter, and must conform to local piping regulations
and rules.
1. Before unit operation, thoroughly flush all chilled water pipelines to ensure that they are free from
any foreign matter. Note: Do not flush any foreign matter into the evaporator.
2. Water must flow into the heat exchanger via the inlet. The opposite water direction through the heat
exchanger may degrade the unit performance, and give rise to fault in flow switch.
3. The water pump installed in the water pipeline system is equipped with a starter, and directly pumps
water into the heat exchanger of the water system.
4. Tubing and connectors must not be mounted on the unit but independently supported.
5. The nozzles and connectors of the heat exchanger shall be easily disassembled for operation,
cleaning and inspection over the evaporator nozzle.
6. The evaporator is provided with a 40-mesh filter, which must be installed at the water inlet of the unit
and insulated (see the above diagram).
7. The heat exchanger ports and the site pipelines shall be flexibly connected to reduce vibration
transmitted to buildings.
8. To facilitate troubleshooting, a thermometer or pressure gauge shall be installed on the water inlet
and outlet pipelines. Pressure or temperature instrument are not provided with the unit and are at
users’ own expenses.
9. Drain ports shall be arranged at all low points of the water system to ensure that water in the
evaporator and the system is completely discharged; exhaust valves shall be arranged at all high
points to vent air in the pipelines. The exhaust valves and drain ports are not insulated for easy
troubleshooting.
10. All water pipelines in the system exposed to frost shall be thermally insulated.
11. Outdoor chilled water pipelines shall be covered with an auxiliary heating tape and insulated with 20
mm thick thermal insulation material, so as to avoid frozen or ruptured pipelines due to low
temperature. The power supply of the heating tape shall be equipped with a separate fuse.
12. Where the ambient temperature is below 0℃, or the unit is to idle for a long time, please discharge
water from the unit through the water outlet pipeline connected with the plate heat exchanger of the
unit. If no water discharge is required for the unit in winter, do not cut off the power supply. The fan
coil in the water system must be provided with a 3-way valve to ensure that the water system is
smoothly circulated after the winterizing water pump is started.
CAUTION
The bypass pipes and stop valves of water inlet and outlet pipelines shown in the above diagram must be installed to
facilitate cleaning of other systems outside of the water pipeline prior to the unit commissioning. During maintenance, the
water pipelines of the heat exchanger may be cut off without interference to other heat exchangers.
10
Basic requirements
◆
◆
To Next Page
Loading...
