12
Product introduction
2. Insulation should be installed on the water inlet/outlet to prevent condensate water or icing;
3. Water in heat exchanger should all be drained out during long shutdown in the winter to avoid
icing;
4. The diameter of water pipe should be the same as the diameter of unit connection (1-1/4 inch)
or larger.
5. Water flow switch should be installed on the heat exchanger water outlet pipe to operate cut-
off protection.
6. When there are many units in the Water Cooled VRF, in order to guarantee an equalized
water allocation among each unit, reversed return system should be used in water supply and
water return;
7. Install a gate valve for chemical cleaning in an easy position to handle.
8. Run the water pump to flush inside of water piping. Then, clean the strainer.
9. When install the unit, the upper unit must add water pans, prevent water flowing into the lower
unit.
10. When connect the water pipe, the water must through the water inlet into the double-pipe
heat exchange, otherwise the unit performance will become worse.
11. The pump is installed in the water system need starter. The unit only offers the pump control
signal, doesn’t offer the pump power supply.
12. Between the welding mouth of double-pipe heat exchanger and site pipe should use flexible
joint, to reduce the vibration.
13. For the convenience of maintenance and repair, install the hydraulic pressure gauge and
thermometer at the inlet and outlet pipe mouth.
14. The pipe and the joint need independent supporting, the supporting is not the unit.
15. All the connection pipes connected to the double-pipe heat exchanger should separate
cleaning before connecting, in order to avoid the foreign body into the heat exchanger.
16. In the system all may freeze pipes shall be heat preservation.
17. Pipe connecting need follow corresponding installation procedures. All pipes must be in line
with the local plumbing codes and regulations.
18. Pipe size should be equal to or greater than the interface unit size (DN32).
19. All the low position of the water system need to install drain valve, the water in the double-
pipe heat exchanger and the system can be completely ruled out.
20. Water flow should not exceed the range in the following table, or failures may occur.
Capacity
Water flow range (m³/h)
8HP
2.4-7.2
10HP
3.0-9.0
12HP
3.6-10.8
