Daikin EWAD730T-XLB2 [68/81] Hydraulic scheme

OPTIONS (TECHNICAL DATA)

60/73

Hydraulic scheme

Dual circuit unit without hydronic kit

Note: drain plug and threaded fitting are on the shell and tube exchanger

*Flow switch available as option (opt. code 58) safety valve set at 10 bar. Note: drain plug and threaded fitting are on the shell and tube

exchanger.

Water piping

The water system must have:

1.Anti -vibration joint in order to reduce transmission of vibrations to the structures.

2.Isolating valves to isolate the unit from the water system during maintenance.

3. Flow switch.

4. Manual or automatic air venting device at the system’s highest point.; drain device at the system’s

lowest point.

5.A suitable device that can maintain the water system under pressure (expansion tank, etc.).

6.Water temperature and pressure indicators to assist the operator during service and maintenance.

7.A filter or device that can remove particles from the fluid. The installation of the filter is mandatory.

The use of a filter extends the life of the evaporator and pump and helps to keep the water system in a

better condition. The water filter must be installed as close as possible to the chiller. If the water filter is

installed in another part of the water system, the installer has to guarantee the cleaning of the water pipes

between the water filter and the evaporator. The water used for filling the water circuit must be clean and

suitably treated.

8. Precautions should be provided to protect the unit against freezing.

9. The heat recovery device must be emptied of water during the winter season, unless an ethylene glycol

mixture in appropriate percentage is added to the water circuit.

10. If case of unit substitution, the entire water system must be emptied and cleaned before the new unit is

installed. Regular tests and proper chemical treatment of water are recommended after starting up the

new unit.