D–EIMWC00808-16HU - 16/64
Figure 5, Bypass, Mild Weather Operation
Water Piping
WARNING
If refrigerant charge of the unit is more than 500 kg it is necessary to install gas sensor on
water circuit to catch an eventual gas leakage.
Water Pumps
Avoid the use of 3600/3000-rpm (two-pole motor) pump motors. It is not uncommon to find that these pumps operate
with objectionable noise and vibration.
It is also possible to build up a frequency beat due to the slight difference in the operating rpm of the pump motor and
the Daikin centrifugal motor. Daikin encourages the use of 1750/1460 rpm (four-pole) pump motors.
Vessel Drains at Start-up
Unit vessels are drained of water in the factory and are shipped with the drain plugs in the heads removed and stored in
the control panel or with open ball valves in the drain hole. Be sure to replace plugs or close the valves prior to filling
the vessel with fluid.
Figure 4, Bypass, Cold Weather Operation
