30

WFC- SC(H) Series .Installation
- 9 -
4.2 Chilled-Hot Water Piping
Water supply and accommodation of expansion of the chilled water circuit is afforded
by either an open cistern or closed expansion tank with check/pressure reducing
valves as shown in figure 11.
Plan piping with a rising grade of 1/200. And where high points exist in the piping
circuit, install purge valves to expel trapped air.
Valve & Thermometer Wells
Chiller
Heater
Chiller-
Heater
Chilled-hot
water pump
Fan coil
Fan coil
Expansion
tank
Closed System
Open System
Water supply
Cistern
1000mm Minimum
Water supply
Check/reducing
valve
Relief
valve
Chilled-hot
water pump
Chiller-
Heater
Chilled-hot water pump
Drain valve
Stop
valve
Balance
valve
Thermometer
wells
Manual vent valve
Caution.
Do not exceed
588.4kPa in the
chilled-hot
water circuit
of the
absorption
chiller-heater
Caution.
Do not install any valves in the expansion pipeline
Figure 11
Figure 12