WFC- SC(H) Series
.
Installation
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A balance valve should be installed in the cooling water inlet and a stop valve
installed in the cooling water outlet. Both valves should be placed in close proximity
to the chiller-heater along with thermometer wells for temperature measurement.
Additionally, drain (flush) valves should be installed between the balance/stop valves
and the machine to allow chemical washing of the absorber-condenser coils (see
figure 14)
If it is indicated that none of
the aforementioned matters
have been adequately catered
for, the authorized Yazaki
distributor should be contacted
for advice. Do not ignore these
contingencies; operating the
machine
without
proper
safeguards for both the cooling
tower and the chiller-heater
will void the chiller-heater
warranty.
4.4 Heat Medium Piping
The heat medium pipe work will most likely be a closed system. Accordingly, since
temperature of the heat medium may operate as high as 95°C, with a standard inlet
88°C, care should be taken with the expansion device. All considerations with respect
to hand valves in the other water circuits also apply to the heat medium circuit.
Depending on the type of system used to source the hot water to operate the chiller-
heater, a diverting valve in the heat medium circuit may be required. Should the
decision be made to use a three way valve, the approach to control outlined in the
following electrical circuit should be adopted.
Chiller-
Heater
Cooling water
pump
Balance valve
Thermometer wells
Stop
valve
Flush
valve
Flush valve
Valves & Thermometer Wells
Caution.
If the cooling water circuit
is a closed system, Do not
exceed 588.4kPa
Figure 14
Caution.
Do not exceed 588.4kPa in the heat medium circuit of the absorption
chiller-heater
