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Table 5.2 Functions and Initial Settings of the Valve Opening for Heating Operation
Symbol
Name
V-7
Refrigerant
vapor valve for
change-over
between cooling
and heating
(Angle valve)
V-12
Solution valve
for cooling and
heating
(Diaphragm
valve)
V-16
Refrigerant
damp valve
(Diaphragm
valve)
SV4
Solenoid valve
for heating
V-30
Dilute solution
distribution flow
rate control
(manual butterfly
valve)
Location and Function
Location
Refrigerant vapor line
from the high pressure
generator
Function
Maintain the required
pressure differential
between the high
pressure generator and
the evaporator
Location
By-pass line from the
dilute solution pump
discharge to the
refrigerant pump
discharge
Function
Mix refrigerant with
dilute solution and make
further dilute
Location
By-pass line from the
refrigerant pump
discharge to the
absorber
Function
Location
Intermediate
concentrated solution
by-pass line By-pass line
from the high
temperature heat
exchanger outlet to the
concentrated solution
pump suction line
Function
Make intermediate
concentrated solution
flow easy
Location
Dilute solution line Branch
line from the low temp.
heat exchanger outlet to
the low pressure
generator inlet
Initial Setting
for valve
Opening
Fully opened.
Adjust the valve
opening, so that
the pressure of
high pressure
generator will be
a reasonable
value.
Fully opened.
Fully closed.
Fully opened.
(electrically)
Fully closed.
31
Remarks
Fine adjustment of
the high pressure
generator is required
so that intermediate
concentrated solution
may return to the
absorb easily in the
high pressure
generator at low load
* If intermediate
concentrated solution
stays in the high
pressure generator, it
may lead to
crystallization (Closed
at cooling operation)
Be sure not to open
the valve
excessively .
Excessive opening
may reduce dilute
solution flow rate to
the high pressure
generator. (Closed at
cooling operation)
(Fully closed at
cooling operation)
(Fully closed at
cooling operation)
360RT and over only.
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