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(Spraying flow rate to the evaporator --- refrigerant)
5) Adjust the flow rate by the valve V-18.
Set the initial setting of the valve opining refer to table 5.1. After the operating conditions get
stable, adjust the valve finely to such an extent cooling capacity may not drop (the indicator
should be chilled water outlet temperature).
(Other refrigerant line)
6) No adjustment is needed because orifices are installed at the low pressure generator drain and
the condensed refrigerant line. Be sure to check through the sight glass if the solution level in the
evaporator or abnormal, such as refrigerant stays too much in the evaporator. Adjustment
indexes at rated cooling operation are shown in the following (the figures in ( ) show indexes at
rated heating operation).
(a) Dilute solution pressure at the low temperature heat exchanger inlet ---- See Table 5.3
(b) High pressure generator pressure --- Approx. 730 mmHg (approx. 670mmHg)
(c) Solution temperature at the high pressure generator --- 160 ~ 165℃ (140 ~ 145℃)
(Adjustment procedure of pressure and solution temperature at the high pressure generator)
Pressure at the High
Pressure Generator
High
High
Low
Low
NOTE : Above is a reference for adjustment. Since the operating conditions is affected by the non-
condensable gas in the chiller-heater especially at the initial operation, perform purge operation
sufficiently.
Table 5.3 Solution Flow Rate (Reference for Rated Cooling Operation)
Models
HDFN
80
100
125
150
180
Solution Temperature
at High Pressure
Generator
High
Low
High
Low
Dilute Solution Flow Rate
GL
GL1
3
m
/h
m
3.7 ~ 4.0
2.0 ~ 2.1
4.7 ~ 5.0
2.5 ~ 2.7
5.8 ~ 6.2
3.1 ~ 3.3
7.0 ~ 7.5
3.7 ~ 4.0
8.4 ~ 9.0
4.4 ~ 4.8
Phenomenon
GL flow rate is less
GL1 flow rate is much
GL1 flow rate is less
GL flow rate is much
GL2
3
3
/h
m
/h
1.7 ~ 1.9
2.2 ~ 2.3
2.7 ~ 2.9
3.3 ~ 3.5
4.0 ~ 4.2
33
Valve Operation
Open the valve V-31 a
little to increase GL
flow rate
Open the valve V-31 a
little to increase GL2
flow rate
Close the valveGL1 a
little to decrease GL1
flow rate
Close the valveV-31 a
little to decrease GL
flow rate
Inlet Pressure of Dilute
Solution of Low Temp.
Heat Exchanger
2
Kg/cm
G
0.5 ~ 1.0
0.5 ~ 1.0
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