LG RCWFH Series Instruction Manual page 20

20
Installation
No. Item
Evaporator &
14 Relief Valve condenser
Vane Full Close
15 Vane motor
Interlock
Temperature 6 locations in-
16 Sensor Abnor- cluding chilled
mal water nozzle
4 locations in-
Pressure Sen-
17 cluding Evapo-
sor Abnormal
rator shell
18 Overload relay Control panel
Evaporator
Hot Gas By-
19 shell, Con-
pass Valve
denser shell
Measurement Item
Location
Relief valves
shell
Operability of temper-
ature sensors
Each temperature
sensor
Each pressure sensor
Current
Guide vane / hot gas
valve opening
Table 3. Safety devices
Description
To prevent the accident by unexpected fire, and
so on which can cause pressure increase in the
chiller, the relief valve will be operated and ex-
haust the refrigerant into the air if the pressure
exceeds more than the standard.
If the chiller is used in a closed environment,
please install a pipe that starts from the relief
valve to the outer air.
To minimize the starting current, it is a function
to enable the compressor to operate only after
full close of the guide vane installed at the inlet
of the impeller.
It alarms when temperature sensor is not con-
nected or due to the sensor's own flaw.
It alarms when pressure sensor is not connected
or due to the sensor's own flaw.
If overload is imposed on compressor motor or
oil pump motor, it stops the motor.
It prevents frequent start ups at low load, and
hot gas bypass valve opens proportionally when
vane becomes 30% or lower.
At this time, hot refrigerant gas of condenser
goes to evaporator and makes certain chiller load
to prevent surge and to prevent frequent startup
stop of the chiller.
Quan-
tity
1
1
1
1
1
1