22
Table 3.1 List of Protective Devices
Description
Symbol
Set Point
Active Condition
Protective Action
Protection Purpose
Pressure differential switch for
chilled/hot water
63EW
Approx. 80% of
rating flow
Contact to be open when
flow falls
Combustion shut-down, sol. pump
and refrigeration pump stop
Freeze and boiling prevention
Chilled water low temp. switch
TE-1
3.5
℃
Protected when temp.
falls
Do
Freezing prevention
Inter lock for cooling water pump
CWR
-
Voltage contact signal for
pump start
Instantaneous combustion shut-
down and dilution operation
High pressure generator
protection
Gas high pressure switch
63FH
120% of gas
rating pressure
Contact to be open when
gas pressure rises
Do
Abnormal combustion protection
(Applied for gas fired type)
Gas low pressure switch
63FL
50% of gas
rating pressure
Contact to be open when
gas pressure falls
Do
Do
(Applied for gas fired and oil fired
with proportional control type)
Air pressure switch
63DS
50% of rating
pressure
Contact to be open when
air pressure falls
Do
Do
(Applied for gas fired and oil fired
with proportional control type)
Flame detector
UV
－
Detect misfire and
reduced fire
Do
Do
Pressure switch for high pressure
generator
63GH
0kg/
㎠
Contact to be open when
pressure rises
Do
High pressure generator
protection
Float less switch for high pressure
generator
LC-01
－
Relay to trip when sol.
level falls
Do
Void combustion prevention
Temperature switch for high
pressure generator
TE-3
170
℃
Protected when sol.
Temperature rises
Do
High pressure generator
protection
Exhaust gas temperature switch
TE-4
350
℃
Protected when exhaust
gas temperature rises
Do
Abnormal combustion prevention
Over-current relay for forced fan
motor
49FM
Rating current
Relay to trip when motor
over-current
Do
Forced fan motor protection
Over-current relay for solution
pump #1 motor
M1-49
Rating Current
Rely to trip when motor
over current
Do
Solution pump Motor #1
Protection
Over-current relay for solution
pump #2 motor
M5-49
Rating Current
Rely to trip when motor
over current
Do
Solution pump Motor #2
Protection
Over-current rely for solution
pump #1 motor
INV1
Rating current
Do
Do
Solution pump #1 motor
protection(option)
Содержание HDFN-80-1400
Страница 11: ...11 Fig 1 1 External View of Chiller heater...
Страница 16: ...16...
Страница 20: ...20 Fig 3 5 Operation Flow Chart...
Страница 21: ...21...
Страница 35: ...35...
Страница 66: ...66 Fig 8 Lithium Bromide Temperature Specific Gravity Concentration Curve...
Страница 67: ...67...
