The Digital Controller
ESIE07-05
2–36
Part 2 – Functional Description
3
1
2
4
5
Enable evaporator flow alarm
YES (MASTER); NO (SLAVES)
Enable condenser flow alarm
YES (MASTER); NO (SLAVES) Solo WHS
Evaporator flow alarm delay (if
enabled)
■
STARTUP DELAY = 20 s
■
OPERATING DELAY = 5 s
High discharge temperature setpoint
■
SETPOINT = 120 °C
■
DIFFERENTIAL = 5 °C
High pressure alarm setpoint
■
SETPOINT = 20.5 bar
■
DIFFERENTIAL = 05.0 bar
Low pressure alarm setpoint
■
SETPOINT = 01.0 bar
■
DIFFERENTIAL = 00.5 bar
Delay low pressure alarm
■
STARTUP DELAY = 120 s
■
OPERATING DELAY = 60 s
■
Ratio alarm setpoint
■
Min Load
■
Max Load
1.4
1.8
Delay pressure Ratio alarm
■
STARTUP DELAY = 180 s
■
OPERATING DELAY = 90 s
Transducers high
pressure alarm
Setpoint
Diff.
bar
20.5
05.0 bar
Transducers low
pressure alarm
Setpoint
Diff.
bar
-01.0
00.5 bar
Low pressure alarm
delays
Startup delay
Run delay
s
120
060 s
Pressure ratio alarm
Min Load Setp
Max Load Setp
1.4
1.8
Pressure ratio alarm
Startup delay
Run delay
180
090
s
s
ESIE07-05.book Page 36 Friday, December 21, 2007 3:21 PM