CPC MultiFlex PAK, Руководство пользователя

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PAK Configuration Screens MultiFlex PAK Hand-Held Terminal Interface • 41
8.4.1.4. 4 - CondSP
Screen 1
Cond TD STPT and Cond TD DeadBd. The
Cond TD Setpoint is the difference between the
condenser discharge temperature and ambient air
temperature the PAK will attempt to maintain.
When the condenser TD is higher than this set-
point, the PAK will activate fan groups. When
lower than the setpoint, the PAK will deactivate
fan groups.
The Cond TD Deadband is the range of dif-
ferential values around the Cond TD Setpoint
within which the setpoint is considered satisfied.
When the TD is within the setpoint deadband, no
fan groups will be activated or deactivated.
Fan ON Delay and Fan OFF Delay. The Fan
ON Delay is the amount of time the TD must be
above the Setpoint before turning ON a fan
group. The Fan OFF Delay is the amount of time
the TD must be below the Setpoint before turn-
ing OFF a fan group.
Screen 2
Disch Pres Max. If the discharge pressure rises
above this setpoint, the PAK will override TD
control and stage fan groups ON to bring down
the discharge pressure. The Fan ON Delay will
be observed as each stage is activated.
Disch Pres Min. If the discharge pressure falls
below this setpoint, the PAK will override TD
control and stage fan groups OFF to bring up the
discharge pressure. The Fan OFF Delay will be
observed as each stage is deactivated.
Screen 3
Disch Pres SP and Disch Pres DB. The Dis-
charge Pressure Setpoint and the Discharge Pres-
sure Deadband will be used as the fallback
setpoint and deadband if the TD calculation can-
not be made due to ambient temperature sensor
failure.
Screen 4
TD Min Amb Temp Min SP. The Ambient
Temp Minimum Setpoint is the minimum allow-
able value of the ambient air temperature used in
the TD calculation. If the ambient air tempera-
ture falls below this setpoint, the value of this
setpoint will be used as the substitute ambient air
temperature in the TD calculation.
Disable Interlock Discharge Pressure. When
the discharge pressure rises above the Interlock
Disable setpoint, interlock will be disabled to
prevent fans being locked OFF when needed to
lower the discharge temperature.
Screen 5
Cond Spray SP. The Condenser Spray SP con-
trols operation of the condenser spray output. If
the discharge pressure rises above the Condenser
Spray Setpoint, the PAK will activate the Con-
denser Spray output. The output will remain
active until the discharge pressure falls below
the Rtn2Nrml setpoint and remains there longer
than the Rtn2Nrml Time.
Cond TD SP: 8.3
DeadBand : 4.4
Fan ON Dly: 15 S
FanOFF Dly: 45 S
TD Control
Pressure Limits
Disch Max: 290
Disch Min: 100
TD Control Fail
Ambient Temp
DiscPresSP: 220
DeadBand: 4.0
TD Min Ambient
Temp SP: 1.7
DisableInterLock
Disch Pres: 305
CondSpray: 330
AmbLockOut: 24
Rtn2Nrml: 270
Off Delay: 30 M