GE Ecomagination AF-600 FP Programming Manual page 180

Parameter Description
PC-44 Staging Speed [RPM]
Range: Function:
0 [000 - Readout of the calculated value for staging
RPM 0 RPM] speed. When adding a fixed speed pump to
*
prevent an overshoot of pressure, the variable
speed pump decels to a lower speed. When
the variable speed pump reaches the staging
speed, the fixed speed pump is staged on.
Staging speed calculation is based on
parameter PC-42 Staging Threshold and
parameter F-17 Motor Speed High Limit [RPM].
Staging speed is calculated with the following
formula:
η
STAGE %
η = η
STAGE HIGH 100
where n is motor speed high limit and
HIGH
n is the value of staging threshold.
STAGE100%
PC-45 Staging Speed [Hz]
Range: Function:
0 [0 - Readout of the calculated value for staging speed.
Hz 0 Hz] When adding a fixed speed pump to prevent an
*
overshoot of pressure, the variable speed pump
decels to a lower speed. When the variable speed
pump reaches the staging speed, the fixed speed
pump is staged on. Staging speed calculation is
based on parameter PC-42 Staging Threshold and
parameter F-15 Motor Speed High Limit [Hz].
Staging speed is calculated with the following
formula:
STAGE %
STAGE = HIGH
100
limit and n
STAGE100%
threshold.
PC-46 Destaging Speed [RPM]
Range: Function:
0 [000 - Readout of the calculated value for destaging
RPM 0 RPM] speed. When removing a fixed speed pump to
*
prevent an undershoot of pressure, the variable
speed pump acccels to a higher speed. When
the variable speed pump reaches the destaging
speed, the fixed speed pump is destaged.
Destaging speed is calculated based on
parameter PC-43 Destaging Threshold and
parameter F-17 Motor Speed High Limit [RPM].
Destaging speed is calculated with the following
formula:
DESTAGE %
DESTAGE = HIGH
high limit and n
destaging threshold.
DET-620D
AF-600 FP™ Programming Guide
where n is motor speed high
HIGH
is the value of staging
where n is motor speed
HIGH
100
is the value of
DESTAGE100%
03/2016 All rights reserved.
PC-47 Destaging Speed [Hz]
Range: Function:
0 [0 - Readout of the calculated value for destaging
Hz 0 Hz] speed. When removing a fixed speed pump to
*
prevent an undershoot of pressure, the variable
speed pump acccels to a higher speed. When the
variable speed pump reaches the destaging speed,
the fixed speed pump is destaged. Destaging
speed is calculated based on
parameter PC-43 Destaging Threshold and
parameter F-15 Motor Speed High Limit [Hz].
Destaging speed is calculated with the following
formula:
DESTAGE %
DESTAGE = HIGH
100
where n is motor speed high limit and
HIGH
n is the value of destaging threshold.
DESTAGE100%
Illustration 3.72 Destaging Speed
3.24.5 PC-5# Alternation Settings
Parameters for defining the conditions for alternation of
the variable speed pump (lead), if selected as control
strategy.
PC-50 Lead Pump Alternation
Option: Function:
NOTICE
It is not possible to select other than [0]
Off if parameter PC-05 Fixed Lead Pump is
set to [1] Yes.
Lead pump alternation equalises the use of
pumps by periodically changing the pump that
is speed-controlled. This ensures that pumps
are equally used over time. Alternation
equalises the usage of pumps by always
selecting the pump with the lowest number of
used hours to stage on next.
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