Design Of A Compressor And Pump Control; Procedure; Sketch; Functions - Danfoss ADAP-KOOL AK-HP 780 Design Manual

Design of a compressor and pump control

Procedure:

1. Make a sketch of the system in question
2. Check that the controller's functions cover the required
application
3. Consider the connections to be made
4. Use the planning table. / Note down the number of connections
./ add up
5. Are there enough connections on the controller module? – If
not, can they be obtained by changing an ON/OFF input signal
from voltage signal to contact signal, or will an extension
module be required?
6. Decide which extension modules are to be used
7. Check that the limitations are observed
8. Calculate the total length of modules
9. The modules are linked together
10. The connection sites are established
11. Draw a connection diagram or a key diagram
12. Size of supply voltage/transformer
1

Sketch

Make a sketch of the system in question.
2

Functions

Application
Regulation of a compressor group
Regulation of receiver temperature
Regulation of compressor capacity
Regulation sensor = Sctrl
PI-regulation
Max. number of compressor steps
Max. number of unloaders each compressor
Identical compressor capacities
Different compressor capacities
Sequential operation (first in / last out)
Speed regulation of 1 compressor or 2 parallel compressors
Run time equalisation
Min. restart time
Min. On-time
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AK-HP 780
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Heat pump controller RS8GF202 © Danfoss 2015-08
Follow these 12
steps
Oil management
Oil injection in compressor. Shared or individual
Receiver pressure control
Monitoring of oil level in receiver
Management of oil level in oil separator
Reset of oil management
Cutout of compressors at oil failure
Safety relays during forced compressor control
Temperature reference for Sctrl
Override via "night setback"
Override via "0 -10 V signal"
Regulation of receiver temperature
Regulation sensor. = S7
On/off control of pump
Speed regulation of pump
Safety functions
Min. suction pressure
Max. suction pressure
Max. discharge pressure
Max. discharge gas temperature
Min. / Max. superheat
Safety monitoring of compressors
Common high pressure monitoring of compressors
General alarm functions with time delay
Miscellaneous
Extra sensors
Option for connection of separate display
Separate thermostat functions
Separate pressostat functions
Separate voltage measurements
Max. input and output
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100
AK-HP 780