AIR CONDITIONING

C7000 Advanced
A3
Control
The graphics A-C show for a DX2-
unit how you obtain a double proportional
control range by approaching
the stop point of the 2nd compressor
to the start point of the suction
valve.
Valves
Suction valve
The start temperature for the suction valve
is entered as a positive difference to the
room temperature setpoint. ➊
You can adjust a gradient, which determines
the temperature range in which
the valve opening increases from 0 to
100%.➋
If the A/C unit is equipped with two refrigerant
circuits, only the first refrigerant circuit
can be equipped with a suction valve.
Depending on how you choose the start
points for the compressors you can exploit
the proportional control range of the suction
valve to a maximum.(see examples)
The suction valve has a control range of
50% - 100% of the compressor cooling
capacity.
C7000 PT2
➊
➋
b3
./Suction val 1 □ 27
→Start 0,0 K
+Gradient 0,5 K
On 0,0 %
The surrounded numbers refer to the corresponding
passages in the descriptive text.
The operation status/opening degree of the
suction valve is displayed in the last line.
Graphic A Graphic B Graphic C
Suction
Suction
valve
valve
Suction
valve
Comp. 1 Comp. 2
Comp. 1 Comp. 2
Comp. 1 Comp. 2
Cool.
cap.
200%
Setpoint
Cool.
cap.
200%
Setpoint
Cool.
cap.
200%
Setpoint
100%
75%
50%
Comp. 2
Comp. 1
175%
100%
75%
50%
Comp. 2
Comp. 1
150%
100%
75%
50%
Comp. 2
Comp. 1
➊
➋
➊
➋
➊
➋
C7000
The corresponding commands:
➊
➋
suctionv 1 start 0,2
suctionv 1 grad 0,9
Times are entered in seconds.
The surrounded numbers refer to the corresponding
passages in the descriptive text.
E/1006/57/47