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➊
➋
➊
➋
➌
© STULZ GmbH – all rights reserved EN/06.2019/G57
C7000 INSTRUCTIONS fOR a/C UNITS
The corresponding commands:
Components/Cooling/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, both refrigerant circuits
can be equipped with a suction valve.
Depending on how you choose the start point for the valve, the compressor
starts with partial or full capacity.
If only one circuit is equipped with a suction valve in an A/C unit with two refri-
gerant circuits, the start values of the compressors and the suction valve must
be set so that the compressor with suction valve starts first.
Suction valve
In the first line you add the suction valve to the configuration by entering "1".
With "0" you disable the suction valve.
➊
With the parameter "AOUT" you adjust the analog output of the proportional
signal for the suction valve.
➋
In the third line you can set the minimum opening degree ➌. This setting serves
to determine the lower limit for the refrigerant mass flow. Below this limit the
possibility exists that an LP alarm will occur.
By setting the minimum opening degree the effective proportional range is
reduced.
Example:
With a gradient of 1 K and a minimum opening degree of 20% the effective
proportional range reaches 0,8 K.
With a gradient of 1 K and a minimum opening degree of 50% the effective
proportional range reaches 0,5 K.
5.4.3 Refrigerant circuit, optional components
suctionv 1 start 0.2
suctionv 1 grad 0.9
suctionv 1 conf 1
suctionv 1 aout 3
suctionv 1 min 20
ConfigOperate
Operate
Config
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