79
➊
➋
➌
➍
© STULZ GmbH – all rights reserved EN/06.2019/G57
C7000 INSTRUCTIONS fOR a/C UNITS
The corresponding commands:
Components/Cooling/Valves
GE/CW valve
Up to 2 GE/CW valves can be configured in an A/C unit of the CW2 type. The
parameters, which concern the function method of the GE/CW valve, are dis-
tinguished in parameters which are valid for a specific valve and parameters
which are equally valid for both valves (GE/CW valve 1 and GE/CW valve 2).
These can be found in the menu "CW-control".
The start temperature
➊ for the GE/CW valve is entered as a positive differ-
ence to the temperature setpoint and serves to enable cooling or heating*. If
the actual temperature falls to or below the start temperature, the valve open-
ing is controlled to zero.
With the GE-off value
➋ you determine a water temperature which establish-
es the limit for GE-operation. If this value is exceeded, the GE-operation is
switched off by closing the valve and stopping the glycol pump.
In CW2 units
this can also be water temperature 2.
The GE-off value can also be defined as a negative offset
➌ to the return air
temperature in relation to the water inlet temperature 1.
If
T
water
> T
return air
rel.
GE operation is disabled.
*the GE/CW valve can also be used for
heating, see config menu.
Components/Cooling/Valves
GE/CW-valve
You can define a digital output
➍ in this menu on which the opening state of the
GE valve is output. If the valve opening is bigger than zero, the relay of the digi-
tal output is active. This signal can be used to control an external chiller.
gecwv 1 start 0.2
gecwv 1 off 22
gecwv 1 offrel 2
gecwv 1 dout 2
Config
Operate
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