Stulz C7000 - Refrigerant Circuit, Standard

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➊a
➊b
➋a
➋b
➌
➎
b
➊a
➋a
➋b
T/°C
➊b
© STULZ GmbH – all rights reserved EN/06.2019/G57
C7000 INSTRUCTIONS fOR a/C UNITS
The corresponding commands:
Components/Cooling
Compressor/16
The parameters in the first four lines can be adjusted separately for compres-
sor 1 till 6.
The start temperature for the compressor is entered as a positive difference to
the setpoint.
Two different start temperatures
➊a,➊b + hysteresis ➋a,➋b for summer and
winter operation can be entered.
The compressor pause
➌ is entered in seconds and delays the restart by the
adjusted time. This reduces the number of possible compressor starts per
interval and has a positive effect on the compressor service life.
Alarm parameters:
Compressor alarm delay, see menu Operate/values/refrigerant
Low pressure alarm delay, see menu Operate/values/refrigerant
Winter start delay
After the compressor start the low pressure alarm can be inhibited for an
adjustable time
➎b. If the unit is equipped with two compressors, the adjusted
time is valid for both compressors (1 and 2). This time avoids a low pressure
alarm right after the compressor start which could occur when outside tempe-
ratures are low. The effect of this parameter does not depend on the summer/
winter operation.
setpoint
Comp.
ON
OFF
5.4.2 Refrigerant circuit, Standard
Compressor
The compressor is incorporated in the A/C unit as standard. There is also the possibility to control an external
compressor. An external and internal (incorporated) compressor can not be controlled simultaneously.
Set the compressor type by the following commando:
comp 1 type 1 (incorporated compressor)
or:
comp 1 type 2 (external compressor)
By setting the compressor type different parameters of the compressor menu are effective.
On the following five pages the parameters for the internal compressor are explained.
Compressor, internal
comp 1 startsum 0.6
comp 1 startwin 1.2
comp 1 hyssum 0.7
comp 1 hyswin 0.7
comp 1 pause 180
winterdelay 180
Operate