ECKELMANN VS 300, Operating Instructions Manual

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Function of VS 300
32 Doku-Version 2.05 - Firmware 2.10 - 15. September 2017
Compressor actuation with speed control:
Actuation of the relays for enabling the frequency changer and activating the bypass takes place according to
the following times:
‐ The speed adjuster is enabled immediately. However, at minimum the basic time t = t
b
must elapse between
two successive events of enabling the speed adjuster.
‐ Power line bypass after the maximum temperature has been exceeded with speed control is enabled after
the basic load time has elapsed.
‐ Unloading on elapse of basic time and variable time
Compressor actuation with refrigeration point control:
If the compressors are controlled directly via a refrigeration point and not via suction pressure, the variable actu­
ating time t
v
is 0. Actuating time then only consists of the basic time t = t
b
.
Compressor actuation via refrigeration points is only meaningful with step control.
4.3.10 Determining the low-pressure setpoint
In the parameter list S3, i.e. under the menu item System Configuration (see chapter 7 - Parameter List and
Menu Structure - Setpoints System Configuration) the parameters for
- Enable room temperature
- Enable humidity
are set to '0' (i.e. 'OFF') and the address of the controller from which the data should be obtained is set to
'---'.
However, when the VS 300 is networked via a CAN Bus module (see chapter 1 - System Configuration) with
other pack controllers (VS 3010, VS 3010 BS or FS 3010), it is possible to employ additional values for the t
0
setpoint evaluation.
The evaluation of the t
0
setpoint can then be carried out relative to the room temperature (setpoint adjustment).
The parameter for 'Enable room temperature' must be set to 'ON' in this case.
The room temperature must be provided via CAN Bus by another pack controller (VS 3010, VS 3010 BS or
FS 3010) within the system. This controller must be addressed by the VS 300 via an appropriate parameter
('Node Number for Ambient Data' see chapter 7 - Parameter List and Menu Structure - Setpoints System Con­
figuration).
t
0
= t
0
setpoint
t
0_max
= maximum t
0
setpoint
t
0_min
= minimum t
0
setpoint
tr = current room temperature
t
r_max
= maximum room temperature for setpoint adjustment
t
r_min
= minimum room temperature for setpoint adjustment
With a room temperature of t
r
> t
r_max
or t
r
< t
r_min
the setpoint t
0
is specified as a constant as follows:
for t < t
r_min
t
0
= t
0_max
for t > t
r_max
t
0
= t
0_min