ECKELMANN VS 3015 C, Инструкция по эксплуатации

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TRANSM. POS: XXXXX Description Input Default Dim.
MP-Transducer → Selection of signal interface pressure transmitter MP (4..20 mA or 0..10 V) → Screen 3-1-b-c
MP-Min XXX b Pressure at 4 mA or 0 V at the output of the MP pressure sensor 0..2.0 1.0 bar
MP-Max XXX b Pressure at 20 mA or 10 V at the output of the MP pressure sensor 23.0..100.0 60.0 bar
5.3.1 Low pressure transmitter Z2 (LP-Z2)
For installations in which the normal temperature (NT) zone is regulated using a VS 3010 C and a low
temperature (LT) satellite compressor is activated directly using a case controller with electronic injection
valves, the pack controller can determine the suction gas temperature of the LT circuit (Z2 circuit) and transmit
this to the case controller via CAN bus for determining the superheat. This enables superheat regulation for the
case controller of the LT circuit (Z2 circuit) using the evaporator outlet temperature and suction gas
temperature.
In order to measure the suction gas temperature of the LT circuit (Z2 circuit), a low pressure transmitter with a
measuring range from 1 to 26 bar must be connected to the third analogue input (terminals 41/42). The function
is activated using the
Transducer Z2 (menu 3-1).
5.4 Low-pressure Regulation
The low-pressure regulation has the task of maintaining the suction side pressure at a specified setpoint. The
controller provides two different methods for this regulation task:
• Step controller
Regulation by loading and unloading compressor stages or compressor capacity stages
• Combined control
Regulation using a speed-controlled compressor in combination with one or more fixed-speed
compressors
The setpoint is specified depending on the room temperature or the refrigeration requirement.
Damage to the system and stock loss: Incorrect parametrisation of the pressure transmitters can
result in high impairments of the functions! If any of these parameters is changed, the message Sens
type change is sent!

Practical tip using the example of the "connection of a pressure transmitter - 1 .. 7 bar": The
indication on the pressure transmitter here (> -1 bar) is obviously relative to the ambient pressure. The
adjustment of the pressure transmitter in the controller is carried out using absolute pressure values
(the absolute pressure cannot be negative). In order to parametrise the above pressure transmitter with
the relative pressure indication - 1 bar (at 4 mA or 0 V) and 7 bar (at 20 mA or 10 V), the ambient
pressure (1 bar) must be added. The input in this example is thus: 0..8 bar.

The CAN bus address and the temperature zone Z2 of the pack controller supplying this pressure must
be entered in the case controller !
