ECKELMANN Case Controller UA 4 E Series - Connection of Pressure Transmitters; Humidity Sensors

Firmware V3.13
21.04.2021
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5.7.8 Connection of pressure transmitters / humidity sensors
Only UA 410 E AC
In order to measure the suction pressure at the case controller, a low pressure transmitter 0..10 bar can be
connected. The electrical connection of the pressure transmitter, i.e. humidity sensor, is carried out according to
the same principles as those familiar from the pack controller. The parametrisation and functionality of the two
analogue inputs AIN1/AIN2 (terminals 11/12 and 11/14) are performed using the menu 6-2-6. The actual value
is acquired via 4..20 mA. For further details, see chapter Belegung der 4..20 mA-Analogeingänge.
Thefollowingsettingoptionsareprovided:
Activation of the analogue input (whether it is used at all). For further details, see chapter
Überhitzungsregelung.
Selection of the used refrigerant (can be set for each sensor):
*Supported refrigerants: R404A, R744 (CO2), R134a, R410A, R717 (NH3), R22, R290, R407C, R507,
R1270, R402A, R502, R407F, R422A, R422D, R408A, R407D, R407A, R427A, R438A, R152a, R170,
R600, R600a, R449A, R450A, R448A, R455A, R447B, R1234ze, R1233zd, R1234yf, R513A
Adjustment of the analogue input to the pressure transmitter employed: Input of the lowest/highest pressure
values (factory side 0..10 bar)
Type of measurement:
Analogue input 1 (AIN1): t
0
(fixedsetting,cannotbeparametrised)
Analogue input 2 (AIN2): selection between t
0
, humidity, t
c
ort
c
LT
If the transcritical range is exceeded during the measurement of t
c
with the refrigerant R744 (CO
2
), the
temperature continues to be converted; however it no longer corresponds to the pressure. There is no
built-inlimitationat31°Cinthisversion.Currently,thepressureinrespectoft
0
/t
c
is neither measured
nor displayed, only the temperatures.
