ECKELMANN Case Controller UA 4 E Series, Инструкция по эксплуатации

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Firmware V3.13 21.04.2021 52/466
1.
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Superheat regulation
In order to determine the superheat there are a number of channels which the controller can use to calculate
the temperature corresponding to the suction pressure. The following priorities apply:
t
0
local Z1:
The local pressure transmitter is used for the regulation in zone 1 and zone 2, see menu 6-2-6! One MUST
be in stand-alone operation. When using the function “toZ2ctl” (see parameter “Fct. AIN2” in menu
6-2-6) the value t0 local Z1 is used for the regulation of zone 1 and the value t
0
local Z2 for zone 2.
t
0
over CAN bus:
A t
0
value received from a remote case controller via the CAN bus, see menu 6-2-6.
t
0
VS korr:
Transmitted from the pack controller via the CAN bus, see menu 6-1 and 6-3.
R5.x:
Generally, in order to guarantee high plant safety in both CAN bus and stand alone
operation, the
evaporator inlet sensor R5.x must always be connected.
The value from the pressure transmitter connected to analogue input 1 (AIN1, terminals 21/22) is preferred
for evaluation (see chapter On-off control ). If this is deactivated or fails, then recourse is made to the t
0
transmitted from a case controller or the pack controller via the CAN bus. If this is also not available, then the
evaporator input sensor R5.x is employed.
Limiting of the evaporator output sensor R6.x
Only UA 410 E AC,
Only controller type UK 100 E,
Only when the function of the analogue input AIN2 is set to “tc LT”, see menu 6-2-6. In cascade controller
operation it is possible that the measuring range at the evaporator output sensor R6.x is exceeded. In order to
ensure regulation in this limit range the sensor value is kept at the upper end of the measuring range for as
long as it is exceeded. With the sensor type L243 for example, this value is 50°C.
When employing the function “toZ2ctr” , see parameter “Fct. AIN2” (menu 6-2-6), in the event of a
failure of the pressure transmitter no recourse (fallback) is made to the suction pressure value
transmitted from the pack controller via CAN bus!
