VISION 2PLT
Pag. 20
Rev. 02-18
USE AND MAINTENANCE MANUAL
SWITCHING ON THE VISION 2PLT ELECTRONIC CONTROLLER
After wiring the controller correctly, power up at 230VAC; the panel will immediately emit a
beep and all segments and LEDs come on simultaneously for a few seconds.
COMPRESSOR ACTIVATION/DEACTIVATION CONDITIONS
The
VISION 2PLT
controller activates the compressor when cold room temperature
exceeds differential (r0); it deactivates the compressor when cold room
temperature is lower than the setting.
CONFIGURATIONS
-
Control of 2 motor condenser units with 2 evaporators.
-
Control of 1 motor condenser unit with 2 evaporators.
-
Control of unit panel with 2 evaporators.
-
Control of 2 motor condenser units with 1 evaporator.
-
Control of 1 motor condenser units with 1 evaporator
Functional combinations are managed by nrC (number of compressors) and nrE (number
of evaporators) parameters.
SINGLE SET POINT WITH DOUBLE SYSTEM
With a single set point (parameter SEt=1, Considered set: Set 1) and double system
(parameter nrC=2) t
he controller initially ‘calls’ the compressor which has worked less if
rot=0 or calls compressor 1 and then 2 after the delay if rot=1. If the set point is not
reached within time DeL (1
st
level parameter) the second presser is switched on to help. In
event of Stand-by or power off compressors restart according to DeL parameter.
DOUBLE SET POINT
With SEt=1 (double set), there are 2 distinct set points for the 2 compressors. Setting of
the 2 set points is done by pressing the set key: press once and the set value will appear
with St1 alongside; the second time it is pressed the second set value appears with St2
alongside.
If rot=0 there will be compressor rotation (with reference to the lowest set point the
compressor that has worked the least will be started). If SEt=2 DeL parameter is ignored,
compressors are related to the setpoint: if the ambient temperature exceeds lowest
setpoint +r0 first compressor starts (and relative fans, if enabled), if the temperature
exceeds greater se r0 second compressor starts. In event of Stand-by or power off
compressors restart simultaneously (1 sec delay).
5.12
5.13
5.14
CHAP. 5 - Data programming
5.15
5.16
