Unigas KPBY70, Manual Of Installation - Use - Maintenance

Page: 186 / 193

MANUALE USER SUPPORT
MULTI-THERMOSTAT
MCX06C
MCX06C is a multi-thermostat with four 100k NTC inputs. It can control up to 4 temperatures showing them
(not more than 2 at the same time) on a couple of displays.
It is used to check and adjust oil heater temperatures. it works as follows:
as soon as the burner control gives the GO to the digital 1 input (terminals DI1-COM), the adjustment program runs
(the relevant LED is ON). Reading the outlet temperature through the probe
Pb3
(terminals AI3-COM), a PID
signal is produced. This signal becomes the set-point for the electric resistors. The electric resistors temperature is
read through the probe
Pb1
(terminals AI1-COM) so that a second PID signal is produced. This second PID drives
a couple of SCR by means of 0-10 V impulses in order to control the electric resistors temperature.
When the burner is in stand-by, resistor set-point is kept at the temperature set in parameter "
p30
" (see parameter
group
REG
).
Probe
Pb4
(terminals AI4-COM) controls the inner heater temperature. As soon the relevant set-point is got, it
drives the output number 4 (terminals C4-NO4) linked to the relais KTCN. This allows the oil pump to start and also
the burner control proceeds with its cycle.
When set-point
trS
is got to, output number 5 is ON (terminals C5-NO5) linked to the relais KTRS. It switches the
resistors off and activates an alarm on the device.
Probe
Pb2
(terminals AI2-COM), when fitted, drives output number 2 (terminals C2-NO2) linked to the relais KTCI.
This allows the burner control to proceed with ignition.
See below the set-point recommended figures.
User interface:
Device:
Note :
In normal operation, the display A shows the oil tank resistor temperature (probe Pb1).
In normal operation, the display B shows the oil output temperature (probe Pb3).
Alarm Display A Display B
Trains
output
Adjustment
program
running
ESC
button
/
UP
button/
one step
back on the
menu
Escape from the
chosen parameter
/back to the previous
menu
ENTER
button/
Confirmation/ahead
to the next
menu/enter the
parameter to modify
DOWN
button/
one step forward
on the menu
Not used
Warning
COD. M12924CA Rel. 0.5 03/2016