24 - EN
V800
FUNCTIONING
V800 is an electronic expansion PULSE valve controller. It controls the minimum overheating vale read on evaporator output.
The regulation value is the percentage of valve opening
which is commutated in the percentage of VO output
opening depending on following parameters:
• U01 is the PWM period i.e. open/close valve sum time;
• U02 is the maximum valve opening %;
• U06 is the minimum valve useful opening %;
• U07 is the maximum valve useful opening %.
If the regulator drives an output greater or equal than U07,
th real output will be U02.
If the regulator drives an output lower or equal than U06,
the real output will be 0.
If the regulator drives a request greater or equal than U07,
for a time greater than U05 a maximum opening alarm
shows up to signal a critical plant condition.
% real output
% request
100%
100%
U7
U6
U2
