Valve Capacity Reducing - MNF Parameter Regulation for Superheat: Self Adaptive or Manual Operating Mode • 29
See the figure below (Figure 16-1) for the behavior of
the capacity of the valve, when the MnF p
arameter is
adjusted.
16.6.1. Auto Zero Procedure (Go
Home Functions)
To prevent any possible wrong positions caused by a
long period of working for the step valve without
closing, the controller after gTH hours, as soon as the
opening open percentage is under 20%, will force a
“go home” procedure:
1. Close the valve at max speed until the complete
closure is reached.
2. Perform extra steps (Est).
3. Re-open to the requested regulation position.
This position is valid for all the valves and has to be
done at set speed for each valve.
Figure 16-1 - Capacity of Valve in Adjusted MnF Parameter
NOTE: During the soft start phase
(oPE, SFd), MnF parameter is not taken in
consideration and the capacity of the valve is
set by the parameters oPE and oPd,
respectively.
To Next Page
Loading...
Need help?
General
