Mark,
Thanks again for your advice.
After removing the junction with negative flow and changing the initial setting of FCV to closed, FCV started to open and closed at longer cycle (> 24 hurs), instead of open and close every several hours. First, I thought FCV started to close at right time between midnight and 6 am most of the time. However, when I adjusted other settings such as HSP pump controls and FCV flow rate, FCV does not close at mid night any more.
By trying different sets of controls, I found the followings:
1. FCV is controled by two control settings (The Clock Time does not seem to have any effect):
- IF Clock Time > 6:00 AM And Clock Time < 11:59 PM And R-2MG Hydraulic Grade < 829.00 ft
THEN FCV-4 FCV Setting = 2,500 gpm
- IF R-2MG Hydraulic Grade >= 832.99 ft THEN FCV-4 FCV Status = Closed
2. The following control to close FCV does not seem to have any effect.
- IF Clock Time >= 11:59 PM And Clock Time <= 6:00 AM THEN FCV-4 FCV Status = Closed
3. FCV pattern which was set according to your last advice also does not seem to have any effect.
With your advice, I now can close FCV according to its elevation, but not according to time.
I'd appreciate your further guidance on how to close the FCV according to time.
Thanks.
Yoko
