WattMaster WCC III part 4 - Manual (Page 154)

WCC3.EXE SCREEN DESCRIPTIONS
WCC III Technical Guide 3-150
Analog Global Dual Valve Mode
Valve 1 size:
One Valve/Pump fl ow size ratio may be a different size from the
other. Example: An 6 inch pipe verse a 8 inch pipe—the total fl ow
rate ratio would be 25% for valve 1 and 75% for valve 2. Both of
the Valve sizes must add up to be 100%.
NOTE: Valve 1 should always be the smaller of the 2 valves.
Valve 2 size:
One Valve/Pump fl ow size ratio may be different size from the
other. Example: An 6 inch pipe verse a 8 inch pipe—the total fl ow
rate ratio would be 25% for valve 1 and 75% for valve 2. Both of
the Valve sizes must add up to be 100%.
NOTE: Valve 1 should always be the smaller of the 2 valves.
Valve 1 proof of fl ow from:
This fi eld must have a valid WCC III binary input value and is
used as a feedback mechanism to ensure that the valve/pump has
actually turned on and is working properly. The proof of fl ow is
checked when the valve opening is greater than 10.0%. There is a
2 minute proof of fl ow delay, if after 2 minutes there is no proof of
fl ow (and Valve 1 is open more than 10.0%), valve 1 will open to
50.0% and valve 2 will modulate. If the proof of fl ow is fi xed and
re-detected, the valve will return to normal operation.
Valve 2 proof of fl ow from:
This fi eld must have a valid WCC III binary input value and is
used as a feedback mechanism to ensure that the valve/pump has
actually turned on and is working properly. The proof of fl ow is
checked when the valve opening is greater than 10.0%. There is a
2 minute proof of fl ow delay, if after 2 minutes there is no proof of
fl ow (and Valve 2 is open more than 10.0%), valve 2 will open to
50.0% and valve 1 will modulate. If the proof of fl ow is fi xed and
re-detected, the valve will return to normal operation.
Current State:
This fi eld displays the current state of the Dual Valves, and will be
listed as Modulate Valve 1, Modulate Valve 2, V1 Open - Modulate
V2, V1 Fail - Modulate V2, or V2 Fail - Modulate V1.
Modulate Valve 1, Valve 1 is modulating and Valve 2 is closed.
Modulate Valve 2, Valve 2 is modulating and Valve 1 is closed.
V1 Open – Modulate Valve 2, Valve 1 is fully open and Valve 2 is
modulating.
V1 Fail – Modulate Valve 2, the proof of fl ow from Valve 1 has
failed so Valve 1 opens to 50.0% and Valve 2 modulates.
V2 Fail – Modulate Valve 1, the proof of fl ow from Valve 2 has
failed so Valve 2 opens to 50.0% and Valve 1 modulates.
Confi guration:
This fi eld displays the current condition of this global, it displays
whether it is set up correctly or not. It will display either Normal,
Next GA non-extern, Bad V2 Dn Threshold, BadV12 Dn
Threshold, or Bad Valve Size.
Normal – Everything is basically set up OK.
Bad V2 Dn Threshold – the control input percentage for Valve 2
to close is greater than the control input percentage for Valve 2 to
open. The percentage for Valve 2 to open should be more than the
percentage for Valve 2 to close.
Bad V12 Dn Threshold – the control input percentage for Valve
1 to close and Valve 2 to continue to modulate is greater than
the control input percentage for Valve 1 to open and Valve 2 to
continue to modulate. The percentage for Valve 1 to close and
Valve 2 to continue to modulate should be less than the percentage
for Valve 1 to open and Valve 2 to continue to modulate.
Bad Valve Size – Valve 2 size is greater than Valve 1. One Valve/
Pump fl ow size ratio may be a different size from the other.
Example: An 6 inch pipe verse a 8 inch pipe—the total fl ow rate
ratio would be 25% for valve 1 and 75% for valve 2. Both of the
Valve sizes must add up to be 100%. Valve 1 should always be the
smaller of the 2 valves.
Next GA non-extern – this means the next global analog is not
EXTERNAL mode. The Dual Valve mode has two outputs. The
next global analog has to be set to EXTERNAL mode for this
mode to run.
Modulation starts with Valve 1.
During Valve 1 modulation,
If the control input exceeds _____ % for more
than stage time, Valve 1 will close and Valve
2 will modulate.
This user input is a percentage, 0 – 100, for if the control input rises
above this value for longer than the amount of stage time, then
Valve 1 will close and Valve 2 will start modulating.