Watts AERCO Edge [ii] - Page 141

Edge [ii] Controller Operation Manual
SECTION 6 – ADVANCED SETUP
OMM-139_E • 8/25/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 141 of 196
Figure 6.3.4.8-3: Operating Controls: Manual Valve Balancing Screen
7. Select the water Inlet to use to calculate T, either Upper or Lower.
8. Allow approximately 20 seconds per boiler for the T values of all units to stabilize before
continuing.
9. Press on the square of the first unit you want to balance; the box turns grey with white text.
Do not start with any of the units with larger T values.
Figure 6.3.4.8-4: Operating Controls: Manual Valve Balancing Screen
10. Use the Valve Signal controls to adjust the voltage sent to the isolation valve. Note the
following:
• Before Balancing, fully open = 0.00V, fully closed = 10.00V
• To view the current voltage, press the data entry field between the + and – controls.
• If the current T is below the target, raise T by raising the voltage sent to the
isolation valve; this reduces the isolation valve’s “fully open” position (reducing outlet
water flow) thereby increasing outlet water temperature.
T
Voltage
Valve Position
• There are two ways to change the voltage sent to the isolation valve:
o Use the + and – controls to change the voltage by 0.01V per push.
o Press the data entry field, type any value from 0.00 to 10.00V in, then press Save.
• The effect of voltage adjustments is not linear across the full 0 to 10V range. As the
voltage approaches 0V, small voltage changes change flow rate by a greater percent and
therefore have a greater effect on T.