Chore-Time 49000-4, Installation And Operator'S Manual, Page: 10 / 16

Installation PDS™ Control 4 and 8 Station
10
MW1402D
Water Column Gauge Calibration
Turn the red adjustment knob counter-clockwise (increase) until the water column gauge reads 8 inches, see figure
10.
After installation of the PDS regulators make sure all the water lines are flushed and charged. Then measure the
water column at one of the Volumatic™ regulators and confirm 8 inches of water column. If anything other than
8 inches is measured at the stand tube, the water column gage will need to be re-calibrated to that measurement.
To re-calibrate the water column gauge remove the plastic
cover with a small screwdriver. Then turn the calibration
screw
(see figure 9.) until the gauge reads the correct water
column height. Replace the plastic cover on the gauge.
Air Leak Test
Check each control and house for air leaks with the water column gauge at 8". To check for air leaks in the control
or the house pinch the incoming air supply tube to shut off the incoming air pressure. Watch the air pressure gauge
on the control, the gauge should not drop any more than 2 psi
[13.79 kPa] in 1 minute. If the air pressure does
drop faster than 2 psi [13.79 kPa] in 1 minute, refer to the trouble shooting section on page 14 . Repeat this
procedure for every PDS control.
Figure 9. Water Column Gauge
Calibration
Screw