ES-A-ACV-LF960GD-15-17 2115
Setting the Altitude Controls
STEP 1
Pre-set pilots as noted:
Altitude Control
– Adjust OUT, counterclockwise, backing pressure off the spring. This simulates a low tank setting which can be
gradually increased to the desired setting.
Opening and Closing Speed
– Turn the adjustment screws on the Closing Speed and Opening Speed Controls, if the main valve is
so equipped, OUT, counterclockwise, 1
½
to 2
½
turns from full closed position.
STEP 2
Energize the solenoid to check actuation and to confirm connection
to power source and so that initial valve filling is against the closed
solenoid.
NOTE:
In cases when testing is required prior to electrical
installation the solenoid can be manually engaged using the manual
override red knob on the end of the solenoid.
STEP 3
To ensure proper operation, any trapped air will need to be bled off
the valve cover during startup. The ACV includes a bleed valve, use
a flat head screwdriver to slowly open the valve (See Figure 1).
STEP 4
Pressure the line, by opening the upstream isolation valve slowly. Air
is vented through the air bleed valve. Tighten the fitting when liquid
begins to vent (See Figure 1).
Repeat the process until no air is trapped in the system.
STEP 5
Switch the solenoid to the open position (de-energize solenoid).
Setting the Altitude Pilot
STEP 6
Slowly open the downstream isolation valve.
STEP 7
If the valve remains closed as indicated by the stem position in
the position indicator (See Figure 2) and the tank level is known
to be below the desired level, SLOWLY turn the adjustment screw
IN, clockwise, by ¼ to ½ turn increments (See Figure 3).
This will cause the valve to start opening, filling the tank.
Additional clockwise adjustment may be necessary to raise the
level to the overflow line.
20
Counterclockwise to OPEN
bleed valve
Figure 1
Position Indicator
Clockwise to INCREASE
minimum tank level set
point.
Figure 3
Model 27 - Altitude Pilot
Figure 2
Position Indicator Stem in UP Position
Indicating Valve OPEN
© 2021 Watts
Installation, Operation and Maintenance - Series LF960GD-15-17
