Dwyer AFS User Manual
Page 2
Maintenance . . .
Occasional cleaning when excessive contamination is present in the liquid is the
only maintenance normally required. To disassemble unit for cleaning: With
system shut down and no liquid in piping, remove piston plug from unit. Unit need
not be removed from system.
Electrical Connection . . .
1/2"
1-1/16"
1-1/4"
2"
Lead Wires,
Strain Relief
1/2" NPT
Conduit Connector
MAINTENANCE/REPAIR ...
Regular maintenance of the total system is recommended to assure sus-
tained optimum performance. These devices are not field repairable and should
be returned to the factory if recalibration or other service is required. After first
obtaining a Returned Goods Authorization (RGA) number, send the unit freight
prepaid to the following. Please include a clear description of the problem
plus any application information available.
Dwyer Instruments, Inc.
Attn: Repair Department
102 Highway 212
Michigan City, IN 46360
Flow Setting Adjustment...
Standard units are normally supplied with adjustment set at minimum flow -
adjusting screw slot (and vane within unit) in vertical position, as shown below.
Adjust unit on test stand or installed in system. With liquid (or gas) flow at desired
rate, adjust unit until switch first actuates (opens or closes, as desired).
Note: Vane is locked at Factory with set screw and must be unlocked prior
to any adjustment; then relocked after adjustment has been made.
Adjustment Screw with Slot in
Minimum Flow Position
Locking Set Screw
Dimensional Data . . .
Piping System
Unless otherwise specified, units are factory-calibrated in water for
in-line installation; in horizontal position, as shown above.
4-1/8"
Lead Wires
FLOW
FLOW
Piping System
2"
1/2" NPT
(Both Ports)