17Instruction Manual
6. Reassemble diaphragm head following
Section 4.
7. Once the suction inlet and discharge outlets are
connected to piping system mount the switch
bracket (5090, Figure 2 Sheet 2) then the
remaining components should be tted nger
tight and oriented as shown.
NOTE:
Check the ow direction arrow on the check
valve. The check valve must be assembled with
the arrow pointed toward the pressure gauge
or pressure switch as shown in the gures.
Improper operation will result if the check valve
is not installed correctly.
8. Check all threaded and tube connections to
make sure they are tight.
IMPORTANT
9. Remove the pipe plug(s) and open the bleed-
valve(s). Follow the oil ll and start up procedure
in manual.
10. Leaving the bleed valve(s) open, run the
pump at 100% capacity and normal operating
pressure for 10 minutes. This procedure
purges any excess air and oil from in between
the diaphragms. If too much mineral oil was
placed between the diaphragms in step 5,
some will leak out from the bleed valve(s) at
this point. Lubricant leakage is acceptable.
11. Close the bleed valve(s) and replace the pipe
plug(s). The leak detector assembly is now
complete.
12. Additional oil may need to be purged again.
Return to step 10.
6.4 ELECTRICAL CONNECTIONS
THIS SECTION ONLY APPLIES TO MODELS
EQUIPPED WITH THE PRESSURE SWITCH
ALARM OPTION.
The diaphragm leak detection system can be
equipped with a pressure switch which can be
wired to activate an alarm or shut down the pump
in the event of a diaphragm failure. This switch is
either NEMA 4 (indoor / outdoor, weather and dust
proof) or Explosion Proof (for hazardous locations).
In both cases the switch relay is single-pole double-
throw (SPDT), normally open or normally closed
and rated for 15 amps, 125/240/480 VAC resistive.
6.5 NEMA 4 PRESSURE SWITCH WIRING
The switch terminals are accessed by removing the
two screws retaining the cover and cover gasket.
A 1/2” NPT conduit connection is provided in the
switch enclosure.
6.5.1 Wiring
Unscrew the switch cover to access the wiring
connections. A 3/4” NPT conduit connection
is provided in the switch enclosure. Replacing
the cover hand tight (5 full threads engaged) is
sufcient to maintain proper protection. Additional
tightening may be required to fully engage the
O-ring and seal enclosure for rain tight protection.
SECTION 6 - INSTALLATION & OPERATION (PRESSURE SENSING SYSTEM)
To Next Page