Service manual

EP-300 SERIES PUMP INSTALLATION, OPERATION AND SERVICE MANUAL
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SECTION 6: PRESSURE SWITCH MOUNTING AND WIRING
6.1 Pressure Switch Installation
For connection to a pump, locate the two pressure
switch mounting holes on the pump frame. If replac-
ing an old pressure switch, you may need to drill two
holes in the pump frame (7/32" dia. approximately
13/16" apart).
FIGURE 9: Pressure Switch Mounting Hole
Location
6.1.1 Attaching Pressure Switch to Pump Inlet
Apply silicone sealant (600° F) to the threads of the
pressure switch and then screw the pressure switch
into the 1/8" NPT hole provided on the pump inlet.
See Page 11, Figure 4. Care must be taken to make
certain that the application of silicone does not plug
the orifice hole of the pressure switch. Without pump
verification, the system will not operate.
Using screws and locknuts included, mount the
switch to the pump frame. Thread the barbed fitting
into the threaded hole at the pump inlet. Cut the sili-
cone tube to the appropriate length to eliminate the
possibility of kinks and securely attach the hose to
the pressu
re switch and the barbed fitting.
FIGURE 10: Mounted Pressure Switch
FIGURE 11: Wiring - Pump Pressure Switch ONLY
Pressure Switch
Mounting Holes
(located on both
sides of pump frame)
Barbed
Fitting
Silicone Hose
Pressure Switch
Ground Screw
Common Terminal
Normally Open Terminal
Connect the wire leads provided to terminals 1 and 2
labeled (C) Common and (NO) Normally Open. Refer
to the pressure switch kit installation instructions or
control panel installation instructions for connection to
controls.