EP-300 S
ERIES
P
UMP
I
NSTALLATION
, O
PERATION
AND
S
ERVICE
M
ANUAL
14 of 31
SECTION 6: PRESSURE SWITCH MOUNTING AND WIRING
6.1 Pressure Switch Installation
For connection to a p
u
mp, locate the t
w
o press
u
re
s
w
itch mo
u
nting holes on the p
u
mp frame. If replac-
ing an old press
u
re s
w
itch, yo
u
may need to drill t
w
o
holes in the p
u
mp frame (7/32" dia. approximately
13/16" apart).
FIGURE 9: Pressure Switch Mountin
g
Holes
6.1.1 Attachin
g
Pressure Switch to Pump Inlet
Apply silicone sealant (600 °F) to the threads of the
press
u
re s
w
itch and then scre
w
the press
u
re s
w
itch
into the 1/8" NPT hole pro
v
ided on the p
u
mp inlet.
See Page 12, Figure 4
. Care m
u
st be taken to make
certain that the application of silicone does not pl
u
g
the orifice hole of the press
u
re s
w
itch. Witho
u
t p
u
mp
v
erification, the system
w
ill not operate.
Using scre
w
s and lockn
u
ts incl
u
ded, mo
u
nt the
s
w
itch to the p
u
mp frame. Thread the barbed fitting
into the threaded hole at the p
u
mp inlet. C
u
t the sili-
cone t
u
be to the appropriate length to eliminate the
possibility of kinks and sec
u
rely attach the hose to
the press
u
re s
w
itch and the barbed fitting.
FIGURE 10: Mounted Pressure Switch
FIGURE 11: Pump Pressure Switch Wirin
g
Pressure Switch
Mounting Holes
(located on both
sides of pump frame)
Barbed
Fitting
Silicone Hose
Pressure Switch
Gro
u
nd Scre
w
Common Terminal
Normally Open Terminal
Connect
w
ire leads pro
v
ided to terminals
1
and
2
labeled
(C)
Common and
(NO)
Normally Open. Refer
to press
u
re s
w
itch kit installation instr
u
ctions or con-
trol panel installation instr
u
ctions for connection to
controls.
Summary of Contents for EP 301
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Page 37: ...SECTION 13 THE ROBERTS GORDON EP 300 SERIES PUMP WARRANTY 31 of 31 ...
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