Bubble
‐
Up®
Jr
Interactive™
Radon
Removal
System
25
Appendix:
A
Part
Number
BUB
‐
075A,
7GPM
Standard
45/65
Pressure
Switch
For
use
with
only
115
volt
Bubble
‐
Up
pumps.
Patent
Number:
US
8,393,875
B2
A.
SETTING
PRESSURE
SWITCH
FOR
PROPER
OPERATION:
1.
Always
unplug
the
pressure
switch
before
removing
pressure
switch
cover
and
making
adjustments.
See
pressure
adjustment
instructions
under
the
cover.
2.
Adjust
the
large
spring
only
until
the
pressure
switch
turns
on
at
45
PSI.
3.
Do
not
adjust
the
small
spring.
This
will
keep
20
psi
differential.
B.
HOW
IT
WORKS
Pressure
switch
is
connected
to
the
venturi
throat
pressure.
When
there
is
½
to
1
GPM
flow
through
the
venturi
the
pressure
switch
senses
less
than
65
psi.
This
keeps
the
pump
running
at
low
flows.
7
GPM
Bubble
‐
Up
Mechanical
Pump
Control
Assembly
Manual
