5
running. Its sole purpose is to flex,
due to water pressure when the
pump turns on, and form a leak-
proof seal between the pump and
the discharge elbow.
10. Float Switches
Mount the float switch mounting
bracket to the door and frame
assembly using
3
/
8
” - 16” stainless
steel screws. Include a dielectric
gasket (by others) between
dissimilar metals to avoid
galvanic corrosion. Allow excess
float cable to loop over mounting
bracket. The sump level is
controlled by Hydromatic 3900
mercury switch controls. The
float is held in position in
the sump by a weight attached to
the power cord above the float.
The cord supports the float and
is adjusted for height from the
surface. Duplex systems use three
controls: one at all pumps off, one
set at one pump on, and one set for
both pumps on. Pumps alternate
operation on each successive
cycle with a Hydromatic Control
Panel. The alarm level is usually
set above the override (both
pumps on) level so the alarm
will signal only if the override
level is exceeded. However, some
engineers prefer to have the alarm
set below the override level as it is
possible for one pump to fail and
the other to operate on the override
level with the sump level never
reaching the alarm level. Do not
let floats rest against basin wall or
bottom or entangle with each other
or pump(s).
11A. Control Panel on
Mounting Stand
When the Control Panel mounting
stand is used, either cast four
1
⁄
2
”
anchor bolts into the concrete
cover, or drill holes for expansion
lag screws and attach stand
(bolts or lag screws furnished by
others). Insert power and sensor
cords from the pumps and all
float cords through the bushing in
the sump cover. Bolt the panel to
the panel stand. (Nuts, bolts, and
washers are not supplied.) Make
connections between the bottom
of the control panel and the basin
cover using flexible conduit and
conduit seals (by others). When
installing pump power cords,
make certain that the cords do not
rub against the pump or bottom of
the basin. Shorten cords to suit the
installation. See Bulletin Q-701
for the Installation and Service
Manual on the electrical Control
Panel system.
11B. Control Panel Mounted
Remote from Basin
If the Control Panel is remotely
located, instead of on the mounting
stand at the basin, install coupling
through basin wall. Screw
protective bushing from inside
basin into coupling (all furnished
by others). Make connections
outside station using wiring,
conduit seals (potted) and conduit
to remotely located Control Panel
(conduit and seals not furnished).
Insert the power and sensor cords
through the coupling provided
with bushing. Grout in coupling
going through sump wall (by
others). When installing pump
power cords make certain that
cords do not rub against pump
or on bottom of basin. Shorten
cords to suit the installation.
See Bulletin Q-701 for the
Installation and Service Manual
on the electrical Control Panel
system.
Electrical Connection:
Make all connections in compliance
with N.E.C. and/or local codes.
Connect the control panel ground
wire to a good ground. Ground
wire must be grounded properly
per N.E.C. and/or local codes. All
electrical connections are to be
made by a qualified electrician.
Pump
Operations
WARNING: Before handling
these pumps and controls,
always disconnect the power
first. Do not smoke or use
sparkable electrical devices or
flames in a septic (gaseous) or
possible septic basin.
See Pump Installation and Service
Manual for submersible pump
operation on starting system.
Clean all trash and sticks from
basin and connect pump to piping.
Pump
Maintenance
Removing Pump from Basin for
Servicing:
WARNING: Before handling
these pumps and controls,
always disconnect the power
first. Do not smoke or use
sparkable electrical devices or
flames in a septic (gaseous) or
possible septic basin.
To remove a pump from a
standard installation (control
panel mounted on basin cover),
the power to the control panel is
first turned off. Close the plug
valve. Disconnect the power cords
and sensor cords in the control
panel from their terminals. Lift
out the pump from the basin
by means of the chain or cable.
Summary of Contents for PULTRUDED RAIL SYSTEM
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