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Level Sensing Controls: The float level controls
maintain the basin sewage water level by controlling
pump turn-on and turn-off levels.
1. The lower turn-off control should be set so that the
pump stops at approximately the top of the pump.
Consult the factory for any settings below this
point.
2. The upper turn-on control should be set above the
lower turn-off control. The exact height between
the two controls is determined by the number
of pump starts desired and depth of the basin.
A maximum of 10 starts per hour should not be
exceeded.
3. The override control is set at a specified height
above the upper turn-on control.
4. The alarm control is set about 6" to 12" above the
override control.
5. No control should be set above the inlet invert.
CAUTION: Never enter pump chamber after
sewage or effluent has been in basin. Sewage
water can give off methane, hydrogen sulfide
and other gases that are highly poisonous. Myers
recommends using the rail lift-out system so that
no service is required inside the basin.
INSTALLING RAIL SYSTEM PARTS
Mounting Cover, Discharge Base and Rails
1. Set concrete cover with hatch opening in position.
2. Bolt top rail support plates to hatch frame. Two
1/4" bolts are required to attach each support.
3. Lower the base elbow into the basin.
4. Position the base elbow by dropping a plumb
line from center of pipe supports, located on
top rail support, to center of rail pins protruding
from the base elbow. Level the elbow flange in
two directions 90° to each other. Shims may be
required under the base in order to obtain this level
condition. Mark the position of the base hold-down
bolts through the holes in the base.
5. Move the base aside to allow drilling of the
concrete for 3/8" expansion bolts, 2" long. Move
the base over the bolt holes and recheck with level
and plumb line. Install expansion bolts.
6. Cut the pipe guide rails to the proper length and
install them between the pipe supports at the top
of the basin and the pins on the base. Guide rails
are to be Schedule 10 or Schedule 40, galvanized
or stainless steel.
7. Install discharge pipe as required by the particular
job specifications.
IMPORTANT: DISCHARGE PIPE AND GUIDE RAILS
MUST BE PARALLEL IF INTERMEDIATE GUIDE
BRACKET IS USED.
INSTALLING INTERMEDIATE
GUIDE BRACKET
(Required for each 20 feet of basin depth)
1. Remove guide rails and cut a piece from each
one. These pipes must be exactly the same length
and of a length that will permit installing the
intermediate guide bracket in the desired location.
2. Place the cut pieces of pipe over the guide rail pins
located in the base.
3. Set the intermediate guide bracket in position with
guides into pipe. Put U-bolt around discharge pipe
and tighten lightly.
4. Measure from joint on plug on intermediate guide
bracket to joint on plug on top rail support and
cut two rails to this length. Put rails in place and
tighten screws in top rail support.
5. Recheck rails; they must be straight and plumb.
Move intermediate guide bracket if necessary to
perfectly align rails. After alignment is secured,
tighten nuts on U-bolt.
6. If a second intermediate guide bracket is used, the
above procedure is followed for installation.
ATTACHING DISCONNECT TO PUMP
1. Bolt elbow onto pump volute at flange vise with
two 5/16-18UNC socket head cap screws.
2. Set lifting chain bail with one end on guide plate
eye bolt and other end on pump lifting eye.
INSTALLING PUMP AND DISCONNECT
1. Attach the lifting chain to the bail with clevis,
sliding the clevis along bail until the center of
gravity is found.
2. A hook is located on the top rail support to hold
the upper end of the chain when not in use.
3. Position pump so the guide rails are located in the
slots of the guide plate. Slowly lower the pump
down the guide rails to the base. The locating pins
(horizontal pins on sealing plate) should come to
seat in the inclined surface on the arms.
CAUTION: No persons should be in the sump basin
when pump is lowered into position!
Air Venting: Air tends to trap in the pump volute when
water rises in the sump or when the pump is lowered
into water after service. To vent off this air, a small
hole is drilled into the pump volute. Be sure this vent
hole is clean after any service work on pump.
3
M-03-305 11/13/12
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