Gorman-Rupp Pumps 3D-B 883512 and up - Manual (Page 12)

D SERIES OM−01490
PAGE B − 5 INSTALLATION
mended that unless absolutely necessary,
no positive shut-off valve be installed in the
suction line; excessive restriction will
cause incomplete filling of the diaphragm
chamber and result in shortened dia-
phragm life.
ALIGNMENT
Before attempting to open or service the
pump:
1. Familiarize yourself with this man-
ual.
2. Shut off incoming power to the mo-
tor and lock it out to ensure that the
pump will remain inoperative.
3. Allow the pump to completely cool
if overheated.
4. Close the discharge valve (if
used).
5. Drain the pump.
It is imperative that alignment be checked
before the pump is operated.
The pump and gearbox were aligned and secured
at the factory, but fastening hardware may have
loosened during shipment. It is imperative that this
hardware and the alignment be checked after the
pump is installed and before operation. Adjust-
ments may be made by loosening the securing
hardware and shifting or shimming components
as required.
This pump is designed to be driven by a flex-
coupled electric motor.
To check coupling alignment, use a feeler gauge or
taper gauge between the coupling halves every
90
_. The coupling is in alignment when the hubs
are the same distance apart at all points.
To check parallel adjustment, lay a straightedge
across both coupling halves at the top, bottom and
sides. The horizontal parallel adjustment is correct
when the straightedge rests evenly on both halves
of the coupling at all points. Use a feeler gauge be-
tween the coupling to measure any misalignment.
Do not operate the pump without the ec-
centric and coupling guards in place
over the rotating parts. Exposed rotat-
ing parts can catch clothing, fingers, or
tools, causing severe injury to person-
nel.
ELECTRICAL CONNECTIONS
Before connecting the motor to the incoming pow-
er, check that the electrical service available
matches the pump motor requirements stamped
on the motor nameplate.
The pump must be operated in the direc-
tion indicated by the arrow on the gearbox
and on the accompanying decals. Reverse
rotation could cause pump components to
be destroyed.
Install and operate only an explosion
proof motor in an explosive atmo-
sphere. Install, connect, and operate
the motor in accordance with the Na-
tional Electric Code and all local codes.
If there is a conflict between the instruc-
tions in the manual accompanying the
unit and the National Electric Code or
the applicable local code, the National
or local code shall take precedence.