Schreiber Chillers MC75AC - Manual (Page 11)

American Stainless Pumps
Stainless Steel Pumps for the Commercial Marketplace
www.aspumps.com 14032 S. Avalon Blvd. Los Angeles, CA 90061
Phone: (310) 630-8089 Fax: (310) 630-8095
Page 2
Installation:
Units may be installed horizontally, at an angle or vertically with the motor on top. Do not mount the motor below
the pump as leakage from the pump will damage the motor and can cause a shock, burns or
death.
Locate the pump as near to the liquid source as possible. The pump must be primed with little or no air in the case
to begin operation. The pump must be located below the liquid level when starting. This pump is not self-priming.
Protect the pump and motor from freezing. Although the pump may survive a freeze up, the mechanical seal and
O-Rings may not.
Allow adequate space around the unit for service and ventilation.
Units mounted horizontally should be located on a flat, rigid surface. Unit may be free standing, but some vibrations
may occur. If attached to a foundation, tighten hold down bolts before connecting the piping.
Piping:
All piping must be independently supported. No piping loads may be carried by the pump.
Piping should be the same size or larger than the pump connections.
Proper Piping to the suction is critical for proper pump operation. Suction pipe should be short and direct, with a
minimum of fittings and turns.
Suction pipe must continuously rise to the pump to avoid air pockets. All pipe connections must be airtight.
If suction pipe is larger than the pump, an eccentric reducer must be used with the straight side on top to avoid
an air pocket.
If suction of pump is above the liquid source level, a foot valve or other isolation valve will be needed to prime the
pump. A continuous stream of liquid must be made available for the pump suction to hold its prime.
Do not use any suction valve for throttling the pump. This will cause loss of prime and damage to the pump that
is not covered by warranty.
Be sure that the source liquid level is sufficient to prevent vortices from drawing air into the pump.
Install a valve on the discharge line for use in regulating the pump flow and for isolating the pump during
maintenance and inspection.
Rotation:
The models SSP & SSPC will operate properly only in one direction (clockwise when looking from the motor end,
counterclockwise when viewed from the pump end).
Operating the pump in the reverse rotation may
cause the impeller to unscrew, breaking the shaft, damaging the pump and/or the motor,
and voids the warranty.
Three phase motors can rotate in either direction. Single phase motors normally only
rotate in the proper direction.
To check rotation, you must observe the motor shaft from the back of the motor.
1. Remove the end cover from the center of the back of the motor by prying off the cap. You do not need to
remove any screws on most motors.
2. Quickly switch on and off the motor and watch the shaft rotation as it slows down. Motor shaft should be
turning in the clockwise direction when viewed from the back of the motor.
3. If your three-phase motor is turning in the wrong direction, have a qualified electrician interchange
two of the three motor power wires . This should reverse the rotation. If a single-phase motor is
turning in the wrong direction, it has been wired wrong internally. Consult the motor manufacturer or
American Stainless Pumps for instructions.
4. Check the rotation again, if it is correct, replace the end cover cap.
Operation:
Pump must be completely primed before starting. Air in the suction lines or case must be vented.
Model SSPC Only: If the pump case is rotated so that the discharge nozzle is not vertical, an air pocket may form
in the case that will prevent the pump from operating properly. Loosen the case bolts until this air is removed for
proper operation. Be sure to retighten the bolts before operating the pump.
Do not operate the pump at or near zero flow. At zero flow, heat will build up in the pump and can cause
extreme damage to the pump, property damage and/or possible injury to operating personal. Minimum flows of
10% of the pumps best efficiency point are recommended unless otherwise authorized by ASP.
Do not operate the pump beyond the flow rates shown on published curves. Noisy pumps or the sounds of
“pumping rocks” may be signs of cavitation or operation beyond the pumps capacity.