Grundfos EB 20501-5, Owner'S Manual Installation And Operating Instructions

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Eng
lish (US)
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2. Installation - mechanical
All installations should be performed by personnel experienced
with the placement, connection, and alignment of pumping
equipment. The following instructions are general in nature, and
may not deal with the specifics of your installation. Read these
instructions thoroughly before installing and operating your
Grundfos type EB centrifugal pump. Keep these instructions
handy for future use.
2.1 Pump identification
All Grundfos Pumps are identified by Catalog and Serial
Numbers. These are stamped on the pump nameplate Fig. 1
affixed to each pump casing and should be referred to in all
correspondence with the Company.
Fig. 1 Nameplate
2.2 Receiving
Check pumping unit for shortages and damages immediately
upon arrival. Pump accessories, when required, are packaged in
a separate container and shipped with the unit. If equipment is
damaged in transit, immediately report the damage to the truck
line’s agent. Make a complete report on the freight bill to speed
satisfactory adjustment by the carrier. Unload and handle the
equipment with a sling or tow motor.
2.3 Temporary storage
If pump is not to be installed and operated soon after arrival, store
it in a clean, dry area of moderate ambient temperature. Rotate
the shaft by hand periodically to coat bearing with lubricant to
retard oxidation and corrosion. Follow motor manufacturer’s
storage recommendations where applicable.
2.4 Location
Locate the pump as close to the suction supply as possible. Use
the shortest and most direct suction piping practical. Locate the
pump below system level wherever possible. This will facilitate
priming, assure a steady liquid flow, and provide a positive
suction head. Make sure sufficient NPSH (Net Positive Suction
Head) is provided at the suction end by considering the pump’s
location in relation to the entire system. Available NPSH must
always equal or exceed required NPSH specified on the pump
performance curve. Always allow sufficient accessibility for
maintenance and inspection. Provide a clear space with ample
head room for use of a hoist strong enough to lift the unit. Make
sure a suitable power source is available for the pump motor.
Electrical characteristics should match those specified on the
motor data plate, within the limits covered in Sections 3 and 4.
Avoid pump exposure to sub-zero temperatures to prevent pump
liquid from freezing. If freezing conditions exist during shutdown
periods, see Sections 4.5 and 4.6 for specific recommendations.
2.5 Vertical mounting instructions
The Endgun booster is designed to be mounted vertically on a
2 ½ ” NPT nipple. It may also be mounted with a nipple and
companion flange on both the pump and the pivot. The majority of
installations are threaded straight onto the nipple where the
suction must be the same size (no decrease in pipe size at
suction allowed). Discharge pipe size will be the same at the
pump or may be one or two sizes larger depending on the length.
Our pump unit is equipped of a wash down duty motor and may
be used in a variety of outdoor applications.
2.6 Mechanical seals
All Grundfos Type EB pumps that are equipped with mechanical
seals are matched to the conditions for which the pump was sold.
Observe the following precautions to avoid seal damage and
obtain maximum seal life. Do not exceed temperature or pressure
limitations for the mechanical seal used. Do not run the pump dry
or against a closed valve! Dry operation will cause seal failure
within minutes. Purge all air from the seal chambers and
recirculation lines prior to operating the pump. Clean and purge
suction piping in new installations before installing and operating
pump. Pipe scale, welding slag and other abrasives can cause
rapid seal failure.
3. Installation-electrical
3.1 Motors general
The motor control circuit must have the following components in
order to comply with the National Electrical Code.
• Motor Disconnecting Device: A motor disconnecting device
must be installed that is capable of disconnecting both the
controller (motor starter) and the motor from their source of
power.
• The disconnecting device must be located so that the
controller (motor starter) can be seen from the disconnecting
means. In all cases, the distance from the disconnecting
device to the controller must be less than 50'.
• In most installations the disconnecting device will be a circuit
breaker or fusible disconnect switch.
• Motor short circuit and ground fault protection: Short circuit
and ground fault protection are usually provided by means of a
circuit breaker or fusible disconnect switch. The selection of
the size of the circuit breaker or fuse must be in accordance
with Section 430-52 and Table 430-152 of the National
Electrical Code.
• Motor controller with running over current protection (magnetic
starter): These components must be installed in accordance
with applicable local and state electrical codes in addition to
the National Electrical Code.
3.2 Installation wiring
Mount the control panel or motor starter(s) in close proximity to
the pump to provide convenient control and ease of installation.
Wire panel or starter(s) to motor(s) and pilot device(s): Wires to
each motor must be sized for at least 125% of the motor
nameplate full load amps. AWG #16 Type THW stranded wire is
recommended for wiring of pilot devices (float switches). Check
incoming power source to ensure that it is the same as the
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Warning
Whenever powered equipment is being used in
explosive surroundings, the rules and
regulations generally or specifically imposed by
the relevant responsible authorities or trade
organizations must be observed.