Crane BARNES 3XSHM, Инструкция по установке и эксплуатации

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5
B-3) Liquid Level Controls:
It is recommended to use a liquid level control system
that allows the on and off point to be separated by at least
twelve inches. An additional set point (lag point) should
be incorporated with an alternator switching system for
a duplex (two pump) station. A high level alarm may be
required to alert maintenance personnel that there is a
high water situation in the wet well should the output of the
pump station drop below the inflow rate. A low level cut off
may be installed to provide system shutdown if the main
level control system malfunctions. The off point should be
positioned so that the liquid level never drops below the
minimum continuous duty point for the pump shown in
figure 1.
B-4.1) Electrical Connections:
WARNING! - All model pumps and
control panels must be properly
grounded per the NATIONAL
ELECTRIC CODE or CANADIAN
ELECTRIC CODE, State, Province
and local codes. Improper
grounding voids warranty.
B-4) Power/Control Cord:
The power/control cord used with pump has a patented
“quick disconnect” feature that allows the cord to be easily
attached and disconnected at the pump. The maximum
amperage rating for the cord is cast in the top of the cast
stainless mounting plate. The voltage connection for the
motor is determined by the cord assembly used. Low
voltage cords (208 & 230 Volt) utilize a molded quick
connect plug that is colored black. High voltage cords
(460 & 575 Volt) utilize a molded quick connect cord
that is colored orange. It is important to verify that the
cord being used is rated for the nameplate voltage
and amperage rating shown on the pump nameplate.
Refer to Chart on page 7. No internal wiring adjustments
are necessary for dual and tri-voltage pumps. All jumper
connections to set the proper voltage are made by the cord
plug itself.
A flat alignment mark is molded into the plug and mating
socket on the pump. These should be used as a visual
indication as to the correct orientation of the plug. Insert the
plug into the pump and install the two 12 mm socket head
cap screws into the clamping plate. Slowly tighten the two
screws alternating back and forth until the clamping plate is
drawn down flush to the top of the cord boss on the pump.
The two screws should be torqued until the plate is down to
a point where metal to metal contact is made between the
stainless steel plate and pump housing. (See Fig. 2)
The cord assembly mounted to the pump must not be
modified in any way except for shortening to a specific
application. Any splice between the pump and the control
panel must be made in accordance with all applicable
electric codes. It is recommended that a junction box (if
used) be mounted outside the sump or be of at least Nema
6 or 6P construction with NEMA 6 or 6P watertight cord
grips if located within the wet well. A water and vapor tight
seal fitting MUST be used in conduit leaving the wet well
to prevent moisture and gases from reaching the control
panel. Prior to installation, the pump power cable should be
inspected for nicks or damage. If damaged, the cord should
be replaced before installation.
CORD CLAMPING PLATE SHOULD BE DRAWN METAL
TO METAL (50 FT/LBS BOLT TORQUE). IF A GAP
EXISTS CONTINUE TO TIGHTEN BOLTS. DO NOT USE
ANY TYPE OF SEALANT OR GREASE ON THE CORD
ENTRY.
DO NOT USE THE POWER CORD TO LIFT PUMP.
B-4.1) Electrical Connections:
When the electrical connections are made, the lead wires
from the power cable should be stripped so that the ground
wire is at least two inches longer than the power leads.
This will ensure that if the cable is inadvertently pulled out
of the connection point, the ground wire will be the last lead
to break the circuit.
B-4.2) Wire Size:
If additional cable is required consult a qualified electrician
for proper wire size. Voltage drop due to wire resistance
between the pump and power connection point should be
limited to 3% when additional cable is added.
WARRANTY NOTE:
Both the temperature sensor and moisture
detection system must be connected to the
motor circuitry such that the motor will be de-
energized or sound alarm if excessive motor
temperatures are reached and/or if water is
detected in the seal chamber and/or motor
chamber. Failure to have the above mentioned
systems installed and operative, nullifies
warranty.
FIGURE 2b FIGURE 2a