CRANE PUMPS & SYSTEMS DEMING 7365 Series, Инструкция по установке и эксплуатации

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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 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.
Insert the friction rings and gromets 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 Figure 2).
CORD CLAMPING PLATE SHOULD BE DRAWN METAL
TO METAL (35 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.
NOTE: The White Wire Is Not A Neutral Or Ground Lead.
The Black, White And Red Leads Are Power Carrying
Conductors. The Green Lead Is For Connection To
Ground.
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 2