Installation instructions

GEI-M1011A
(Delta) Low Voltage
Y (Star) High Voltage
Figure 2 – Terminal Board Connections
Squirrel Cage Motor With One Speed
Before starting the motor, make sure that all safety
regulations are strictly met. This is also important for
motor service and for disconnection. When the motor is
put into service, check operating current against nameplate
current.
CAUTION: Do not exceed the value
of nameplate current multiplied by
the motor service factor.
The motor frame may be grounded by attaching a
ground strap from a known ground point to the bronze
grounding bolt in the conduit box or on the motor frame.
2. Allowable Voltage and Frequency
The power supply must agree with the motor nameplate
voltage and frequency. Motors will operate (but with
characteristics somewhat different from nameplate values)
on line voltages within
±10% of nameplate value or
frequency within
±5%, and a combined variation not to
exceed
±10%.
3. Position of the Conduit Box
When mounting conditions permit, the conduit box may be
turned so that entrance can be made upward, downward, or
from either side.
F. Lubrication
Motors with oil lubricated bearings (324-5011 frames) are
shipped without oil. Before starting the motor, fill each
reservoir to the standstill level shown on the sight gage. Be
careful to keep dirt out of the lubricant and bearing
housing.
Use only the oil specified on the lubrication nameplate or
the lubrication instruction supplied with each motor. See
Relubrication, Table 2 and Lube Nameplate for oil grade
and viscosity and further instructions.
If reservoirs have had oil in them during storage period,
drain out this old oil and refill reservoir with fresh oil when
installing the motor for operation.
G. Water Cooling
If a bearing requires auxiliary water cooling, the oil
reservoir will be provided with a cooling coil whose ends
are brought out to fittings in the end shield wall (see
Figure 10).
The lubrication nameplate or instructions will specify the
required water flow and the maximum water flow in
gallons per minute. Exceeding this maximum flow could
cause deterioration of the cooling coil.
Whenever the motor is running, enough water should be
circulated through the coil to keep the steady oil-bath
temperature below 65
°C (150°F).
The maximum pressure and maximum temperature
allowable for the cooling water are also shown on the
nameplate or instructions. Exceeding these values may
damage the coil or give insufficient cooling of the
lubricating oil. Use only pure, clean water unless the
motor was specifically ordered to have a coil and fittings of
special material to withstand corrosive water. Standard
cooling coils are made from type “K” copper tubing with
wall thickness of 1.25 mm (0.050 in.). When the motor is
shut down during freezing weather, blow any remaining
water out of the coil.
Oil Cooling Coil Connections
As indicated above, a cooling coil is used to keep oil in the
bearing reservoir cool. Water at pressures as high as 700
kPa (100 PSI) is circulated through the coil. It is
imperative, therefore, that all joints be tight and that there
be no leaks. A pinhole leak will quickly allow water to get
into the oil to cause oil and water to overflow into interior
of motor and cause motor failure.
See Figure 3 and the following paragraphs for further
instructions. Also see Maintenance Instructions.
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