Pentair Myers 4MSW Serie Manual De Instalación Y Operación página 3

INSTALLATION
Pump Mount
Install the pump as a free standing unit or with a guide rail
lift-out system. See Page 6 for lift-out system details.
Free-Standing Unit: Install optional Free Stand Adapter
Assembly. Set pump on floor of open top basin. Install a pipe
union in discharge piping to allow removal for servicing.
Electrical
Install the pump in accordance with all applicable electrical
codes. Install a fused disconnect switch or circuit breaker in
accordance with local codes.
The pump has two cables extending out of the top of the
pump. The larger cable is the power cable; the smaller cable
is the control cable.
Power Circuits
Match the pump to the power circuit. See pump nameplate
or the "Motor Specifications" chart for information on the
electrical power supply required. Use a control panel or
motor starter sized to meet the requirements of the pump.
See Figures 1 and 2, Page 2, for electrical wiring diagrams.
When choosing motor starters, use magnetic motor starters
equipped with overload protection. Single phase units
require one line protection; three phase units require three
line protection. Equip the overload relays with ambient com-
pensated heaters for proper protection. Mount the controls in
an enclosure approved for the particular installation
involved.
Pilot devices such as float switches or other liquid level
sensing devices may be used to control the motor starter.
Control Circuits
The white and black wires in the control cable are connected
in series with the on-winding thermostats in the motor; wire
them in series with the motor starter coil.
NOTICE: This circuit protects the motor only against long
term overload. For short term protection, adequate circuit
breakers or fuses must be included in the system.
The red and green wires in the control cable form the leak
indicator circuit. The green wire is connected to the pump
case. Connect it to ground or neutral side of the indicating
circuit.The red wire is connected to the leak detection probe
in pump. Connect it to the hot side of the leak detection cir-
cuit. In normal operation, the probe and pump case function
as a normally open switch.The presence of water in the
pump will complete the probe circuit, causing the light on
the control panel to come on.
Table I: Winding Resistance in Ohms
Model No.* Volts/Hz/Ph
4MSW300MC2 208-230/60/1
4MSW300MC3 208-230/60/1
4MSW500MC2 208-230/60/3
4MSW500MC3 208-230/460/60/3
4MSWH750MC3 208-230/460/60/3
4MSWH1000MC3 208-230/460/60/3
4MSWH1200MC3 208-230/460/60/3
6MSW750MC3 208-230/460/60/3
6MSW1000MC3 208-230/460/60/3
6MSW1200MC3 208-230/460/60/3
* Manual operation. Control panel required.
Table II: Full Load Motor Current in Amps
* Manual operation. Control panel required.
DISASSEMBLY
trol the pump during repair. Be prepared to deal with a
large quantity of oil when disassembling pump. Inspect
O-Rings and castings for damage or evidence of leaks;
check for pinched or damaged wires.
1. Hoist the pump out of the pit.
2. With an ohmmeter, check the motor electrically for short
3. Remove the six bolts holding the volute to the seal plate
Figure 3
4. Lay the pump on its side, remove the seal plate plug
5. Remove the impeller bolt, retainer, impeller, key, and
B-W B-R R-W
0.4 1.5 1.9
0.4 1.5 1.9
0.78 0.78 0.78
3.12 3.12 3.12
0.41 0.41 0.41
0.41 0.41 0.41
1.64 1.64 1.64
0.41 0.41 0.41
0.41 0.41 0.41
Figure 5
1.64 1.64 1.64
3
Three Phase
Model No.* 208V
4MSW300M2 19.4
4MSW300M3 19.4
4MSW500M2 14.0
4MSW500M3 14.0
4MSWH750M3 40.0
4MSWH1000M3 37.6
4MSWH1200M3 33.2
6MSW750M3 40.0
6MSW1000M3 35.4
6MSW1200M3 30.0
Heavy parts. Use the hoist to lift and con-
circuits and open circuits.
and remove the volute (Figure 3). Tap around the parting
line with a lead hammer or rawhide mallet to loosen the
volute.
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Figure 4
and drain seal plate (Figure 4). Check for water in the
seal plate oil.
impeller shims (Figure 5).
NOTICE: Heat the impeller bolt slightly to loosen the loc-
tite.
Single Phase
230V 460V 230V
17.5 8.3 27.0
17.5 8.3 27.0
12.6 6.3 20.0
12.6 6.3 20.0
37.0 18.5 –
34.0 17.0 –
30.0 15.0 –
36.0 18.0 –
32.0 16.0 –
28.0 14.0 –
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