Connecting A Drain Plug Or Valve (Optional); Making The Electrical Connections; Operation; Priming The Pump - Dometic P062 Installation And Operation Manual

Magnetic-Drive Centrifugal Pump
5 .5 Connecting a Drain Plug or Valve
(Optional)
A drain plug or valve can be installed in the impeller
housing to provide the ability to connect a drain line
for removing fluids before servicing the pump. The
following instructions explain how to connect an
optional drain plug or valve on the P062, P075, P137,
P150, and P200 models.
1. Clamp the impeller housing to a drill press table.
2. Using a 7/16 in. drill and the molded boss as a guide,
drill completely through the molded boss into the
interior of the impeller housing.
3. Using a 1/4 in. NPT tap, tap the hole in the molded
boss to the appropriate depth.
I Do not tap too deep or the impeller housing may
be damaged.
4. Install the drain plug or valve, being careful not to
over-tighten.
5 .6 Making the Electrical
Connections
NOTICE: When installing the pump, follow these
important considerations regarding the electrical
connections. Failure to follow the practices listed could
result in damage to the pump.
• Prior to connecting to the power line, check the
nameplate voltage and rotation connection, and
ensure proper grounding.
• Check the pump voltage, frequency, and phase to
ensure it matches the installation power source.
• Do not use or install the pump if the voltage,
frequency, phase, and amp on the label are different
from the supply circuit.
• Protect the motor with a fuse or circuit breaker. For
three-phase motors, protect the motor with a phase-
failure protection device.
• Some pumps are dual-voltage and will need to be
wired to the specific voltage for your application.
EN
• If utilized, verify that power monitors or variable
frequency drives have been properly installed
according to the manufacturer's instructions.
• Follow National Electric Code, NEMA MG-2, IEC,
and ABYC standards, requirements, and local
electrical codes.
I Refer to the wiring diagram affixed to the pump.

6 Operation

NOTICE: This pump must be filled with liquid. Failure
to prime the pump before operation could result in
damage to the pump and components.
Follow the steps in this section for priming and starting
the pump, verifying the motor rotation, and shutting
down the pump.

6 .1 Priming the Pump

I This pump is not self priming. Mounting the pump
below the water line helps prime the pump head.
1. Connect the external liquid source to the pump.
2. Open the inlet (suction) and discharge valves
completely and allow the pump to fill with liquid.

6 .2 Starting the Pump

1. Ensure all valves are open and the pump connections
are secure. The pump requires positive suction at the
pump head to prevent cavitation.
2. Close the discharge valve.
3. Turn the pump on.
4. Slowly open the discharge valve. Adjust the flow rate
and pressure by regulating the discharge valve.
I Do not attempt to adjust the flow with the suction
valve.
Operation
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