Dometic PM Series Montagehandleiding En Gebruiksaanwijzing pagina 6
Magnetische aandrijving centrifugaalpomp
Beschikbare talen
Beschikbare talen
EN
① Vertical discharge
1. Remove the four clamp ring bolts, lock washers, and flat washers.
2. Rotate the clamp ring 90 ° , aligning the holes on the clamp ring and motor
adapter/barrier.
3. Reinstall the clamp ring bolts, lock washers, and flat washers.
8.4
Mounting the pump
Securely mount the pump in the desired location (P030 shown):
① Sealant
② Motor
1. Place the pump motor in the desired location and mark the position of the mounting
holes.
2. Drill holes for the mounting screws.
3. If the pump was packaged with plastic shipping shims, place the shims under the
motor feet.
4. Tighten the screws to secure the pump into position.
5. Use an appropriate pipe sealant or tape on the threads and other piping
connections.
6. Tighten all connections, using appropriate tools for the selected piping materials.
8.5
Connecting the piping
To prevent strain on the pump casing, give the piping near the pump independent
support.
To prevent debris entering the pump along with the liquid, use a strainer on the inlet
pipe.
To minimize pipe friction, position the piping on the suction side of the pump in a
straight and short configuration.
Keep bends and valves at least ten pipe diameters away from the suction and
discharge.
Install the suction piping leveled or sloping slightly upward toward the pump.
To prevent air pockets, make sure the suction line does not have any high spots.
Make sure the suction line is at least as large as the suction inlet port or one pipe size
larger so that it does not affect the NPSHa.
Do not reduce the suction line size.
Make sure a check valve and control valve (if used) is installed on the discharge line.
The check valve helps prevent the pump from water hammer damage, while the
control valve regulates the flow.
To make the pump accessible for maintenance, use isolation valves on the suction
and discharge lines.
If flexible hose is preferred, use a reinforced hose rated for the proper temperature,
pressure, and chemical resistance for the fluid being pumped.
Use an appropriate pipe sealant or tape on the threads and other piping connections.
6
② Horizontal discharge
③ Foot
④ Pump head
To avoid restricting the suction flow, make sure the suction valve is completely open.
Install a flush system in the piping so that the pump can be flushed before being
removed for service.
NOTE P062, P075, P100, P137, P150, and P200 pump models are
provided with a provision for a customer-installed 0.25 in (6.35 mm)
drain in the impeller housing. For the best performance, ensure the pump
piping is sized appropriately for the flow rate.
8.6
Connecting a drain plug or valve (optional)
NOTICE! Damage hazard
Do not over-tighten the drain plug or valve during installation.
P062, P075, P137, P150, P200 only: A drain plug or valve is installed in the impeller
housing for removing fluids before performing maintenance on the pump.
To connect an optional drain plug or valve:
1. Clamp the impeller housing to a drill press table.
2. Use a 0.44 in (11.10 mm) drill and the molded boss as a guide.
3. Drill completely through the molded boss into the interior of the impeller housing.
4. Use a 0.25 in (6.35 mm) NPT tap.
5. Tap the hole in the molded boss to an appropriate depth.
NOTE Do not tap too deep.
8.7
Making the electrical connections
WARNING! Electrocution hazard
The installation may only be carried out by a qualified electrician.
NOTICE! Damage hazard
Refer to the wiring diagram on the pump for the correct electrical
connections.
Before connecting to the power line, check the data plate voltage, rotation
connection, and ensure proper grounding.
Ensure that the pump voltage, frequency, and phase 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.
Use a use or circuit breaker to protect the motor.
Use a phase failure protection device to protect three-phase motors.
For dual-voltage pumps, wire the pump to the specific voltage for application.
Ensure that the power monitors or variable frequency drives are properly installed
according to the manufacturer's instructions.
9 Using the pump
NOTICE! Damage hazard
Before operation, fill the pump with liquid for priming
Follow the steps for priming and starting the pump, verifying the motor
rotation, and shutting down the pump.
Always give adequate NPSHa (net positive suction head available).
Dometic recommends the pump be given at least 24 in (60.96 cm) above
the NPSHr (net positive suction head required).
Consider factors such as filters, strainers and any other fittings in the suction
line when calculating the NPSHa and NPSHr.
NPSHa is the pressure measured to the inlet of the pump. NPSHr is a value that can be
found on the pump spec sheet curves.
