Orion KRF110, Инструкция по эксплуатации, Страница: 14 / 36

12
Preparation and Confirmation
Piping / Electrical Wiring
4.If reverse rotation is caused by residual pressure upon stopping the
pump, blade damage is likely to be incurred. Please install a check
valve within 50 cm from the pump's inlet port (or exhaust port) to
prevent this from happening. In installing a check valve, install it
levelly to the floor. Negligence may cause pulsation or abnormal
noises.
(Figure 2)
(Recommended check valve: manufacturer's product name: JIS
compliant KITZ bronze swing check valve)
5.Do not apply a sealing tape when connecting pipes. Pieces of torn
sealing tape may cause controller malfunction or abnormal operation sound.
6.Do not overtighten pipes. Overtightening pipes may damage the SD case.
Electrical Wiring
Warning
●
Contact with a specialized company to install an earth leakage breaker.
Failure to do so may cause
electric shock or fire.
Also, install an overload protection device (thermal relay).
Failure to do
so may cause failure to the product due to overload or fire.
1.Install the earth leakage breaker.
Set the breaking capacity to 1.5 times the current value shown on the motor name plate as a rough
guiding value. Select a sensed current of 30mA.
※
Consult with a specialized company for electrical installation.
2.Be sure to install the grounding.
・
Location of grounding screws:
The grounding is attached on the terminal box.
(You can find the mark "E" or mark " " near the screw.)
・
Select a copper wire, with a nominal cross section bigger than the cross section shown in the
example, as grounding wire.
Motor rated output (kW) Nominal cross section
（
mm
2 ）
2.2 2
3.7 3.5
・
When the grounding screw becomes loose due to vibration during operation, sparks will occur at the
grounding section. Wire the grounding cable so that the grounding screw does not loose due to
vibration during operation, and tighten the screw with locking.
3.Install the overload protection device (e.g. thermal relay). Make the V specification 100%, and
B and VB specifications 110% against the rated current value written on the motor name plate
for the set value.
4.Operate the pump with the rated power supply written on the motor name plate.
5. A special characteristic of the dry pump is that during initial operation, the rated current value
may be exceeded at the start, but will drop over time.(Note that depending on the specifications
and/or operating conditions, there are cases it may not drop to the rated current value or
below.) Consult with your dealer if the overload protector (thermal relay) activates during initial
operation or during normal operation.
6.Select a power cord referring to the current value shown on the pump name plate.
7.Be sure to keep the power supply cable with holding assembly in order not to get stressed to
the internal power supply connection terminal at the time of pulling the cable.
(Recommended holding assembly: Maker; UI Lapp GMBH/ Product name: Skintop/ Model: ST-M,
STR-M)
(Figure 2)
Example of check
valve installation
Check valve