21
9
Wiring
Electrical connections
WARNING
The electrical connection should be carried out by an authorized electrician in accordance with
local regulations. Please make sure that the electrical data on the nameplate of the motor
corresponds to the electrical supply on which it will be used. Motors must be connected to a
motor protection switch.
1.
Use an electromagnetic switch that conforms to the specifications (voltage, capacity, etc.) of the
pump motor.
2.
If using the pump outdoors, waterproof the wiring to protect the switches from rainwater.
3.
Electromagnetic switches and push buttons should be installed at a reasonable distance from the
pump.
10 Operating Instructions
1.
Never operate the pump with the suction and discharge side valve closed. Otherwise, the inside
of the pump or the piping will be damaged.
2.
In the event of a service power failure, turn off the power switch immediately and close the
discharge valve.
3. Maximum pump surface temperature (not motor)
The max. pump surface temperature of each model is shown in the table. Arrange protective
measures in accordance with the temperature levels.
Model
Liquid
temp °C
Max. surface temp. at
40°C ambient temp °C
LKN32, 45,47,55,57 VC, VH, VS
50
45
LKN32, 45,47,55,57, S6
80
75
4. Sound generated by pump
The level of sound generated by LKN type of pump is 85 (dB). Arrange a muffling device to
reduce the sound level if necessary. The procedure for sound measurement conforms to the EN
31201 (ISO11201).
