4-4
4.3.2 Instrumentation
Carry out wiring work for instrumentation according to the following procedure:
Connect all the wires for instrumentation (hereafter “the instrumentation wires”) to the terminal block on the
control board.
For the models with a motor output of up to 3.7kW, observe the following instructions on connecting the
wires to the control board.
c
Use highly flexible electric wires for instrumentation.
d
Insert the instrumentation wires into the inlet ports for instrumentation wires, pass them through either
side of the cover, and then connect them to the board.
The inlet ports for instrumentation wires are knockout openings.
Caution
For knockout work and wire insertion work, be sure to wear protective
clothing such as gloves. Otherwise you may get injured by the cut
edges of the sheet plate.
Attach grommets (22 mm in diameter) to the wire inlet ports to protect
the wires, or use conduit tubes.
e
Tie and fix the instrumentation wires to the right and left sides of two places (i.e. the sheet plate of the
main unit and the cover; thus four places in total). Plastic cable ties are provided with the unit.
(1) Wiring work for water level control
Referring to the following table, connect wires to receiver tank electrodes.
· Ball tap type ·································· Table 4-3-2(a)
· Inflow solenoid valve type ················· Table 4-3-2(b)
Note
· The Tank Selection setting is set to “No tank” before shipment. Before
starting the operation of the pumps with receiver tank electrodes connected,
select water tank(s) you use on the operation panel.
(
ĺ
see 7.2.)
· When using an inflow solenoid valve, check the type of the solenoid valve
(normally open or normally closed), and set the type (parameter P103).
(
ĺ
see 7.5.)
· Set the Solenoid Valve Operation setting to “Auto” on the operation panel
before use.
(
ĺ
see 7.3.)
6 inlet ports for instrumentation wires
Run the wires through either side.
Tie the wires at two places each
on the right and left sides.
Fig. 4-3-2 (a) Connections for instrumentation wires (for motor output of up to 3.7 kW)
