Hitachi YUTAKI Series - Page 58

Electrical wiring
Service Manual
56
Accessories electrical installation
SMGB0066 rev.0 - 12/2009

note
The motor may become damaged by overvoltage. -
Before applying voltage to the motor, double-check the voltage. -
Connect to the mains and connect the SK 602/ SK 622 and SK-C2 tripping unit (observe rating plate data) in -
accordance with the switching diagrams (Fig. 1).

Toguaranteeprotectionagainstdrippingwaterandtoensurestrainreliefofthecablegland(PG13.5),aconnecting -
cablewithanexternaldiameterof10-12mmistobeusedandassembledasshowninFig.2.Inaddition,thecables
in the vicinity of the cable gland are to be bent into a run-off loop to drain off any dripping water.
¡


P
1
max
(see rating plate data)
  
TOP-S 25/7
1~230V
P
1
max≤245W
Internal switch off of the motor
main power supply
Auto-reset-once the motor
has cooled down the pump
will automatically switch
back on
Speedadjustment
switch,3settings
TOP-S 25/10
1~230V
330W≤P
1
max≤400W
WSK and external switch
(SK602/SK622,C-SKorother
control unit)
Manually at the external
switch box once the motor
has cooled down
Speedadjustment
switch,3settings
¡
Thesystemmustbelledandventedproperly.Thepumprotorchamberwillventautomaticallyafterashortrunningperiod.
Brief dry running will not damage the pump. The pumps wich are equipped with vent screws can be ventilated as follows if
necessary.
Switch off the pump.1.
Close the shut-off valve on the discharge side.2.

caution
Risk of scalding. -
Depending on the uid temperature and the system presssure, if the vent screw is completely loosened hot -
liquid or gas should escape or even shoot out at high pressure. Protect all electrical parts against the water
released from the unit.