EBARA A70W Instruction Manual page 32

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Table 4.1 Industrial Water Supply Quality Specifications
(Japan Industrial Water Association, Industrial Water Quality Standards Committee)
Turbidity
pH
Alkalinity(CaCO3)
Hardness(CaCO3)
Evaporation residue
Chlorine ion
Iron
Manganese
DANGER
CAUTION
CAUTION
CAUTION
CAUTION
(ppm) 20
6.5-8.0
(ppm) 75
(ppm) 120
(ppm) 250
(ppm) 80
(ppm) 0.3
(ppm) 0.2
When disconnecting water, first close the supply valve and then
remove the supply coupler.
When connecting, insert the return coupler first.
Connecting or disconnecting in the wrong order may cause a
rapid pressure rise—leading to a water leak.
Even if the cooling water flow rate drops, the pump will continue
to operate until the casing temperature reaches the TRIP limit.
Select facility water piping rated for at least 70 ℃ at the
operating pressure.
Do not connect pump cooling water loops in series. Select
piping to ensure sufficient flow through each pump.
Connect supply and return couplers correctly to avoid reverse
flow. Reverse flow will read incorrectly on the LCD, will not
cool the pump properly, and may lead to an accident.
In humid locations, allowing the cooling water to run when the
pump is stopped will lead to condensation on parts of the
pump. If droplets appear on the outside of the water tubes
when the pump is not running, cut off water flow.
Correct
Wrong
Socket
Sleeve
Figure 4.2 Coupler
EBARA Corporation
In / Out
Marking
Plug