Cooling Water Piping - EBARA ESA500W Instruction Manual

P.14

4.2.2 Cooling Water Piping

Be sure to connect the cooling water pipes to the correct inlet and outlet ports.
The connector ports are provided with couplers. Push in the plug till the end of
socket. Socket sleeve returns to front. (Fig. 4.2)
Be sure that the supply/return plugs are not connected in reverse. The diameters
are slightly different. In/Out markings are provided on each plugs.
When the coupler is pulled out the water pipe will be automatically blocked. Use
cooling water corresponding to the specifications of Table 4.1 below.
Table 4.1 Industrial Water Supply Quality Specification
(Japan Industrial Water Association, Industrial
Water Quality Standards Committee)
Turbidity
pH
Alkalinity(CaCO3)
Hardness(CaCO3)
Evaporation residue
Chlorine ion
Iron
Manganese
CAUTION
CAUTION
PM10U
(ppm) 20
6.5-8.0
(ppm) 75
(ppm) 120
(ppm) 250
(ppm) 80
(ppm) 0.3
(ppm) 0.2
In the case of removing the coupler, at first close the valve
of cooling water supply line and next remove the coupler
from the cooling water supply.
In the case of connecting the coupler , connect it with the cooling
water return (ret. outline drawing).
If the above is neglected, pressure in the cooling water
piping rises rapidly and there is a possibility to cause the
water leak.
Even when the cooling water flow rate drops, the pump will
continue to operate until the pump part reach a temperature
corresponding to the safety limit.
The material selected for the water piping of facility side should
have a heat resistance so that it can withstand a maximum
temperature of at least 70℃ at the operating pressure.
Correct
Wrong
Socket
Sleeve
Fig. 4.2 Coupler
EBARA
In / Out
Marking
Plug
CORPORATION