User manual

12
EN
“UEX-PLUS” +030220621 - rel. 1.1 - 30.05.2008
installeruserservice
2.1 Supply water
Only use mains water with:
pressure between 0.1 and 0.8 MPa (14.5 and 116 PSI), temperature •
between 1 and 40 °C (33.8 and104 °F) and an instant  ow-rate no lower
than the rated  ow of the  ll solenoid valve, the connection is G3/4M
(see par. “Technical speci cations” page 41);
range hardness 10 to 40 °F h (equal to 400 ppm of CaCO
•
3
), conductivity:
75 to 1250 μS/cm;
no organic compounds.
•
supply water
characteristics
unit of
measure
normal
water
water with low
salt content
min. max. min. max.
Hydrogen ions (pH) 7 8.5 7 8,5
Speci c conductivity at
20°C (σ
R, 20 °C
)
μS/cm 350 1250 75 300
Total dissolved solids (c
R
) mg/l (
1
)(
1
)(
1
)(
1
)
Dry residue at 180°C (R
180
) mg/l (
1
)(
1
)(
1
)(
1
)
Total hardness (TH) mg/l CaCO
3
100
(2)
400 50
(2)
150
Temporary hardness mg/l CaCO
3
60
(3)
300 30
(3)
100
Iron + Manganese mg/l Fe+Mn = 0.2 = 0.2
Chlorides ppm Cl = 30 = 20
Silica mg/l SiO
2
=20 = 20
Residual chlorine mg/l Cl- = 0.2 = 0.2
Calcium sulphate mg/l CaSO
4
= 100 = 60
Metallic impurities mg/l 0 0 0 0
Solvents, thinners,
detergents, lubricants
mg/l 0 0 0 0
Tab. 3.a
(1)
= values depend on the speci c conductivity; in general:
C
R
≅0.65 * σ
R, 20 °C
; R
180
≅0.93 * σ
R, 20 °C
(2)
= not less than 200% of the chloride content in mg/l CL
(3)
= not less than 300% of the chloride content in mg/l CL
There is not reliable relationship between hardness and conductivity of
the water
Important:
Important:
do not treat the water with softeners, this may cause the entrainment
•
of foam, a ecting the operation of the unit;
do not add disinfectants or anticorrosive compounds to the water, as •
these are potential irritants;
the use of well water, industrial water or water from cooling circuits •
and, in general, any potentially chemically or bacteriologically
contaminated water is not recommended.
2.2 Drain water
this contains the same substances dissolved in the supply water, •
however in larger quantities;
it may reach a temperature of 100 °C (212 °F);•
it is not toxic and can be drained into the sewerage system.•