Carel humiSteam Basic - Supply Water Requirements; Drain Water and Tempering

12
ENG
“UE BASIC” +03U0042EN - rel. 1.3 - 10 May 2013
installatoreutenteassistenza
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 fl ow-rate no lower
than the rated fl ow of the fi ll solenoid valve, the connection is G3/4M (see
par. “11.2 Technical specifi cations”);
• range hardness 10° to 40 °f (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
Specifi c conductivity at
20°C (σ
R, 20 °C
)
µS/cm 300 1250 75 350
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 specifi 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, aff 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.
2.3 Drain tempering
The unit is fi tted with a tempering valve that, opening at the same time as
the drain valve, adds cold water to the drain line, thus ensuring a maximum
temperature of the drain water of 60°C/140°F.
Note: The use of the drain tempering option, increase the fl ow rate of the
drain water.