Supply Water; Drain Water - Carel heaterSteam User Manual

ENG

2.1 Supply water

The supply water for the electric heater humidifi er must not be corrosive,
must not emit bad odours, and must not contain too much lime to
avoid excessive deposits. The water, supplied from mains of drinking
water or demineralised water, must have the following characteristics:
LIMIT VALUES FOR THE HEATER HUMIDIFIER WATER
Specifi c conductivity at 20°C /68°fH
Total dissolved solids
Fixed residual at 180°C/ 356°fH
Hydrogen ion activity
Total hardness
Temporary hardness
Chlorides
Iron + Manganese
Silica
Residual Chlorine
Calcium sulphate
Metallic impurities
Solvents, diluents, detergents, lubricants
1.
Values depending on the specifi c conductivity; in general: TDS ≈0,93 * σR, 20
°C; R180 ≈0,65 * σR , 20 °C;
2.
Not lower than 200% the content of chloride in mg/l Cl- ;
3.
Not lower than 300% the content of chloride in mg/l Cl- ;
4.
It could be necessary to intervene on the drain rate to avoid a concentration
in the boiling water higher than 300 mg/l Cl-;
For particularly aggressive water (conductivity <1 μS/cm), use titanium heaters
(heaterSteam titanium model).
Important: treating the water with water softeners or
polyphosphates dispensers is not allowed; it allows for reduced
maintenance but favors the concentration of dissolved salts in the
water in the cylinder, and possible operation irregularities due to the
formation of foam. Should this be impossible to avoid, it requires
dilution with ordinary mains water in such a quantity as to guarantee at
least 60% of its initial hardness value, and not less than 5°f. Water
treatment with reverse osmosis demineralisers is allowed.
Not recommended:
1. the use of well water, industrial water or water from cooling circuits
and, in general, water which may be chemically or bacteriologically
contaminated;
2. the addition to the water of disinfectants or anticorrosion
compounds, as these may cause irritation.
Note: no relationship can be proven between water hardness
and conductivity; nonetheless, as an indication only, water with a
hardness of 40°f should have a conductivity of approximately 900-1000
mS/cm a 20 °C.

2.2 Drain water

•
contains the same substances dissolved in the supply water, but in
larger amounts;
•
it can reach a temperature of 100 °C (212° F);
•
it is not toxic and can be drained in the white waters collection
system.
3. for drain tempering versions, water temperature will be 60°C (140°F),
with temperature is max 25 °C guaranteed.
Important: completely demineralised water is aggressive. For
connection to a water system with fully demineralized water use
only installation items made of plastic resistant to chemicals (eg.
Polypropylene) or stainless steel.
"heaterSteam" +0300080EN - rel. 1.0 - 27.04.2016
Min Max
σ20 - μS/cm 0 1500
TDS – mg/l (1) (1)
TDS – mg/l (1) (1)
pH 6 8.5
TH– mg/l CaCO3 0 (2) 400
mg/l CaCO3 0 (3) 300
ppm Cl = 50(4)
mg/l Fe+Mn = 0.2
mg/l SIO2 = 20
mg/l Cl- = 0.2
mg/l CaSO4 = 100
mg/l 0 0
mg/l 0 0
Tab. 2.a
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