FläktGroup Row-DENCO DRC 020, Operation Manual, Page: 69 / 92

Row -DENCO Commissioning and Testing
FläktGroup DC-2014-0106-GB 2019-02/R3 • Subject to modifications 69
Tab. 10-2
(1) Values depending on specific conductivity; in general: TDS

0,93 *
σ
R, 20 °C
; R180

0,65 *
σ
R, 20 °C
(2) not lower than 200% of the chloride content in mg/l of Cl-
(3) not lower than 300% of the chloride content in mg/l ofCl-
The cylinder supplied as indicated in the price list refers to the model for medium con-
ductivity (350...750
μ
S/cm). Models are available upon request for low conductivity
(125-350
μ
S/cm) or high conductivity (750-1250
μ
S/cm). Contact the office to a specific
quotation.
10.14.6 Humidifier and condensate drain
Underneath the drain solenoid valve on the steam production unit is an attachment for
draining the water. This is already fitted with a hose coupling for connecting the hose
running to the sewerage system in the building. A rubber or plastic hose should be
used, resistant to 100°C, with an inside diameter of 32 mm. Fit a trap in the section of
the hose outside of the unit to avoid bad odours and to prevent water from overflowing
from the humidifier pan.
During installation, pour water into the condensate collection pan and the humidifier
pan, so as to fill the drain traps outside and inside the unit with water. Downstream of
the drain trap ensure a minimum slope of 1%.
Fig. 10-22
LIMIT VALUES FOR IMMERSED ELECTRODE HUMIDIFIER FEED WATER
WITH MEDIUM-HIGH CONDUCTIVITY
LIMITS
Min Max
Mains pressure bar 1 8
Hydrogen ions pH - 7 8,5
Specific conductivity at 20°C
σ
R, 20 °C
- μ S/cm 300 1250
Total dissolved solids TDS - mg/l
(
1
) (
1
)
Dry residue at 180°C
R
180
- mg/l
(
1
) (
1
)
Total hardness TH - mg/l CaCO3 100(
2
) 400
Temporary hardness - mg/l CaCO3 60(
3
) 300
Iron + Manganese - mg/l Fe + Mn 0 0,2
Chlorides - ppm Cl 0 30
Silica
- mg/l SiO2 0 20
Residual chlorine - mg/l Cl
-
0 0,2
Calcium sulphateo - mg/l CaSO4 0 100
Metallic impurities - mg/l 0 0
Solvents, diluents, soaps, lubricants - mg/l 0 0
Hot surfaces can cause injuries!
The water exiting the steam cylinder is very hot. The humidifier drain hose must not
be fastened to electrical cables and must run down vertically so as to avoid any
contact with these cables.
•
Wear protective gloves.