![background image](http://html1.mh-extra.com/html/daikin/uatya-bfc2y1/uatya-bfc2y1_instructions-for-installation-use-and-maintenance-manual_4705893056.webp)
Translation from original instructions
Packaged Rooftop
56
We reserve the right to make changes without any prior notice.
UATYA
4P645202-2
WF WT
Fig. 39 Humidifier feeding
The acronyms in the diagram have the following meanings:
-
WF = mechanical filter;
-
WT = shut-off valve.
The humidifier must be fed with water from the public water system having the specifications below:
•
pressure ranging between 0.1 and 0.8 MPa (1...8 bar, 14.5...116 PSI);
• temperature ranging between 1 and 40°C;
•
instant flow rate equal to the nominal flow rate of the feed solenoid valve/electric pump (see table);
•
connection type ¾”G, male.
Humidifier range [kg/h]
3
5-8
10-15-18
25-35-45
Max. input instant flow rate [l/min]
0,6
1,2
1,2
4
A check must be made that the parameters regarding feed water conductivity are within the limit values listed in the
table.
If the water conductivity is outside the range specified in the table, the cylinder type must be changed.
Description
Substance
UM
Limits
Min.
Max
Hydrogen ion activity (pH)
7
8,5
Specific conductivity at 20 °C (σ
R 20 °C
)
µS/cm
350
750
Total dissolved solids (TDS)
mg/l
(
1
)
(
1
)
Fixed residue at 180 °C (R
180
)
mg/l
(
1
)
(
1
)
Total hardness (TH)
CaCO
3
mg/l
100(
2
)
400
Temporary hardness
CaCO
3
mg/l
60(
3
)
300
Iron + Manganese
Fe + Mn
mg/l
0
0,2
Chlorides
Cl
-
ppm
0
30
Silica
SiO
2
mg/l
0
20
Residual chlorine
Cl
mg/l
0
0,2
Calcium sulphate
CaSO
4
mg/l
0
100
Metal impurities
mg/l
0
0
Solvents, thinners, soaps, lubricants
mg/l
0
0
(
1
) These values depend on specific conductivity. Normally: TDS ~ 0,93 * σ
20
; R
180
~ 0,65 * σ
20
(
2
) not below 200% of chlorides contained in 1 mg/l of Cl
-
(
3
) not below 300% of chlorides contained in 1 mg/l of Cl
-
Water must not be treated in softeners.
This may cause the electrodes to get corroded and may induce foaming, with potential problems
affecting regular service.