3 plumbing – GeneralAire DS50 LC Elite Steam User Manual
Page 11
DS 50 / DS 50 LC +030222065 Rev. 1.2
11
3.3
Plumbing
3.3.1
Water Characterisitc Requirements
The humidifier must be supplied with water with the following characteristics:
• pressure between 20psi and 110psi or 0.1 and 0.8 MPa (1 and 8 bar)
• temperature between 33°F and 104°F or 1°C and 40°C
• flow-rate minimum of 0.83 L/min or 0.22gpm
• hardness no greater than 40°fH (equal to 400 ppm³ of CaCO), conductivity: from 125 to 1250
μS/cm
• absence of organic compounds
• the characteristics of the water of supply must fall within the following limits:
LIMIT VALUES FOR LOW SALT CONTENT WATER
LIMIT VALUES FOR LOW NORMAL WATER
Units
Min
Max
Units
Min
Max
Hydrogen ions (pH)
7
8.5
Hydrogen ions (pH)
7
8.5
Specific conductivity (R,20°C)
μS/cm
300
Specific conductivity (R,20°C)
μS/cm 125
500
Total dissolved solids (c R)
mg/l
(*)
(*)
Total dissolved solids (c R)
mg/l
(*)
(*)
Dry residue at 180°C
mg/l
(*)
(*)
Dry residue at 180°C
mg/l
(*)
(*)
Total hardness
mg/l CaC
³
O
150
400
Total hardness
mg/l CaC
³
O 0
200
Temporary hardness
mg/l CaC
³
O
=
200
Temporary hardness
mg/l CaC
³
O =
150
Iron + Manganese
mg/l Fe + Mn
=
0.2
Iron + Manganese
mg/l Fe + Mn
=
0.2
Chlorides
ppm Cl
=
30
Chlorides
ppm Cl
=
20
Chlorides mg/Si
2
O =
20
Chlorides
mg/Si
2
O = 20
Chlorine residue
mg/l Cl-
=
0.2
Chlorine residue
mg/l Cl-
=
0.2
Calcium sulphate
mg/l CaS
4
O
=
100
Calcium sulphate
mg/l CaS
4
O =
60
Tab.3.d
Tab.3.e
(*) Values dependent on the specific conductivity: in general: cR~=0.65*
σR, 20°C; R180~=0.9*σR, 20°C
Note: There is no relationship between the hardness and conductivity of water.
Water Conductivity must be matched by specifications of the steam cylinder. Check or know the water conductivity of
the proposed site before installation. Replace the steam cylinder before startup if not correct. See Table 3.f right.
DS 50 / DS 50 LC models
Conductivity
μS/cm Steam
Cylinder
DS50 300-1250
50-14
DS50LC 125-500
50-15
Tab.3.f
The following water types are not acceptable:
1. Softened water as this will lead to foam, electrode corrosion and greatly shortened
cylinder life.
2. Water containing disinfectants or corrosion inhibiters, as these are potential irritants.
3. Industrial water, boiler water or water from cooling circuits.
4. Any potentially chemically or bacteriologically contaminated water.
5. Heated water.
3.3.2 Water
Supply
Connection
We recommend the connection between the fill valve and the water supply line by
a soft poly hose capable of absorbing the water hammering in order to avoid
damage to the fill valve itself. The water line may be routed through the back or
through the bottom of the unit. With poly tubing, a tubing support must be used
to prevent tubing collapse and leaks. The fitting then threads onto the fill valve
inlet located on the bottom of the humidifier using a 3/4” G connection. Note
that there is a strainer built into the fill valve fitting underneath the unit,
which will require periodic cleaning, so be sure to allow clearance for
access. Length of 1/4” tube should be kept to less than 1M or 3 ft.
Fill valve and filter
Water drain
Fig. 3.g
Fig. 3.h
Extension tube
Water drain outlet