AIREDALE SmartCool D - Humidifier Water Requirements; Supply Water Conductivity Limits; Humidifier Water Supply Guidelines

SmartCool
TM
- D
Precision Air Conditioning
30
Precision Air Conditioning
Installation, Maintenance and Commissioning Manual :6877419 02/2013
Humidifier Bottle
Information
Limit Values for the supply water with Medium to High conductivity in an immersed
electrode humidifier.
Min Max
Hydrogen ions pH 7 8.5
Specific conductivity at 20°C σR, 20°C µS/cm 300 1250
Total dissolved solids TDS mg/l (1) (1)
Dry residue at 180°C R180 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 sulphate mg/l CaSO4 0 100
Metallic impurities mg/l 0 0
Solvents, diluents, soaps, lubricants mg/l 0 0
(1) Values depending on specific conductivity; in general: TDS 0.93 * σ20; R180 0.65 * σ20
(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 of Cl-
Limit Values for the supply water with Medium to Low conductivity in an immersed
electrode humidifier
Min Max
Hydrogen ions pH 7 8.5
Specific conductivity at 20°C σR, 20°C µS/cm 125 500
Total dissolved solids TDS mg/l (1) (1)
Dry residue at 180°C R180 mg/l (1) (1)
Total hardness TH mg/l CaCO3 50(2) 250
Temporary hardness mg/l CaCO3 30(3) 150
Iron + Manganese mg/l Fe + Mn 0 0.2
Chlorides ppm- Cl 0 20
Silica mg/l SiO2 0 20
Residual chlorine mg/l Cl 0 0.2
Calcium sulphate mg/l CaSO4 0 60
Metallic impurities mg/l 0 0
Solvents, diluents, soaps, lubricants mg/l 0 0
(1) Values depending on specific conductivity; in general: TDS 0.93 * σ20; R180 0.65 * σ20
(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 of Cl-
Warning: no relation can be demonstrated between water hardness and
conductivity.
IMPORTANT WARNING: do not treat water with softeners!
This could cause corrosion of the electrodes or the formation of foam, leading to
potential operating problems or failures.
IMPORTANT
The water supply should conform to Local Water Regulations and within the
following guidelines:
Supply water pressure between 1.0 barg to 8.0 barg, > 8.0 bar a pressure reducing valve
should be fitted.
A minimum flow rate of 1.21 l/min is required.
The humidifier inlet is fitted with a braided flexible hose, having 3/4” BSPF connection.
IMPORTANT
Ensure the union between the humidifier assembly and supply hose is fully
tightened. Any looseness, misalignment or damage to the union can lead to
water leakage.
CAUTION
It is recommended that a shut off valve and a mecha
nical strainer be fitted to the
water supply prior to the humidifier assembly.
Water Conductivity
As standard the humidifier is fitted with the standard conductivity cylinder which covers
the majority of water supplies. Low and high conductivity options can be specified at
order.
Installation