Condair HE2, Инструкция по установке и эксплуатации

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1.11 Inlet Water - Quality Guide
The quality of water being used in the HE2 system should be checked prior to the commissioning of a system.
Cond air Ltd. recommends that the HE2 system must be connected to a clean, potable (drinking water quality)
mains water supply. For areas of hard water and to minimise scale build up the water supply may be treated
by "Reverse Osmosis" (RO).
Reverse Osmosis
For HE2 systems where the water supply is treated by RO it is recommended that the system is operated
within the following parameters. The use of RO water fed tanks and reservoirs is only permitted as part of a
managed and hygiene monitored water system and should form part of the water system risk assessment.
Conductivity > 5 μS cm-1 at 20 °C Circulating HE2 pump system
Conductivity > 30 - 50 μS cm-1 at 20 °C Direct feed system
Other Water Supplies
There is a growing demand to utilise sustainable water sources to help overcome scarcity challenges and
recycle water. It is possible to use high-quality, treated effluent for non-potable applications. The following
gives guidance on reclaimed water quality that may be acceptable for use within the HE2 . “Effluent treated
water”, must be treated by an appropriate water treatment method and risk assessed to ensure it is safe and
suitable for use in the HE2 unit. It is the responsibility of the user to ensure that the water supply system is
part of a managed, hygiene monitored water system, risk assessed and complies with the local regulations
and bylaws.
Below are example water conditions that would allow a HE2 to operate within specification.
Parameter Supply Water Concern
Temperature < 20°C Warm water favours growth of bacteria
Aluminium - No specific concerns
Ammonium < 0.50 mg/l Odour passed to air
Calcium < 300 mg/l Scale formation
Chloride < 300 mg/l Corrosion of stainless steel
Colour None Not directly a concern
Copper < 1 mg/l Deposits and corrosion stimulation
Conductivity < 650 μS cm-1 at 20°C Total hardness and scale formation.
pH 6.5 to 9.5 Acid or Alkali damage to equipment.
Iron < 0.5 mg/l Deposit formation on oxidation and a
critical support role in Legionella growth.
Manganese < 0.1 mg/l Deposit formation
Nitrate - No specific concerns
Nitrite - No specific concerns
Odour Acceptable to users Smell passed to air
Sulphate < 250 mg/l No specific comments
Sodium - No specific concerns
Total organic carbon - No specific concerns
Turbidity < 5 NTU No specific concerns
Colony count 22°C < 1000 cfu/ml Indicator of contaminated water supply
Coliform bacteria < 10 cfu/100 ml Indicator of poor water quality
Legionella bacteria < 50 cfu/1000 ml Risk of Legionella
Pseudomonas species < 10 cfu/100 ml Indicator of slime forming potential