8
Product Installation
General installation requirements
1. EvaPack™ humidifier must be installed into the Air Handling Unit (AHU) or Duct.
2. AHU / Duct – work floor must be designed with a loading capacity capable of supporting the humidifier
weight when wet.
3. EvaPack™ humidifier must be installed horizontally. Armstrong International recommends using a spirit level
to make sure that the unit is level front to back and across the width when installed. Failure to observe this
point could result in footing of the AHU/Duct, or an incomplete unit emptying.
4. Once EvaPack™ humidifier has been positioned in a section of air handling unit, non-corrosive blanking
plates must be installed to prevent air bypass around the unit in the AHU.
5. EvaPack™ must be cleaned before the initial fan starting-up, the pad must be flushed with water several
times to eliminate remaining dust.
6. Check that there is no water leakage coming from water connection or others.
7. The standards EN 13053 and EN 1886 should be respected and mainly:
7-a. Humidifiers must not be placed directly upstream of filters or attenuator (according to
EN Standards)
7-b. Supply air units to have at least two filter stages (first stage min. ePM1 ≥ 50% or F7 filter).
The humidifier must be placed in-between the filter stages.
7-c. Inspection access: An inspection opening (Clear width not less than 150 mm) and lighting of
EvaPack™ humidifier chamber shall be provided. No external light must enter through the housing
of the lighting. It must be possible to recognize the condition of the lighting (on/off) from outside.
ADDITIONAL FOR HYGIENIC VDI 3803 and VDI-6022 REQUIREMENTS
1. All the non-metallic product used for the installation (seal, etc.) must not absorb moisture or provide a
nutrient substrate for micro-organisms.
2. The relative humidity downstream from the humidifier section must not exceed 90%. It must be ensured that
drops of water could not reach the components installed downstream.
3. Max. number of germs of the circulation water: − relating to the total colony number 1000 cfu/ml. − relating
to Legionella spp. 100 cfu/100 ml.
4. Drainage system must be equipped with a siphon with non-return valve or a siphon disconnected from the
sewage network.
5. Shutdown: In case of shutdown or failure of the ventilating and air-conditioning system, the humidifier shall
be switched off automatically.
OTHER GENERAL INSTALLATION RECOMMENDATIONS
1. ARMSTRONG recommends installation within a waterproof section.
2. EvaPack™ humidifier components should be easily accessible for checking, inspection and cleaning at any
time.
3. It is recommended not to exceed 55 °C in the processed air
temperature when the pad is not wetted.
The non-metallic parts might be damaged over this temperature.
The dry bulb temperature and the wet bulb temperature of the inlet air
must be positive to avoid water freezing on the pad.
Summary of Contents for EvaPack Series
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