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IOM_WPHBA HE-WPHA HE_091a1201_207815_180701_EN
HORIZONTAL WATER-AIR COMPACT PACKAGED UNITS
WPHA HE / WPHBA HE
INSTALLATION
WATER DRAIN
The indoor drain unit (of condensate water) has a 3/4” gas (ISO 228-1, BSPP) male connection.
Condensate drain pipe diameter should be equal or larger than the unit connection depending on the line length
and general building configuration.
The drainage line should be inclined a minimum 2% for proper water evacuation.
When drain line is exposed to air temperatures below 0 degrees, it is necessary to cover with thermal insulation
or electrical heating wire to avoid water freezing and tube damage.
It is convenient to install the drain trap with proper dimensions (see diagram).
AIR DUCTS
Air duct dimensions will be determined according to the airflow and available pressure of the unit.
Ducts must be designed by qualified technical people.
Use ducts made of non-inflammable materials in order to avoid any risk of fire as a consequence of the
deflagration of gases. It is advisable to use metal sheet duct with insulation.
Use flexible ducts to connect air ducts into the unit and thus avoid vibration and noise transmission.
A bad design of the ducts will reduce the performance of the machine and may block access to maintenance or
change filters, fans, etc., especially when there is only one access.
Recommended drain trap
measures
