KPI-3002H2E heat recovery unit
1. Unit inspection and maintenance access.
Check that there is enough space around the unit. Consult the corresponding chapter of the Technical Catalogue for
information on the unit measurements.
Before starting installation, plan the direction of the pipes and wiring required. Also bear in mind that there must be enough
space around the unit for installation and maintenance.
Check that the ceiling surface where the unit is to be installed is completely horizontal.
Installation
Avoid obstacles that could block the air inlet or outlet flow.
Choose a position in which the unit does not take in outdoor air mixed with combustion or exhaust fumes.
The unit must not be covered in snow.
Do not use the unit in the winter when the weather conditions may
lead to the formation of condensation in the heat exchanger.
N O T E
• The formation of condensation arises if the line
connecting the outdoor and indoor temperature points and
the conditions of humidity cross the saturation curve in
the psychrometric chart.
• Raising the temperature at point A (outdoor air) to point A'
gives improved conditions in which the line connecting
the outdoor and indoor temperature points and the
conditions of humidity do not cross the saturation curve.
In this case, the total heat exchanger can be used.
The limit for ambient conditions in which the total heat exchanger is used is shown in the table below as an example, at an
outdoor air temperature of 0 °C, -5 °C and -10 °C and an indoor air temperature of 30 °C. Where the indoor or outdoor air
humidity is higher, condensation may accumulate and flow outside the unit.
The method for raising the temperature of A (outdoor temperature) must be determined according to current law in the place
where the unit is installed.
Outdoor air temperature
Indoor air temperature
Indoor air relative
humidity
Indoor air absolute
humidity
(Dry bulb) (Dry bulb) % (kg/kg)
0 °C 30 °C 47 0.0125
-5 °C 30 °C 41 0.0105
-10 °C 30 °C 34 0.0090
2 Unit installation
62
SMGB0063 rev. 1 - 10/2010
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