Screw connection condensate connection
EPP foam cover for fan (2x)
Heat exchanger with condensate pan
EPP foam cover for filter and heat exchanger with strap
EPP foam cover for filter and heat exchanger with strap
Tab. 1: Main components FOCUS
Type plate 2.1.1
The type plate clearly identifies the product. The information on the type plate is necessary for the safe
use of the product and in case of service-related questions. The type plate is located on the side of the air
connections of the HRU. The type plate must be permanently attached to the product.
Fig 2: Type plate FOCUS
Requirements on the assembly site 2.1.2
The heat recovery unit is suitable for being mounted in frost-free interior areas. The indoor-climate
ambient conditions must not permanently exceed 70 % r. H. at 22 °C.
Frost protection 2.1.3
The FOCUS is equipped with an automatic frost protection which prevents the heat exchanger from
freezing at a too low outside temperature. If the outside air temperature limit at the device falls below the
threshold value of -3 °C the fans are switched off temporarily, if no external frost protection measure on
the device is effective. The device control activates an optionally available electric preheater battery if the
threshold value falls below 0 °C.
Monitoring of the supply air temperature for frost protection of an optional hydraulic
heater battery downstream is not available!
Joint operation with heat-producing appliances 2.1.4
In case of simultaneous operation with heat-producing appliances, e.g. chimneys, the corresponding
standards and regulations must be complied with by the qualified personnel. The joint operation of indoor
air-dependant heat-producing appliances and ventilation plants requires an appropriate safety device
(differential pressure switch) or a plant-specific measure, in the event that dangerous negative pressures
can be generated in the installation room of the heat-producing appliance during operation.
Available control modules 2.2
The FOCUS can be equipped with the following control panels:
External control panel (W x H x D in mm: 71 x 71 x 25)
External control signal (0-10 V)
External boost ventilation switch (any number, potential-free)
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