18/10/18 5
UKUNDA
SIG AH
Heat Recovery unit
Installation-Operation-Maintenance
reserves the right to change the specifications of the product at any time without prior notice
3.1 SAFETY
Installation has to be carried on by a qualified technician.
Unit and accessories must be supplied by a dedicated
power line and duly sized differential safety and thermal
protection. Before proceeding with maintenance please
unplug the system.
Unit and accessories must not be used as security ven-
tilation systems. Do not install in potentially explosive
atmosphere.
All control wires need be 50 mm away from power cable
(because of magnetic fields).
Use genuine spare parts only to be sure not to void war-
ranty.
Obey the local fire regulations, as well as environmental
law requirements.
The manufacturer does not accept liability for this.
Observe as well the safety regulations and wear protec-
tive gloves.
The unit is designed to provide mechanical ventilation
with heat recovery. The unit can operate with constant
speed, constant air flow or constant pressure, with relat-
ed accessories. The unit is equipped with high efficiency
heat exchanger (up to 95% heat can be recovered) and
with low consumption EC motors fan.
The unit is for indoor installation. Operation Temperature
Before starting installation check that the unit has been
supplied complete and undamaged. Visible loss or dam-
age is apparent at the time of delivery must be noted.
Noted loss or damage must be recorded in detail on the
delivery receipt. When recording loss or damage, please
use specific details and try to avoid general or generic
terms such as “box damaged” or “torn”.
Check also size, model and accessories.
The unit must be stored in a dry clean place protected
from frosting and magnetic fields in its original packag-
ing until installation.
In case of long-term storage, or inactivity the unit must
be protected from dust and moisture, and run the test
described in part 1 1995-11 DIN VDE 0702-1.
Don’t run the unit prior to complete installation.
4 INSTALLATION
During installation leave a free space to maintenance
and service. Tha access panels have to be opened for
that purpose, see free space reccomendation for ser-
vicing and to allow internal components to be removed
for cleaning or service (for ex. heat exchangers, fans,
filters).
3.2 UNIT CONSIGNEE AND STORAGE
is 0-40°C (without ambient frosting). For external Tem-
perature lower than -10°C preheater is recommended.
Do not continuously use the unit in the presence of water
vapor (both internal and external to the unit). For high
humidity atmosphere inquiry the manufacturer.
The automatic frost protection is provided by flow imbal-
ancing. Optional integrated heating coil for lower tem-
peratures is recommended.
Electronic controlled bypass damper is provided to sup-
ply filtered outside fresh air. Bypass opens and clos-
es according to the setting available on touch screen
(KTS) or can be driven by an external input. Min exter-
nal temperature to close bypass and threshold internal
temperature to open bypass can be set. High surface
area washable G4 filter (coarse) (on return side) and F7
ePM1 55%(fresh side) are standard.
Clogged filter alarm is by pressure sensors as standard.
Installing conditions and aeraulic system if not adequate
or properly planned can affect the nominal performanc-
es of the unit.
