The fan assembly is installed on a highly rigid
galvanized support structure mounted with an
aerodynamically designed galvanized inlet.
The EC motors offer intelligent integral control
electronics allowing soft start-up as well as over-
temperature and short circuit protection.
The motor insulation is Class ‘B’, rated IP 54 (acc. to
EN 60529) and meets all relevant EMC directives
and requirements.
2.5. FILTERS
Filtration for protection of the finned
heat exchanger and treatment of
the supply air is provided by compact synthetic
media filters mounted in a plastic frame
(Fiberplast).
Grade of filtration according to BS EN779:2012 /
ISO16890 is class F7 / ePM2.5 65%on supply and
M5 / ePM10 70% on extract.
The low pressure drop synthetic media makes for a
low energy consumption filter that helps reduce
the overall energy consumption of the unit.
For stricter indoor air quality requirements, a F9 /
ePM2.5 80% supply air filter is optionally available
(supplied loose for installation by others on site).
The filters are mounted on slides for easy removal
and tightly sealed against the slide rails to ensure
reduced filter bypass leakage.
2.6. COUNTER FLOW PLATE HEAT
EXCHANGER
The heat recovery section is equipped with a highly
efficient counter-flow air to air heat exchanger,
exceeding the 2018 requirements of regulation
1253/2014 of the Eco-design directive for ventilation
units, with operational efficiency up to 93%.
The heat exchanger finned block
and casing are manufactured
from high thermal
transmittance and corrosion
resistant aluminium.
The exchanger is Eurovent certified and fully
tested to EN308:1997.
The heat recovery section is also provided with fully
modulating face and by-pass damper to provide
control of the supply air temperature and enable free
cooling operation when the conditions are
favourable (i.e. summer night ventilation).
In extreme conditions when the exhaust temperature
drops below the frost risk limit the unit controls
strategy provides frost protection for the heat
exchanger by bypassing some of the cold air.
Where it’s not desirable to impact the unit operation
during the frost protection strategy, an electric pre-
heating coil (frost coil) can be offered to provide
improved frost protection.
A fully removable, epoxy coated, galvanized
condensate tray fitted with a 18mm OD drain
connection is provided for condensate collection and
disposal. The condensate tray is equipped with a
water level sensor to avoid overflow of the tray by
stopping operation.
A pumped drainage system can be offered as an
option and where the depth of the ceiling void allows,
an alternative gravity assisted condensate trap
system can also be offered.
2.7. OPTIONAL FEATURES
2.7.1. INTEGRAL ELECTRICAL PRE/POST-
HEATING COIL
The unit can optionally be fitted with an electrical
pre-heater and/or post-heater manufactured with
open coil heating elements and galvanized casing.
The heater is complete with fully modulating SCR
(Silicon Controlled Rectifier) control (0-100%)
and 2 stages of overheat protection (automatic
and manual reset) all integral to the unit’s control
strategy.
The SCR control provides accurate, supply air
temperature modulation.
The heat output is precisely controlled from 0 to 100%
to a user defined setpoint by using the unit in-built
temperature sensors or a room temperature
