Specifications

a i r syst e m s
140
Motorised outdoor air damper:
Equipped with the same dampers as the economizer,
the Return Air probe is not used. Outdoor air damper
opens to pre-set position whenever the indoor fan is
operating (selected from the thermostat, the indoor fan
can be activated with the compressor or to operate
continuously) and will drive fully closed when the indoor fan shuts down.
The rain hood is painted to match the basic unit and aluminium mesh
pre-lter prevents water penetration.
Power Exhaust:
Used to mechanically relieve internal air pressure from
the Return Air section and ensure efcient fresh air
introduction on units equipped with triple input
economiser or motorised air damper. The power exhaust
fan motor works when enough Outdoor Air is blowing into
the room and if Outdoor Air temperature is acceptable (12°C < t° < 30°C).
Enthalpy sensors:
To control the economizer in humid areas, or when
indoor air humidity needs to remains dry, you should
select enthalpy regulation. Enthalpy sensors will be used
with the triple input economizer.
High speed drive:
Available for models 180, 240 and 300, the high speed
drive will increase the supply fan performance for
applications with a greater air ow and/or static pressure.
Please consult technical guide for more information..
Fresh air damper and rain hood:
The most cost effective method with a complete rain
hood and a xed damper that can be adjusted to provide
approximately 10, 15 or 25% of fresh air.
Low ambient control:
All our rooftops are designed to work in cooling mode
down to 7°C ambient temperatures. Although this
working range suits most applications, the units can
operate correctly down to -18°C with optional low
ambient control.
Barometric relief damper:
This accessory can be used to relieve internal air pressure
on units equipped with triple input economiser or
motorised air damper but no power exhaust. When
the rooftop is working in free cooling or introducing
fresh air, the damper opens to relieve over pressure from
the return air section. This accessory is comprised of a rain hood, a protective
grille and a fully assembled damper
Filter dirty switch:
Ensures that clean air is being supplied, advises when
maintenance is required to prevent excessive depression
and ensures water integrity of the AHU. These are
the main advantages of lter dirty switch.
Connected with the DPC-1 thermostat, the lter icon will
appear on the thermostat screen when a lter change is required.
Accessories or options
Triple input economizer:
This system utilizes 3 probes: Return Air, Outdoor Air and
Supply Air. The Outdoor Air damper and the Return Air
dampers are mechanically interconnected in order to
provide the same airow at the coil inlet, with a single
damper motor. The PCB compares sensor values and modulates the dampers
providing maximum efciency of the economiser system (free cooling) and comfort
(Supply Air > 12°C). Combined with the air quality sensor, your payback will be
ensured within few months. The rain hood is painted to match the basic unit and
aluminium mesh pre-lter prevents water penetration.
Indoor air quality:
This sensor measures concentrations of pollutant gases,
such as tobacco smoke, human body odours, kitchen
odours, carbon monoxide, etc… It automatically overrides
the economizer when pollutant levels rise above preset
limits. A shorting plug will set the algorithm to acceptable,
good or very good air quality. This VOC sensor (Volatile Organic Compounds)
sends an ON/OFF signal to the control PCB. The YKlon will then adjust the fresh
air damper, optimising indoor air quality and minimising the energy consumption.