Lennox INNOVA DHADC Series User Manual

Fig. 4
Humidity Control
INNOV@ units can be supplied with Humidity sensor [option].
For an independent control between T and R.H. it is necessary
to adopt one of the reheating possibilities [options].
- Electrical reheating.
- Hot Water with 3 way modulating valve.
- Hot gas reheating: this solution is only for DX version and
- looking to energy consumption - it ismade with zero extra
energy : this option is available in On/Off version or in modulating
version for more precision in parameters control. The reheating
coil design criteria allows to have bigger heating than sensible
cooling capacity allowing to dehumidify even when there are no
thermal loads inside.
Application Guide INNOV@-0907- Page 11
MAIN COMPONENTS
Aeraulic section
Fans for all versions are radial type direct driven in combination
with 4 poles motors with three phase alimentation. Fans are
statically and dynamically balanced ensuring a drastic reduction
in noise and vibrations. All models can be equipped with EC
fans with brushless motors [optional]: this technology allows to
reduce energy consumption mainly at partial load and allows
to maintain the air ow independently from external conditions.
The air circuit is completed with an air ow switch that checks
fan's faulty situation.
Hydraulic Circuit
CW units are fully assembled and pressure tested in the factory
nal test. The 3-way-valves [Fig. 4] are selected by comparing
the Kvs to the coil pressure drop in order to give to the valve
the
adequate authority for a good water ow control. The valve body
is made in brass OT 58 and the shutter is plated in RILSAN for
the maximum tightness: the unit system is PN16. The external
connection are standard supplied with 3 parts quick
connections to reduce on site working time.
Air Filter
The lters are positioned on the Top [Down ow] or just in front
of the coil [Up ow] and are made in synthetic material with me-
tallic frame. Filtration efciency is G4 according CEN EN 779. To
exchange the lter, simply open the door(s) and remove it. As
an option in the same dimension it is possible to install up to F5
lters, without any modication on the ventilation. For a higher
ltration efciency up to F9, an external plenum is needed. In
this case a G4 lter will be part of the option as a prelter. With
up ow units the High ltration plenum is positioned on the
discharge side.
Humidier Section
The steam humidier is fully controlled by the mP as well as all
operating parameters like water level, water conductivity, current
through electrodes. Fixing the tension, the current and obviously
the steam capacity depend from the water conductivity and the
water level: the algorithm mixing all parameters ensures the
right steam production avoiding at the same time foam grooving
into the cylinder. After a certain period - depending on the water
characteristics - the cylinder has to be replaced by a new one: an
European average is 3 cylinders / Year for full time operation.

Lennox INNOVA DHADC Series Specifications

General

Brand	Lennox
Model	INNOVA DHADC Series
Category	Chiller
Language	English