Chilled water precision air conditioning
units, available in the downflow
configuration, suitable for close control high
tech environments as well as for comfort
applications.
All essential components are accessible
from the front and no side access shall be
required for servicing to allow units to be
positioned side-by-side or in a corner.
GENERAL DESCRIPTION
FRAME
constructed from steel tube
welded to 2 mm thick steel box section
base, painted with RAL 7021 (dark grey)
epoxy powder.
CONTOUR PANELS
in 1,2 mm steel
sheet, painted with RAL 9001 (cream
colour) epoxy powder and lined with
acoustic and thermal self-estinguishing
insulation, dust and fibre-free. The front
doors shall be fixed to the frame with quick
release fasteners.
REMOVABLE INTERNAL PANELS
lined
with acoustic insulation shielding all
compartments affected by the airstream in
order to:
- decrease the overall noise level;
- seal the air flow pattern even when the
front doors are opened;
- allow checks on the internal components
with the unit in operation.
FILTERS
in non woven deep pleated
self-estinguishing media with an efficiency
of EU4 (doc. Eurovent 4-5), mounted on a
metal frame.
FAN SECTION
(belt driven type)
Radial fans in galvanized steel of the
double inlet type with the forward curved
blower shaft rotating in lifetime lubricated
bearings and driven by a 4-pole, class F
and IP55 motor mounted on an adjustable
base for belt tension adjustment. The
assembly shall be fully balanced and use
"TAPERLOCK" pulleys for vibration-free
operation.
AIRFLOW SENSOR
to activate an alarm
in the case of low or lacking air flow.
COOLING COIL
constructed of copper
tubes expanded into aluminium fins; the
large front surface coil, mounted on the
suction side of the fans to ensure uniform
air distribution, shall be mounted on a
stainless steel tray with a flexible hose to
drain the condensate.
3-WAY VALVE
driven by a modulating
servomotor electronically controlled from
the microprocessor.
ELECTRICAL REHEAT (in version T or
H)
with elements of the integral fin type
constructed of aluminum with a safety
thermostat which, in the event of
overheating, shall cut the supply and
activate the alarm.
ELECTRODE BOILER HUMIDIFIER (in
version D or H)
with modulating steam
production and with automatic control of
water salinity to ensure successful
operation on virtually any untreated water
supply.
ELECTRICAL PANEL
complying with the
recommendations of IEC, housed in a
compartment isolated from the air stream
and including:
- 24 V control circuit transformer;
- safety screen for all mains voltage
components;
- mains isolator mechanically interlocked
with the safety screen;
- miniature circuit breakers;
- contactors.
MICROPROCESSOR CONTROL
to
provide highly accurate real-time control of
the environmental conditions, at the same
time providing an exhaustive display of all
operating parameters as well as any fault
conditions (Refer to UNIFLAIR
Microprocessor Control Options
Specifications).
OPTIONAL ACCESSORIES
FRESH AIR FILTER
to be connected to a
source of fresh air via flexible ducting.
HIGHER EFFICIENCY FILTER
in non
woven self-estinguishing media with an
efficiency of EU5 (doc. Eurovent 4-5),
mounted on a metal frame.
HEIGHT ADJUSTABLE (± 25 mm, 200
mm minimum) MOUNTING FRAME
for
installations on a raised floor, complete
with rubber isolator pads.
SUCTION PLENUM
, lined with acoustic
insulation, to connect the top of the unit
with the ceiling or the ductwork when
return air is ducted; height: 600mm.
SOUND ABSORBING SUCTION
PLENUM
as above, including sound
attenuators; height: 450 mm.
HOT WATER REHEAT COIL
constructed
of copper tubes expanded into aluminium
fins, factory fitted with a 3-way water
regulating valve.
COOLING CAPACITY LIMITING DEVICE
IN THE DEHUMIDIFICATION CYCLE
with
a two-position auxiliary valve closing the
water flow in a portion of the cooling coil
when the air temperature reaches a lower
limit.
MOTORIZED DAMPER
built into the floor
stand to prevent backdraught when the
fans are not in operation (min. net floor
height: 350 mm).
RELAY FOR REMOTE CONTROL (for
units with mP3 control).
ASM2 BOARD FOR DATA
TRANSMISSION (for units with mP3
control)
to a remote BMS station via an
RS422 port or, with an external adaptor, an
RS232 port.
SERIAL ADAPTOR RS422-RS485 (for
units with mP20-mP10 control)
for
connecting to supervisory / maintenance
systems.
LAN CARD (for units with mP20
control)
for local network.
CLOCK CARD (for units with mP20
control)
for the management of time
bands and the counting of operating hours.
LAN CARD + CLOCK CARD (for units
with mP20 control).
SENSOR FOR DEHUMIDIFICATION
CYCLE
(in version C or T, without
humidifier).
DIRTY FILTER ALARM
to monitor the
pressure drop across the filter and activate
an alarm when it is dirty.
HIGH WATER TEMPERATURE ALARM
SENSOR
.
LOW WATER FLOW ALARM SENSOR
.
ADDITIONAL TEMPERATURE AND
HUMIDITY LIMIT ALARM SENSORS
in
addition to the standard microprocessor
programmable alarm thresholds.
FIRE and/or SMOKE DETECTOR
.
WATER LEAK DETECTOR
comprising a
socket-mounted detector connected to as
many leakage sensors as required.
SPECIFICATIONS
UNIT
IDENTIFICATION
SYSTEM
GB
9
EXAMPLE:
BDA2002H3 is a Chilled Water downflow unit with:
- An indicative cooling capacity of 30 Tons, series 10;
- C Electric Humidifi Dehumidification function;
- mP3 Microprocessor control option.
D
C
30
10
H
3
AIR
PATTERN
COOLING
SYSTEM
UNIT SIZE
SERIES
CONFIGURATION
CONTROL
SYSTEM
D = Downflow;
top air return
C = Cooling Only
T = Cooling
+ Electric Reheat
D = Cooling
+ Humidification
H = Cooling
+ Electric Reheat
+ Humidification
+ Dehumidification
C = Chilled water
Type
Indicative
Cooling
Capacity
G = MP10
Microprocessor
control with
graphic display
P = MP20
Microprocessor
control with LCD
display
3 = Microprocessor
mP3
0 = No control
B
FAMILY
B = Large
capacity
