Translation of the original operating manual
14
AL-KO
AIR
CABINET
®
A
air distributor module
13
Exhaust air filter
B
Silencer module
14
LAN connection
C
Basic unit
15
Cable bushing for connection cable with 230 V safety
plug
L
Air distributor module, supply air / exhaust air fittings,
left-hand side
16
Foot
R
Air distributor module, supply air / exhaust air fittings,
right-hand side
17
CO
2
sensor, exhaust air
1
Shut-off damper with stepper motor
18
Heat recovery
2
Exhaust air fitting
19
Drip pan
3
Outdoor air fitting
20
Electric air heater with safety temperature limiter
4
Exhaust air grille (exhaust air opening)
21
Exhaust air / supply air partition plate
5
Sound absorber
22
Supply air fan
6
Outdoor air filter
23
Exhaust air fan
7
Electrical control cabinet
24
Supply air fitting
8
Control unit connection socket
25
Maintenance panel
9
LED status display
26
Maintenance door
10
Main switch
27
Maintenance door turn lock
11
Bypass damper (thermal bypass)
28
Maintenance panel turn lock
12
Filter pressure monitoring and heat recovery
3.1.2 Functional sequence
The compact air handling unit controls two parallel and permanent processes for the supply of outdoor air during its
operation: The unit draws in room air, filters it, extracts heat from it if necessary and passes it out into the open as ex
-
haust air. At the same time, outside air is drawn in, filtered, heated if necessary by heat recovery with optional auxiliary
heating and discharged to the interior.
3.1.3 Unit modules
The
AL-KO
AIR
CABINET
®
compact air handling unit consists of three modules which are assembled at the installation
site of the unit:
Basic unit
Silencer module
Air distributor module
3.1.3.1 Basic unit
The basic unit (C) contains the components for filtering the air flows, the heat recovery (18) with thermal bypass (11), an
electric air heater (20) for air heating, the low-noise EC fans (22), (23) for conducting the two air flows, the CO
2
sensor
for the exhaust air (17) and the pressure monitoring (12). In addition, the electrical control cabinet (7) in the basic unit.
Four feet (16), on which the mounted compact air handling unit rests, are mounted on the base.
The electric air heater (20) is equipped with a safety temperature limiter which interrupts the circuit if the surface tem-
perature of the electric air heater (20) is too high. The safety temperature limiter must be reset manually after automatic
triggering.
Two filters are used to clean the air flows in the unit: The exhaust air filter (13) cleans the exhaust air from the space
and protects the unit from contamination. The outdoor air filter (6) cleans the fresh outdoor air and meets the highest
hygiene standards.
The switch cabinet records the control of the unit on the basis of Siemens Climatix and its electronics (see chapter
A countercurrent plate heat exchanger is used for heat recovery (18) from the exhaust air and to heat the outside air;
the electric air heater (20) is switched on by the control unit if necessary to further heat the fresh outside air before it is
released into the space. The bypass damper (11), which is driven by a servomotor and monitored by the control, makes
it possible to bypass the heat recovery, for example on days with high outside temperatures.