Idiomas disponibles
Idiomas disponibles
When channelling, the total air pressure drops at nominal flow must be
evaluated and they must be lower than the available head pressure at
the same flow.
a
c
Model
114
mm
800
a
mm
300
b
mm
600
c
mm
300
d
mm
2500
e
However it is installed, the coil inlet air temperature (ambient air) must
remain within the set limits.
IMPORTANT!
Incorrect positioning or installation of the unit may
amplify noise levels and vibrations generated
during operation.
The following accessories are available to reduce noise and
vibration:
KSA - Anti-vibration mountings.
KRAS - Intake anti-vibrating fitting
KRAM – Outlet anti-vibration fitting
When installing the unit, bear the following in mind:
non-soundproofed reflecting walls near the unit may increase the
total sound pressure level reading near the appliance by as much as 3
dB(A) for every surface;
install suitable anti-vibration mountings under the unit to avoid
transmitting vibrations to the building structure;
make all water connections using elastic joints; pipes must be firmly
supported by solid structures. If the pipes are routed through walls or
panels, insulate with elastic sleeves. If, after installation and start-up of
the unit, structural vibrations are observed in the building which provoke
such strong resonance that noise is generated in other parts of the
building, refer to a qualified acoustic technician for a complete analysis
of the problem.
b
d
Fig.8
117
121
126
128
800
800
800
800
300
360
360
360
600
600
600
600
300
360
360
360
2500
2500
2500
2500
SECTION II : INSTALLATION AND MAINTENANCE
II.6
WATER CONNECTIONS
II.6.1.1
Connection to the system
The unit is equipped with male threaded hydraulic connections and
manual air bleed valves located inside the casing near the upper and
lower hydraulic connections; in the T and H version, also on the pump
compartment.
In the T and H versions, install the drain cock on the storage provided
with the machine.
IMPORTANT!
It is advisable to install shut-off valves that isolate
the unit from the rest of the system. A mesh filter
with a square section (longest side = 0.8 mm) of a
suitable size and pressure drop for the system must
be installed. Clean the filter from time to time.
The rate of the water that flows through the heat exchanger must not
drop below the value corresponding to a temperature differential of 8°C.
For proper machine functioning, it is good practice for the system to
contain enough water to guarantee sufficient thermal inertia and avoid
starts that are too close together.
Remember that there is a timer in the machine which prevents start-up
for 3 minutes after a stop.
In the T and H versions, the use and maintenance manual for supplied
pumps or circulators comes attached to this manual.
II.6.1.2
Minimum hydraulic circuit contents
The electronic control equipped with the AdaptiveFunction Plus makes
it possible to reduce the amount of water in the system. For proper
operation of the unit, a minimum amount of water must be ensured in
the hydraulic system.
Model
System minimum
content
If the amount of water in the system is less than the indicated amount,
install an additional storage tank.
II.6.1.3
Protecting the unit from frost
IMPORTANT!
If the mains switch is opened, it cuts the electricity
supply to the plate exchanger heater and the
storage tank antifreeze heater (if included). The
switch should only be disconnected for cleaning,
maintenance or repair of the machine.
When the unit is running, the control board protects the heat-exchanger
from freezing by tripping the antifreeze alarm which stops the machine if
the temperature of probe fitted on the heat-exchanger reaches the set
point value.
IMPORTANT!
When the unit is out of service, drain all the water
from the circuit.
Any water left inside the pump must be drained using the specific
screws.
If the draining operation is felt to be too much trouble, ethylene glycol
may be mixed with the water in suitable proportions in order to
guarantee protection from freezing.
IMPORTANT!
Mixing the water with glycol modifies the
performance of the unit.
Freezing temperatures depending on the percentage of ethylene glycol
are listed below. Maximum concentration of ethylene glycol 30%.
Design air temperature in °C
% glycol in weight
Freezing temperature °C
To set the antifreeze set, see Par. I.8.7.
27
114
117
121
l
28
34
44
2
0
-3
10
15
20
-5
-7
-10
126
128
52
60
-6
-10
25
30
-13
-16
