Hitecsa EWMIG 236 Manual De Instalación, Uso Y Mantenimiento página 34

The unit should be correctly levelled and positioned on a supporting
surface capable of sustaining its full weight. It must not be installed on
brackets or shelves.
EWMIG 236÷260
L4
L3
Model 236
L1 mm 800
L2 mm 1000
L3 mm 800
L4 mm 800
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.
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.
II.6.2 RECOMMENDED INSTALLATION
Once the connections to the unit are made, check that none of the pipes leak, and bleed the air from the system. 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. The minimum flow rate to be guaranteed
to the machine is 4700 l/h. If the flow rate drops below this value, the flow alarm may be triggered.
L1
L2
245 250 260
800 800 800
1000 1000 1000
800 800 800
800 800 800
1
Valve
2
Water filter (to be installed by the installer)
3
Water inlet main exchanger
4
Water outlet main exchanger
SECTION II: INSTALLATION AND MAINTENANCE
II.6 WATER CONNECTIONS
II.6.1 CONNECTION TO THE SYSTEM
IMPORTANT!
The layout of the water system and connection of
the system to the unit must be carried out in
conformity with local and national rules in force.
IMPORTANT!
It is advisable to install shut-off valves that isolate
the unit from the rest of the system. Mesh filters
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.
IMPORTANT!
The expansion tank on the machine is sufficient to
protect the unit. The installer is in charge of sizing
and installing the system's expansion tank.
○ The unit is equipped with male threaded hydraulic connections and
manual air vent valve placed inside the cabinet.
○ It is advisable to install cut-off valves that isolate the unit from the
rest of the system and elastic connection joints.
○ It is mandatory to install a square metal mesh filter (longest side =
0.8 mm) of adequate size and pressure drops for the system on the unit
return pipes.
○ The expansion tank on the machine has limited capacity to protect
the hydraulic circuit inside the machine.
○ 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.
○ During long periods of inactivity, it is advisable to drain the water
from the system.
○ It is possible to avoid draining the water by adding ethylene glycol to
the water circuit (see Protecting the unit from frost).
1
2
1
1
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