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e-MovAir-IOM-20.04-EN
5.5 CONNECTIONS TO THE DUCTS
IMPORTANT: THE UNITS MUST NEVER BE OPERATED IF THE FAN OUTLETS ARE NOT DUCTED
OR PROTECTED BY SAFETY MESH, AS PER THE UNI 9219 AND FOLLOWING STANDARDS.
•
The ducts must be sized according to the ratings of the system and the characteristics of
the fans. Incorrect calculation of the size of the ducting may lead to a drop or an increase in
output, causing the activation of any safety devices in the system.
•
To prevent the formation of condensate and attenuate the level of noise, insulated ducts
should be used.
•
Electrical continuity between the duct and the unit must be guaranteed by an earth wire.
5.6. WATER CONNECTIONS
The installation and connection of the pipes are operations that may compromise the correct operation
of the system, or worse, cause irreversible damage to the unit. These operations must be performed
by specialist person.
5.6.1. COIL WATER CONNECTIONS
The units are supplied with coils with threaded "male" fittings. Upon request, flanged fittings can be
supplied.
THE WATER INLET AND OUTLET MUST BE FITTED SO AS TO ALLOW COUNTER-CURRENT
HEAT EXCHANGE BETWEEN THE AIR AND THE FLUID (WATER OR WATER AND ANTI-FREEZE
MIXTURE), WITH THE INLET AT THE BOTTOM AND THE OUTLET AT THE TOP. FOR THIS REASON,
APPROVAL IS ALWAYS REQUIRED OF THE CONSTRUCTIONAL DRAWINGS THAT HIGHLIGHT
THE SIDE OF THE FITTINGS. MOREOVER, THE UNITS ARE FITTED WITH SPECIAL PLATES THAT
INDICATE THE WATER INLET AND OUTLET.
•
The direct expansion coils have welded fittings.
•
The connections should be tightened with care taken to avoid damage.
•
The path of the pipes must be designed so as not to create obstacles when removing the coil
or the filter from the unit and to guarantee access to the inspection doors.
•
Suitably support the pipes outside of the unit to avoid loading the weight of these onto the
coil.
•
When the pipes have been connected, push the external rubber gasket firmly against the
panel, to avoid air leaks.
•
The insulation must touch against the panel, to avoid the risk of burns / condensation.
•
Install on-off valves to isolate the coil from the rest of the circuit in the event of special
maintenance.
•
In the case of installation in particularly cold areas, if the use of an electric anti-freeze device
or the addition of anti-freeze (glycol) to the water are not envisaged, empty the system when
it remains inactive for extended periods.
•
Remove, where envisaged, the fastening bolts for transport so as to restore the play required
to guarantee the expansion of the pipes
WARNING: ALWAYS USE TWO SPANNERS WHEN TIGHTENING THE COIL FITTINGS TO THE
PIPES, SO AS TO AVOID STRESS (TORSION, THRUST) THAT MAY DAMAGE THE MANIFOLDS
INSIDE THE UNIT.
e-MovAir-IOM-20.04-EN
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