AERMEC URX CF, Selection And Installation Manual

Heat recovery units with refrigeration circuit - 

URX_CF

 -

24

Selection and installation manual 

GB

Connection of ducts

CAUTION!
never start up the unit when the fan ports 
are not ducted or covered by protective 
mesh. 

See fig. 10 for the installation of the ducts:
• use adequate brackets to sustain the 

ducts in order to avoid that the recovery 
unit is overloaded by their weight;

•  in order to prevent the transmission of 

vibrations and noise, Aermec S.p.A. sug-
gests the use of ducts with a frontal mass 
higher than 10 kg/m

2.;

;

• connect the supply and exhaust ports to 

the ducts using vibration-damping joints 
(olona cloth). The vibration-damping joint 
must be screwed to the panel with self-
tapping screws, positioning the screws 
inside the border highlighted in the 
following layout avoiding that the olona 
cloth joints are over stretched (point 1);

• connect a earth wire to the vibration-

damping joint to act as a jumper to 
guarantee the unipotentiality between 
the ducts and the recovery unit;  

•  place the supply duct with a straight 

section of at least one meter, before 
the bends, branches, etc., and make 
sure that the ductling does not have 
inclinations of the divergent sections 
greater than 7°.

Hydraulic connections
of the condensate drain

The condensate drain pan is provided 
with a 1” diameter threaded discharge 
pipe G UNI 338.
The drainage system should feature an 
adequately sized trap to:
•  freely discharge the condensate;
•  prevent the undesired entry of air into 

the vacuum systems;

•  prevent the undesired exit of air from 

the pressure systems;

•  prevent the infiltration of odours or 

insects.

In the lower part of the syphon must 
have a bleed cap or must anyway permit 
Aermec dismantling for its cleaning.
Rules to follow for the scaling and 
production of the syphon are given 
below.

fig.10

fig.11

H1 = 2P 
H2= H1 / 2 

where P is the pressure 
expressed in mm of the water 
column (1 mm c.a. = 9.81 
Pa).

Olona cloth 

vibration-damping joint 

Electrical earth wire 
not supplied

Supply 
duct 

Minimum length 1 m

max divergence 7°

MMMAX

H1

H3

H2

P

neg.

H1

H3

H2

P

pos.