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13.2.- Enthalpy sensors for economiser
Applicable when requiring an economiser control system
that adapts best to the areas in which the humidity level is
important.
13.3.- Surge pressure barometric damper
To relieve excess air pressure that can be generated within
the building when an economiser or motor-driven damper
is used. It is the most economic and adequate extraction
system for installations in which return air is not ducted and
an extraction of a maximum of 25% of the total impulse air
flow is expected.
It comprises a surge pressure damper located at the return
of the unit. Includes a rain hood with a grid for protection
against birds.
When it opens, the entering outdoor air increases and the
return air flow is decreased proportionally, the pressure within
the building rises. When this pressure is greater that the at-
mospheric pressure, the damper opens, releasing excessive
pressure directly outdoors.
When the return duct connection is at the bottom of the unit,
the barometric damper assembly and rain hood are supplied
fully installed on the unit.
If the return duct connection is on the side, it must be installed
at the job site directly on the front surface of the return duct,
as close as possible to the unit (see Fig. 11).
- Fig. 11 -
Economiser with surge pressure barometric damper
OUTDOOR
AIR
RETURN
AIR
BOTTOM RETURN DUCT
DAMPER
OUTDOOR
AIR
RETURN
AIR
DAMPER
SIDE RETURN DUCT
ATTENTION
: INDICATE RETURN AIR DUCT
LOCATION WHEN PLACING THE ORDER.
Summary of Contents for D4IC-360
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Page 43: ...43 20 Wiring diagrams 20 1 Cool only models D4IC 360 D4IC 360G50 400 3 50 1 of 3 ...
Page 44: ...44 D4IC 360G50 400 3 50 2 of 3 ...
Page 45: ...45 D4IC 360G50 400 3 50 3 of 3 ...
Page 46: ...46 20 2 Cool only models D4IC 480 D4IC 480G50 400 3 50 1 of 3 ...
Page 47: ...47 D4IC 480G50 400 3 50 2 of 3 ...
Page 48: ...48 D4IC 480G50 400 3 50 3 of 3 ...
Page 49: ...49 20 3 Heat pump models B4IH 360 400 3 50 1 of 3 ...
Page 50: ...50 B4IH 360 400 3 50 2 of 3 ...
Page 51: ...51 B4IH 360 400 3 50 3 of 3 ...
Page 52: ...52 20 4 Heat pump models B4IH 480 400 3 50 1 of 3 ...
Page 53: ...53 B4IH 480 400 3 50 2 of 3 ...
Page 54: ...54 B4IH 480 400 3 50 3 of 3 ...
Page 55: ...55 20 5 Cool only gas heating models D4IG 360 400 3 50 1 of 4 ...
Page 56: ...56 D4IG 360 400 3 50 2 of 4 ...
Page 57: ...57 D4IG 360 400 3 50 3 of 4 ...
Page 58: ...58 D4IG 360 400 3 50 4 of 4 ...
Page 59: ...59 20 5 Cool only gas heating models D4IG 480 400 3 50 1 of 4 ...
Page 60: ...60 D4IG 480 400 3 50 2 of 4 ...
Page 61: ...61 D4IG 480 400 3 50 3 of 4 ...
Page 62: ...62 D4IG 480 400 3 50 4 of 4 ...
Page 63: ...63 Configuration of switches Data and dimensions are subject to change without prior notice ...
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