5
3 - POSSIBLE TYPES OF ASSEMBLIES
Depending on the indoor air
fl
ow direction
B1 assembly
Standard
B2 assembly
Economizer, 2 dampers:
fresh air damper
interlocked with return
damper
BP assembly
Plug-fan in return section
BA assembly
Plug-fan in return section
+
Cooling recovery circuit
(active recovery)
B3 assembly (upon request)
Economizer, 3 dampers:
fresh air damper and
exhaust air damper
R
S
S’
R’
R’’
S’’
BW assembly
Plug-fan in return section
+
Heat recovery wheel
module (passive recovery)
BT assembly
Return top box with
plug-fan or centrifugal fan
BB assembly
Return top box with plug-
fan or centrifugal fan
+
Cooling recovery circuit
(active recovery)
BL assembly (upon request)
Return top box with plug-
fan or centrifugal fan
+
Heat recovery wheel
module (passive recovery)
R
S
S’
R’
R’’
S’’
F
S’
R
S
F
E
R
S
F
E
S’
R
S
F
E
S’
R
S
F
E
S’
R’
S
E
F
S’
R’
S
E
F
S’
F
E
R’
S
S’
Indoor air
fl
ow direction
0
Lower supply and lower return
3
Lateral supply and lateral return
6
Upper supply and lateral return
1
Lateral supply and lower return
4
Upper supply and lower return
7
Lower supply and upper return
2
Lower supply and lateral return
5
Lateral supply and upper return
8
Upper supply and upper return
Legend
S
Lower air supply
R
Lower air return
S’
Lateral air supply
R’
Lateral air return
S’’
Upper air supply
R’’
Upper air return
F
Fresh air intake
E
Exhaust air outlet
Note: only one of the three possible options (lower, lateral or upper) can
be selected for both, supply and return.
Summary of Contents for 50FC Series
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