By-Pass For De-Frosting Or Free-Cooling - Lennox MiniAir 10 Installation, Operating And Maintenance Manual

11.7 By-pass for de-frosting or free-cooling

For MINIAIR+ 03-06-10-14-19-25-30 models the structure has a presplitting allowing defrosting by-pass or free cooling to
be carried out.
Free cooling. When the external temperature is close to the internal temperature the recuperator may be bypassed
inserting renewal air directly in the room.
It is possible to do this by opening damper B and at the same time closing damper A.
Defrosting. In very cold periods the room delivery air could frost blocking the passage through the recuperator. Installing
an antifreeze thermostat (optional) combined with the bypass system indicated in the figure unit defrosting is obtained. In
fact opening gate A and closing gate B the recuperator is bypassed with cold air and the flow of hot air coming from the
room air delivery allows a rapid defrosting of the recuperator itself which can therefore return to operation in normal
conditions.
ESTERNO
OUTSIDE
Aspirazione
aria di rinnovo
Air intake
renewal
Espulsione
aria viziata
Air blow-out
12 – T
S
ECTION RANSPORTATION
12.1 Packing
The recuperators are placed in carton boxes that must remain intact until the moment of installation.
The materials that are not required for technical motives are supplied in fitted packing fixed externally and internally to
the unit.
IOM / MINIAIR-0507
ESTERNO
Serranda A
OUTSIDE
Aspirazione
aria di rinnovo
Air intake
renewal
Espulsione
aria viziata
Air blow-out
Aspirazione
aria free cooling
Air free cooling
Serranda C
Serranda D
Serranda E
Schema 1
Serranda B
Schema 2
INTERNO
INSIDE
Ripresa
aria ambiente
Internal air
iduction
Mandata
aria preriscaldata
Imput pre
heated air
INTERNO
INSIDE
Ripresa
aria ambiente
Internal air
iduction
Mandata
aria preriscaldata
Imput pre
heated air
21