Lennox SCA 010 Installation, Operation & Maintenance Manual page 25

INS INS INST T T T T ALLA INS INS ALLATION ALLA ALLA ALLA TION TION TION TION
SUPPLY AND RETURN PLENUM*
IMPORTANT : Plenum system must be installed before unit
is set on mounting frame. Plenums must be constructed of
galvanized steel with coated fiberglass insulation applied to
the inside. It is recommended that 13 mm thick, 48kg/m
density fiberglass insulation be used.
* : Plenum not supplied. Diagram for information only.
1
Supply air plenum*
2
Return air plenum*
1
Page 24 - IOM / Rooftop Smart and Linéa™ Range
As required
Insulated inside
of plenum
As required
2
However, if 24 kg/m
secured with mechanical fasteners. Install plenums as shown
in figure 29.
3
610
508
1
2
1
Supply air plenum*
2
Return air plenum*
3 density insulation is used, it should be
508
610
As required
2
1
Figure 28
As
required
Figure 29