Lennox GCS16 Series

Page 42
B-RMF16 Mounting Frame
FIGURE 42
RMF16 MOUNTING FRAME
When installing a GCS16 unit on a combustible surface for
downflow discharge applications, the Lennox RMF16 roof
mounting frame (figure 42) is required. Otherwise, the
RMF16 is recommended but not required. The GCS16, if
not mounted on a flat (roof) surface, MUST be supported
under all edges and under the middle of the unit to prevent
sagging. The GCS16 MUST be mounted level within 1/16"
per linear foot in any direction.
The assembled RMF16 mounting frame is shown in figure
42. Refer to the RMF16 installation instructions for details
of proper assembly and mounting. The roof mounting
frame MUST be squared to the roof before mounting. Ple
num system MUST be installed before the unit is set on the
mounting frame. Refer to the RMF16 installation instruc
tions for proper plenum construction.
FIGURE 43
TYPICAL FIELD FABRICATED
MOUNTING FRAME
UNIT
MOUNTING
FRAME
Many types of roof framing or supports can be used to
mount the GCS16 unit, depending upon different roof
structures. A typical field fabricated roof mounting frame is
shown in figure 43.
C-Economizers
1-Application
REMD16(M) and EMDH16(M) economizers can
only be applied to GCS16 commercial units.
GCS16R (residential) units are not equipped with
the necessary wiring hardware and therefore can
not accept the economizers.
GCS16H units are not designed to accept econo
mizers and are not equipped with the necessary wir
ing. However, a REMD16M or REMD16 can be field
applied to a GCS16H if necessary by using a
RDE16-41 downturn transition. This application is
covered in more detail later in this section.
A total of eight different economizers are available
for GCS16 commercial units. Table 22 describes the
economizers which are available.
TABLE 22
GCS16 ECONOMIZERS (2-5 TON UNITS)
Economizer
Unit
Matchup
Type
REMD16-41
REMD16M-41
REMD16-65
REMD16M-65
EMDH16-41
EMDH16M-41
EMDH16-65
EMDH16M-65
Three Position Downflow
Modulating Downflow
Three Position Downflow
Modulating Downflow
GCS16-510
GCS16-650
GCS16-510
GCS16-650
Three Position Horizontal
Modulating Horizontal
GCS16-410
GCS16-410
Three Position Horizontal
GCS16-510
GCS16-650
Modulating Horizontal
GCS16-510
GCS16-650
GCS16H-261
GCS16H-311
GCS16-410
GCS16H-261
GCS16H-311
GCS16-410