Page 38
VII-ACCESSORIES
The accessories section describes the application of
most of the optional accessories which can be factory- or
A-C1/T1CURB
When installing the LGM units on a combustible surface for
14-inch, 18 inch or 24-inch height roof mounting frame is
used. The roof mounting frames are recommended in all
other applications but not required. If the LGM units are
-
ported under all edges and under the middle of the unit to
prevent sagging. The units MUST be mounted level within
-
fer to the roof mounting frame installation instructions for
details of proper assembly and mounting. The roof mount-
ing frame MUST be squared to the roof and level before
mounting. Plenum system MUST be installed before the
unit is set on the mounting frame. Typical roof curbing and
frame installation instructions for proper plenum construc-
tion and attachment.
B-Transitions
Optional supply/return transitions T1TRAN10AN1 is avail-
T1TRAN20N-1 is available for the 6 ton units utilizing
optional T1CURB roof mounting frames. Transition must
be installed in the C1/T1CURB mounting frame before
mounting the unit to the frame. Refer to the manufactur-
er’s instructions included with the transition for detailed
installation procedures.
C-Outdoor Air Dampers
E1DAMP11A-1 manually operated outdoor air damp-
er and E1DAMP21A-1 motorized outdoor air damper is
E1DAMP11AT-1 manually operated outdoor air damp-
er and E1DAMP21AT-1 motorized outdoor air damper
point to bring outside air into the building anytime the
blower is operating.The motorized damper opens when
the blower is operating and the thermostat is sending an
occupied signal to the Unit Controller. If the thermostat
signal is unoccupied, the motorized damper will not open.
be cleaned with water and a mild detergent. It should be
sprayed with Filter Handicoater when dry prior to re-instal-
lation. Filter Handicoater is R.P. Products coating no. 418
ASSEMBLED ROOF MOUNTING FRAME
FIGURE 28
ROOF
MOUNTING FRAME
(Extends around entire
FIBERGLASS
INSULATION
(Furnished)
COUNTER FLASHING
(Field Supplied)
UNIT BASE
BOTTOM
RIGID INSULATION
(Field Supplied)
ROOFING
MATERIAL
CANT STRIP
(Field Supplied)
NAILER STRIP
(Furnished)
UNIT BASE
RAIL
FIGURE 29
SLIDE DAMPERS
TO ADJUST FRESH
AIR INTAKE
MANUAL OUTDOOR AIR DAMPER
FIGURE 30
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