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Appendix D—HeatShift System
Install Plenum Kits
(LDK1, LDK3, LDK4 & LDK9)
—see next page for LDK7 Duct Termination
Plates
1. Frame a rough opening at the desired location—see
earlier sections of this manual for allowable plenum
positions and rough frame opening sizes.
2. Install top mounting bracket(s) to the plenum using
screws provided (use the short sheet metal screws
provided otherwise the screw tails (ends) will
interfere with the
ȴ
nishing frame when installed).
3. Install the plenum(s) into the rough frame opening
maintaining minimum clearances to combustibles
as listed—see Rough Frame Openings. Fix the ple-
num to the framing using nails or screws through
the top mounting bracket.
Note that the mount-
ing brackets are not intended to carry the weight
of the plenum and pipes. Provide support to the
underside of the plenum and ensure the plenum
is level and its outlet is not distorted—see Framing
and Clearances.
Use metal strapping (all-round, not
supplied) as required to further secure the plenum
to framing.
4. Attach one section of UL-181, Class 1 approved air
duct to each of the collars and secure it with gear
clamps provided.
DO NOT SPLICE DUCTS!
5. Attach the top of the pipe sections to the plenum
securing them with the gear clamps provided. An
upward slope must be maintained in horizontal sec-
tions of pipes for proper convection. Use straps as
necessary to maintain the pipes positions. Support
horizontal sections every 24 inches.
6. Paint the inside surfaces of the plenum using high-
temperature
ȵ
at black spray paint for installations
where the inside of the plenums may be visible.
Note:
The
ȵ
anges of the white
ȴ
nishing frame (when
used) will insert approximately 1-1/4” into the ple-
num covering the shiny sheet metal.
7. Install the
ȴ
nishing frame or louver to the plenum
after the wall
ȴ
nish is completed:
LDK1, LDK4, LDK9:
Use the LDK2, LDK5 or LDK10
depending of the length of the plenum.
LDK3:
Use the grilles provided with the kit.
Note:
The frame/louver are
ȴ
nished white but may
be painted another color if desired; use high tem-
perature paint (250ºF). You may also
ȴ
nish up to the
perimeter of the plenum opening with your material
of choice and not use the frame or louver. Do not
ȴ
nish over any of the opening in the plenum outlet.
8. Continue with the
ȴ
replace installation.
