IOM / Rooftop Smart and Linéa™ Range - Page 23
A
C
D
B
INS
INS
INS
INS
INST
T
T
T
TALLA
ALLA
ALLA
ALLA
ALLATION
TION
TION
TION
TION
CURBING AND FLASHING
1. Outside of frame should be insulated with rigid
type insulation, preferably 51 mm thick. Do not
use combustible material for filling around frame.
2. Counter-flash and seal around frame as shown
in figure 26.
3. When bottom power service is used, cut counter
flashing for conduit clearance and make a
watertight seal around conduit section passing
through counter flashing (see figure 27).
IMPORTANT : If a poured roof is used, such as
concrete, be sure inside of mounting frame is
adequately braced to ensure a square and level frame.
4. The roof mounting frame is equipped with two 7/
8" knockouts. One knockout is located below the
unit power entry. The other knockout is located
below the unit low voltage power entry. These
knockouts allow low and high voltage power to
be brought from beneath unit. The knockout below
the unit power entry may need to be enlarged
depending on unit power requirements and the
conduit size required.
MISCELLANEOUS
1. Where pipes and electrical conduit extend through
roof, flashing must conform to local roofing stan-
dards.
2. Roof walkways should be provided around
equipment to facilitate servicing.
SECURING FRAME
To assure proper mating with units, it is mandatory the
mounting frame be squared to roof structure as follows :
1. With frame situated level in desired location on roof
trusses, tack weld corner of frame.
2. Measure frame diagonally from corner to corner as
shown in figure 25. These dimensions must be equal
for frame to be square.
3. It is extremely important to sight frame from all corners
to make certain frame is not twisted across top side.
Shim frame under any low sides.
Maximum slope tolerance is 5 mm per linear metre in
any direction.
4. After frame has been squared, straightened and
shimmed, weld or attach frame securely to roof deck.
NOTE : Securely fasten roof frame to roof per local codes.
Figure 25
SQUARING FRAME
Frame is square when length from corner A to B is equal
to lenght from corner C to D.
Figure 27
51
356
Figure 26
UNIT BASE RAIL
Counter flashing (*)
Cant strip (*)
Roof material
Fiberglass
insulation
Nailer strip
Rigid insulation
Roof mounting
frame
UNIT BASE
BOTTOM
Nailer strip
Counter flashing
(field furnished)
Cant strip
(field furnished)
Roof material
(field furnished)
Fiberglass insulation
Rigid insulation
(field furnished)
Mounting frame
UNIT BASE
Conduit passing through
counter flashing
Counter flashing
(field furnished)
Bend up
Watertight seal
around conduit
Rigid insulation
(field furnished)
