Curbing And Flashing - Lennox BCK 020 Installation Operating & Maintenance Manual

INSTALLATION ON A ROOF MOUNTING FRAME
When the frame is correctly positioned. It is essential to secure the assembly with a disconnected stitched welded seam (20 to
30mm every 200mm) along the outside or by using an alternative method.
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CURBING AND FLASHING

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Before installing the equipment, make sure that seals are not
damaged and check that the unit is secured to the mounting
frame. Once in position, the bottom of the equipment must be
horizontal.
The installer must comply to local authority standards and
specifications.
2
1
Fig. 18
Outside of frame must be insulated with rigid type insulation;
We recommend a minimum of 20 mm thick insulation (2 figure
18).
Check that the insulation is continuous, counter flash and seal
around the frame as shown in (1-figure 18).
CAUTION : To be effective, the upstream must end below the
drop edge (3 - figure 18).
Where pipes and electrical conduits extend through the roof,
flashing must conform to local codes of practice.
IOM / ROOFTOP BALTIC Series - 0803 - E Page 25
Fig. 17