EFCO 8800 Series Assembly Instructions Vol.3 - Manual (Page 21)

EFCO 2009 Page 21
Series 8700 / 8800 Unitized Curtain Wall Installation Instructions - Volume 3
Section 8 - B. Inside 90° Corner Unit Frame Assembly
27. Once the stack head and sill assemblies have been attached, remove all excess sealant from areas that will be exposed to the interior.
28. Remove excess sealant from gasket reglets and areas where the isolator clips and adapters will later be inserted.
29. Using an approved solvent or cleaner, clean the sealant contact surfaces of the mitered areas of the stack head and sill assemblies.
30. Apply a generous bead of silicone sealant along the miter and at the fastener heads of the stack head and sill assemblies as shown in Figures 56 and 58.
31. Tool the sealant into all voids and reglets to make water tight. Avoid excessive sealant build-up in the stack sill where the units stack together.
Figure 55
17H1 Stack
Head Assembly
Figure 56
FM20 Unit
Lifting Lug
17H0 Stack Sill
Assembly
SFQ5 Frame
Screws
Corner Mullion
SFQ5 Frame
Screws
Corner Mullion
Butt seal the end of
the corner mullion and
the top of the angle.
17H1 Stack
Head Assembly Apply a generous bead of
sealant and tool into voids
and reglets. Cap seal fastener
heads where indicated.
17H0 Stack Sill
Assembly
Avoid excessive
sealant build-up
in this area.
Figure 58 Figure 57
Top of
Mullion
Bottom
of Mullion
Butt seal the end of
the corner mullion and
the top of the angle.
Apply a generous bead of
sealant and tool into voids
and reglets. Cap seal fastener
heads where indicated.
Cap seal
fastener head
at angle.
Cap seal
fastener head
at angle.