EFCO 8800 Series Assembly Instructions Vol.4 - Manual (Page 27)

EFCO 2009 Page 27
Series 8700 / 8800 Unitized Curtain Wall Assembly Instructions - Volume 4
Section 13 - Outside 90° Corner Captured Unit Glazing : C. Adapter and Cover Installation
4. Apply the preset thermal isolator (WC16) to the head, running the gasket continuously between the vertical mullions and the miter of the stack head at the
corner. Refer to Volume 2, page 23 of the S-8000 Unitized Curtain Wall Assembly Instructions for more information.
5. Clean the sealant contact surfaces of the mullions and gutters with an approved solvent or cleaner.
6. Apply a heavy bead of sealant to the ends of the gutters and the tops of the vertical mullions as shown in Figures 46 and 47.
7. Butt seal the mitered ends and install the SSG gutters to the frame at the head horizontal and secure with SPZ1. The gutters must butt together in the corner.
Tool a fillet bead of sealant along the back side of the gutter at the joint formed at the corner. Remove the remaining excess sealant at the mitered joint.
8. Tool the sealant at the tops of the vertical mullions as shown in Figure 48. Refer to Volume 2, page 25 of the S-8000 Unitized Curtain Wall Assembly
Instructions for more information.
Figure 45
Note! Critical seal!
The sealant must be thoroughly tooled
and blended over the adjacent surfaces
all around the sealant contact areas
shown in Figure 47. This seal occurs at
the top of each non-corner vertical
mullion.
Silicone
Sealant
WC16 Isolator
Gaskets
WC16
Silicone
Sealant
SPZ1
SPZ1
SSG Gutter
SSG Gutter
Figure 46
Figure 48 Figure 47
HEAD
SILL