EFCO 8750XD User Manual

Page 40

EFCO 2012

Page 40

Series 8750XD Unitized Curtain Wall Installation Instructions

2. When

re-glazing an opening or openings at a captured unit, follow these instructions:

a. Using an approved solvent or cleaner, clean the glazing surfaces of all oils and other contaminants. The sealant manufacturer’s

preparation and application instructions should be followed exactly. Fresh sealant will adhere to cured sealant without primer. Primer may be
necessary if the sealant has been completely removed.

b. Replace WC18 preset spacer gasket with new gasket around the entire opening. Ensure the gaskets are firmly butted together in the corners.
c. Run a bead of sealant around the WC18 gasket as shown below. The joint must be filled with sealant in excess so that it will fill all voids between the

glazing and the WC18 gasket when the glazing is put in place. Tool the sealant into a beveled shape as shown below prior to setting the glazing.
Ensure no voids or air bubbles are present in the sealant. The glazing must be set within 10 minutes or before the sealant begins to skin over.

d. Carefully insert new setting blocks in the locations as noted in the approved shop drawings.
e. Clean the new glass or panel and set it in place, centered in the opening, setting on the setting blocks. Do not contaminate the sealant contact

surfaces of the glazing during handling. Press the glazing firmly against the spacer gaskets. Avoid sliding the glazing around on the spacers, as this
can force sealant into visible areas seen from the interior.

Apply temporary retainers with wedge gaskets (WC22) at quarter points of the D.L.O. on all four sides of the opening.

g. Tool the sealant around the perimeter of the glazing, packing the sealant into the joint, to ensure any voids or air bubbles in the sealant are

eliminated. Carefully relocate the glazing retainers to expose inaccessible areas behind the retainer, and tool the sealant at those areas. Pay
particular attention at the corners of the glazing.

h. Remove and replace the temporary retainers with a cover and gasket (WC22) join one side of the glazing at a time. Replace one side, and then

replace the opposing side next. Replace the remaining sides last. If the exterior gaskets were damaged when they were removed, replace them with
new gaskets.

Section 14 - Deglaze / Re-glaze Procedures - Captured System

Note:
Only silicone sealants which
have been developed and
tested specifically for
structural glazing
applications should be used
for re-glazing purposes.

Apply new WC18

spacer gaskets.

WC18 Gasket

High modulus
silicone sealant.

Apply sealant

around the opening

and tool as shown.

Set the glazing in

place, pressing the

glazing firmly against

the spacer gaskets.

Apply temporary

retainers with wedge

gaskets at quarter

points of the D.L.O.

WC22 Gasket

Tool the sealant
around the perimeter
of the glazing.

Remove and replace the
temporary retainers with a
cover and gasket.

WC22 Gasket

Tool the sealant
around the perimeter
of the glazing.

Remove and replace the
temporary retainers with a
cover and gasket.

Figure 98

Figure 99