EFCO WV410 - Manual (Page 20)

EFCO CORPORATION 2/2014 PART NO. Y007 Page 20 of 21
WV410 WINDOW - INSTALLATION INSTRUCTIONS
Section IX – Casement Lift Block Installation
Due to the weight of the vent, lift blocks are used to elevate the vent upon closing. Elevating the
vent aligns the gaskets and cam locks to the proper location. All WV410 casement vents receive
one (1) or two (2) pairs of lift blocks, depending on the vent size. Casement vents over 30” wide
will receive two (2) pairs and vents under 30” will receive one (1) pair. The blocks are designed
to be located directly over each other. The vent portion of the lift block pair will be preinstalled
by EFCO.
Step 1
Locate the center line of the lift block HB64 as required per the vent size. See Figure 24. Check
the lift block location mounted on the vent for correct center line.
Step 2
Drill (2) .136” diameter (No. 29 drill) holes per block through the storefront framing shown in
Figure 24, and install with (2) SFZ5 fasteners per lift block.
Step 3
The operable vent may now be installed. Reinstall the operable vent to the WV410 frame. Be
sure to mount the vent and hinges in the same locations preinstalled by EFCO. See section IX on
Page 20.
* Drawings on this page are not to scale.