Step 3: Construction sealant application (Sikabond or equivalent)
In order to avoid leakage between the frame and the wall, construction
sealant shall be applied on the back side of the frame:
•
Remove the channel penstock from the wall (first remove the nuts of the anchor bolts).
•
Apply construction sealant all around the perimeter of the frame, where it will be in
contact with the wall.
Sikabond (200 ml/m) or equivalent construction sealant shall be used (See figure 14).
Be sure not to get sealant on the seals, guides, and/or stem, as this may cause leakage
damage.
•
Re-install the penstock on the wall and tighten both anchor bolts.
Step 4: Final installation of channel penstock
•
Drill and install the rest of the anchor bolts (see Figure 15).
CAUTION!:
If the channel penstock is not completely in contact with the wall, do not over-tighten the anchor bolts. Over tightening may
bend or distort the frame. If the wall flatness and levelness is according to the specified standards, the construction sealant
will fill in the remaining void (see Figure 16).
•
Apply construction sealant around the frame in order to fill in any existing gap between the wall and the frame (this step is
only for esthetics). Wipe away the excess sealant to leave a smooth finish.
Page 8/12
MI ChannelPenstock772 rev AB August 2014 GB
INSTALLATION & MAINTENANCE INSTRUCTIONS - ORIGINAL VERSION
AVK CHANNEL PENSTOCKS
SERIES 772/71
Construction Sealant
(Sikabond 200ml/m)
Back Side of Frame
(side in contact with the wall)
Void
Do not overtighten
anchor bolt
Concrete
wall
Figure 16
Figure 15
Figure 14
