202-INST-US-001 v1.0
–
11 Dec 2020
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Page 7 of 25
4.
The switch used to control the operation of the Chain Actuated Pitchvent is a two button wall mounted control switch. This
switch will allow you to operate and stop at any position between the fully open and closed positions. This switch also contains
a tri-color LED to display the product status to the user. The correct control switch is supplied in the installation kit and must
be installed to avoid invalidating the warranty. If required, this switch can be installed in a maintenance area and another switch
of a
retractive single pole double throw (SPDT, ‘on
-off-
on’, latching off) type can be parallel wired for regular use. Using a SPDT
switch that only latches ‘on
-
on’ can seize the control board and therefore should not be used.
5.
The Chain Actuated Pitchvent also requires a 5A fused double pole single throw (DPST) type switch (not supplied). Combined
with disconnecting the battery backup (if specified), installing this switch as per the wiring diagram will allow the control board
to be reset in the event of a fault (for more information on faults and troubleshooting see the operation and maintenance
manual).
6.
The supporting structure must already be in place for the product. The dimensioning of the product will have taken into
consideration the dimensions of the supporting structure including all weathering. More information about supporting
structure construction can be found i
n Glazing Vision’s sales drawings.
Please note that a minimum distance of
4”
clearance
between the supporting structure and any surrounding structures must be left on all sides. Sufficient room for installation
(including weathering) and maintenance must also be allowed for.
7.
It is important to consider the type of tile or other roof finish to be used. The opening in the roof should ideally be positioned
so that you get a full tile at the top and at the bottom of the product, avoiding the need to cut tiles down.
8.
It is important to ensure that the area of installation is suitably prepared. The area surrounding the supporting structure should
be clear to provide safe access during the installation works. It will be necessary to work on the outside and therefore suitable
provisions should be made for safe handling of the product, including all relevant personal protective equipment (PPE) and
safety systems for working at heights.
9.
Before starting installation, Glazing Vision advises that the physical supporting structure dimensions are cross-checked with
those given for the order, to ensure the product will fit. The supporting structure will need to be within ± 3/8
”
of the ordered size
(measured across the flats). The top surface of the supporting structure should be flat without undulations greater than ±
1/16”
.
Also check the diagonals to ensure that the supporting structure has been constructed square. The supporting structure must
be weathered as per the sales drawings. If using any metallic waterproofing material, take care when applying it to the
product/supporting structure, as if done incorrectly it can cause a thermal bridge which can lead to internal condensation and
invalidate the product warranty.
It is important that the supporting structure is made to the pitch specified on the order confirmation. Failure to comply
with this may result in product failure due to the overloading of its mechanisms. Glazing Vision accepts no responsibility
for failures as a result of incorrectly pitched products.
10.
These products can be very heavy. Glazing Vision strongly recommends that a structural engineer is consulted when designing
the structure(s) that will support the product and the surrounding structure. Nothing in this manual
or on Glazing Vision’s sales
drawings constitutes a structural proposal.
11.
Preparation of the roof prior to installation will vary depending on roof type and roofing materials. A few common scenarios
are included in this manual. Please follow the applicable steps for your configuration. Glazing Vision strongly recommends that
a ‘dry run’ (without any silicone
or butyl) is completed before committing to the final installation.
Sales Drawings
Sales drawings for the Pitchvent can be obtained by downloading th
em from Glazing Vision’s website
(www.glazingvision.com/technical-downloads) or by contacting Glazing Vision.
Sales drawings should accompany this installation manual. If you do not have them then do not continue the installation
without them.
