GV Standard Xvent Installation Manual
405-INST-001 - v1.0 – 14 Oct 19
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Glazing Vision Ltd, Saw Mills Road, Diss, Norfolk, IP22 4RG
Registered in England. No. 2987024 VAT No. 637 7241 26
01379 658300 [email protected]
FM596998
EMS613885
Chain or strap
Top brace
Bottom brace
Figure 9 – Support legs
Option 2 – Chain or Strap
This option can be used when there is not enough space for the legs to sit – eg. if the lid overhangs
the edge of the building. With the override screws removed, the two brace brackets should be fitted –
one to the lid, and one to the base (it may be necessary to remove the treadplate). Using a chain or
strap, connect the two braces as shown in figure 10 to allow the Xvent to be safely worked on. Be
careful as the lid may be very heavy.
Figure 10 – Chain or strap
Electrical Installation Checks
The following instructions should be followed when setting up the mechanisms for the first time or after
replacing them due to repair.
With the lid disconnected and secured in the open position some checks are required to proceed. First
check that the unit is receiving the correct power from the power supply unit (PSU). Use a multimeter
to check the supply voltage by disconnecting the connection to the batteries and placing the multimeter
probes across them. You should get a reading of 27.2v DC. If the reading is higher or lower than this
figure, then the output from the PSU should be adjusted accordingly. Voltage adjustment is via a screw
potentiometer accessed through the front cover (remove small plastic plug first). The PSU is external
to the Xvent and can be mounted some way from the product, possibly resulting in a slight volt drop.
This is a common reason for a slightly lower voltage at the battery terminals and requires adjusting.
27.2v DC must be the reading at the Xvent to ensure the batteries are given sufficient charge. Ensure
that the batteries are re-connected.
After confirming that the PSU is correct the fire alarm connection should be tested. Ensure that the
Xvent has been connected to the fire switch (panel, break glass etc.) which will provide a normally
closed safety circuit.