Revised 05/11/2021 22' Install Manual 10-W1 Vent Installation Stage 2
opener is acting in a straight line, from side to side, not sideways. Slide the slotted bracket up and down until the
bend end of the opener (the end hanging down) is about 1” to 2” (two fingers worth) from the vent.
Mark for the two holes in the slots and drill through the vent glazing with a 3/16” bit. Make sure you drill
perpendicular to the vent as it will be difficult to screw the two long screws into the small backer plate if they are at
an angle. Place the two long screws provided with the opener kit through the slots in the bracket, through the
holes in the vent and into the holes in the small backer plate placed on the outside of the vent. Use a wrench and
a screwdriver to tighten these screws so that at no point does the opener mechanism bind on the vent itself. Turn
the “T” piece that the piston end goes through by 180º so that the piston goes through the top of the “T”. Line up
the hole in the piston with the hole nearer the piston and insert the small hair pin with the rounded end up. Screw
the tube into the collar until half the amount of thread is used.
Screwing the black piston in all the way opens the vent to its maximum. Unscrewing the piston will keep the vents
from fully opening which is an advantage in cooler weather. To disable the Univent openers totally (recommended
for areas that receive snow), squeeze the two arms together and remove from the opener bracket on the
crossbar. If you disable the openers, it is advisable to re-tie the restraining cords so the vents will not “fly” open.
When installing a Bayliss opener, the first step is to make sure there are two holes 3/16” diameter 2-1/8” apart in
the vent crossbar. The crossbar should come pre-drilled. See “Bayliss Opener Installation” Video 10-V3. Mount
the opener to the crossbar, using the short #10-32 bolts provided in the kit, screwing through the holes in the
crossbar into the nuts provided. Fix the vent opener leg without the actuating tube (silver piston) onto the crossbar
(see video) and place the other end of the actuating arm against the vent glazing making sure the pressure of the
opener is acting in a straight line, side to side, not sideways. The Bayliss Hydraulicheck opener is designed to
open slowly, so apply firm but constant pressure. Slide the slotted bracket up and down until the bend end of the
opener (the end hanging down) is about 1” to 2” (two fingers worth) from the vent. Mark two holes through the
slotted bracket and drill perpendicular through the vent glazing with a 3/16” bit. It is easier to have an assistant on
the outside ready to put the short angle backing plate and the nuts on the long 1-1/4” x #10-32 bolts that are used
to secure the Bayliss vent opener to the vent glazing. Use a wrench and screwdriver to tighten these screws so
that at no point does the actuator mechanism bind on the vent itself.
Take the knurled adjuster screw and slip it over the piston rod. Open the vent with one hand and screw the
adjuster in until the unit holds the vent open 1/8” when you let go. If you wish for the vent to open at lower
temperatures, simply screw the adjuster in further and vice versa for a higher temperature. If you wish to totally
disable the Bayliss opener simply back out the knurled adjuster screw from the unit. Remember to place it in a
safe and ‘memorable’ place.
Once the openers have been installed, it is necessary to re-tie all the restraining cords. At this stage the purpose
of the restraining cords is to prevent a vent from being ripped off in windy conditions. With the bottom “E” vents,
open the vent to the maximum opening that the vent opener will allow. Then, with one end of the cord knotted to
the eyebolt, knot the other end of the cord to the screw eye so that the cord is tight. The same applies to the two
“A” top vents. The exception is that they use the longer cord that goes through the eyebolt and is attached to two
screw eyes, one on each leg of the vent frame. With the vent at its maximum opening, knot the end of one end of
the cord to one of the screw eyes so that it is tight. Repeat for the other cord end.
