INSTALLATION AND OPERATING INSTRUCTIONS
1. Your automatic window opener is not suitable for use where
temperatures will exceed 50C/122F.
2. Ensure that your greenhouse window is able to open and is not
obstructed otherwise damage could occur.
A. Maximum window opening approximately
B. Maximum opening at 30C/86F depen
ding on adjustment and load.
C. Suitable for greenhouse vents weighing up to
7 kg/15 lb.
D. Your window opener can be adjusted to
open at temperatures in the range 15'-25C/
See fig. 1.
2. Cylinder housing
3. Arm B
4. Arm A
5. Push rods
6. Frame bracket
7. Window bracket 8. Clamps
Lubricate all movable parts with a light oil after fitting, each
spring and as required during the summer. Apply petroleum jelly to
the cylinder thread occasionally.
It is recommended that your window opener - or at least the cylinder
- is removed from your greenhouse for the winter. Store it in a dry
place and do not forget to lubricate particularly the piston rod
before remounting in the spring. Check that the piston rod moves
Your automatic vent control is guaranteed for one year provided that
it has been fitted and maintained in accordance with the
1. Check that the greenhouse window opens freely and is not
Remove existing casement stays and arms from the window and frame.
2. Loosely fit a clamp (8) to the window bracket (7) using two of
the screws supplied, see fig. 2. On wooden greenhouses the brackets
can be screwed directly on to the woodwork, see fig. 3.
3. Choose the most suitable pair of holes and loosely fit the other
clamp to the frame bracket (6). Ensure that the upper edge of the
frame bracket is as close to the edge of the window frame as
possible. See examples in fig. 3.
4. Now measure the distance that your window will open.
A. If the window will open at least 42 cm/ 16'/z ":
Fit the opener as delivered to you.
B. If the window will only open between 30 and 42 cm/12" and 16":
Unscrew the screw keeping the push rods (5) and the arms (4)
together. Move the assembly with the arms from hole A to hole B in
the push rods as shown in fig. 4. Screw in the screw again.
5. Fit the frame bracket in the middle of the window sill, see fig.
6. Fit the window bracket to the window frame just above the frame
bracket. The window must be in the closed position.
7. Open the window sufficiently to allow you to screw the cylinder
into the cylinder housing. Screw in the cylinder until the thread is
equal length on both sides of the housing and release the window.
It is recommended that the vent control is adjusted when the
temperature in the greenhouse is constant as it will take some time
before it has responded completely to changes in temperature. In
order that your window opener should start opening the window at a
different temperature, adjustment can be made by turning the
Clockwise to achieve an earlier/higher opening.
Anticlockwise to achieve a later/lower opening.
One complete turn corresponds to app. 0,5'C/IF. -You should note
that the temperature in your greenhouse may vary considerably, also
at the individual windows.