11
Retrofitting a TX controller
A
TX
controller
can
be
retrofitted to a TX 75A inside the
unit, such that the control panel
is always accessible without
having to mount it on the outside
of the wall.
The controller is fitted in the
holder located under the lower
cover. The cover is retained by 4
screws, one in each corner. The
holder can be removed by
unscrewing the 4 middle screws.
Secure the controller to the holder using 2 screws from the back.
The cable can be shortened if necessary. Note wire colours and their positions to ensure correct re-
installation. Pass the cable through the rubber grommet in the cover and through the cable holders
along the inside of the unit on the left – and fit the SUB-D socket in the socket on the partition plate
at the top of the unit.
Screw the holder securely onto the cover, which is then fitted in the unit.
If the unit has a CO
2
sensor fitted, secure it again using the screw in the bottom right corner.
