8
INSTALLATION
General
Installation must be carried out in accordance with these instructions, and
must be conducted by designated, qualified and competent personnel.
1.
Before commencing, assure that the installation conditions comply with the
information given in the
SPECIFICATION
section.
2.
Care must be taken during installation to prevent any risk of injury or damage.
3.
Conveniently situated isolating valves must be provided for maintenance.
4.
Pipework dead-legs should be kept to a minimum.
5.
Inlet threaded joint connections should be made with PTFE tape or liquid sealant.
Do not use oil-based, non-setting jointing compounds.
6.
To eliminate pipe debris it is essential that supply pipes are thoroughly
flushed through before connection to the TF31.
Procedure
(Refer to Figure 1)
1.
Drill a hole through the wall in the required position (22 mm dia. minimum, 28
mm dia. maximum). The hole
must
be square to the wall face.
2.
Push the actuator assembly through the hole from the front of the wall, having
first made sure that the 'O' seal is correctly installed.
3.
Firmly fix the actuator assembly into the wall using the 1/2" backnut supplied
(ensuring that the ‘O’ seal is retained in its groove), and secure it with the first
locknut.
4.
Place the plastic guide over the hexagonal end of the push rod so that the rod
is held in place within the threaded tube of the actuator assembly.
5.
Screw the second locknut loosely up to the first, and then screw the union nut
assembly tightly onto the end of the actuator assembly. Unscrew the second
locknut until it is tight against the union nut assembly.
Note!
The plastic guide should rest flush within the hexagonal hole in the union
nut assembly. If the plastic guide rests a little way short of this position, remove
the plastic guide and insert sufficient packing inside it to ensure that it will rest
in the correct position when installed.
6.
Screw the valve mounting adaptor tightly onto the timed flow valve. The hexagonal
spring retaining nut on the end of the valve should be flush within the threaded
section of the adaptor nut.
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