11
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, ensure that the installation conditions comply with the
information given in the
SPECIFICATION
section. For type 3 valves see also
Installation conditions in
TYPE 3 VALVES
.
2.
Care must be taken during installation to prevent any risk of injury or damage.
3.
Installations must comply with all Local/National Water Supply Authority
Regulations/Bye-Laws, and building and Plumbing Regulations.
4.
The shower control should be positioned for easy access during use and
maintenance. All routine maintenance procedures can be conducted with the
shower control body in place (except for strainer and check valve access on the
Exact-3 z). For all models, allow a minimum 150 mm top and bottom clearance to
enable removal of the Thermostatic and Flow cartridges from the shower control
body during maintenance.
5.
Conveniently situated isolating valves must be provided for maintenance.
6.
The use of supply-line or zone strainers will reduce the need to remove debris at
each shower control point. The recommended minimum mesh aperture dimension
for such strainers is 0.5 mm.
7.
Inlet pressure tappings which allow measurement of the inlet pressures to the
mixing valve under running conditions are particularly recommended for healthcare
applications with Type 3 valves.
8.
Pipework must be rigidly supported. The mixed water outlet piping should not
exceed 2 m and the overall length from the hot water circuit to the discharge
point should not exceed 5 m.
9.
Pipework dead-legs should be kept to a minimum.
10.
Supply pipework layout should be arranged to minimise the effect of other outlet
usage upon the dynamic pressures at the shower control inlets.
11.
Inlet threaded joint connections should be made with PTFE tape or liquid sealant.
Do not use oil-based, non-setting jointing compounds.
12. To eliminate pipe debris it is essential that supply pipes are thoroughly
flushed through before connection to the shower control.