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Horne Engineering Ltd
MAINTENANCE
Maintenance of the TSV1-3 shower valve is essential to ensure the product continues to perform to
specification after installation, and continues to afford scald protection. Record all maintenance carried out on
the attached commissioning and maintenance record.
When cleaning the external panel and knobs, never use cleaners containing abrasives or solvents as they may
damage the chrome plating. Use only a soft cloth and soap.
The frequency of routine maintenance of the TSV1-3 internals (i.e. cleaning, descaling etc) depends largely on
the condition of the water supplies, and local knowledge will dictate suitable intervals. In addition to this the
following precautions should be observed.
Initially check the strainer baskets for debris every three months and clean if required. This period can be
increased if appropriate once the general condition and cleanliness of the water is established.
Perform a thermal shut-off test every three months, and check the maximum temperature setting. See the last
paragraph in the Commissioning Instructions for details of the thermal shut-off test and re-adjustment of the
maximum temperature setting, if required.
If the maximum water temperature rises by more than 3°C from the commissioned setting then ensure that the
strainers are clean and that the isolating valves are fully open. Test the non-return valves as described below.
If these tests do not highlight the reason for the temperature rise then follow the procedure below for
investigating failure of the thermal shut-off test.
If the TSV1-3 fails the thermal shut-off test then remove the temperature control knob and the thermostatic
cover (see installation instructions for details) and check the internal surfaces for scaling. If the TSV1-3 body
requires descaling then it should be removed from the casing to do this. All rubber parts must be removed prior
to descaling. Do not forget the slide valve seal located inside the TSV1-3 body, which should always be
replaced with a new seal after removal. Maintenance kits, which contain "O" rings and/or the thermostatic
element, are available. Smear all "O" rings with silicon grease/oil prior to installing them. Torque the TSV1-3
cover to 13 Nm (10 lbft). This is to prevent the user from inadvertently unscrewing the cover during temperature
adjustment. Do not over tighten the cover.
Replace the "O" rings every three years (A Maintenance kit with spare "O" rings is available). Smear silicon oil
on all "O" rings prior to installation. Lightly smear the outside diameter of the slide valve with silicon oil prior to
installation.
Replace the thermostatic element and slide valve assembly at least once every 6 years in all TSV1-3 valves, or
more often if problems are experienced or in installations where the water is aggressive.
The on/off mechanism uses a ½ " washer, which should be replaced when it leaks. Remove the cosmetic trim
and unscrew the on/off assembly. The washer is retained by a small nut. Do not over tighten this nut. Ensure
the on/off assembly is torqued down to 13 Nm (10 lbft) to prevent the user from inadvertently unscrewing the
assembly during flow control. Do not over tighten the assembly.
The automatic diverting valve diverts water to the handset whenever the handset is attached. Flow to the
handset is stopped by a check valve when the handset is removed.
The check valves prevent cross flow between hot and cold water supplies under unequal pressure conditions,
and are designed for long life with no maintenance. Their function can be tested as follows:
To test the check valves on the hot side, shut off the hot supply and ensure the cold supply is open. Be
prepared for leakage of trapped water from the pipe and remove the strainer basket on the hot side. Any
continuing leakage evident from the strainer body is likely to be coming through the hot supply check valves
(N.B. Ensure the hot isolating valve shuts off tight or it may cause leakage here).
To test the check valves on the cold side, shut off the cold supply and ensure the hot supply is open. Be
prepared for leakage of trapped water from the pipe and remove the strainer basket on the cold side. Any
continuing leakage evident from the strainer body is likely to be coming through the cold supply check valves
(N.B. Ensure cold isolating valve shuts off tight or it may cause leakage here).
9
Issue 4 June 2016
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