10
COMMISSIONING AND ANNUAL MAINTENANCE TESTING
On commissioning carry out the following checks and tests:
•
All the pipe work has been flushed through before fitting the valve
•
The valve you have purchased matches the installation
•
The supply pressures and temperatures are checked and all are in the range
specified in the instructions
•
The isolation valves and strainers are fitted and clean of any unwanted material and do
not restrict flow
Ensure both isolation valves are fully open. Turn the temperature control to cold and turn the
flow on. Check the temperature is at the required minimum. Rotate the temperature controller
gradually until it reaches the preset stop let it flow until the hot water has reached the valve and
the temperature has stabilized. Check the temperature is 38˚C =/-2˚C. This is the valves factory
preset.
Note:
If your temperature is not 38˚C the following operation should only be carried
out by a competent TMV engineer. To adjust the temperature at the stop to 38˚C,
this can be achieve by the following;
Firstly position the temperature control knob at the stop. Remove the temperature control knob
by undoing the grub screw. Then turning the splined shaft clockwise to decrease the temperature
(colder) or anti-clockwise to increase the temperature (hotter) when you have achieved a
temperature of 38˚C, re-assemble the temperature control knob.
Override the stop by pressing the button and rotate to maximum being careful to avoid scalding.
Measure the temperature.
The valve should then be checked to confirm the water isolation performs correctly. Run the
valve at the 38˚C stop position. Check the water temperature. Turn off the feed of cold water
using the isolation valve. The water flow should fall to a very low flow, (possibly only a drip) after
a few seconds. Collect the water after 5 seconds and 30 seconds and measure the temperature
it should be below 46˚C +/- 2˚C . Turn on the cold water again and it should return after a few
seconds to stabilise to 38˚C +/- 2˚C.
Adjustment of the temperature settings is only to be carried out by a competent TMV engineer
as it is a technically difficult operation in which the valve can be easily broken. It can be done
by removing the handle on the temperature controller, (noting carefully the assembly of the
components), rotating the internal stops a few degrees in the required direction and then
reassembling. All the commissioning checks should be redone again to ensure it now meets
the required specification before using the shower.
