Watts Industries ULTRAMIX TX91 Montage page 7

3 - RUNNING ANOMALIES
Carefully check that the anomaly is due to the thermostatic mixing valve.
Stated anomalies
L
- The water does not run with the desired temperature.
L
- The mixed water runs, but insufficiently.
L
- By installation of a new thermostatic mixing valve :
only hot or cold water runs.
L
- The mixed water temperature follows the position
of the knob but with some discrepancy.
L
- The mixed water does not come out of the thermostatic
mixing valve or only in an extreme knob position.
L
- The mixed water runs by jerks and the flow is low,
except for extreme temperatures.
4 - MAINTENANCE
4 - 1 R
OUTINE MAINTENANCE
4 - 1 - 1 C
HECKING THE MECHANISM
If the flow rate drops or the temperature becomes unstable, check the
condition of the mechanism.
If necessary, clean and descale the mechanism using a weak acid (vine-
gar, etc.). Brush the filters.
If this is not sufficient, replace the mechanism (4-2).
4 - 1 - 2 C
HECKING THE TEMPERATURE
From time to time check that the temperature of the running water
matches the temperature indicated on the knob.
4 - 1 - 3 D
RAINAGE IN THE EVENT OF FROST
If the thermostatic mixing valve has to be left exposed to frost, it is essen-
tial to drain it :
l either by opening a drainage cap at the low outlet,
l or by opening the plug of the thermostatic mixing valve.
7
Causes and solutions
J
- Check both water inlets.
J
- Hot or cold water production is insufficient.
J
- Pressure of hot water > cold water pressure.
J
- Filters are blocked.
J
- The water inlets are reversed.
J
- The order system is disturbed.
J
- Repeat the calibration.
J
- The water supply does not work.
J
- One of the water inlets is insufficient.
J
- Check filters of the mechanism.
4 - 2 R
EPLACING THE MECHANISM
4 - 2 - 1 O
PENING THE CASE
To open the case easily, proceed as follows :
- close the hot and cold water stop valves and open the drawing taps to
reduce the pressure inside the mixer,
- turn the screws 3 of the plug 2 by a single turn,
- close the drawing taps and open the supply tap for a second so that
the pressure lifts the plug 2 .
- remove the plug and fit the new cover-cartridge.
Proceed as described in the INSTALLATION section.