29
Malfunction
Cause
Remedy
Increase storage of hot water.
Flow of water virtu-
ally stops and
surges on/off, after
a few minutes.
Insufficient storage of
cold water in cistern
(230 litres recom-
mended).
Increase storage of cold water cis-
tern.
Increase pipe sizes or separately
feed shower. Refer to plumbing sys-
tem diagrams in the section "
Instal-
lation Requirements
".
Incorrect setting of
maximum tempera-
ture.
Reset maximum temperature. Re-
fer to "
Commissioning: Adjust-
able Maximum Temperature
Setting
".
Shower temperature
affected by use of
adjacent hot/cold
tap.
Maximum shower
temperature too hot.
Shower runs cold
after 5–10 minutes.
Insufficiently sized
pipework for both sys-
tems to be used to-
gether.
Insufficient storage of
hot water in cylinder.
Shower temperature
too cold.
Maximum temperature
incorrectly set.
Hot water cylinder tem-
perature less than 12°C
above shower tem-
perature.
Reset maximum temperature. Re-
fer to "
Commissioning: Adjust-
able Maximum Temperature
Setting
".
Adjust cylinder temperature.
Note!
It is recommended that the
stored water temperature does not
exceed
65°C
.
Blend temperature
unstable.
Inlet filter blocked.
Isolating valve partially
closed.
Spray plate blocked.
Clean filters.
Open valve.
Clean spray plate. Refer to the
Installation and User guide sup-
plied with the
shower fittings
.
Summary of Contents for Extreme Thermostatic
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