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2. Fault Diagnosis - Installer Maintenance
The Mira Event is one part of an entire plumbing system. The fitting of a pump
places additional requirements on the plumbing system. Some systems may
require plumbing modifications to allow them to cope with higher flow rates.
Providing the Mira Event has been correctly installed and is operated as
advised, difficulties should not arise. Fault diagnosis and maintenance must be
carried out by a competent person for whom the fault diagnosis table is provided.
In the event of any of the following tests failing, re-check as appropriate before
contacting the Kohler Mira Customer Support Department (Refer to Back Cover).
Malfunction
Shower runs for a
short time (30-60
seconds) then flow
reduces, splutters or
stops. Aggravated
when other hot taps
are in use. Less
evident on full cold.
Shower runs cool
after a short time (1-
2 minutes) then flow
splutters.
Flow of water
virtually stops and
surges on/off, after a
few minutes.
Shower runs cold
after 5-10 minutes.
Shower temperature
affected by use of
adjacent hot/cold
tap.
Cause
Air is being sucked down
the vent pipe, as the hot
take off to the shower is
too high up the pipe.
Air ingress into hot
pipework.
Insufficient storage of
cold water in cistern.
BS6700 recommends
230 litres.
Insufficient storage of hot
water in cylinder.
Insufficiently sized
pipework for both
systems to be used
together.
28
Remedy
Refer to plumbing system
diagrams in the section
"Installation
Requirements" for correct
connection method. Note
the 1 metre hot take-off
dimension. Consider
increasing cold feed pipe to
cylinder to 28mm diameter.
Refer to plumbing system
diagrams in the section
"Installation
Requirements" for correct
connection method.
Increase storage of cold
cistern.
Increase storage of hot
water.
Increase pipe sizes or
separately feed shower.
Refer to plumbing system
diagrams in the section
"Installation Requirements"
for correct connection
method.
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