Mira Go Thermostatic Power Shower Installation And User Manual page 24

Fault Diagnosis - Installer Maintenance
The Thermostatic Power Shower 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 Thermostatic Power Shower 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 Mira Showers Customer Support Department, refer to the rear
page.
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.
Maximum shower
temperature too
hot.
1079321-W2-G
Cause
Air is being sucked down the
vent pipe, as the hot take off
to the shower is too high up
the pipe.
Air entering the hot pipework. Refer to the plumbing system
Insufficient storage of cold
water in cistern
(230 litres recommended).
Insufficient storage of hot
water in cylinder.
Insufficiently sized pipework
for both systems to be used
together.
Maximum temperature
incorrectly set.
Refer to the plumbing system
diagram in the INSTALLATION
REQUIREMENTS for the
correct connection method.
Note the 1 metre hot
takeoff dimension. Consider
increasing the cold feed pipe
to the cylinder to 28 mm
diameter.
diagram in the INSTALLATION
REQUIREMENTS for the
correct connection method.
Increase storage size of the
cold water cistern.
Increase the storage size of
the hot water cylinder.
Increase the pipe sizes or
separately feed the shower.
Refer to the plumbing system
diagram in the INSTALLATION
REQUIREMENTS.
Reset maximum temperature,
refer to COMMISSIONING.
24
Remedy