Ideal-Standard A5322AA Manuale utente
INSTALLER: After installation please pass this instruction booklet to the user
182
150
143
85
43
Ø26
Ø21
Ø52
15mm
compression
Ø31.5
45º
30
11
Ø69
41
Ø57
A5322AA In-line Thermostatic Shower Valve
A5525AA Second Outlet Kit
A5526AA Retro Fit Installation Kit
BEFORE CONNECTION FLUSH WATER THROUGH PIPEWORK TO REMOVE
ALL GRIT & DEBRIS WHICH COULD DAMAGE THE VALVE MECHANISM
40º
Ø33
G½
115.5
Installation Instructions
IN-LINE THERMOSTATIC SHOWER VALVE
- 2 -
The fittings covered by these instructions should be installed in
accordance with the Water Regulations published in 1999*.
Ideal Standard strongly recommends that these fittings are installed by
a professional fitter.
*A guide to the Water Supply (Water Fittings) Regulations 1999 and the Water Byelaws 2000, Scotland is published by WRAS
(Water Regulations Advisory Scheme) Fern Close, Pen-y-Fan Industrial Estate, Oakdale, Newport, NP11 3EH.
ISBN 0-9539708-0-9
INTRODUCTION
1
These thermostatic shower mixers are designed to be installed on normal UK low pressure storage
tank fed systems, unvented high pressure systems, modulating instantaneous water heaters or
modulating combination (combi) boilers. They are suitable for all pumped applications.
WATER REGULATIONS
Hot and cold water supply pressures must be reasonably balanced and from a common source - both
from storage or both from a supply pipe. (IRN 101). The mixers will function within specification on
unequal pressures up to a ratio of 5 : 1, but it is not recommended that the cold supply be connected to
the rising main and hot to the tank fed supply as the pressure differential is likely to exceed the 5:1
ratio. (See table 1) The minimum pressure for correct operation is 0.1 bar (1m head). Pressure head
is measured as the vertical distance between the bottom of the cold water storage tank which feeds
the hot water system and the highest point on the shower spray plate. When installing with a shower
pump the use of a secondary tapping from the cylinder is highly recommended.
Figure 1 shows the various methods of connecting the hot water pipe to the cylinder - the most
preferred on the left and the least preferred on the right.
The fitting should be so installed as to be readily accessible for examination, repair, replacement or
operation. (IRN 111).
The temperature of the hot water must not exceed 85ºC but the installer’s attention is drawn to code of
practice BS 6700 which recommends that stored hot water should normally never exceed 65ºC. For
correct operation of the valve, a minimum of 55ºC is required.
most preferred solution least preferred solution
Essex flange 22mm Surrey flange
22mm outlet
From vertical
expansion pipe
22mm pipework
Figure 1
Preferred arrangements for cylinder tapping
From underside of
expansion pipe off-set
at 60 22mm pipeworkº
- 3 -
BSEN1111 BSEN1287
Operating pressure range: High Pressure Low Pressure
Maximum static pressure - Bar 10 10
Flow pressure hot and cold - Bar 0.5 to 5.0 0.1 to 1.0
Hot supply temperature - °C 55 to 65 55 to 65
Cold supply temperature - °C up to 25°C max up to 25°C max
Temperature differential characteristic (TDC) °C 10 10
Table 1 Conditions for normal use
2SUPPLY CONDITIONS
MODULATING COMBI BOILER
This thermostatic shower valve is designed for use with modulating
combination boilers.
When installing on a modulating combination boiler it is sometimes possible
for the interaction of a thermostatic valve with the combi to cause the boiler
to cut out and cut in again. With the result that the water will become
alternatively cold and hot. To overcome this, the 4 L/min flow regulator
provided should be fitted upstream of the thermostatic valve. It should be
fitted in any 15mm compression fitting in the dedicated cold supply pipe.
It is important to choose a compression fitting located in a position which is
accessible after installation and it must be fitted the correct way round for the direction of flow (see
fig2). The regulator can be fitted in either the inlet or outlet side of the compression fitting. If fitting in
an outlet side, ensure the o-ring is seated fully in the visible rebate around the edge of the regulator.
Use the tip of a small screwdriver or similar to achieve this. Ensure the tail of the pipe is not fouling
the regulator (shorten if required) and do up the compression fitting as normal. In a minority of cases,
where the boiler is of a type which stores a small quantity of very hot water, it may also be necessary
to fit a 4 l/min flow regulator in the hot supply. These can be obtained from Customer Care
(A962570NU)
The fitting of isolation valves is required as close as is practicable to the water supply inlets of the
thermostatic mixing valve.
The fitting of strainers is recommended as close as is practicable to the water supply inlets of the
thermostatic mixing valve.
flow direction
through
flow regulator
Figure 2
FLOW RATE
Flow rate L/Min
Pressure - Bar
60
50
40
30
20
10
1.0 2.0 3.0
Flow Curve for A5322 - free outlet
0.1
0
29 l/min
50 l/min
8 l/min
- 4 -
Figure 3 Backflow risk from a fluid category 3
Figure 4 Backflow risk from a fluid category 5
zone of backflow
risk for longer
hose
spill
over
level
bath or shower tray
25mm minimum air gap
required if check valves are
not fitted
spill over
level
washbasin
zone of
backflow risk
for shorter
hose
no additional
backflow protection
required
cold and hot water supplies
to shower valve will need
additional check valves on each
service if longer hose is fitted
zone of backflow risk
for restrained hose
which is longer than
system design hose
- not permitted -
zone of backflow
risk for unrestrained
hose
zone of backflow risk
for restrained hose
w.c.
spill-over
level
shower tray
or bath tub
bidet
w.c.
spill-over
level
restrained hose giving
the 25 mm air gap is
permitted
25mm
minimum
unrestrained
hose would
not be
permitted
WATER REGULATIONS
3
CATEGORIES OF RISK
The water regulations published in 1999* take a new approach to backflow in that they look at
different categories of risk. The installer must assess the risk from the various categories of fluid in
adjacent appliances before determining the level of backflow protection required for a particular
installation. Figures 3 & 4 describe the protection required in various installations.
CATEGORY 3 RISK
Water in a shower tray, basin or bathtub is considered to be a fluid category 3 risk which is a fluid
which represents a slight health hazard if it were to find it’s way back into the supply pipe. For this
reason it must not be possible for any flexible shower head to be able to enter any adjacent
washbasin, bath or shower tray unless appropriate protection is employed. (See Figure 3). If it is
desired to allow the hand spray to be used inside say a bathtub or a basin it is essential that double
check valves be fitted to the inlet on both hot and cold supplies to the thermostatic valve. Alternatively
single check valves can be fitted at the
inlets and an additional check valve should
be fitted in the valve outlet.
No check valves need be fitted if the hand
spray is prevented from reaching closer
than 25mm of the spill over level of any
such fixture.
CATEGORY 5 RISK
Water in a Sink, WC or Bidet is considered
to be a fluid category 5 risk which is a fluid
which represents a serious health hazard if
it were to find it’s way back into the supply
pipe. For this reason it must not be
possible for any flexible shower head to be
able to enter any adjacent Sink, WC or
Bidet. If the flexible hose to be fitted could
reach into any such vessel, the
requirements to the system design are so
onerous it is better not to fit a flexible.
Rather, a fixed overhead showerhead
should be considered. (See Figure 4).
It will also be seen that this risk could
change should the hose be taken out of
the restraining device or should a longer
replacement hose be fitted at a later date.
Installers and householders are advised to
take account of these factors when fitting
replacement hoses.
For pumped applications the pipe
supplying the pump must not in addition
supply an ascending spray bidet.
- 5 -
The thermostatic mixing valve must be installed in such a position that maintenance of the TMV and its
valves and the commissioning and testing of the TMV can be undertaken.
1. The Thermostatic mixer can be installed with rear, rising or falling supply inlets. Decide on the most
appropriate method of your installation, and rotate the elbows to suit.
2. Mark horizontally the positions of the holes for the backplate and pipe centres on the finished wall
as shown
150
41
6. Fit the supply pipework: Hot on the Left / Cold on the right. The inlet pipework should extend 32mm
(+/-1mm) from the finished wall surface.
7. Remove the backplate from the mixer by loosening the grubscrew with a 2.5mm hexagonal key
(supplied). Secure the mounting bracket to the wall
with the screws and plugs provided.
3. For exposed rising or falling supplies the pipe positions should be set 43mm from the centre of
pipe to the finished wall at 150mm centres. Note if replacing an existing installation with pipework
centres between 147mm and 155mm a universal retrofit accessory kit is available A5526AA
4. For solid walls drill the holes for the backplate with a 6mm drill and insert the wall plugs (supplied).
For other types of wall structure alternative fixings may be required (not supplied)
5. For rear entry supplies only. Drill the holes for the supply pipes at 150mm centres.
Note!
Recess the inlet holes Ø33mm x 12mm deep to allow for the concealing plates.
32 150
41
Recess depth
Ø33mm x 12mm
INSTALLATION GUIDE
4
hot
cold
Figure 6
Figure 7
Figure 5
- 6 -
8. For rear entry supplies only:
Fit the concealing plates over the inlet pipes.
Note! Apply silicone sealant to the back face
of the plate.
9. Caution! It is essential at this point
that the supply pipework is thoroughly
flushed through before connection to the
mixer. Failure to do so may result in
product malfunction.
10. Fit the compression nuts and olives
onto the supply pipes. If 2nd outlet is
required, this should be fitted now,
see section 11
11. Align the mixer with the pipework and
fit onto the backplate.
Important! Make sure that the hot and cold
inlets on the mixer correspond with the hot
and cold inlet supplies.
12. Tighten the grubscrew to secure the
mixer to the backplate.
13. Tighten the compression nuts onto the
mixer with a 24mm A/F spanner.
Caution! Take care not to damage the chrome surfaces.
14. Fix the shower fittings, refer to your shower fittings installation and user guide for instructions.
15. Turn on the hot and cold water supplies and check for leaks
16. Before using the shower refer to the Commissioning section
Concealing plate
Apply silicone
sealant to back
face of flange
INSTALLATION GUIDE continued
hot
cold
Figure 8
Figure 9
40º
- 7 -
OPERATION
Figure 10
temperature
control
handle
flow control
handle
hotter
colder
on
off
- 8 -
In the event of the thermostatic cartridge
requiring re-calibration the following
procedure should undertaken.
1. Remove the Ideal Standard logo
button and disconnect the handle.
2. Slide out the red "U" piece (b)
exposing temperature control mechanism
(d).
3. Turn on the shower, position a
thermometer in the running water and
when the temperature settles, rotate the
temperature control mechanism until
40ºC is achieved.
4. Reconnect the handle carrier (e)
ensuring the arrow guide (c) is at 12
o'clock and refit the
red "U" piece (b).
5. Reconnect the Handle and logo
button.
The maximum mixed water
temperature is factory set at 40ºC. To
change this temperature, remove the
temperature control handle. Remove
the temperature limit stop (black H-
shaped plastic part) and reinsert it in
the appropriate recess on the handle
carrier. Four different settings are
possible.40ºC, 43ºC, 45ºC & 50 ºC
(See fig 11). Refit temperature
handle.
Details of the recommended code of
practice for safe water temperatures
can be found on the Thermostatic
Mixing Valve manufacturers
Association web site:
www.tmva.org.uk
43°C
40°C
45°C
Max 50 C°
21
c
d
b
e
af
The fitting of isolation valves and strainers should be as close as is practicable to the water supply
inlets of the thermostatic mixing valve. The thermostatic cartridge seldom fails and the possibility of
blocked filters should be investigated before contemplating replacing it. Small particles of debris may
still find their way past the strainers and onto the filter screens on the thermostatic cartridge. These
should be cleaned and re-fitted. See section on cartridge replacement.
5
6
7
MAXIMUM TEMPERATURE STOP
CALIBRATION
MAINTENANCE
Figure 11
Figure 12
- 9 -
The following procedures should be carried out after installation and every 12 months after to ensure that the
valve is functioning correctly.
Check that:
1. The application of the thermostatic valve matches the approved designation.
2. The supply pressures are within the recommended range for the application.
3. The supply temperatures are within the permitted range for the application and comply with the guidance
for prevention of Legionella.
4. The mixed temperature is as required for the application.
Record:
5. Each hot and cold supply. (Make a note of the measuring device used).
6. The mixed water temperature at the outlet device.
Isolate:
7. The cold supply to the mixing valve and record the mixed water temperature after about 5 seconds.
The temperature should not exceed the value given in table (2) below.
Note: 46 C is the maximum advised mixed water temperature from a bath tap. The maximum
temperature takes account of the allowable temperature tolerances inherent thermostatic mixing valves
and temperature loss in metal baths. It is not a safe bathing temperature for adults and children.
The British Burns Association recommends 37°C-37.5°C as a comfortable bathing temperature for
Children.
It should be noted in premises covered by the Care Standards Act 2000, the maximum mixed water
temperature is 43°C
°
Table 2 A guide to maximum temperature sets
Application Mixed water Advised maximum temperature
temperature rise during site testing
Shower 41 °C 43 °C
8
9
ADVISED COMMISSIONING & PERIODIC CHECKS
FREQUENCY OF REGULAR SERVICING
The purpose of servicing regularly is to monitor the performance of changes in system and valve set
up. This may require the need to adjust either the supply system or the valve. The A5322AA should
be checked and tested 12 months after commissioning.
Firstly measure the water temperature at the shower outlet.
Carry out the cold water supply isolation test by isolating the cold water supply to the TMV, wait for 5
seconds if water is still flowing check that the temperature is below 46C. If there is no significant
change to the set outlet temperature (+/-2ºC or less change from the original settings) and the fail-safe
shut off is functioning, then the valve is working correctly and no further service work is required.
Notes:
A residual flow is permitted during the commissioning or the annual verification (cold water supply
isolation test), then this is acceptable providing the water temperature is no more than 2ºC above the
designated outlet temperature.
Temperature readings should be taken at the normal flow rate after allowing for the system to stabilize.
The sensing part of the thermometer probe must be fully submerged in the water that is to be tested.
Any TMV that has been adjusted or serviced should be re-commissioned and retested in accordance
with the instructions detailed above.
- 10 -
1. Remove the temperature control handle by first prizing out the index button with a small screwdriver
and then removing the “pozi-drive” screw
2. Remove the temperature handle carrier. To do this slide the black serrated lever in a clockwise
direction with a screwdriver. Hold it there and pull off the carrier.
3. The thermostatic cartridge can then be unscrewed with a 24mm A/F Spanner.
Refit the cleaned original or a new thermostatic cartridge and replace the carrier and handle
THERMOSTATIC CARTRIDGE REPLACEMENT
10
Figure 13
Figure 14
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