Ideal-Standard A5322AA Manual de usuario

INSTALLER: After installation please pass this instruction booklet to the user

182

150

143

Ø26

Ø21

Ø52

15mm

compression

Ø31.5

45º

Ø69

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

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

1.0 2.0 3.0

Flow Curve for A5322 - free outlet

0.1

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

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

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

Recess depth

Ø33mm x 12mm

INSTALLATION GUIDE

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

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°

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.

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

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

Figure 13

Figure 14

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