Bristan MT503CP Istruzioni per il montaggio

Installation Instructions

and User Guide

Temperature Stabilised

Thermostatic Mixing Valve

Models Covered:

MT503CP, MT503CP-ISO,

MT503CP-ISOELB

Please keep this booklet for future

reference.

Installer, when you have read these

instructions please ensure you leave

them with the user.

2Need help? Give us a call on 0330 026 6273 and speak to one of our trained advisors.

Welcome to your new Bristan Mixing Valve

All products manufactured and supplied by Bristan are safe provided they are installed,

used correctly and receive regular maintenance in accordance with these instructions.

Isolation valves must be ﬁtted to the inlet water supplies to ensure ease of future

maintenance. This product must not be modiﬁed in any way as this will invalidate the

guarantee.

Full access must be made available for future maintenance / servicing purposes.

This product needs to be installed in accordance with, and meet the requirements of

the Water Supply (Water Fittings) Regulations 1999 and Scottish Byelaws 2004.

These mixing valves have also been tested to the TMV2 and TMV3 schemes and

comply to BS EN: 1287 and BS EN: 1111; so long as they are commissioned and serviced

in line with TMV standards. Please read the TMV guide supplied with this valve for

further information.

If in doubt, contact a registered plumber or your Local Water Authority or the

Secretary of the Institute of Plumbing, address as follows;-

The Institute of Plumbing,

64 Station Lane,

Hornchurch,

Essex,

RM12 6NB, Tel: 01708 472791

Contents

• Speciﬁcation 3

• Dimensions (mm) 3-4

• Installation 5-8

• General Cleaning 9

• Maintenance 9-10

• Notes 11

Need help? Give us a call on 0330 026 6273 and speak to one of our trained advisors.

Speciﬁcation

Pressure

BAR

1.0

5.0

4.0

2.0 3.0

Pressure

BAR

1.0

5.0

4.0

2.0 3.0

Maximum Static Pressure:

1.0 MPa (10.0 bar)

Maximum Pressure Dierential: 20:1

Temperature Dierential: +/-2°C from set temperature

The sensitive wax capsule will shut down the valve if the hot or

cold water supply fails, provided that there is at least a 10°C

dierence between the mixed water temperature and the

remaining supply.

Min: 0.01 MPa

(0.1 bar)

Max: 0.25 MPa

(2.5 bar)

Working Pressures

Inlet & Outlet

Connection

15mm

Compression

Speciﬁcations Inlet Water Temperature

5°C

20°C

Cold Water Supply

Min: 5°C Max: 20°C 65°C Recommended

Hot Water Supply

80°C

IMPORTANT

The inlet hot water must

be at least 10°C above the

required blend temperature.

TMV2 & TMV3 Designations

65°C

LP-B, HP-B, LP-W,

HP-W, LP-T, HP-T,

LP-S, HP-S

Outlet

Temperature

Pre-set to

43°C

Dimensions (mm)

MT503CP

To replace any spare parts

for your mixing valve, why not

scan the QR Code or

visit www.bristan.com

and search for your product.

Spare Parts

145

105

4Need help? Give us a call on 0330 026 6273 and speak to one of our trained advisors.

105

200

Dimensions (mm)

MT503CP-ISO

MT503CP-ISOELB

105

190

Need help? Give us a call on 0330 026 6273 and speak to one of our trained advisors.

Installation

IMPORTANT: Please ensure both supply pipes are ﬂushed before connecting the

mixing valve to prevent plumbing/pipe debris from entering the mixing valve.

Also ensure that the mixing valve is situated in a place where the commissioning,

testing and maintenance of to TMV standards can be undertaken.

Please read the TMV guide supplied with this product for more information.

If you have purchased MT503CP; we advise installing isolation valves as close as its

practical to the mixing valve for ease of maintenance.

Please check component drawings for completeness before starting installation.

1. Plumb the pipes to the desired

location for the mixing valve,

ensuring that they’re secure in

position.

2. Connect the valve to the pipework,

We recommend using a high

tightening torque (45-50Nm) on

all compression ﬁttings to secure

the valve.

IMPORTANT: Please ensure both

supply pipes are ﬂushed before

connecting the mixing valve to

prevent plumbing/pipe debris from

entering the mixing valve.

Remember: Ensure the valve is ﬁtted

with the hot inlet on the left, cold

on the right when viewed from the

front.

3. Connect your chosen outlet to the

mixing valve. Turn on the water

supply and check all joints and

connections for any leaks.

4. Please refer to the TMV guide in

order to test and commission the

mixing valve.

23 24

Need help? Give us a call on 0330 026 6273 and speak to one of our trained advisors.

Installation

MT503CP-ISOELB

MT503-ISOELB Components List

Part

No.

Description Qty Part

No.

Description Qty

1Anti-tamper Cover 113 Piston Assembly 1

2Head Assembly 114 Return Spring 1

3Clamp Ring 1 15 Body 1

4Outer Spring 116 15mm Compression Nut 5

51/2” Check Valve 2 17 15mm Compression Ring 5

6BS206 O-Ring 70 Shore 2 18 Thermostat 1

7Flat-Face Adaptor 219 Thermostat Housing 1

8Filter Washer 220 BS120 O-Ring 80 Shore 1

9Isolation Elbow Assembly 221 BS023 O-Ring 70 Shore 1

10 3/4” Adaptor Assembly 2 22 Plain Ring 1

11 3/4” Coupling Nut 2 23 BS010 O-Ring 90 Shore 1

12 Fibre Washer 224 Adjusting Screw 1

Components List

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Installation

MT503 Components List

Part

No.

Description Qty Part

No.

Description Qty

1Anti-tamper Cover 112 Body 1

2Adjusting Screw 1 13 Piston Assembly 1

3Head Assembly 114 3/4” Adaptor Assembly 2

4Plain Ring 115 Bucket Filter 2

5Clamp Ring 1 16 15mm Compression Nut 3

6BS023 O-Ring 70 Shore 1 17 15mm Compression Ring 3

7Outer Spring 118 1/2” Check Valve 2

8BS120 O-Ring 80 Shore 1 19 Fibre Washer 2

9Thermostat Housing 120 3/4” Coupling Nut 2

10 Thermostat 121 BS010 O-Ring 90 Shore 1

11 Return Spring 1

21 3

1415

16 17 18 19 20

1 2

MT503CP

8Need help? Give us a call on 0330 026 6273 and speak to one of our trained advisors.

Installation

5678

MT503CP-ISO

MT503-ISO Components List

Part

No.

Description Qty Part

No.

Description Qty

1Anti-tamper Cover 112 Return Spring 1

2Adjusting Screw 1 13 15mm Compression Ring 3

3Head Assembly 114 15mm Compression Nut 3

4BS023 O-Ring 70 Shore 1 15 Body 1

53/4” Coupling Nut 2 16 Thermostat Housing 1

61/2” Check Valve 2 17 Thermostat 1

715mm Inlet Isolation Valve 2 18 Fibre Washer 2

8 Filter Mesh 219 Clamp Ring 1

9BS120 O-Ring 80 Shore 1 20 Plain Ring 1

10 Outer Spring 121 BS010 O-Ring 90 Shore 1

11 Piston Assembly 1

Need help? Give us a call on 0330 026 6273 and speak to one of our trained advisors.

General Cleaning

Bristan products are made from

premium materials, with hand polishing

and electroplated ﬁnishes.

Your shower kit should be regularly

cleaned with warm water, a mild

pH-neutral liquid soap, and polished

with a soft cloth. Any residues from

soap, toothpaste, shampoos and

shower gels can cause blemishes if

not rinsed o straight after use.

Maintenance

3. Remove the thermostat (10/17/18),

piston assembly (11/13), thermostat

housing (9/16/19) and return spring

(11/12/14).

4. Soak all components in a suitable

solution until fully de-scaled. Check

all seals and O-Rings for damage

and replace if necessary.

5. Re-grease parts using a WRAS

Approved grease and reverse the

steps to re-assemble the valve.

6. Turn on the water supply and check

all joints and connections for any

leaks.

7. Follow the Temperature Adjustment

process to check and re-calibrate

the maximum temperature.

Cartridge Cleaning

To clean the cartridge, follow

the steps below:

1. Isolate the hot and cold water

supplies. Remove the anti-tamper

cover (1).

Note: If you have purchased the

MT503CP-ISO or MT503CP-ISOELB,

simply turn the screws in the

isolation assemblies to isolate the

water supplies.

2. Unscrew the head assembly (2/3)

from the body (12/15) using a

suitable spanner.

IMPORTANT: Note the position of

the Adjusting Screw (2/24) before

removing. It will need to be replaced

in the same position in order to

maintain the current maximum

temperature.

Household bleaches and cleaners

contain harsh chemicals and may

damage the surface ﬁnish. Avoid using

abrasive cloths, scouring pads, scrub

sponges, steel wool or anything similar.

10 Need help? Give us a call on 0330 026 6273 and speak to one of our trained advisors.

Maintenance

Temperature Adjustment

This valve is pre-set to a maximum

outlet temperature of 43°C.

It can be adjusted to have a maximum

temperature between 30°C - 55°C

IMPORTANT: To comply with the

TMV scheme, this valve cannot have a

maximum outlet temperature of 44°C.

If set higher, it will no longer comply

with the TMV scheme.

Please see the TMV manual supplied

with this valve for more details.

To adjust the temperature, follow

the steps below:

1. Turn on the valve and set to the

maximum temperature.

2. Remove the anti-tamper cover (1)

from the body (6). Using a suitable

hex key, insert through the head

assembly (3) and locate into the

groove of the adjusting screw (2).

3. Turn the adjusting screw (2) clockwise

for a cooler temperature, anti-

clockwise for a hotter temperature.

4. Wait for a few minutes after adjusting

for the temperature to stabilise. Use

a thermometer to measure the outlet

temperature. Repeat step 3 until you

have reached the desired result.

5. Replace the anti-tamper cover (1).

Head Assembly Parts

Part

No.

Description Qty

2Adjusting Screw 1

3Head Assembly 1

4BS010 O-Ring 90 Shore 1

5BS029 O-Ring 1

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