Kohler Rada VZ1 10 Bedienungsanleitung

11320703-W2-B

Installation and User Guide

IMPORTANT

Installer: This Manual is the property of the customer and must be retained with

the product for maintenance and operational purposes.

RADA VZ1 10 Thermostatic Bar Valve

For SPARES,

ADVICE or REPAIRS

please call us free

on 0344 571 1777

(UK only)

Affix Sticker Here

Model Name:

Product Code:

Date of Manufacture:

(Your guarantee information is included in this guide. Please keep these details

safe as you will need them when registering your product guarantee.)

1320703-W2-B

Thank you for choosing a quality Rada product. To enjoy the full potential of your

new product, please take time to read this guide thoroughly, and keep it handy for

future reference. Products manufactured by Kohler Rada Ltd. are designed to be

safe, provided that they are installed, used and maintained in good working order,

in accordance with our instructions and recommendations.

Follow all warnings, cautions and instructions contained in this guide, and on, or

inside the shower. This guide is also available in digital format from our website or

by contacting customer services.

The Rada VZ1 10 is a thermostatic shower valve with a separate control lever for

on/o󰀨 and temperature control.

The Rada VZ1 10 incorporates a wax capsule temperature sensing unit which

provides an almost immediate response to changes in pressures or temperature of

the incoming water supplies to maintain the selected temperature. An adjustable

maximum temperature stop is provided which limits the temperature to a safe level.

Inlet lters are tted to protect the thermostatic cartridge.

Introduction

We guarantee this product against any defect in materials or workmanship for a

period of one year from the date of purchase.

Failure to follow the instructions provided with the shower will invalidate the

guarantee. For terms and conditions, refer to the customer service page.

Guarantee

Type 2 Valves

This product has been certied as a Type 2 valve. It also complies with the Water

Supply (water ttings) regulations 1999. For further information on Type 2 Valves,

refer to the TMV2 Requirements Manual (available to view or download on our

website www.radacontrols.com). The approved designation for this product is

listed in the table below.

Rada product covered by this guide:

Product Code Model Number Colour Type 2 Designation

N06A Rada VZ1 10 Chrome HP-S

If you experience any difficulty with the installation or operation of your new

thermostatic mixer, please refer to ‘Fault Diagnosis’, before contacting Rada.

Our contact details can be found on the back cover of this guide.

31320703-W2-B

Pack Contents

2 x Wall Brackets1 x Plastic Pipe Guide

2 x Concealing Plates

2 x Compression Nuts2 x Olives

2 x Wall Plugs 2 x Fixing Screws

1 x Component Pack, Containing:

Documentation

1 x Installation and User Guide

1 x Bar Valve

1 x 6 l/min

Flow Regulator

1 x Pair of Handles

2 x Sealing Washers

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Dimensions

135 mm

ø70 mm 45 mm

150 mm

83 mm

HOT COLD

300 mm

51320703-W2-B

Design Registration: GB 001225254-0003

Patents: GB 2 407 138

Domestic 

Light Commercial 

Heavy Commercial 

Healthcare 

Design Registration and Patents

Recommended Usage

PLEASE OBSERVE THE FOLLOWING TO REDUCE THE RISK OF INJURY:

Installing the Shower

1. Installation of the shower must be carried out in accordance with these

instructions by qualied, competent personnel. Read all instructions before

installing the shower.

2. DO NOT install the shower where it may be exposed to freezing conditions.

Ensure that any pipework that could become frozen is properly insulated.

3. DO NOT perform any unspecied modications to the shower or its accessories.

When servicing only use genuine Kohler Rada replacement parts.

4. If the shower is dismantled during installation or servicing then, upon completion,

an inspection must be made to ensure all connections are tight and that there

are no leaks.

Safety Information

WARNING ! This shower can deliver scalding temperatures. For continued

safe operation, follow all instructions, warnings and cautions contained

in this guide and on or inside the shower. Periodic maintenance may be

required to keep the product in good working order.

The function of a thermostatic mixing valve is to deliver water consistently

at a safe temperature. In keeping with every other mechanism, it cannot

be considered as functionally infallible and as such, cannot totally

replace a supervisor’s vigilance where that is necessary. Provided it is

installed, commissioned, operated and maintained within manufacturers

recommendations, the risk of failure, if not eliminated, is reduced to the

minimum achievable.

1320703-W2-B

Using the Shower

5. The shower must be operated and maintained in accordance with the

requirements of this guide. Make sure you fully understand how to operate

the shower before use, read all instructions and retain this guide for future

reference.

6. DO NOT switch the shower on if there is a possibility that the water in the shower

unit or ttings is frozen.

7. The shower can be used by children aged from 8 years and above and persons

with reduced physical, sensory or mental capabilities or lack of experience and

knowledge if they have been given supervision or instruction concerning use

of the appliance in a safe way and understand the hazards involved. Children

must not be allowed to play with the shower.

8. Anyone who may have di󰀩culty understanding or operating the controls of any

shower should be attended whilst showering. Particular consideration should

be given to the young, the elderly, the inrm or anyone inexperienced in the

correct operation of the controls.

9. DO NOT allow children to clean or perform any user maintenance to the shower

unit without supervision.

10. Always check the water temperature is safe before entering the shower.

11. DO NOT adjust the temperature control rapidly while using the shower.

12. Use caution when altering the water temperature while in use, always check

the temperature before continuing to shower.

13. DO NOT switch the shower o󰀨 and back on while standing in the water ow.

14. DO NOT t any form of outlet ow control. Only Rada recommended outlet

ttings should be used.

15. The showerhead must be descaled regularly. Any blockage of the showerhead

or hose may a󰀨ect showering performance.

16. The water supplies to this product must be isolated if the product is not to be

used for a long period of time. If the product or pipework is at risk of freezing

during this period they should also be drained of water.

17. When this product has reached the end of its serviceable life, it should be

disposed of in a safe manner, in accordance with current local authority recycling,

or waste disposal policy.

71320703-W2-B

• For safety and comfort the thermostat will shut o󰀨 the mixing valve within

2 Seconds if either supply fails (achieved only if the blend temperature has

a minimum di󰀨erential of 12°C from either supply temperature).

Thermostatic Shut-down

Temperatures

Close temperature control 20°C - 50°C

Optimum Thermostatic Control

Range

35°C to 45°C

(achieved with supplies of 15°C cold, 65°C hot and

nominally equal pressures)

Recommended Hot Supply 60°C to 65°C

Minimum Hot Water Supply Tem-

perature

55°C

(Note: The mixing valve can operate at temperatures

up to 85°C for short periods without damage.

However for safety reasons it is recommended that

the maximum hot water temperature is limited to

65°C)

Minimum Recommended

Di󰀨erential between Hot Supply

and Outlet Temperature

12°C at desired ow rates

Cold Water Range 1 - 25°C

Specications

Pressures

Maximum Static Pressure 1000 kPa (10 bar)

Maximum Maintained Pressure 500 kPa (5 bar)

Minimum Maintained Pressure

(Gas Water Heater)

100 kPa (1 bar)

(for optimum performance supplies should be

nominally equal)

Minimum Maintained Pressure

(Gravity System)

10 kPa (0.1 bar)

(0.1 bar = 1 Metre head from cold tank base to shower

handset outlet)

Plumbing Connections

Hot: Left 15mm pipework, 3/4" BSP to valve

Cold: Right 15mm pipework, 3/4" BSP to valve

Outlet: Bottom 1/2" BSP Male

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Flow Rates

Typical Flow Rates on Low Pressure System (0.1 bar to 1 bar)

*Note: Pressure Loss = Inlet Pressure - Outlet Pressure (measured at valve outlet)

with 6 L/min Flow Regulator

Outlet Temperature = 39°C

65/15°C Inlet Temperature

Flow Rate (L/min)

Pressure loss (bar)*

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5

91320703-W2-B

Warning! This product does not allow for reversed inlets and will deliver

unstable temperatures if tted incorrectly.

Installation

General

1. Installation of the shower must be carried out in accordance with these

instructions by qualied, competent personnel.

2. The plumbing installation must comply with all national or local water regulations

and all relevant building regulations, or any particular regulation or practice

specied by the local water supply company.

3. Make sure all pressures and temperatures comply with the requirements of the

shower. See ‘Specications’. For Type 2 Valves, refer to supply conditions

given in the TMV2 Requirements Manual (this is available to view or

download from our website www.radacontrols.com).

4. Full bore/non restrictive servicing valves must be tted in a readily accessible

position adjacent to the shower to facilitate maintenance of the shower.

DO NOT use a valve with a loose washer plate (jumper) as this can lead to a

build up of static pressure.

5. DO NOT apply excessive force to plumbing connections; always provide

mechanical support when making plumbing connections. Any soldered joints

should be made before connecting the shower.

6. Pipework dead-legs should be kept to a minimum.

7. DO NOT install the shower unit in a position where access for maintenance is

restricted.

8. The shower must be tted to a waterproof, at and even wall surface. The

two screws and wall plugs supplied are suitable for most solid wall installations.

Alternative xing screws for panel structures are not supplied. Use both xing

points to secure the shower, be sure to use xings appropriate for the chosen

wall structure.

9. When pipework enters the product from the rear through a hole in the wall,

provision must be made to prevent water ingress back into the wall structure.

10. Position the shower unit where the controls are at a convenient height for the

user. Position the showerhead so that the water sprays in line with the bath or

across the opening of a shower cubicle. The installation must not cause the

shower hose to be kinked during normal use.

Suitable Plumbing Installations

The Thermostatic Mixer can be installed with all systems with balanced pressures.

Mixed gravity and mains supplies are not recommended.

1320703-W2-B

11. The water supplies to this product should be isolated if the product is not to be

used for a long period of time. If the product or pipework is at risk of freezing

during this period they should also be drained of water.

12. The position of the shower and shower ttings must provide a minimum air

gap of 25 mm between the showerhead and the spill over level of any bath,

shower tray or basin. There must be a minimum distance of 30 mm between

the showerhead and the spill over lever of any toilet, bidet or other appliance

with a Fluid Category 5 backow risk.

Zone of

Backflow

Risk

30 mm

Minimum

Toilet or Bidet

FC5

Hand Basin

FC3

Bath or Shower

Tray FC3

Shower

Unit

25 mm

Minimum

25 mm Minimum

Note : There will be occasions when the hose retaining ring will not provide a suitable

solution for Fluid Category 3 installations. In these instances an outlet double

checkvalve must be tted, this will increase the required supply pressure typically

by 10 kPa (0.1 bar). Double checkvalves tted in the inlet supply to the appliance

cause a pressure build up, which a󰀨ects the maximum static inlet pressure for the

appliance and must not be tted. For Fluid Category 5, double checkvalves are

not suitable.

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