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rada 215-t3 Series Product Manual

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215-t3/222-t3 SERIES
PRODUCT MANUAL
IMPORTANT
Installer: This Manual is the property of the customer and
must be retained with the product for
maintenance and operational purposes.
1

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Summary of Contents for rada 215-t3 Series

  • Page 1 215-t3/222-t3 SERIES PRODUCT MANUAL IMPORTANT Installer: This Manual is the property of the customer and must be retained with the product for maintenance and operational purposes.

  • Page 2: Table Of Contents

    INDEX Page SAFETY WARNINGS ADVICE INTRODUCTION DESCRIPTION DIMENSIONS SPECIFICATION INSTALLATION COMMISSIONING OPERATION FAULT DIAGNOSIS MAINTENANCE SPARE PARTS CUSTOMER CARE Back Cover If you experience any difficulty with the installation or operation of your new mixing valve, then please refer to the Fault Diagnosis section, before contacting Kohler Mira Limited.

  • Page 3: Safety Warnings

    SAFETY : WARNINGS SAFETY : WARNINGS The function of this thermostatic mixing valve is to deliver water consistently at a safe temperature. This requires that: 1. It is installed, commissioned, operated and maintained in accordance with the recommendations given in this Manual. 2.

  • Page 4: Introduction

    INTRODUCTION The Rada 215-t3 and Rada 222-t3 Thermostatic mixing valves are specified to meet the highest standards of safety, comfort and economy as demanded by todays users. All Rada products are designed, manufactured and supported in accordance with accredited BS EN ISO 9001:1994 Quality Systems.
  • Page 5 Model Range References: c - all chrome finish b - built-into wall recess or panel, temperature knob protrudes through stainless steel plate. d - duct or fully concealed mounting, no user access required. k - locked temperature control, requires wrench key to adjust. Product Selector 215-t3c 215-t3bc...

  • Page 6: Dimensions

    DIMENSIONS All dimensions are nominal and in mm Rada 215-t3-c Rada 215-t3 bc 14150-672- 50-67 2 1 2 1 6 5 1 6 2 1 1 8 0 1 2 8 2 5 4 1 2 1 7 5 0 1 0...
  • Page 7 Rada 222-t3 dk Rada 215-t3 dk...

  • Page 8: Specification

    SPECIFICATION Normal Operating Conditions are considered as: - inlet dynamic pressures nominally balanced to within 10% of each other during flow. - a differential of approximately 50 C between the hot and cold inlet temperatures, and with differentials of 15-35 C between the blend setting and either supply.
  • Page 9 Hydraulic Restriction: Flow Rate/Pressure Loss Graph (mixing valve only, equal dynamic supply pressures and mid-blend temperature setting). Rada 222 Rada 215 Pressure Loss - bar...
  • Page 10 C where serving ablutionary applications. Flow Control Rada 215-t3/222-t3 series mixing valves do not have integral flow control; appropriate provision must be made for this in the outlet pipework. This can be in the form of basin/bath tap, stopcock, mechanical timed-flow controller or solenoid.
  • Page 11 Inlet/Outlet Options: inlets:* outlet:* 215-t3 c top, bottom, rear-fed top, bottom 215-t3 bc top, bottom top, bottom 215-t3 dk/222-t3 dk any configuration any configuration *Products are supplied in the format shown in bold. Standard Connections are: hot - left (marked red) cold - right (marked blue) Outlet - top (can be altered to bottom outlet as required, refer to INSTALLATION).

  • Page 12: Installation

    Outlet Position/Reversed Inlets Rada 215-t3 dk and 222-t3 dk models are readily adaptable for rising or falling pipework; the flat-faced union connectors provided allow the valve body to accept a variety of pipework configurations, and to be reversed or inverted as appropriate.
  • Page 13 reversing, it is easier to simply rotate the complete mixing valve by 1/2 turn, and then reposition the temperature knob or cap. Outlet Reversal should be done prior to installation of the mixing valve body. Reversed connections can be altered before or after the mixing valve has been installed.
  • Page 14 Installation - Rada 215-t3 c When unpacked, the inlet elbows are positioned to accept falling supplies. Should the installation require rising or rear-fed supplies then the elbows will need adjusting: loosen each elbow grubscrew (618 22) using 2.5 mm wrench key provided, pull the elbow away from the valve body and refit in the desired position, and re-tighten the grubscrew.
  • Page 15 Installation - Rada 215-t3 bc - wall recess The Rada 215-t3-bc is suitable for building-in to solid, dry-lined, stud partition or dry partition wall structures. To allow for connection of pipework, the recess in the wall (unfinished) should be approximately 180 mm x 117 mm x 50 mm (see Figure 2).
  • Page 16 Important: Flush through the hot and cold supplies thoroughly before connection to mixing valve. Connect inlet and outlet pipework, checking that the hot and cold supplies have been piped to the correct inlets, and check all connections are watertight. Assemble building-in shroud (407 92) as shown below (Figure 3), and fit over mixing valve in recess.
  • Page 17 Refer to COMMISSIONING. Installation - Rada 215-t3 bc - thin panel The Rada 215-t3 bc incorporates a mounting bracket, enabling the valve to be installed through a laminated panel or shower cubicle. The bracket must be mounted to the rear face of panels of 2-15 mm finished thickness (see below for thicker panels).
  • Page 18 50 mm Figure 5 Installation - Rada 215-t3 bc - Panels 16 mm Note! The mounting bracket can also be mounted to the front face of thicker panels which will receive a further finishing layer of 2-17 mm thickness. If this further finishing layer is not to be provided, the ends of the mounting bracket must be recessed 2 mm depth) into the panel face until flush.
  • Page 19 15 mm over the front face of the mounting bracket. Protect the mixing valve and pipe connections during this process. Follow Rada 215-t3 bc instructions 7-10 for wall recess installation. Refer to COMMISSIONING. Installation - Rada 215-t3 dk and 222-t3 dk The mixing valve is supported by its inlet and outlet pipework only, which must be suitably and securely fastened.

  • Page 20: Commissioning

    The maximum blend temperature obtainable by the user should be limited, to prevent accidental selection of a temperature that is too hot. All Rada Thermostatic mixing valves are fully performance tested and the maximum temperature is preset to approximately 43 C under ideal installation conditions at the factory.
  • Page 21 For Adjustable Temperature: Remove the temperature knob assembly (442 01) or locking cap (408 51) using 3 mm wrench key provided (see Figure 1). Pull off the temperature hub (407 28/29). Rotate the spindle until required maximum blend temperature is obtained at discharge point (clockwise = decrease temperature).
  • Page 22 For Locked Temperature (Initial setting) Remove the temperature knob assembly (442 01, see Figure 1) using 3 mm wrench key provided, and lever off body shroud, and discard. Retain the locking screw (615 87). (Resetting) Remove locking screw (615 87) using 3 mm wrench key provided, and pull off locking cap.
  • Page 23 Additional checks for Type 3 valves in healthcare installations 4.1. Do the following checks: (a) The designation of the thermostatic mixing valve matches the intended application. (b) The supply pressures are within the range of operating pressures for the designation of the valve. (c) The supply temperatures are within the range permitted for the valve and by guidance information on the prevention of legionella etc.

  • Page 24: Operation

    OPERATION For models with standard temperature knob fitted, adjustment of blend temperature from preset maximum to cold is achieved by clockwise rotation of the knob. For models with locked temperature control, no user adjustment is intended. Control of flow is via separate outlet valve(s), refer to SPECIFICATION.

  • Page 25: Fault Diagnosis

    FAULT DIAGNOSIS Symptom Cause/Rectification a. Inlet supplies reversed (i.e. hot supply to cold inlet). 1. Only hot or cold Check. water from outlet. b. No hot water reaching mixing valve. Check. c. Check strainers and inlet/outlet fittings for blockage. d. Refer symptom 5 below. e.

  • Page 26: Maintenance

    As with all other thermostatic mixing valves, the critical sensing element in the Rada 215/222 series together with other “critical components” will exhibit wear over a period of time and usage. All of the critical components are contained...

  • Page 27: Spare Parts

    The designed minimum service life of all cartridges used in Rada products is 5 years providing the Rada 215/222 series is operated with the recommended operating conditions and within the recommended operating parameters. However, when supply conditions and/or usage patterns do not conform to the...
  • Page 28 The In-service test procedure is shown in Figure 5. This should be carried out at both 6 to 8 weeks and 12 to 15 weeks after commissioning the valve. The results of these tests are used to determine when, after initial commissioning, the in- service test is next repeated.
  • Page 29 Components are precision-made, so care must be taken while servicing to avoid damage. When ordering spare parts, please state product type, i.e. Rada 215-t3 or 222-t3, and identify part name and number (refer to PARTS LIST). A Service pack is available, containing all the seals and strainer screens that may be necessary for renewal during maintenance or servicing (part no.
  • Page 30 Figure 1 - 215-t3 bc With removal clip still in place, unscrew the head nut using 35 mm A/F wrench; this will release the body shroud and also begin to draw the Thermostatic cartridge out of the body (see Figure 2). Warning: some residual water may be released.
  • Page 31 Lightly coat all seals with a silicone-only based lubricant to assist reassembling (see Lubricants). Inlet port seals Body seal Thermostatic unit (215-t3 series - black 222-t3-dk - yellow) Locking ring Location lug (2) (215-t3 series) Figure 3 - Thermostatic Cartridge...
  • Page 32 Re-assembly 10. Identify which is the hot inlet to the mixing valve body, and align the Thermostatic cartridge accordingly. Carefully push the Thermostatic cartridge back into the valve body, checking that the 2 cartridge inlet port seals remain in place (see Figure 3), and locate cartridge lugs into body slots.
  • Page 33 The Checkvalve cartridge assembly may be cleaned by removal of the inlet strainers (see Figure 4), and flushing through under a jet of water to remove lodged particles. The Checkvalve cartridge is not a serviceable item, so any apparent wear or damage will require its renewal.
  • Page 34 Lightly coat seals with a silicone-only based lubricant to assist re-assembly. When re-inserting adaptors, do not over-tighten. Refit and remake pipework connections, restore hot and cold supplies and check for any leaks. Maintenance Procedure - Inlet Strainers Blockage of the inlet strainer screens (208 90) can lead to poor flow performance and reduced temperature control.
  • Page 35 Recommended Content of Maintenance Log It is recommended that the Maintenance Log should record the following: Details of valve, location and use, risk level and instructions Valve make and model Valve unique identification number Valve location Date installed Application i.e. type of discharge: bath, shower etc. Risk assessment report number Risk level found (e.g.
  • Page 36 Start Is cartridge due for 1. Measure & record supply temperatures and pressures, if possible (see Commissioning 4.2(a)). replacement? 2. Measure & record blend temperature & flow rate @ maximum flow (see Commissioning 4.2(b)). 3. Measure & record blend temperature & flow rate @ minimum flow (see Commissioning 4.2(c)).
  • Page 37 Note! K = Kelvin, the unit of thermodynamic temperature. The unit "Kelvin" is equal to the unit of "Degree Celsius". Kelvin is used for a difference of Celsius temperature. Guide to In-service Test Frequency Figure6...
  • Page 38 C max) Mixed water temperature at discharge point. † = Rada 215-t3 series approved designations. = Rada 222-t3 series approved designations Note! For washbasins, it is assumed that you are washing under running water. Note! Bath fill temperatures of more than 44°C should only be available when the bather is always under the supervision of a competent person (e.g.
  • Page 39 In order to achieve the safe water temperatures expected of a Type 3 valve it is essential that the valve is used only for the applications covered by its approved designations, with the appropriate water supply pressures and temperatures, and it is commissioned, maintained and serviced in accordance with the recommendations contained in this guide.
  • Page 40 Adjust the temperature of the mixed water in accordance with the instructions in this manual and the requirement of the application and then carry out the following sequence: (a) record the temperature, and pressures if possible, of the hot and cold water supplies.
  • Page 41 SPARE PARTS...
  • Page 46 615 87 Locking screw, all models 408 72 Checkvalve cartridge - 215c 408 75 Checkvalve cartridge - 215bc 408 81 Checkvalve cartridge - 215dk 408 84 Checkvalve cartridge - 222dk Rada 215-t3 series: Strainer and Service Packs component matrix Part ref. Part no. Component...
  • Page 47 NOTES...
  • Page 48 CUSTOMER CARE 1057616-W2-A © Kohler Mira Limited, January 2006...

This manual is also suitable for:

222-t3 series

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