RETURN 0 40 Valves for Hot & Cold Water ½” thermoscopic mixing valve range featuring the unique ‘Radatherm’ technology Revolutionary new thermostat giving better temperature control Optional locked temperature control for extra safety MIXING VALVES Rada 215 Thermoscopic Mixing Safety Service-free thermostat and checkvalve cartridges for low cost maintenance Rada 215-t3 zc Rada 215-t3 bc Rada 215-t3 dk Rada 215-t3 oem Rada 215 dk (less fittings) Rada 215 Rada 215-t3 c MIXING VALVES Dimensions (All dimensions in mm) Rada 215-t3 c Rada 215-t3 bc Rada 215-t3 oem Rada 215-t3 zc Rada 215-t3 dk Rada 215-t3 dk (less fittings) Standard connections are: A range of ½” thermoscopic mixing valves to suit a wide variety of applications and installation conditions. The range incorporates the “Radatherm” cartridge, a unique sealed for life unit utilising materials of proven durability for extended service-free reliablity. The “Radatherm” cartridge employs an advanced thermoscopic temperature sensor to provide water at safe accurate temperatures for ablutionary or process requirements. The mixing valve inlets incorporate check valves and strainers housed within readily accessible cartridges for easy maintenance. Hot inlet - left (marked red) Cold inlet - right (marked blue) Outlet - Top (can be altered to bottom outlet if required). Note: Reversed inlets can be corrected by reversing the position of the Radatherm cartridge within the valve body. Pressure/Flow Rates For optimum performance, supply pressures should be nominally equal. Minimum Pressure Loss: Inlets to outlet, 0.1 bar. Product Range Rada 215-t3 c Exposed model, for mounting on to vertical surfaces such as a wall or panel. Rada 215-t3 bc Semi-concealed model, for mounting into wall cavity or through panels. MIXING VALVES Description Minimum Flow Rate: 3 L/min at mid-blend. Maximum Static Pressure: 10 bar. Maximum Flow Rate: Recommended at 35 L/min. Rada 215-t3 oem Concealed model, duct/box installation. Rada 215-t3 zc Exposed model, for mounting on inlet pipework, suitable for connection to offset connectors (to be sourced locally). Rada 215-t3 dk Concealed model, for mounting into duct spaces, cupboards, cabinets, etc. Rada 215 dk (less fittings) Concealed model, for mounting into duct spaces, cupboards, cabinets, etc. Recommended Minimum Dynamic Supply Pressure: 0.15 bar. Maximum Pressure Loss Ratio*: should not exceed 10:1 in favour of either supply during flow. Pressure Loss Ratio is determined by subtracting the resistance to flow of the outlet pipework and outlet fitting from the dynamic pressures of the hot and cold water at the inlets of the mixing valve. This is at its extreme when the mixing valve is being used at its lowest flow rate and when the maximum inequality occurs in the pressure of the hot and cold water supplies. Flow rate/Pressure loss graph 50 Appearance Rada 215-t3 c, 215-t3 zc, 215-t3 bc and 215-t3 oem Body of chrome plated brass, with chrome plated knob. Rada 215-t3 dk, 215 dk (less fittings) Body of chrome plated brass, white plastic cap. 40 Flow Rate (L/min) Rada 215-t3 Series (excluding 215-t3 dk) is provided with adjustable temperature control which allows the user to select blend water temperature up to a pre-set maximum. Alternatively, a locking cap (supplied) can be fitted to provide a locked temperature setting. 30 Rada 215 20 10 0 0 0.5 1.0 1.5 2.0 Pressure Loss (bar) Flow Control Connections Rada 215-t3 c Inlets and Outlet: ½” BSP male union or 15mm compression. Rada 215-t3 bc Inlets and Outlet: ½” BSP male union or 15 mm compression. Rada 215-t3 series mixing valves do not have integral flow control. Separate outlet flow control - such as tap, stopcock, mechanical timed flow control valve, or solenoid is required. The product chosen should be non-concussive in operation. Temperatures Rada 215-t3 oem Inlets and Outlet: ½” flat-faced male union. The maximum temperature which can be selected is set at approximately 43°C when despatched, but this can be re-set on site as required. Rada 215-t3 zc Minimum temperature differential, blend to either supply is 12°C. Inlets: ¾” BSP female captive nuts to accept offset connectors (to be sourced locally), to allow for variable pipework centres (typically 128-178mm). Outlet: ½” BSP male union or 15mm compression. Inlets and Outlet: ½” flat-faced male union. 2 elbow and one straight union connector are supplied, terminating in 15mm compression connections. Rada 215 dk Inlets and Outlets: ½” flat faced male union. Minimum cold water temperature: 1°C. Maximum hot water temperature: 85°C. Note: The mixing valve can accept temporary temperature excursions above 85°C without damage, however operation of the mixing valve at such elevated supply temperatures is not recommended. For reasons of general safety, hot water storage temperatures should ideally be maintained at between 60-65°C where serving ablutionary applications. Rada 215 Rada 215-t3 dk Optimum thermostatic control range: 30-50°C. MIXING VALVES Performance The full specification performance outlined below for the standard product is achieved with a blend set between 3545°C, supplies of 15°C cold and 65°C hot with nominally balanced pressures. 1. The blended water temperature is maintained within 1°C with a 10°C change in the hot or cold water supply. 2. The blended water temperature is maintained within 1°C when the differential pressure between inlet and the outlet drops by up to 50% on either the hot or the cold side (2:1 PLR). 3. The ‘thermoscopic’ sensor effects a shut-down to seepege within 2 seconds if either supply fails, providing the blend temperature differs from the inlet supply temperatures by at least 12°C. 4. The valve will maintain control with a pressure loss ratio of up to 10:1. 5. Within the 30-50°C working range of the thermostat and with a 50°C difference between supplies an adjustment of 11 angular degrees of the temperature control knob is required to produce a 1°C change in blend temperature when the supply pressures are maintained equal. Maintenance, Repairs and Replacements Refer to separate Product Manuals for detailed instruction. For further information on replacement parts and services: Tel: +44 1242 282527 Fax: +44 1242 282404 Technical Services • Backed with expert Rada after sales support. • Technical advice on all aspects of pre and post-installation. • On-site surveys and technical support. • Unrivalled experience and expertise in providing for the commercial washroom.