Rada-Presto TF2020 and TF2020S 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
INDEX Page INTRODUCTION 3 DESCRIPTION 3 SAFETY:WARNINGS 3 PACK CONTENTS 4 DIMENSIONS 5 SPECIFICATION 6 INSTALLATION 8 COMMISSIONING 9 OPERATION 14 FAULT DIAGNOSIS 15 MAINTENANCE 16 SPARE PARTS 23 ACCESSORIES 25 CUSTOMER CARE Back Cover 2
INTRODUCTION Rada-Presto taps are specified to meet the highest standards of safety, comfort and economy as demanded by today s users. All Rada products are designed, manufactured and supported in accordance with accredited BS EN ISO 9001:1994 Quality Systems. The taps are vandal-proof 1/2" push action mixer taps suitable for washbasin installation. They incorporate an automatic time delayed shut-off, self cleaning mechanism and internal components manufactured from anti-corrosion and anti-liming materials. The TF2020S model incorporates a security "S" cartridge to prevent continuous flow should the push-button be deliberately held down. Product range DESCRIPTION Rada-Presto TF2020 chrome 1/2" for individual washbasin installation, supplied with seat joint, sealing washer, joint and stainless steel flexible couplings with 1/2" rotating nuts. The tap body and push-button are chrome plated brass. A grey skirt indicates mixed water supplies. Rada-Presto TF2020S chrome 1/2" for individual washbasin installation and incorporating the security "S" cartridge is supplied with seat joint, sealing washer, joint and stainless steel flexible couplings with 1/2" rotating nuts. The tap body and push-button are chrome plated brass. A grey skirt indicates mixed water supplies. SAFETY: WARNINGS Rada products are precision-engineered and should give continued superior and safe performance, provided: 1. They are installed, commissioned, operated and maintained in accordance with the recommendations given in this Manual 2. Periodic attention is given, as necessary, to maintain the product in good functional order. Recommended guidelines are given in the MAINTENANCE section. Provided it is installed, commissioned, operated and maintained within these recommendations, the risk of failure, if not eliminated, is reduced to the minimum achievable. 3
PACK CONTENTS Tick the appropriate boxes to familiarize yourself with the part names and to confirm that the parts are included. TF2020 and TF2020S 1 x Sealing Washer 1 x Joint Seal 1 x Joint 1 x TF2020 or TF2020S 1 x Fixing Nut 3 x Stop Pins Note: Two are already installed in temperature adjustment lever. 2 x 1/2 Adaptor 2 x Strainer Seals 2 x Plastic Washer 2 x Compression/ flat-face adaptors 1 x Product Manual 4
DIMENSIONS TF2020 and TF2020S 126 66 23 127 NOTE:- NOT TO SCALE - All dimensions are in millimetres 5
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 o C between the hot and cold inlet temperatures, and with differentials of 15-35 o C between the blend setting and either supply. - daily usage of 1-6 hours. - installation and usage environment not subject to extremes of temperature, unauthorised tampering or wilful abuse. Other Applications For information on other specific applications or suitability, refer to Kohler Mira Ltd, or Local Agent. Disinfection In applications where system chemical disinfection is practised, chlorine can be used (calculated chlorine concentration of 50 mg/l (ppm) maximum in water, per one hour dwell time, at service interval frequency). Such procedures must be conducted strictly in accordance with the information supplied with the disinfectant and with all relevant Guidelines/Approved Codes of Practice. If in any doubt as to the suitability of chemical solutions, refer to Kohler Mira Ltd, or Local Agent. Pressures and Flow Rates For optimum performance, dynamic supply pressures should be nominally equal. Recommended Minimum Running Pressure: 0.15 bar (with regulator removed). Recommended Maximum Static Pressure: 10 bar. Time cycle: Preset to approximately 10 seconds, subject to site conditions (Low water pressures may reduce this time period. High water pressure may increase this time period). Time duration may be increased in six graduated steps to approximately 16 seconds (See COMMISSIONING) 6
Flow rates: Flow Curves For conservation of energy and water, an economical flow rate may be obtained by setting the internal flow adjuster to one of five positions. The graph shows the flow rates for each of the five positions for all models. All taps are fitted with a flow straightener and are supplied adjusted to position S4. Note: An optional flow regulator (4 litres/min.) is also available as a spare. TF2020 and TF2020S Low Pressure Flow Rate (l/min) 12.5 S5 10 S4 7.5 S3 5 2.5 S2 S1 0 0 0.5 1 1.5 2 Running Pressure (bar) TF2020 and TF2020S High Pressure Flow Rate (l/min) 20 15 10 5 S5 S4 S3 S2 S1 0 0 1 2 3 4 5 6 Running Pressure (bar) Connections: Inlet supply connections are made via 2 x 1/2" BSP female nuts at the end of flexible inlet tails. 7
INSTALLATION Fit to Basin Important! Flush supply pipework thoroughly before connection. 1. Remove retaining nut, pipe clamp and rubber gasket from mixer tap. 2. Connect flexible tail connectors. Make sure O-rings are fitted correctly. 3. Fit tap to basin. Make sure basin sealing ring is concentric with the mixer tap body. O-rings Basin Tap Body Rubber Gasket Pipe Clamp Retaining Nut 4. Fit rubber gasket and pipe clamp. Screw on retaining nut. Flexible Tail Connectors 5. Connect the flexible tail connectors to the 1/2 Adaptor (Make sure the plastic washers are in place). Note! Check valves are located in the flex tails. 6. Fit the strainers seals supplied to the checkvalve assemblies. 7. Fit 15mm compression isolating valves (not supplied) using the flatface adaptors supplied. 8. Refer to COMMISSIONING before operating the mixer tap. Flexible tail connector Plastic washer 1/2" Adaptor Strainer Seal Flat-face adaptor 15mm compression isolating valve (not supplied) 8
COMMISSIONING Commissioning must be carried out in accordance with these instructions, and must be conducted by designated, qualified and competent personnel. Commissioning Checks 1. Turn on water supplies to the tap. 2. Operate the tap (see section OPERATION) and check: - Flow-rate is sufficient for purpose. - The connection to the supply is watertight. The flow control and flow time are preset at manufacture, however both may be adjusted, see below. Flow Rate Control Setting The TF2020 and TF2020S are factory set to flow position S4. Should the installation pressures require adjustment of the flow rate, any one of the five different flow rate positions, S1 to S5 may be selected, with S5 being the least restrictive. Adjust the flow rate as follows: 1. Isolate the water supply. Remove the tap knob and unscrew the head assembly (see MAINTENANCE). 2. Remove the head assembly and attached cartridge. 3. Turn the adjusting ring (coloured black on the TF2020 and green on the TF2020S) on the cartridge clockwise or anticlockwise according to the flow rate required (see Figure 1 and Flow Rate Adjustment Chart). Note: Taps are supplied set in position S4. 4. Install the cartridge and head assembly into the body (see MAINTENANCE). 9
+ - Flow Rate Control Setting Adjustment Figure 1 Position Visible aperture S1 S2 S3 S4 S5 (Refer to flow curves chart for pressure/flow rates) Flow Rate Adjustment Chart 10
Flow Time Duration Setting (Refer to Figure 3) The flow time duration setting has been factory set in position 6, which gives approximately 10 seconds flow duration, but can be adjusted if required. A special tool is available from Customer Support, free of charge (see ACCESSORIES). There are six possible positions, which are set as follows: 1. Remove the knob (see MAINTENANCE). 2. Insert the special tool into the black upper stop and turn to the desired setting. As the black ring is rotated, a lug will appear in the window in the skirt. It is important that the black ring is adjusted so that the lug is positively located in the window in one of the six positions. To increase the time duration, turn the black ring clockwise. Each position changes the duration by approximately one second (position 1 = approximately 16 seconds, position 6 = approximately 10 seconds). Upper Stop - Special Tool Skirt Window + Flow Time Duration Setting Figure 3 11
Flow Regulator (Refer to Figure 4) An optional flow regulator is available as a spare and must be installed as shown in Figure 4. This will provide a comfortable flow of about 4 l/min at a pressure of between 1 and 10 bar. Note: The flow regulator will not function at pressures less than 1 bar. Flow Regulator Flow Regulator Figure 4 Flow Straightener Hot Water Temperature Control (Refer to Figure 5) The maximum outlet water temperature can be limited by inserting stop pins (supplied) into the mixer lever. The stop pins limit the mixer lever travel. Insert the stop pins as follows: Note: The TF2020 and TF2020S are supplied with two pins fitted. This limits the maximum blend temperature to 40 o C, providing the hot supply temperature does not exceed 60 o C. 1. Remove the mixer lever (see MAINTENANCE). 2. Insert the stop pins on the mixer lever as required (see chart at Figure 6) and tap home with a mallet or other suitable tool. 12
Mixer Lever Stop Pins Mixer Lever Figure 5 For a 40 C outlet water temperature with a hot water inlet temperature of 50 C fit one pin. For a 40 C outlet water temperature with a hot water inlet temperature of 60 C fit two pins. For a 40 C outlet water temperature with a hot water inlet temperature of 70 C fit three pins. 1 Stop 2 Stops 3 Stops 50 o 60 o 70 o Mixer Lever Temperature Setting Chart Figure 6 13
OPERATION TF2020 The TF2020 is simple to use. A firm push on the tap knob starts the water flowing for the duration of the flow timing. The water temperature and flow timing is factory set, but this can be altered (see COMMISSIONING). If the tap knob is pushed again whilst the tap is flowing a further preset cycle will commence. TF2020S The TF2020S is fitted with a security "S" cartridge. The tap is operated by a firm push on the tap knob, however, flow will not commence until the tap knob is released. The water temperature and flow timing is factory set but this can be altered (see COMMISSIONING). If the tap knob is pushed again whilst the water is flowing the flow will cease. The tap knob has to be released again to achieve water flow. 14
FAULT DIAGNOSIS Symptom 1. Tap not working. (No flow) 2. Tap will not shut off. 3. Tap shuts off too quickly. Cause/Rectification a. Check Inlet supplies. b. Remove the cartridge and clean the mechanism under running water: refer to MAINTENANCE for removal. Note: Cartridges may only be cleaned by flushing through under a jet of clean water to remove lodged particles. Do not descale. Cartridges are not serviceable, and must not be dismantled. a. Check the piston seal for cleanliness. b. Ensure that the spindle spring slides freely in its aperture. Refer to MAINTENANCE for removal. a. Check the cleanliness of the sealing cap in the piston. b. Check the spindle spring for damage. Refer to MAINTENANCE for removal. 15
General MAINTENANCE Rada products are precision-engineered and should give continued superior and safe performance, provided: 1. They are installed, commissioned, operated and maintained in accordance with our recommendations 2. Periodic attention is given as necessary to maintain the product in good functional order. Guidelines for frequency are given below. The maintenance requirement for taps in this series is minimal and concerns temperature, performance and functional checks and inspection, with cartridge renewal when necessary. In larger installations with a number of taps, it is good policy to maintain a small stock of cartridges so that no tap need be out of commission for more than the time it takes to exchange the cartridge. The minimum designed service life of all cartridges used in our products is five years under normal operating conditions. However, when supply conditions and/or usage patterns do not conform to 'normal operating conditions' the cartridge may need to be replaced more frequently (refer to SPECIFICATION for 'normal operating conditions'). The use of main supply-line or zone strainers (with a recommended maximum mesh aperture dimension of 0.5 mm) will reduce the need to remove debris at each shower control point. Rada Service Engineers/Agents will call by prior arrangement, if required. Service Contracts may be undertaken, subject to survey - details upon request. 16
Preventative/Precautionary Maintenance (Planned Maintenance Programmes) The frequency and extent of attention required will vary according to prevailing site and operational conditions however, the following guideline schedule is suggested to cover average duty and site conditions: Six-monthly Performance: check flow rate control and time delay are fit for purpose. Refer to COMMISSIONING for adjustment. Visual: check external component condition. Inspect for scale deposition, deformation, damage, corrosion, etc. Maintain or renew as necessary. Lubricate applicable components using only silicone-based lubricant. Lubricants Important: Use only silicone-based lubricants on this product. Do not use oilbased or other lubricant types as these may cause rapid deterioration of seals. Standard silicone-based lubricants may be used on all static seals, and threads, to assist refitting (e.g. Rocol MX22). Maintenance Procedures Maintenance must be carried out in accordance with these instructions, and must be conducted by designated, qualified and competent personnel. This tap series is designed for minimal maintenance under conditions of normal use. External surfaces may be wiped clean with a soft cloth, and if necessary, a mild washing-up type detergent or soap solution can be used. Caution: many household and industrial cleaning products contain mild abrasives and chemical concentrates, and should not be used on polished, chromed or plastic surfaces. 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-Presto TF2000, and identify part name and number (refer to the Spare Parts List). Protection against freezing: Turn off the incoming supply and push the tap several times to drain the system. Remove the cartridge (see Removal). 17
Removal - TF2020 and TF2020S Knob (Figure 7) Note: The knob is under spring pressure. 1. Lift the flap using the end of a small flat-ended screwdriver. 2. Insert a 3mm hexagonal key in the hole under the flap and engage it in the knob hexagon. Turn it 1 / 2 a turn anticlockwise against the stop - do not force it. 3. Remove the hexagonal key from the knob hexagon and pull off the knob. Remove the spring from inside the knob. 3 mm Hexagonal Key 1 2 3 Knob Removal Figure 7 18
Skirt and Cartridge (Figure 8) 1. Remove the knob. 2. The skirt is a push/pull fit located in the tap body by a protruding dowel. Pull the skirt free of the tap body. 3. Unscrew the head nut from the tap body with the special tool or a suitable box spanner. 4. Remove the head assembly and the attached cartridge. Special Tool Upper Stop Head Nut Skirt Skirt and Cartridge Removal Figure 8 Flow Straightener (See Figure 9) 1. Insert the special tool in the flow straightener spout and unscrew anticlockwise. Flow Regulator (Optional) Flow Straightener Special Tool Flow Straightener Removal Figure 9 19
Mixer Lever (See Figure 10) Remove the mixer lever by unscrewing the hexagonal nut at the base. A 4 mm hexagonal key (not supplied) is required for this operation. Lift off the lever. 4 mm Hexagonal Key Mixer Lever Mixer Lever Removal Figure 10 20
Assembly - TF2020 and TF2020S Skirt and cartridge (Figure 11) 1. Insert the cartridge into the tap body with the special tool or suitable box spanner and tighten. 2. Fit the seal to the outer groove of the skirt. Align the protruding skirt dowel with the drilled recess in the tap body and push firmly into place. 3. Using the special tool, adjust the time delay ring to the desired setting if required (see COMMISSIONING). Special Tool Upper Stop Head Nut Skirt Skirt and Cartridge Assembly Figure 11 Knob (Figure 12) 1. Lift the flap on the skirt using the end of a small flat-ended screwdriver. 2. Insert the spring in the knob, place the knob on piston rod and push down against the spring pressure. 3. Insert a 3mm hexagonal key in the hole under the flap and engage it in the knob hexagon. Then turn it 1/2 turn clockwise to engage in the cartridge piston rod groove do not over tighten it. Withdraw the hexagonal key and close the flap. 3 mm Hexagonal Key Knob Assembly Figure 12 21
Flow Regulator Option (See Figure 13) 1. An optional 4 l/min flow regulator may be purchased (see SPARES). 2. Remove the flow straightener using the special tool (available from Customer Support) 3. Insert the flow regulator into the back of the flow straightener. 4. Install the flow straightener/regulator assembly using the special tool. Flow Regulator Flow Straightener Special Tool Mixer Lever (See Figure 14) Flow Regulator Assembly Figure 13 Insert the mixer lever into the tap body and secure with the hexagonal nut at the base of the mixer lever. A 4 mm hexagonal key (not supplied) is required for this operation. 4 mm Hexagonal Key Mixer Lever Mixer Lever Assembly Figure 14 22
Rada-Presto Spare Parts SPARE PARTS 408.71 Flat-faced Inserts (3) 887.16 Cartridge (TF2020) 887.19 Cartridge - anti-blocking (TF2020S) 887.14 Flow straightener/flow regulator set 887.13 Grey skirt 887.15 Knob set (TF2020) 887.18 Knob set (TF2020S) 887.17 Temperature lever assembly 887.27 Strainer Seal 887.29 Spring (TF2020s) 887.39 FlexibleTail Assembly (Pair) 23
Rada-Presto TF2020 and TF2020S Spare Parts Diagram 887.15 887.18 887.13 887.29 (TF2020S only) 887.16 887.17 887.14 887.19 887.39 887.27 408.71 24
ACCESSORIES The Special Tool 887.20 and 3 mm Hexagonal Key are available to aid maintenance and flow duration adjustment. They are available from Customer Support, free of charge upon request. Special Tool with 3mm Hexagonal Key 887.20 25
REVISIONS AND CORRECTIONS August 2002 - Revision: P3664/1 to P3664/2 Page Format Status Summary of Revisions 23 T A New spare part (887.29) added. 24 I A New spare part (887.29) added. B T R New date and issue changed. Key T = Text I = IIlustration A = Addition R = Revision B = Back cover F = Front cover 26
NOTES 27
Guarantee CUSTOMER CARE This product is guaranteed against any defect of materials or workmanship for one year from the date of purchase, provided that the product has been installed correctly and used in accordance with the instructions supplied. Any part found to be defective during the guarantee period will be replaced or repaired - at our option - without charge, provided that the product has been properly used and maintained. Routine cleaning and maintenance should be carried out in accordance with the instructions supplied. The product should not be modified or repaired except by a person authorised by Rada. Your statutory rights are in no way affected by this guarantee. After Sales Service - how we can help you We have a network of fully trained staff ready to provide assistance, should you experience any difficulty operating your Rada equipment. Spare Parts All functional parts of Rada products are kept for up to ten years from the date of final manufacture. If during that period, our stock of a particular part is exhausted we will, as an alternative, provide an equivalent new product or part at a price equating to the cost of repair to the old, bearing in mind the age of the product. Customer Care Policy If within a short time of installation the product does not function correctly, first check with the operation and maintenance advice provided in this Manual to see if the difficulty can be overcome. Failing this, contact your installer to ensure that the product has been installed and commissioned in full accord with our detailed installation instructions. If this does not resolve the difficulty, please ring your nearest Rada contact who will give every assistance and, if appropriate, arrange for the local Service Engineer or Agent to call on a mutually agreeable date. Contact: Rada Controls Kohler Mira Ltd Cromwell Road, Cheltenham, England, GL52 5EP, UK. Tel.: + 44 (0)870 600 0221 Fax.: + 44 (0)1242 221925 P3664/1 Rada is a registered trade mark of Kohler Mira Limited. The company reserves the right to alter product specifications without notice. 28 Kohler Mira Limited, April 2004