Thermostatic MODEL RP12PT 240V For Service & Installation contact: BBT NORTH AMERICA Bosch Group 340 Mad River Park, Waitsfield, VT 05673 - 800-798-8161 www.boschpro.com IMPORTANT : This booklet should be given to the customer after installation and demonstration. 1 Important Safety Instructions When using this electrical equipment, basic safety precautions should always be followed, including the following: 1. Read and follow all instructions. 2. This appliance must be grounded. 3. Disconnect this product from the electrical supply before cleaning, servicing or removing the cover. 4. lo reduce the risk of injury, close supervision is necessary when the product is used near children or elderly persons. 5. Warning: Do not install the heater in a location where it may be subject to freezing. 6. Warning: Do not install a check valve or any other types of back flow preventer within six feet of the cold water inlet. 7. The electrical insulation must conform to current National Electrical Codes. 8. Warning: Do not switch the heater on if you suspect that it may be frozen. Wait until you are sure that it has completely thawed cut. 9. The Powerstream Pro is designed to heat potable cold water for domestic purposes. Contact Bosch Water Heating before specifying or installing the appliance in any other application. 10. Additional Canadian Safety Instructions a) A green terminal (or wire connector marked "G", "GR", "GROUND", or "GROUNDING") is provided within the control box. To reduce the risk of electric shock, connect this terminal or connector to the grounding terminal of the electric service of supply panel with a continuous copper wire in accordance with the Canadian Electrical Code, Part 1. b) This product shall be protected by a Class A ground fault circuit interrupter. Contents Using the Powerstream Pro Installing the Powerstream Pro Spare parts Starting up the Powerstream Pro How the Powerstream Pro works Trouble shooting Warranty Cover 3 3 5 6 7 8 Back Save these instructions Keep this guide in a safe place once your Powerstream Pro unit has been installed. You may need to refer to it for general instructions or future maintenance. 2 Using the Powerstream Pro Warning Do not use the unit if you think it may be frozen, as this could result in serious damage to the unit. Wait until you are sure-it has completely thawed out before you switch it on. Sink · Check that the power is switched on at the circuit breaker panel. · Turn on the hot tap FULLY If you do not turn the tap full on, you will find that the temperature of the water may vary The hot water can be adjusted by altering the temperature dial and correctly setting the flow rate. Refer to appendix on page 10 - correct flow vs. temperature, · If the unit has been used recently, run the water through for a few seconds to let the temperature settle down. You may initially get a short burst of very hot water from the unit, · It a second tap connected to the unit is also turned on, the hot water will be shared between the two, therefore the flow and/or the temperature of the water will decrease. Installing the Powerstream Pro Warning Do not install the Powerstream Pro in a room: where there is a chance of freezing. IMPORTANT - Read entire instructions Check the pressure of the main water supply. To operate correctly the unit needs the following running pressures:Sink Min: 20psi (1.4 bar) Max: 150psi (10.3 bar) Securing the unit to the wall Deciding the position · If being used in a public place, position the unit out of reach to discourage vandalism. · Mount the unit onto a flat section of wall, well away from any potential splashes of water or spray. · Position the unit lengthways (diagram 1.) Remember to keep the length of hot water pipe to a minimum in order to save energy. · If the unit is to supply a sink, you can It it either above or below the sink. Warning Unit must be mounted as shown 'Lengthways' with plumbing connection pointing down. Under no circumstances should the unit be mounted differently. 3 Deciding the wiring route · You have a choice of whether to feed the electric cable through the side or through the back of the unit, · If it is gong to be through the side of the unit, cut out the plastic lug to expose the rubber sleeve (diagram 2.) Plumbing in the unit Fitting the pipes · The unit should be connected directly to the main cold water supply and not to preheated water. The unit should be installed with service valves on both the inlet and outlet. · We recommend that you use ½" copper or high pressure flex connections. · Use Teflon tape for sealing pipe threads. Do NOT use pipe dope. · Remember to keep the hot water pipe runs as short as possible. In some cases it may be worth fitting a second unit to serve an additional fixture. · If the unit is to supply more than one sink, a similarly flow restricted · If it is going through the back of the unit, cut aerator should be used at each tap. through the grommet on the backplate with a If not, the highest flowing outlet will sharp knife. Make sure that you do not remove take all the water under dual usage. the grommet from the backplate (diagram 3.) Feed the cable through the grommet before · After the unit has been plumbed in, and you mount the unit to the wall. If you are before you wire it, flush it with water to using an approved cable fitting, remove the remove any debris or loose particles. grommet. Failure to do so may make the unit inoperable. Connecting the unit to the pipes · The inlet and outlet are clearly marked on the unit. They each have a ½" NPT connector. · Install a ball valve in the cold water line. This valve can be used to turn off the water supply to the unit if it needs servicing, or to reduce the water flow if it is too high. · If the unit is to supply a sink, we recommend that you use aerators, which you can get from your local distributor/dealer. · As a condition of installing this product in the Commonwealth of Massachusetts a pressure relief valve must be installed on the cold water side by a licensed plumber. MGL 42 Section 19. Mounting on the wall · Undo the retaining screws on the cover and take the cover of the unit. Hold the backdate in position against the wall while you mark the four mounting holes. · Drill the holes and secure the unit to the wall using the four no. 8 wood screws supplied WARNING - IMPORTANT Do not install a non-return check valve within 6 feet of the inlet. 4 WARNING The unit must be installed by a qualified electrician. The unit must be grounded. Connecting the unit to power. Making the electrical connections Rated Rated Recommended Voltage Current Wire Size Model (V) (A) (AWG) RP12PT 240 50 6 · Make sure that all the terminal block screws are tightened securely. Loose connections can cause wires to neat up. · Make sure that the ground wire is wrapped around its terminal stud and into the saddle washer. The nut should be tightened securely. · Attach the front cover and tighten the retaining screws. Spare Parts 93793749 12 kW Heat Exchanger (Thermostatic) 93793701 Backplate 93793703 Terminal Block 93793812 Front Cover (Thermostatic) 93793765 Thermal Cut-cut 93793751 Wiring Assembly (Thermostatic) 937937C9 Cable Clamps & Rubber Boot 93793752 Cover Retaining Screws 93793753 12 kW Printed Circuit Board (Thermostatic) 93793754 Nameplate 93793755 Brass Inlet Assembly For further information ask your local dealer: FOR SERVICE AND INSTALLATION QUESTIONS CALL TOLL FREE: 800-798-8161 www.boschpro.com Bosch Water Heating 340 Mad River Park, Waitsfield. VT 05673. · Strip back the insulation on the power wires about 3/8". Any insulation on the ground should be stripped back about 3/4" · Feed the cable through the side or rear entry grommets, as appropriate. · Connect the cables to the terminal block and ground stud. (diagram 4.) When the Powerstream Pro is not within sight of the electrical circuit breakers, a circuit breaker lockout or additional local means of disconnection for ail non grounded conductors must be provided that is within sight of the appliance. (REF NEC 422.31) 5 Starting up the Powerstream Pro Checking for leaks · Lot the water run through the unit for a few seconds. Check that no pipe joints leak. Adjusting the flow Turn the service valves on, then · Turn on the hot tap fully at the sink · Adjust the outlet service valve till the water cones out of the tap at the recommended flow rate for the required temperature. Refer to Appendix on page 10 : Correct flow vs. Temperature. If the required temperature is different from the factory setting 113°F (45°C), turn the Adjustment Spindle (Diagram 5) until the outlet temperature is correct. · Check that the unit works correctly when the sink tap is closed and then opened again; if not adjust the service valve slightly. · The outlet shut off valve can be used to regulate temperature or flow of water from the unit. When using the hot water open the tap fully so that the water temperature is always the same. If hotter water is desired adjust the temperature dial and flow rate as recommended in the Appendix on page 10. Note: If the unit is servicing a single lever faucet you may need to restrict the cold water supply to the faucet to balance water pressure and improve performance. IMPORTANT Before leaving the site, the installer should demonstrate the unit to the user and give him/her this guide. 6 How the Powerstream Pro works Water comes in through the inlet tube. The flow switch senses water has passed through the unit. If it detects more than the preset level, the units heating the elements switch on. This is shown by the neon light glowing. The water is heated instantly as it passes through the copper heat exchanger tube. The unit is Thermostatic i.e. it will switch the elements on and off in order to maintain a constant outlet temperature. The temperature of the water conning out of the unit depends on:· The voltage of the electrical supply, · The temperature of the incoming water. · The setting of the temperature dial. A badly set flow rate can also have a negative effect on the temperature. Depending on the region of the country, the temperature of the water supply can vary from 40°F in winter to about 70°F in the summer, with an average of about 50°F. Extreme weather conditions can cause the inlet temperature to go outside these boundaries, making it necessary to adjust the Temperature Adjustment Spindle and / or the inlet water flow. The unit has one double pole thermal cut out which is mounted on the heat exchanger tube. When tripped the cut out needs to be reset manually inside the unit. The cut-out will trip only in exceptional circumstances (Diagram 7.) Call your service person or Bosch Water Heating if this happens frequently. WARNING Always switch off the electrical supply to the unit before you remove the cover. 7 FOR THE INSTALLER SYMPTOM Cold water only -neon light off. CAUSE Electricity not on The water supply is connected to the OUTLET of the unit. The high temperature thermal cut out has tripped WHAT TO DO Check electrical supply. Reconnect the water supply to the INLET (marked in blue) Reset it by opening the unit and pushing the button on the cutout (diagram 7). Before you do this you must find the cause of the problem. Turn off the power and observe if the flow switch activates when the water is turned on. If not contact BBT 800-798-8161 www.boschpro.com Adjust water flow to recommended flow rate. Switch off the electricity and check the resistance of the elements. Check the supply voltage to the heater. Ensure that the temperature dial is in the correct position for the flow of water. Check the plumbing. Only use Teflon tape for sealing pipe joints. The flow switch is not working. Water too cold -neon light on. Water flow too high for unit to control One element is not working. The power supply voltage has dropped. Temperature is turned too low. Water flow too low, or temperature too high. There are restrictions in the plumbing. 8 FOR THE USER SYMPTOM Little or no water flows. Cold water only -neon light off. Cold water only -neon light on. CAUSE The water supply is turned off. The flow is not high enough to activate. The water flow rate is too high. The flow rate is correct The inlet water temperature has dropped. Water flow rate too The hot tap is not fully open low, or temperature too high. WHAT TO DO Turn on the main supply fully at the stop valve. Open the inlet service valve fully. Adjust the flow rate. Adjust the temperature dial on the front of the cover. Adjust the flow rate. Adjust the stop/ball valve so that water is at the right temperature with the tap fully open. Always turn the hot tap fully on. If the problem persists The person who initially installed the unit is probably the best one to contact for help. You can also call BBT at 800-798-8161 or visit www.protankless.com/tech. Please have this guide with you when yo ...