BOSCH RP17PT PDF

See: TWH E Reconnect the water supply to the inlet of the unit marked blue. Try resetting each cutout by pushing the red reset button located in the center of the cutout. Establish and fix the cause of the overheating. Obstructions in the water path can restrict the flow of water through the heater causing it to overheat. Ensure the heater is not being fed preheated water.

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See: TWH E Reconnect the water supply to the inlet of the unit marked blue. Try resetting each cutout by pushing the red reset button located in the center of the cutout.

Establish and fix the cause of the overheating. Obstructions in the water path can restrict the flow of water through the heater causing it to overheat. Ensure the heater is not being fed preheated water.

This water heater is designed for a cold water feed only. If thermal cut outs keep tripping, check for continuity through the elements. Close installer supplied cold water shut off valve if none installed, install before proceeding.

Open all hot water taps supplied by the heater. Wait 10 minutes and check all faucets. Any water running is a sign of a plumbing crossover. Consult a local plumber or service person for help in correcting a plumbing crossover. To return the heater to service, reinstall cover, open the inlet water supply to the heater and open all hot water taps.

Let all taps run until there is no air coming out of the fixtures. Shut off all hot water taps. Turn power supply on to the heater. Return heater to service. Observe if the flow transducer "spins" when the water is turned on. Please note the flow transducer spins at a high speed and can appear to be stopped when actually spinning. It is recommended to observe the flow transducer without water flowing, then turn on a hot water tap while observing the flow transducer. If the flow transducer is not spinning remove, and flush flow transducer.

Contact Technical Support if flushing does not work. Refer to Graph 1 on Page 8 of the manual. Turn temperature knob located on the bottom of the water all the way clockwise for maximum temperature setting. Use of an isolation valve on the hot water outlet to control flow rate is recommended.

Check the supply voltages. Use an ohm meter to verify correct resistance on each element. If readings are different than listed specifications, contact Technical Support for further instruction. Verify proper flow on the outlet side of the heater with the hot water pipe disconnected. Maximum flow rates for each unit are as follows. For people on well systems, the recommended pressure range is psi. RP17PT - 2. This water heater is not designed for preheated water or recirculation applications.

Increase flow rate where ever possible. Replacing low flow showerheads and aerators with higher flowing GPM ones may be necessary. This requires a lot of cold water to be added with it in order to attain a useable hot water temperature. The addition of too much cold water will overpower hot water demand from the tankless water heater.

This slows the flow within the tankless water heater, decreasing it below activation point, which shuts off the heater. The end result is nothing but cold water coming out of the outlet. The minimum water pressure for the home should be 30psi or greater. For people on well systems the minimum pressure range is psi. Increases from one major fixture running to multiple fixtures running at one time can cause the temperature to fluctuate. Warning: If you are unable to perform the tasks listed below, or need additional assistance please contact your original installer or a licensed gas technician.

Service Bulletins.

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See: TWH E Reconnect the water supply to the inlet of the unit marked blue. Try resetting each cutout by pushing the red reset button located in the center of the cutout. Establish and fix the cause of the overheating. Obstructions in the water path can restrict the flow of water through the heater causing it to overheat. Ensure the heater is not being fed preheated water.

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