32 36,000 Temperature °F Value in resistance 35.6 33,500 (1 0f 3) 78.8 11,900 39.2 30,900 82.4 10,850 42.8 28,200 86 9,800 46.4 25,600 89.6 9,100 50 23,000 68 15,000 53.6 21,400 E-19 error is 71.6 14,000 57.2 19,900 75.2 12,900 60.8 18,100 78.8 11,900 64.4 16,600 82.4 10,850 68 15,000 86 9,800 71.6 14,000 89.6 9,100 75.2 12,900 93.2 8,500 96.8 7,900 referring to the T2 return sensor reading a value of more than 212°F. 100.4 7,200 104 6,500 Verify the current supply temperature with a digital 113 5,600 clamp-on thermometer connected to the return 122 4,600 pipe directly below the heat exchanger: 131 4,000 Disconnect the Molex connector from the T2 return sensor. This sensor reads 140 3,400 12K at 77 °F, see resistance chart on 158 2,300 page 3 for additional 176 1,700 temperatures and resistance values. 194 1,300 Using a digital multimeter, read the resistance value of your sensor and confirm your reading with the chart on page 3. -If the resistance value is much higher or lower than the actual temperature per the resistance chart, replace the sensor. Check for any external heating sources, such as a wood boiler piped into the existing boiler loop. If this boiler is running in conjunction with the Rinnai boiler it could be overheating the system’s water. Disconnect or isolate other external sources. Inspect connector at both the T2 sensor and MCBA for loose, damaged or broken fittings or connections. Replace any defective components or wiring harnesses found. Inspect all T2 sensor connectors, wiring harnesses and pins for any signs of moisture or corrosion. Replace all fittings or harnesses found to have corrosion on them. Locate and correct the source of the moisture. Possible causes, cross contamination from the venting,
32 36,000 35.6 33,500 39.2 30,900 42.8 28,200 46.4 25,600 50 23,000 53.6 21,400 57.2 19,900 60.8 18,100 64.4 16,600 68 15,000 71.6 14,000 75.2 12,900 Temperature °F Value in resistance 78.8 11,900 82.4 10,850 86 9,800 89.6 9,100 68 15,000 71.6 14,000 75.2 12,900 78.8 11,900 82.4 10,850 86 9,800 89.6 9,100 93.2 8,500 96.8 7,900 100.4 7,200 104 6,500 113 5,600 122 4,600 131 4,000 140 3,400 158 2,300 176 1,700 194 1,300 (1 0f 3) E-19 error is referring to the T2 return sensor reading a value of more than 212°F. Verify the current supply temperature with a digital clamp-on thermometer connected to the return pipe directly below the heat exchanger: Disconnect the Molex connector from the T2 return sensor. This sensor reads 12K at 77 °F, see resistance chart on page 3 for additional temperatures and resistance values. Using a digital multimeter, read the resistance value of your sensor and confirm your reading with the chart on page 3. -If the resistance value is much higher or lower than the actual temperature per the resistance chart, replace the sensor. Check for any external heating sources, such as a wood boiler piped into the existing boiler loop. If this boiler is running in conjunction with the Rinnai boiler it could be overheating the system’s water. Disconnect or isolate other external sources. Inspect connector at both the T2 sensor and MCBA for loose, damaged or broken fittings or connections. Replace any defective components or wiring harnesses found. Inspect all T2 sensor connectors, wiring harnesses and pins for any signs of moisture or corrosion. Replace all fittings or harnesses found to have corrosion on them. Locate and correct the source of the moisture. Possible causes, cross contamination from the venting,
2016%20Boiler%20Knowledge%20Base%2004152016GW.docx