Presentation on theme: "Residential Gas – Honeywell Valve - Thermopile Powered Series 300/301."— Presentation transcript:
Residential Gas – Honeywell Valve - Thermopile Powered Series 300/301
Atmospheric Vented Category I Status LED Wrap-around Filter
Introduction Installation Operation Service
Gas Valve/Thermostat Spark Igniter Button LED Status Light Status Codes Thermopile Powered
Gas Valve/Thermostat Propane Gas Valve/Thermostat Color Coding
Installation – Gas Supply GasMaximum Supply Press. Manifold Gas Press. Natural10.5 In WC5.0 In WC Propane13.0 In WC10.0 In WC
Installation - Piping
Installation – Combustion Air 12.5 Cubic Feet of Air Per 1000 Btu 1,000 BTU 1,000 BTU + 10 CU. FT. COMB. AIR 10 CU. FT. COMB. AIR 2.5 CU. FT. EXCESS AIR 2.5 CU. FT. EXCESS AIR
Operation - Thermopile Powered A grouping of thermocouples into one housing results in a Thermopile or Generator Heat on the thermopile, generates 750 to 850 milli- volts (.750VDC) – open circuit. When heated and connected to the gas valve, ours generates 350 or more mV - closed circuit.
Operation - Lighting the Pilot Note This Comment
Note this comment Operation – Lighting the Pilot The pilot cannot be relit if this steady LED light is still ON. The thermopile must cool to automatically reset the control.
Operation – Lighting the Pilot Status Indicator –Blinking once every 3 seconds = pilot knob may be released and normal operation in HEAT mode. –Solid On – control has been turned Off – thermopile cooling –2 to 8 flashes every 3 seconds – error codes
Operation - Temperature Adjustment DialApprox. Temp ° F VAC55 HOT120 VERY HOT °F is the recommended setting
Review Questions 1.Natural Gas – maximum gas supply pressure? 10.5 Inches WC
Review Questions 2. Since these products get combustion air directly from outdoors, indoor air supply does not matter? They do NOT use air directly from outdoors. They use room air for combustion and therefore room air quality and quantity is very important.
Review Questions 3. Thermopile – This is a misspelling of thermocouple? No – a thermopile is like a grouping of thermocouples into one housing. This results in a much stronger DC milli-voltage output from the heated end of the thermopile to the gas valve.
Review Questions 4.Thermopiles receive electrical power from a transformer? No – pilot heat on the end of the thermopile generates electricity – millivolts. A maximum of 750 MV Vs a thermocouple which normally has a maximum output of 30MV.
Review Questions 5. Millivolts are AC or DC? Direct Current
Review Questions 6. When I see the pilot light through the sight glass, I can release the pilot knob? No, you must wait for the LED to flash indicating the milli-voltage from the thermopile circuit has reached an adequate level to power the gas valve/thermostat control functions.
Service - Combustion Chamber
Service - Burner Assembly
Service - Supply Gas Pressure Test Burner Off – Static Pressure 9.85 In W.C. Burner On – Dynamic Pressure 8.90 In W.C. (Natural Gas)
Service – Manifold Gas Pressure See Gas Valve Label Or Model and Rating Plate For Proper Reading Pressure Test Fittings
Service - LED Diagnostic Codes If you have to reset the thermal switch (TCO), always check for flammable vapors or clean the filter and flame trap before relighting.
Service – Connections Check Igniter Wire From Thermopile (White) From Thermal Switch (Red) Manifold Press. Tap Igniter Button
Service - Wrap Around Air Filter Wrap Around Air Filter Must Be Kept Clean
Service - Thermopile Powered A grouping of thermocouples into one housing results in a Thermopile or Generator Heat on the thermopile, generates 750 to 850 milli- volts (.750VDC) – open circuit. When heated and connected to gas valve, ours generates 350 or more mV - closed circuit.
Disconnecting Thermopile Disconnect wires from gas valve/thermostat
Service - Thermopile Check – Open Circuit Knob held in to sustain gas to pilot Multimeter testing of thermopile leads Generating.797VDC or 797 millivolt From thermopile From thermal switch
Service - Thermopile Check – Closed Circuit Generating.353VDC or millivolt Thermopile circuit leads are connected to gas valve Pilot is lit Multi-meter leads inserted into thermopile circuit connections
Service - Thermopile Check – Closed Circuit.658VDC or 658 mV- well in excess of the minimum 350mV Multi-meter test lead to thermostat connection (white) and 2 nd lead to thermal switch. Pilot is lit 2 nd closed circuit test method Red – from thermal switch
Review Questions 9. I can not relight the pilot! Most likely reasons? Thermopile still hot – wait for LED to go out, open thermal switch (TCO), plugged filter, plugged flame-trap.
Review Questions 10. My multimeter says that the thermopile is generating nearly 30 milli-volts DC. Why wont my pilot light. 30mv is a thermocouple reading value. Check multimeter setting, poor flame impingement on thermopile, faulty thermopile.
Review Questions 11. My shower time has decreased significantly. Why? A 40 gallon model set at 140°F was removed and a 40 gallon model set at 120° was installed.
Atmospheric Vented, Residential Gas – Honeywell Valve - Thermopile Powered Series 300/301
for product specs and installation manuals.www.hotwater.com