What is a redundant gas valve Course Hero?
Most furnaces now use intermittent pilot ignition or direct ignition controls. They will use two automatic shutoffs that are mechanically in series to provide the same level of safety. These valves are called redundant gas valves because they have two valves to shut off the gas flow.
What is a redundant gas valve and how is it checked?
A redundant gas valve has two or three valve operators physically in series but wired in parallel with one another. This built in safety feature allows any operator (pilot or main) to block gas from getting to the main burner.
What is a reductant gas valve?
The Reductant Purge Valve controls the flow of DEF (Diesel Exhaust Fluid) from the pump to the injector.
Why do gas furnace efficiencies jump from 80% to 90 %?
Why do gas furnace efficiencies jump from 80% to 90%? Efficiencies over 80% cause condensation but the flue gas is still too hot for PVC vent pipe until the efficiency reaches 90%.
How does a hot surface ignition system work?
Hot Surface Ignition systems use an ‘M’ or fork-shaped silicon carbide or silicon nitride igniter piece instead of a traditional spark igniter to light your gas flames. Low-voltage, but high-current electricity is sent through the hot surface igniter piece, heating it up to a glowing 2500 degrees Fahrenheit.
How many volts do you need to open a gas valve?
24 volts is given to the gas valve. The flame sensor starts detecting if there is a flame or not.
What is the purpose of the reductant purge valve?
The main role of the reductant purge control valve circuit is to send a signal to the powertrain control module or the engine control module. It would act as a reference point to decide when the reductant pump needs to reverse flow as well as the purge the DEF system.
What is a reductant injector?
The reductant injector is used to reduce emissions gases exiting the exhaust by injecting either air or chemicals depending on the usage and vehicle. When the ECU detects the fault in the reductant injector circuit, it will set the P2047 code and the Check Engine Light will be displayed on the dashboard.
What makes a redundant gas heater valve redundant?
What is the function of an automatic gas valve?
An automatic gas valve has a pressure regulator, pilot safety shutoff and a redundant shutoff feature. What is the function of the servo pressure regulator in a modern combination gas valve? The servo pressure regulator closely monitors the outlet or working pressure of the gas valve.
Which is the best gas valve to replace?
Gas Valves. Designed for use with standing pilot systems, it replaces hundreds of existing models in the field. Designed for use with common electronic ignition systems (HSI/DSI), it replaces hundreds of existing models in the field. The 36H Series is our highest capacity gas valve.
How does a direct burner gas valve work?
In a direct burner gas valve system the electronic module or IFC lights the main burner directly without a pilot flame. A spark, hot surface igniter or a glow coil ussually accomplishes ignition.
