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- Gas fireplace millivolt systems
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Gas fireplace millivolt systems
This page covers the repair of gas fireplaces.
These appliances use flammable and explosive gasses and lethal voltages. If you are not confident in your abilities, do not proceed.
The thermopile system or (pilot generator) is one the first control systems for gas heating appliances.
In these systems, the pilot safety and power source for the gas valve is provided by the heat of the pilot light.
The advantage of this type of control is the unit will operate with no external power. The only effect a power outage will have on these systems is that if there is a fan, it wont operate.
Early millivolt systems were installed on gravity type furnaces that had no fan to replace coal or wood fired burners.
They became rare when higher efficiency furnaces with forced air fans were installed.
They have become popular again with the use gas designed fireplaces for use when there is a power outage.
These heaters can be used with the power on using a powered fan to increase efficiency or with the power off and will operate normally with somewhat less efficiency.
In these systems, the pilot safety and power source for the gas valve is provided by the heat of the pilot light.
The advantage of this type of control is the unit will operate with no external power. The only effect a power outage will have on these systems is that if there is a fan, it wont operate.
Early millivolt systems were installed on gravity type furnaces that had no fan to replace coal or wood fired burners.
They became rare when higher efficiency furnaces with forced air fans were installed.
They have become popular again with the use gas designed fireplaces for use when there is a power outage.
These heaters can be used with the power on using a powered fan to increase efficiency or with the power off and will operate normally with somewhat less efficiency.