2017 Heat Wagon 4220

• Safe fuel shutdown if combustion air is interrupted

• May be ducted up to 400 feet

• Safe monitoring of combustion, two trial electronic ignition with 20 second pre-purge time delay and 7 second shutdown

• Direct wire with easy, safe 100% power shut off

• Protects heater by shutting down if unit is being overfired (high limit)

• Protects heater by shutting down if voltage is too low

• Easy monitoring of control voltage to ensure trouble-free operation

• Automatically cycles the heater hi/low

• Indoor/outdoor usage