Crankcase Heater Wiring. Verify correct crankcase heater needed through On-Line Product Information. Tecumseh AHE Manual Online. It is important to note that if you size the crankcase heater improperly the heater may be too hot for the oil inside the crankcase. Buy Electric Heaters Now.
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One big reason is that the circuit for the crankcase heater is permanently on. When contactor is deenergized crankcase heater is on. This means if you replace this contactor wire for wire with a 2 pole contactor the crankcase heater will never work. For instance if a module is usually powered up and it sends out the signal of 50 percent the voltage plus the technician will not know this hed think he offers a challenge as he or she would expect the 12V signal. The two wires of the heater is wired directly to the 230 Volt input side of the contactor from the main power supply and is always supplying 230 volts of power to the heater. The two wires of the heater are wired directly to the input side of the contact from the main power supply and power is always supplied to the heater.
Crankcase heater wire with the remaining Purple Thermostat Terminator wire using the supplied wire nut.
Free Delivery On Orders Over 25. This will prevent oil dilution and bearing stress on initial start up. 7152020 So the crankcase heater ONLY functions when the compressor contactor is OPEN and even then it does so by back feeding through the compressor common and back through the run winding of the compressor to the constant powered L2 side of the contactor. So when the compressor runs the discharge line gets hot causing the thermostat to open shutting down the crankcase heater. The end seals supplied will be per the customer specification in the application and include the proper lead wire type insulation length and terminated as needed or provided with stripped ends for installation. The crankcase heater must remain energised during compressor off cycles.
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The crankcase heater must remain energised during compressor off cycles.
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General Information Start Capacitor MfdVolt.
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See Figure 1 11.
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If a crankcase heater is fitted it is recommended that the heater be turned on for a minimum of 12 hours prior to starting the compressor.
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The two wires of the heater are wired directly to the input side of the contact from the main power supply and power is always supplied to the heater.
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Use wire ties to secure the crankcase heater wires to the compres-sor lead wires.
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When wiring in a crankcase heater utilizing auxillary contacts ensure that the heater is powered on the compressor off.
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If a crankcase heater is fitted it is recommended that the heater be turned on for a minimum of 12 hours prior to starting the compressor.
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Care must be taken to ensure the leads do not come in contact with the compressor discharge line with any moving parts or any sharp.
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Tecumseh AHE Manual Online.
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Crankcase heater is wired across the open contacts of the contactor.
