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After a delay, the blower will start on low speed.
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After a second delay, the first 5KW element will energize.
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After a third delay, the second 5KW element will energize.
When the demand is satisfied:
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The sequence above is reversed until all elements and the blower are OFF.
Low speed switch at ON and power switch at 10KW:
When the thermostat is not calling for heat:
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The elements are not energized and the blower is on low speed.
When the thermostat is calling for heat:
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After a first delay, the first 5KW element will energize.
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After a second delay, the second 5KW element will energize.
When the demand is satisfied:
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The sequence above is reversed until all elements are OFF. The blower keeps running on low speed.
Low speed switch at AUTO and power switch at 15KW ( center position):
When the thermostat is not calling for heat:
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The elements are not energized and the blower is OFF.
When the thermostat is calling for heat:
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After a delay, the blower will start at the low speed.
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After a second delay, the first 5KW element will energize.
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After a third delay, the second 5KW element will energize.
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After a fourth delay, the third 5KW element will energize AND the blower will switch to medium speed.
When the demand is satisfied:
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The sequence above is reversed until all elements and the blower are OFF.
Low speed switch at ON and power switch at 15KW:
When the thermostat is not calling for heat:
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The elements are not energized and the blower is on low speed.
When the thermostat is calling for heat:
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After a first delay, the first 5KW element will energize.
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After a second delay, the second 5KW element will energize.
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After a third delay, the third 5KW element will energize AND the blower will switch on medium speed.
When the demand is satisfied:
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The sequence above is reversed until all elements are OFF. The blower keeps running on low speed.
Cooling mode (model 215 as example):
Low speed switch at AUTO
When the cooling thermostat is not calling for cooling:
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The elements are not energized and the blower is OFF.
When the cooling thermostat is in demand (circuit is closed between Rc and G):
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The blower will start on the highest speed.
When the cooling demand is satisfied:
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The blower will stop.
Low speed switch at ON
When the cooling thermostat is not calling for cooling:
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The elements are not energized and the blower is on low speed.
When the cooling thermostat is in demand:
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