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3.0 OPERATION 
 

The Model 5474/5474A/5474L Integrated Heating System is designed to 
operate with a temperature controller such as the ETS Models 5100 or 
5200 series. The Heater power cord plugs into the control outlet labeled 
“INCREASE”. The Fan power cord plugs into an external outlet. 
 

NOTE 

The Model 5474/5474A/5474L Heater requires constant air circulation 
for proper operation. If the fan is turned off and the heater is run at 
full power it may result in damage to the system. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

7/05/06 

 
 

 
 
 
 
 
 
 
 

 

 

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