Lodge Manufacturing GMD1-80N Manuale Utente

 

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f.  Reinstall and secure the junction box cover with the original mounting screws.  

 
3.  Connection Of Room Thermostat Wires 
 

NOTE: Class 1 thermostat wire must be used inside the furnace burner 
compartment. 
 
a.  Insert 24 VAC wires through the plastic grommet on the left side of the furnace 

casing.  

b.  Connect the thermostat wires to the W/R 50A65-143 control (refer to the wiring 

diagram).  

c.  Connect the thermostat wires to the room thermostat. 

 

IMPORTANT:    The room thermostat should be installed 4 to 5 feet above the floor 
on an interior wall which is relatively free from direct sources of heat (sunlight or 
supply airflow) or exposure to cold (drafts from open windows and doors).  The 
nominal anticipator setting is 0.8 amperes, for the GMD (refer to the thermostat 
literature for additional information). 

 

Five-conductor thermostat wire is recommended for 24 VAC, low-voltage, control 
circuit wiring.  How ever only 2 wires are required for the furnace (a heating 
application only). 
 

Electrical Wire Diameter 

Maximum Recommended 
Thermostat Wire Length 

                  (AWG) 

                    

(Feet) 

 

24 55 
22 90 
20 140 
18 225 

  

Once the furnace is installed, check the thermostat anticipator for proper nominal 
setting. 
 

 

1.  Connect a multimeter, capable of reading milliamps (mA), in series 

with the low voltage wires to the thermostat.  

1.  Increase the thermostat setting, or create a “call for heat”.  
2.  Read the value of the thermostat current, in milliamps.  
3.  Adjust the heat anticipator of the thermostat to the value read by the 

multimeter. 

 

If the heat anticipator is set too high, the furnace may delay activation of a heating 
cycle for too long.  If the heat anticipator is set too low, the furnace may cycle too 
frequently.  Either condition may not provide optimal comfort to the homeowner.