Lodge Manufacturing GMD1-80N Manual Do Utilizador

 

 10

 
A.  ROOF JACK 
 
The roof jack assembly and accessories must be listed by a nationally recognized 
testing agency for the appropriate heating fuel. 
 
The roof jack assembly must be installed according to the vent manufacturer’s 
instructions prior to the furnace installation.  (Refer to Figure 2 for flue location on 
furnace.)  Adapters for pitched roofs as well as extended barrel length roof jacks are 
available from other suppliers.  
 
All vent seams and connections must be sealed with high temperature silicone caulk.  
 
B.  STANDARD CHIMNEY 
 
When installed as a central furnace special type for single story dwelling, venting into a 
metal vent system approved by a nationally recognized testing agency for the 
appropriate heating fuel type is permitted.  Lined masonry chimneys are acceptable 
when sized appropriately.  The minimum chimney size should equivalent to the inside 
free area of the 4-inch diameter vent collar exiting the furnace, or 12.5 square inches. 
 
Maximum chimney sizes and acceptable installation practices are referenced in the 
following publication.  When installing the GMD1-80N, refer to Appendix G of the latest 
edition of the installation standard NFPA 54, National Fuel Gas Code. 

 

1.  For best performance, locate the furnace so that it is centralized with respect to the 

duct system.  

 
2.  This furnace is only intended for installation with free air return through the furnace 

door louvers.  

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?CAUTION:  DO NOT connect a ducted return air system directly to 

the furnace.  Improper installation may create a fire hazard and damage internal 
equipment, as well as void all manufacturers’ warranties. 

 

3.  This furnace may be installed on combustible flooring when utilizing either the No. 70 

counterflow floor base, for below the floor duct systems, or with the cottage base, for 
floor level air distribution.  See Figures 1A and 1B for depictions of the No. 70 and 
the cottage bases.  

 

4.  This furnace is listed for closet, alcove, or freestanding applications.  All applications 

must comply with the requirements of this manual.