GM9S80 Service Manual

SYSTEM OPERATION
16
 The vertical height of the Category I venting system
must be at least as great as the horizontal length of the
venting system.

-


When an existing furnace is removed from a venting sys-
tem serving other appliances, the venting system may be
too large to properly vent the remaining attached applianc-
es. For complete details refer to Exisiting Furnace Removal
section of this manual.
When resizing any portion of the common venting system,

of the National Fuel Gas Code NFPA 54/ANSI Z223.1.
Upow or Horizontal units are shipped with the induced


blower can be rotated 90 degrees for Category I venting.
       
-

Vent the furnace in accordance with the National Fuel Gas
Code NFPA 54/ANSI Z223.1 - latest edition. In Canada,
vent the furnace in accordance with the National Standard
of Canada, CAN/CGA B149.1 and CAN/CGA B149.2 - lat-
est editions and amendments.





           

Refer to Electrical Connections section of this manual for
instructions.




-



-




-
-



Wash
Crown


Clay Tile Size Generally

1/2" to 1" Air Space
Second Floor
First Floor
Attic Floor
Roof Line
Throat
Damper
Breech
Clean Out
Fan Assisted
Forced Air
Furnace
Natural Draft
Water Heater
Water Heater
Vent Connector
Basement Floor
F.A.F. Vent
Connector


This checklist serves as a summary of the items to be
checked before venting an 80% furnace into a masonry
        -
viceman use this checklist to perform a yearly inspection of
the furnace venting system.
This checklist is only a summary. For detailed information
on each of the procedures mentioned, see the paragraph
referenced with each item.
         -

 
report represents the best information on this subject which
is currently available.