GC9S96 Service Manual
SYSTEM OPERATION
8
e. Test for draft hood equipped spillage at the draft
hood relief opening after 5 minutes of main burner
f. After it has been determined that each appliance
connected to the venting system properly vents
when tested as outlined above, return doors, win-
other gas burning appliance to their previous con-
ditions of use.
g. If improper venting is observed during any of the
above tests, the common venting system must be
corrected.
Corrections must be in accordance with the latest edition of
the National Fuel Gas Code NFPA 54/ANSI Z223.1 and/or
CSA B149 Installation Codes.
If resizing is required on any portion of the venting system,
use the appropriate table in Appendix G in the latest edi-
tion of the National Fuel Gas Code ANSI Z223.1 and/or
CSA B149 Installation Codes.
A high quality single stage thermostat with a “C” terminal is
recommended to control the G*ES9* and A*ES9* furnace.
In an area having good air circulation, locate the thermostat
the following:
• Drafts, or dead spots behind doors, in corners, or under
cabinets.
• Hot or cold air from registers.
• Radiant heat from the sun.
•
•
• Concealed hot or cold water pipes, or chimneys.
• Unconditioned areas behind the thermostat and
dehumidistat, such as an outside wall.
WARNING
-
Improved construction and additional insulation in build-
escape around doors and windows. These changes have
helped in reducing heating/cooling costs but have created
a problem supplying combustion and ventilation air for gas
etc.) increase the problem by starving appliances for air.
When the furnace is installed as a direct vent (2-pipe) furnace,
no special provisions for air for combustion are required.
However, if this furnace is to be installed in the same space
with other gas appliances, such as a water heater, ensure
there is an adequate supply of combustion and ventilation air
for the other appliances. Refer to the latest edition of the Na-
tional Fuel Gas Code NFPA 54/ANSI Z223.1 (Section 9.3), or
CAN/CGA B149 Installation Codes (Sections 7.2, 7.3, or 7.4),
or applicable provisions of the local building codes for deter-
mining the combustion air requirements for the appliances.
Most homes will require outside air be supplied to the fur-
nace area by means of ventilation grilles or ducts connecting
directly to the outdoors or spaces open to the outdoors such
as attics or crawl spaces.
The following infor mation on air for combustion and ventila-
tion is repro duced from the
gases for appliances installed in buildings shall be obtained
by application of one of the methods covered in 9.3.2 through
9.3.6. Where the requirements of 9.3.2 are not met, outdoor
air shall be introduced in accordance with methods covered
in 9.3.3 through 9.3.6.
Exception No. 1: This provision shall not apply to direct vent
appliances.
Appliances of other than natural draft design and
other than Category 1 vented appliances shall be provided
with combustion, ventilation, and dilution air in accordance
with the appliance manufacturer’s instructions.
Appliances shall be located so as not to interfere with
proper circulation of combustion, ventilation, and dilution air.
Where used, a draft hood or a barometric draft regu-
lator shall be installed in the same room or enclosure as the
between the hood or regulator and the combustion air supply.
Makeup air requirements for the operation of exhaust
-
places shall be considered in determining the adequacy of a
space to provide combustion air requirements.
The required volume of indoor
air shall be determined in accordance with the method in
known to be less than 0.40 ACH, the method in 9.3.2.2 shall
be used. The total required volume shall be the sum of the
required volume calculated for all appliances located within
the space. Rooms communicating directly with the space
in which the appliances are installed through openings not
furnished with doors, and through combustion air openings
sized and located in accordance with 9.3.2.3, are considered
a part of the required volume.