GMES96-U Installation Manual

7
Installations must adhere to the clearances to combustible
materials to which this furnace has been design certified.
The minimum clearance information for this furnace is pro-
vided on the unit’s clearance label. These clearances must
be permanently maintained. Clearances must also accom-
modate an installation’s gas, electrical, and drain trap and
drain line connections. If the alternate combustion air in-
take or vent/flue connections are used additional clearance
must be provided to accommodate these connections. Refer
to Vent/Flue Pipe and Combustion Air Pipe for details.
NOTE: In addition to the required clearances to combustible
materials, a minimum of 24" service clearance must be avail-
able in front of the unit.
A furnace installed in a confined space (i.e., a closet or utility
room) must have two ventilation openings with a total minimum
free area of 0.25 square inches per 1,000 BTU/hr of furnace
input rating. Refer to Specification Sheet applicable to your model
for minimum clearances to combustible surfaces. One of the
ventilation openings must be within 12" of the top; the other
opening must be within 12" of the bottom of the confined space.
In a typical construction, the clearance between the door and
door frame is usually adequate to satisfy this ventilation re-
quirement.
TOP
BOTTOM
TOP
BOTTOM
Figure 1
EXISTING FURNACE REMOVAL
The following vent testing procedure is reproduced from the
American National Standard/National Standard of Canada for
Gas-Fired Central Furnaces ANSI Z21.47, CSA-2.3 latest edition
Section 1.23.1.
The following steps shall be followed with each appliance
connected to the venting system placed in operation, while
any other appliances connected to the venting system are
not in operation:
1. Seal any unused openings in the venting system.
2. Inspect the venting system for proper size and hori-
zontal pitch, as required by the National Fuel Gas Code,
ANSI Z223.1 instructions. Determine that there is no
blockage or restriction, leakage, corrosion and other
deficiencies which could cause an unsafe condition.
3. As far as practical, close all building doors and win-
dows and all doors between the space in which the
appliance(s) connected to the venting system are lo-
cated and other spaces of the building.
4. Close fireplace dampers.
5. Turn on clothes dryers and any appliance not connected
to the venting system. Turn on any exhaust fans, such
as range hoods and bathroom exhausts, so they shall
operate at maximum speed. Do not operate a summer
exhaust fan.
6. Follow the lighting instructions. Place the appliance
being inspected in operation. Adjust thermostat so ap-
pliance shall operate continuously.
7. If improper venting is observed during any of the above
tests, the venting system must be corrected in accor-
dance with the National Fuel Gas Code ANSI Z223.1/
NFPA 54.
8. After it has been determined that each appliance con-
nected to the venting system properly vents when tested
as outlined above, return doors, windows, exhaust
fans, fireplace dampers and any other gas burning ap-
pliance to their previous conditions of use.
If resizing is required on any portion of the venting system, use
the appropriate table in Appendix G in the latest edition of the
National Fuel Gas Code ANSI Z223.1 Installation Codes.
THERMOSTAT LOCATION
The thermostat should be placed approximately five feet from
the floor on a vibration-free, inside wall in an area having good
air circulation. Do not install the thermostat where it may be
influenced by any of the following:
• Drafts, or dead spots behind doors, in corners, or under
cabinets.
• Hot or cold air from registers.
• Radiant heat from the sun.
• Light fixtures or other appliances.
• Radiant heat from a fireplace.
• Concealed hot or cold water pipes, or chimneys.
• Unconditioned areas behind the thermostat, such as
an outside wall.
Consult the instructions packaged with the thermostat for
mounting instructions and further precautions.