8
e.
Test for draft hood equipped appliance spillage at the
draft hood relief opening after 5 minutes of main burner
operation. Use the flame of a match or candle;
f.
After it has been determined that each appliance
connected to the venting system properly vents when
tested as outlined above, return doors, windows, exhaust
fans, fireplace dampers and any other gas burning
appliance to their previous conditions 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 CAN/CSA B149
Installation Codes.
If resizing is required on any portion of the venting system, use the
appropriate table in the latest edition of the National Fuel Gas
Code ANSI Z223.1 and/or CAN/CSA B149 Installation Codes.
T
HERMOSTAT
L
OCATION
In an area having good air circulation, locate the thermostat about
five feet high on a vibration-free inside wall. 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 mount-
ing instructions and further precautions.
C
OMBUSTION
AND
V
ENTILATION
A
IR
R
EQUIREMENTS
T
O
AVOID
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
,
SUFFICIENT
FRESH
AIR
FOR
PROPER
COMBUSTION
AND
VENTILATION
OF
FLUE
GASES
MUST
BE
SUPPLIED
. M
OST
HOMES
REQUIRE
OUTSIDE
AIR
BE
SUPPLIED
INTO
THE
FURNACE
AREA
.
WARNING
Improved construction and additional insulation in buildings have
reduced heat loss by reducing air infiltration and escape around
doors and windows. These changes have helped in reducing heat-
ing/cooling costs but have created a problem supplying combus-
tion and ventilation air for gas fired and other fuel burning appli-
ances. Appliances that pull air out of the house (clothes dryers,
exhaust fans, fireplaces, etc.) increase the problem by starving
appliances for air.
House depressurization can cause back drafting or improper com-
bustion of gas-fired appliances, thereby exposing building occu-
pants to gas combustion products that could include carbon mon-
oxide.
so that the ignition source and burners are located not less than
eighteen inches (18") above the floor and is protected or located to
prevent physical damage by vehicles. A gas furnace must not be
installed directly on carpeting, tile, or other combustible materi-
als other than wood flooring.
F
URNACE
S
USPENSION
If suspending the furnace from rafters or joist, use 3/8" threaded
rod and 2”x2”x3/8” angle iron as shown below. The length of rod
will depend on the application and the clearances necessary.
Suspended Furnace
E
XISTING
F
URNACE
R
EMOVAL
NOTE:
When an existing furnace is removed from a venting system
serving other appliances,
the venting system may be too large to
properly vent the remaining attached appliances.
The following vent testing procedure is reproduced from the
Ameri-
can National Standard/National Standard of Canada for Gas-Fired
Central Furnaces ANSI Z21.47-Latest Edition, CSA-2.3-Latest Edi-
tion Section 1.23.1.
The following steps shall be followed with
each appliance connected to the venting system placed in opera-
tion, while any other appliances connected to the venting system
are not in operation:
a.
Seal any unused openings in the venting system;
b.
Inspect the venting system for proper size and horizontal
pitch, as required by the National Fuel Gas Code, ANSI
Z223.1 or the CAN/CSA B149 Installation Codes and these
instructions. Determine that there is no blockage or
restriction, leakage, corrosion and other deficiencies
which could cause an unsafe condition;
c.
In so far as practical, close all building doors and
windows and all doors between the space in which the
appliance(s) connected to the venting system are located
and other spaces of the building. 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. Close
fireplace dampers;
d.
Follow the lighting instructions. Place the appliance being
inspected in operation. Adjust thermostat so appliance
shall operate continuously;
