Table of Contents
Advertisement
Line contact to framing is permitted when installed in the
horizontal configuration. Line contact is defined as the
portion of the cabinet that is formed by the intersection of
the top and side. ACCESSIBILITY CLEARANCE, WHERE
GREATER, SHOULD TAKE PRECEDENCE OVER MINIMUM
FIRE PROTECTION CLEARANCE. A gas-fired furnace for
installation in a residential garage must be installed 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
materials other than wood flooring.
Furnace Suspension
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
Existing Furnace Removal
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 repro duced from
the American National Standard/National Standard of
Canada for Gas-Fired Central Furnaces ANSI Z21.47-
Latest Edition, 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:
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 and these instructions. Determine
that there is no blockage or restriction, leakage,
corrosion and other deficiencies which could cause
an unsafe condition;
Figure 5
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;
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.
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.
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.
9
Advertisement
Table of Contents
Troubleshooting
