11
CIRCULATING AIR SUPPLY
General
Plenums and air ducts must be installed in
accordance with the Standard for the Installation
of Air Conditioning and Ventilating Systems
(NFPA No. 90A) or the Standard for the Installation
of Warm Air Heating and Air Conditioning
Systems (NFPA No. 90B).
It is recommended that the outlet duct be provided
with a removable access panel. This opening
should be accessible when the furnace is
installed in service and shall be of a size that
smoke or reflected light may be observed inside
the casing to indicate the presence of leaks in
the heat exchanger. The cover for the opening
shall be attached in such a manner as to prevent
leaks.
!
WARNING:
CARBON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for each appliance connected to
the venting system being placed into operation could result in carbon
monoxide poisoning or death.
The following steps shall be followed for each appliance connected to the
venting system being placed into operation, while all 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 horizontal pitch, as
required in the
National Fuel Gas Code, ANSI Z223. 1/NFPA 54 or
the CSA B149.1, Natural Gas and Propane Installation Codes and
these 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 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.
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 are operating at maximum speed.
Do not operate a summer exhaust fan.
6.
Follow the lighting instructions. Place the appliance being inspected
into operation. Adjust the thermostat so appliance is operating
continuously.
7.
Test for spillage from draft hood equipped appliances at the draft
hood relief opening after 5 minutes of main burner operation. Use
the flame of a match or candle.
8.
If improper venting is observed during any of the above tests, the
venting system must be corrected in accordance with the
National
Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or CSA B149.1, Natural
Gas and Propane Installation Codes.
9.
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-fired burning appliance to their previous conditions of
use.
