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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 CSA B149.1, Natural Gas and
Propane Installation Code and these instructions. Deter-
mine that there is no blockage or restriction, leakage, cor-
rosion 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. (Figure 9)
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
Code.
9.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!fired burning
appliance to their previous conditions of use.
6. Horizontal Venting
Category I Furnaces With External Power
Venters
In order to maintain a Category I classification of fan!assisted
furnaces when vented horizontally with sidewall termination, a
power venter is REQUIRED to maintain a negative pressure in the
venting system.
In the U.S.: Per the NFGC, a listed power venter may be used,
when approved by the authority having jurisdiction.
In Canada: Only power venters approved by the power venter
manufacturer and where allowed by the authority having
jurisdiction may be used.
Please consult the Fields Controls Co. or Tjernlund Products, Inc.
for power venters certified for use with our furnaces.
441 01 2613 05
Venting to Existing Masonry Chimney
Dedicated venting of one fan assisted furnace into any
masonry chimney is restricted. A chimney must first be lined
with
either
ANSIZ223.1/NFPA!2009 tables 13.1a or 13.1b or a listed metal
lining system. (See Masonry Chimney Venting of these
instructions.)
Listed, corrugated metallic chimney liner systems in masonry
chimneys shall be sized by using ANSIZ223.1/NFPA!2009
section 13.1.7 for dedicated venting and 13.2.20 for common
venting with the maximum capacity reduced by 20% (0.80 X
maximum capacity) and the minimum capacity as shown in the
applicable table. In Canada, use the CSA B149.1!05 Natural Gas
and Propane Installation Code, appendix C, Section 10.
Corrugated metal vent systems installed with bends or offsets
require additional reduction of 5% of the vent capacity for each
bend up to 45° and 10% of the vent capacity for each bend from 45°
up to 90°.
NOTE: Two (2) 45° elbows are equivalent to one (1) 90° elbow.
Combined Venting into a Masonry Chimney
Venting into a masonry or concrete chimney is only permitted
as outlined in the NFGC or NSCNGPIC venting tables. Follow
all safe venting requirements.
Note: See section "Masonry Chimney Venting".
Vent Termination
Venting Through a Non-Combustible and
Combustible Wall
Consult External Power Venter manufacturer instructions.
Select the power venter to match the Btuh input of the furnace
being vented. Follow all of the Power Venter manufacturer's
installation requirements included with the power venter for:
•
venting installation,
•
vent terminal location,
•
preventing blockage by snow,
•
protecting building materials from degradation by flue gases,
•
ee Figure 10 for required vent termination.
s
NOTE: It is the responsibility of the installer to properly terminate
the vent and provide adequate shielding. This is essential in order
to avoid water/ice damage to building, shrubs and walkways.
Specifications are subject to change without notice
Subject to change without notice.
National Excelsior Company
www.excelsiorhvac.com
Type
B
vent
sized
in
accordance
with
13
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