18-CD37D1-2-EN
15
Installer’s Guide
DO NOT Install return air through the side of furnace
cabinet on horizontal applications.
NOTE: Minimum return air temperature is 55° F.
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 Code 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 deficiencies which could cause an
unsafe condition.
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
Z221.1/NFPA 54 and/or CSA B149.1 Natural Gas and
Propane Installation Code.
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.
▲
WARNING
!
GENERAL VENTING
FURNACE EXHAUST MUST BE VENTED TO THE OUTDOORS.
THESE FURNACES ARE INDUCED DRAFT VENTED AND
MUST
NOT
BE CONNECTED TO ANY VENT SERVING
ANOTHER APPLIANCE. PLEASE NOTE THAT THESE
FURNACES USE
POSITIVE-PRESSURE
VENT SYSTEMS.
Proper venting is essential to obtain maximum efficiency from
a condensing Furnace. Proper installation of the vent system is
necessary to assure drainage of the condensate and prevent
deterioration of the vent system.
American Gas Association has certified the design of condensing
Furnaces for a minimum of 0" clearance from combustible
materials with a single wall plastic vent pipe.
The recommended system is assembled from 2", 2-1/2", or 3"
plastic pipe and fittings (See Table 9, page 18). Where the system
is routed to the outdoors through an existing masonry chimney
containing flue products from another gas appliance, or where
required by local codes, then 3" venting of Type 29-4C stainless
steel must be used in place of PVC material.
These Furnaces have been classified as CATEGORY IV
Furnaces in accordance with ANSI Z21.47 “latest edition”
standards. Category IV Furnaces operate with positive vent
pressure and with a vent gas temperature less than 140°F above
the dewpoint. These conditions require special venting systems,
which must be gas tight and water tight.
NOTE: When an existing Furnace is removed from a venting
system serving other gas appliances, the venting system is
likely to be too large to properly vent the remaining attached
appliances.
IMPORTANT:
These Furnaces may be installed as Direct Vent
(sealed combustion) or as Nondirect Vent (single pipe). The
Furnaces are shipped
DIRECT VENT
with sealed combustion.
CARBON MONOXIDE POISONING HAZARD
FURNACE MUST BE VENTED PROPERLY. FAILURE TO
FOLLOW THE INSTALLATION INSTRUCTIONS FOR THE
VENTING SYSTEM COULD RESULT IN CARBON MONOX-
IDE POISONING, FIRE OR SMOKE THAT CAN CAUSE SE-
RIOUS BODILY INJURY, DEATH OR PROPERTY DAMAGE.
▲
WARNING
!
Table 8
LOCATING FILTER RETAINER BRACKETS IN DUCTWORK
CABINET
WIDTH
RETURN
DUCT
WIDTH
DIMENSION
"A"
DIMENSION
"B"
FILTER
BRACKET
LOCATION*
17-1/2"
16-1/4"
15"
14"
14-3/8"
21"
19-3/4"
19-1/2"
14"
13-1/8"
24-1/2"
23-1/4"
22"
14"
13-5/8"
* LOCATION DIMENSION IS FROM END OF DUCT AGAINST THE FURNACE TO THE
SCREW HOLES FOR THE BRACKET.
Important: Products installed in Canada must use vent
systems that are certified to the Standard for Type BH
Gas Venting Systems (ULC S636) for Class II-A venting
systems (up to 65°C). Components of the vent system
must not be interchanged with other vent systems or
unlisted pipe or fittings. Plastic components, specified
primers, and glues must be from a single system
manufacturer and not intermixed with other system
manufacturer's vent system parts. In addition, the first
three feet of the vent pipe must be visible for inspection.
CARBON MONOXIDE POISONING HAZARD
FAILURE TO FOLLOW THE DURAVENT INSTALLATION
INSTRUCTIONS IF THE POLYPROPELENE VENTING
SYSTEM IS BEING PLACED INTO OPERATION COULD
RESULT IN CARBON MONOXIDE POISONING OR DEATH.
▲
WARNING
!
