18-CD22D1-5
3
Installer’s Guide
INSTALLATION INSTRUCTIONS
General Installation Instructions
3
Location and Clearances
3
Outline Drawings
4-5
Upflow Installation
6
Downflow Installation
6
Horizontal Installation
6
Air For Combustion and Ventilation
7-8
Duct Connections
8
Return Air Filters
9-12
General Venting Instructions
13
Venting Material
13
Venting Tables
14-17
Horizontal Venting
18
Venting Through The Wall
18
Venting Throught The Roof
20
Downward Venting
20
Venting Through a Masonry Chimney
20
Condensate Drain Instructions
22
Electrical Connections
23
Field Wiring Diagrams
24-25
Gas Piping
26
Combustion Input Checks
27
Start Up and Adjustment
29
Preliminary Inspections
29
Lighting Instructions
29
Sequence Of Operation
30
Control And Safety Switch Adjustments
30
Airflow Adjustment
30
Abnormal Conditions
31
IFC Error Flash Code
32
GENERAL INSTALLATION INSTRUCTIONS
The manufacturer assumes no responsibility for equipment
installed in violation of any code or regulation.
It is recommended that Manual J of the Air Conditioning
Contractors Association (ACCA) or A.R.I. 230 be followed in
estimating heating requirements. When estimating heating
requirements for installation at altitudes above 2000 ft., remem-
ber the gas input may need to be reduced (See High Altitude
Installation).
Material in this shipment has been inspected at the factory
and released to the transportation agency without known
damage. Inspect exterior of carton for evidence of rough
handling in shipment. Unpack carefully after moving equip-
ment to approximate location. If damage to contents is
found, report the damage immediately to the delivering
agency.
Codes and local utility requirements governing the installation
of gas fired equipment, wiring, plumbing, and flue connections
must be adhered to. In the absence of local codes, the installa-
tion must conform with latest edition of the National Fuel Gas
Code ANSI Z223.1 • National Installation Code, CAN/CGA
B149.1. The latest code may be obtained from the American
Gas Association Laboratories, 8501 E. Pleasant Valley Rd.,
Cleveland, Ohio 44131.
These furnaces have been classified as CATEGORY IV
furnaces in accordance with latest edition of ANSI Z21.47 •
CAN/CGA 2.3 standards.
Category IV furnaces operate with positive vent static pressure
and with a flue loss less than 17 percent. These conditions
require special venting systems, which must be gas tight and
water tight. These Category IV Direct Vent furnaces are ap-
proved for installation in Manufactured/Mobile housing when
used with BAYMFGH100A.
▲
CAUTION
!
To prevent shortening its service life, the furnace should not
be used as a “Construction Heater” during the finishing
phases of construction until the requirements listed in item
9, a-g of the safety section of this publication have been met.
Condensate in the presence of chlorides and fluorides from
paint, varnish, stains, adhesives, cleaning compounds, and
cement create a corrosive condition which may cause rapid
deterioration of the heat exchanger.
▲
CAUTION
!
Do not install the furnace in a corrosive or contaminated
atmosphere.
LOCATION AND CLEARANCES
The location of the furnace is normally selected by the architect,
the builder, or the installer. However, before the furnace is
moved into place, be sure to consider the following require-
ments:
1. Is the location selected as near the vent and as centralized
for heat distribution as practical?
2. Do all clearances between the furnace and enclosure
equal or exceed the minimums shown in the Table 1.
3. Is there sufficient space for servicing the furnace and other
equipment? A minimum of 24 inches front accessibility to
the furnace must be provided. Any access door or panel
must permit removal of the largest component.
4. Are there at least 3 inches of clearance between the furnace
front panel and any closed panel or door provided?
5. Are the vent pipe and combustion air inlet pipe within vent
table lengths? Will the pipes remain unobstructed?
6. Allow sufficient height in supply plenum above or below
the furnace to provide for cooling coil installation if the
cooling coil is not installed at the time of this furnace
installation.
7. A furnace shall be installed so electrical components are
protected from water.
8. If the furnace is installed in a residential garage, it must be
installed so that the burners and the ignition source are
located not less than 18 inches (46 cm) above the floor
and the furnace must be located or protected to avoid
physical damage from vehicles.
IMPORTANT:
The furnace must be installed level. The only allowable
variation would be slightly to the left and/or forward in upflow
installations or slightly toward the front in horizontal installa-
tions. This is necessary for proper condensate drainage.
Contents
