4
441 01 2101 05
Specifications are subject to change without notice.
INTRODUCTION
F8MTL & G8MTL 4
−
way multipoise Category I fan
−
assisted
furnace is CSA (formerly A.G.A. and C.G.A.) design
−
certified.
A Category I fan
−
assisted furnace is an appliance equipped
with an integral mechanical means to either draw or force
products of combustion through the combustion chamber
and/or heat exchanger. The furnace is factory
−
shipped for
use with natural gas. This furnace is not approved for
installation in mobile homes, recreational vehicles, or
outdoors.
These furnaces shall not be installed directly on carpeting,
tile, or any other combustible material other than wood
flooring. For downflow installations, a factory accessory floor
base must be used when installed on combustible materials
and wood flooring. This special base is not required when this
furnace is installed on the manufacturer’s coil model numbers
END4X, ENW4X, or when the manufacturer’s coil casing
model number NAEA is used. See Figure 2 for clearance to
combustible material information.
This furnace is designed for minimum continuous return
−
air
temperature of 60
F (16
C) db or intermittent operation down
to 55
F (13
C) db such as when used with a night setback
thermostat. Return
−
air temperature must not exceed 80
F
(27
C) db. Failure to follow these return
−
air temperature limits
may affect reliability of heat exchangers, motors, and
controls. (SeeFigure 3)
For accessory installation details, refer to the applicable
instruction literature.
NOTE
: Remove all shipping brackets and materials before
operating the furnace.
Figure 2
−
Clearances to Combustibles
CODES AND STANDARDS
Follow all national and local codes and standards in
addition to these instructions.
The installation must comply
with regulations of the serving gas supplier, local building,
heating, plumbing, and other codes. In absence of local
codes, the installation must comply with the national codes
listed below and all authorities having jurisdiction.
In the United States, follow all codes and standards for the
following:
Step 1 — Safety
National Fuel Gas Code (NFGC) NFPA 54
−
2012/ANSI
Z223.1
−
2012 and the Installation Standards, Warm Air
Heating and Air Conditioning Systems ANSI/NFPA 90B
Step 2 — General Installation
Current edition of the NFGC and the NFPA 90B. For copies,
contact the National Fire Protection Association Inc.,
Batterymarch Park, Quincy, MA 02269; (www.NFPA.org) or
for only the NFGC, contact the American Gas Association,
400 N. Capitol Street, N.W., Washington DC 20001
(www.AGA.org)
Figure 3
−
Return Air Temperature
A06745
80
F/27
C
60
F/16
C
