2 18-CD35D1-1
INSTALLER’S GUIDE
INSTALLATION INSTRUCTIONS
SAFETY SECTION
The following safety practices and precautions must be followed
during the installation, servicing, and operation of this furnace.
1. Use only with the type of gas approved for this furnace.
Refer to the furnace rating plate.
2. Install this furnace only in a location and position
as specified in “Location and Clearances” of these
instructions.
3. Provide adequate combustion and ventilation air to the
furnace space as specified in “Air for Combustion and
Ventilation” of these instructions.
4. Combustion products must be discharged outdoors.
Connect this furnace to an approved vent system only, as
specified in the “Venting” section of these instructions.
5. Never test for gas leaks with an open flame. Use a
commercially available soap solution made specifically
for the detection of leaks to check all connections, as
specified in “Gas Piping” of these instructions.
6. Always install the furnace to operate within the
furnace’s intended temperature-rise range with a duct
system which has an external static pressure within the
allowable range, as specified on the unit rating plate.
Airflow with temperature rise for CFM versus static is
found in Service Facts document M951-SF-x.
7. When a furnace is installed so that supply ducts carry
air circulated by the furnace to areas outside the space
containing the furnace, the return air shall also be
handled by a duct(s) sealed to the furnace casing and
terminating outside the space containing the furnace.
8. A gas-fired furnace for installation in a residential
garage must be installed as specified in “Location and
Clearances” section, of these instructions.
9. The furnace may be used for temporary heating of
buildings or structures under construction only when
the following conditions have been met:
The furnace venting system must be complete and
installed per manufacturer’s instructions.
The furnace is controlled only by a room thermostat
(no field jumpers).
The furnace return air duct must be complete and
sealed to the furnace and clean air filters are in
place.
The furnace input rate and temperature rise must be
verified to be within nameplate marking.
100% of the furnace combustion air requirement
must come from outside the structure.
The furnace return air temperature range is between
55 and 80 degrees Fahrenheit.
Clean the furnace, duct work, and components upon
substantial completion of the construction process,
and verify furnace operating conditions including
ignition, input rate, temperature rise and venting,
according to the manufacturer’s instructions.
10. This product must be gas piped by a Licensed Plumber
or Gas Fitter in the Commonwealth of Massachusetts.
▲
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:
Seal any unused openings in the venting
system.
1. 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 CAN/CGA B149
Installation Codes and these instructions. Determine
that there is no blockage or restriction, leakage,
corrosion and other deficiencies which could cause
an unsafe condition.
2. 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.
3. Close fireplace dampers.
4. 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.
5. Follow the lighting instructions. Place the appliance
be-ing inspected into operation. Adjust the thermostat
so appliance is operating continuously.
6. 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 CAN/CGA B149
Installation Codes.
7. After it has been determined that each appliance
connected to the venting system properly vents where
tested as outlined above, return doors, windows,
exhaust fans, fireplace dampers and any other gas-
fired burning appliance to their previous conditions of
use.
