IO-231
6/03
12
below 55
o
F during heating operation. This will minimize the
possibility of condensate forming inside the heat exchanger.
When this type of system is utilized the volume of air must
not be reduced.
Plenum chambers and air ducts must be installed in
accordance with the Standard for the Installation of Air
Conditioning and Ventilating Systems, NFPA #90A, or the
Standard for the Installation of Warm Air Heating and Air
Conditioning Systems, NFPA
# 90B.
If installed in parallel with a cooling unit the damper or other
means used to control the flow of air must be adequate to
prevent chilled air from entering the furnace, and if manually
operated must be equipped with means to prevent
operation of the other unit unless the damper is in the full
heat or cool position.
NOTE:
UPON INITIAL START-UP SOME SMOKE OR AN
ODOR MAY BE PRESENT. THIS IS NORMAL AND
SHOULD DISAPPEAR IN A SHORT AMOUNT OF TIME.
IT IS
RECOMMENDED THAT WINDOWS AND DOORS
BE OPENED UPON INITIAL START-UP TO VENT THIS
NON-TOXIC
SMOKE.
One of the most common causes of problems, including
premature heat exchanger failure, in a forced air heating
system is insufficient return air. The return air connections
to the furnace should be approximately equal to the area
of warm air discharge. Consult local codes for specific
requirements.
All return ducts must be adequately secured to the furnace
and sealed airtight. All other ductwork must be secured
with approved connections and sealed airtight.
When the furnace is mounted on a platform it must be
sealed air tight between the furnace and the return
ductwork. The floor or platform must provide sound physical
support for the furnace without cracks, gaps, sagging, etc.
around the base as to provide an airtight seal between the
support and the base.
Install the return air to terminate through the base under
the furnace. For installations where return air ducts cannot
be run under the floor, the return air supply may be taken
from the side(s).
Embosses are provided on the sides of the furnace for use
as a template for the ductwork connection.
Where the maximum required airflow is
1800 c.f.m.
or
greater, the bottom or both sides must be utilized for return
air supply. Never use the rear of the furnace for the return
connection.
ELECTRICAL SUPPLY CONNECTIONS
The electrical requirements are 115Volts, 60 Hz., 1 Ph. A
separate supply line with a current overload device and a
manual switch, where required, must be installed. Type “T”
wire or equivalent with a minimum rating of 95
o
F (35
o
C)
temperature rise must be run directly from the main power
supply. Use copper conductors only.
Holes are provided on both sides of the furnace for electrical
connection. The junction box may be moved to either side.
The entry holes for supply and low voltage control wires are
for use with ½” electrical connectors.
All electrical wiring entering the furnace must be secured to
the casing with proper methods of strain relief. Solderless
connectors may be used to connect wires inside the junction
box for supply wires.
It is recommended that a means of shutting off the power
be within sight of the furnace.
CONTROL VOLTAGE CONNECTIONS
Thermostat Installation
Install the thermostat in accordance with the instructions
accompanying the thermostat. Connect the thermostat
wiring to the thermostat terminal block on the furnace
control board. The thermostat wiring should be a minimum
of 18 gauge. Adhere to recommended color code to
facilitate future troubleshooting.
The thermostat should be located near the return air grille
or opening. It should be approximately 5 feet from the floor
level. Never locate the thermostat where it will be influenced
by heat generated by hot water pipes, lamps, televisions,
direct sunlight, supply air registers, etc.
Interconnecting wiring must be secured and protected from
damage or disconnection. The use of solderless connectors
or equivalent is recommended.
Setting The Heat Anticipator
Following the instructions accompanying the thermostat for
proper adjustment of the anticipator.
FEATURES
The integrated control board in this furnace has terminals
provided for added features. These features are a 115v.
Humidifier, an Electronic Air Cleaner, Blower “OFF” Timing
and a 24v. Dehumidifier.
115 Volt Humidifier
The “115v HUM” terminal is located on the high voltage side
of the board. This terminal is energized whenever the power
vent blower is energized.
Installation of the electrical supply must be in accordance
with local codes. In the absence of local codes refer to
the National Electrical Code ANSI/NFPA No. 7 (latest edi-
tion), which can be obtained from the National Fire Pro-
tection Association, Batterymarch Park, Quincy, MA 02269.
In Canada refer to the latest edition of the Canadian Elec-
trical Code C22.1 Part I.