Installation guide

aslocationof unusedblowermotorspeedleads.Usethe
chart (Table 7) to determine the blower motor speed settin( s.
Blower Speed Chart
Wire Color
Black
Orange*
Blue
Red
Motor Speed
High
Med-High
Med- Low
Low
* Med-High speed may not be provided on all models.
2,
Change the heat or cool blower motor speed by removing the
motor speed lead from the "Heat" or "Cool" terminal and re-
place it with the desired motor speed lead from the "MI" or
"M2" location. Connect the wire previously removed from the
"Heat" or "Cool" terminal to the vacated "M1" or "M2" termi-
nal.
3,
If the same speed must be used for both heating and cooling,
remove the undesired motor speed lead from the "Heat" or
"Cool" terminal and connect that lead to the open terminal at
"M1" or "M2" location or tape off. Attach ajumper between
the "Heat" and "Cool" terminals and the remaining motor
speed lead.
Note: When using the same speed on motors with (4) speed
leads, it will be necessary to tape off the terminal of the motor
speed lead removed from the "Heat" or "Cool" terminal with
electrical tape since an open terminal will not be available at
the "MI" or "M2" location.
Thoroughly check the system after modification to ensure the
proper operation of the circulating air blower in all modes of opera-
tion.
Continuous-Fan Operationusing "G"
Energizing the"G" terminal on the furnace control provides contin-
uous fan operation. This is done by connecting the G terminal of
11. Furnace Maintenance
the thermostat to the G terminal on the furnace control. When the
FAN switch is turned from auto to ON the fan will operate continu-
ously at "HEAT" speed. EAC will be energized in this mode.
NOTE: In heating, the fan will turn off during furnace ignition and
warm up then restart at heating speed.
Hard Wired Continuous-Fan Operation
A terminal is provided on the furnace control located in the circulat-
ing air blower compartment for operation of the continuous-fan
option. This connection is intended for the low speed motor tap,
and has a lower contact rating (8 amps) than the heat and cool
taps. When the low speed blower lead is connected to this termi-
nal, this will provide low speed blower operation whenever the oth-
er two speeds (Heat or Cool) are not energized. EAC not powered
in this mode.
Thoroughly check the system after modification to ensure the
proper operation of the circulating air blower in all modes of opera-
tion.
Separate speed selections for Heat, Cool, and
Continuous-Fan
Connect low speed lead from circulating air motor to the "Cont"
terminal at the furnace control. The appropriate motor leads
should already be connected to the "Heat" and "Cool" terminals.
Heating and Continuous-Fan Speed the Same
If it is necessary to operate the heating speed and continuous -fan
speed using the same blower speed, connect a jumper between
the "Heat" and "Cont" terminals on the furnace control.
Note: There should be only ONE motor lead going to the "Heat"
and "Cont" terminals.
FIRE, EXPLOSION, OR CARBON MONOXIDE
POISONING HAZARDS
Failure to have the furnace inspected and
maintained could result in death, personal injury
and/or property damage.
It is recommended that the furnace be inspected
and serviced on an annual basis (before the heating
season) by a qualified service agency.
See "User's Information Manual".
ELECTRICAL SHOCK, FIRE OR EXPLOSION
HAZARD
Failure to follow safety warnings exactly could
result in dangerous operation, serious injury, death
or property damage.
Improper servicing could result in dangerous
operation, death, personal injury or property
damage.
• Before servicing, disconnect all electrical power
to furnace.
• When servicing controls, label all wires prior to
disconnecting. Reconnect wires correctly.
• Verify proper operation after servicing.
441 01 2314 02 [_