SYSTEM OPERATION
23
R RGT TT T R TR T
B T T T T T R T JT
BX
T
R T RK TR RG T JT
BX T T BK R T
Connect hot, neutral, and ground wires as shown in the wiring
diagram located on the unit’s blower door. Line polarity must
connections can be made through either the right or left side
panel.
located inside the burner compartment. To make electrical
connections through the opposite side of the furnace, the
junction box must be relocated to the other side of the burner
compartment prior to making electrical connections.
N Wire routing must not interfere with circulator
T
T RK TR K JR R T T
R T B TR GR R T
R TR B T T TT T T
T
TR
G
TG
T
R BR RG R
GG TR RG
T R
R
B
R
T
R
T
RRT G R JR R T
1.0 Amp maximum at 120 VAC
1.0 Amp maximum at 120 VAC
Turn OFF power to the furnace before installing any
instructions for locating, mounting, grounding, and controlling
these accessories.
If it is necessary for the installer to supply additional line
voltage wiring to the inside of the furnace, the wiring must
conform to all local codes, and have a minimum temperature
rating of 105°C. All line voltage wire splices must be made
inside the furnace junction box.
The integrated control module electronic air cleaner terminals
(EAC) are energized with 115 volts whenever the circulator
blower is energized.
Low voltage connections can be made through either
the right or left side panel. Wire routing must not interfere
maintenance.
A 40 V.A. transformer and an integrated electronic control
are built into the furnace to allow use with most cooling
equipment. Consult the wiring diagram located in this manual,
the installation manual, or on the blower door for further details
of 115 Volt and 24 Volt wiring.
The *MEC96 furnace has W1 & W2 terminals for connection
of a two stage heating thermostat. If desired, a thermostat
with only one stage of heat may be used. As shipped, the
furnace S1-1 switch is OFF; S1-2 switch is ON. This is the
correct position to use a single stage heating thermostat with
R
Y C
Furnace
Integrated
Control
Module
Remote Condensing Unit
(Single-Stage Cooling)
R
Thermostat - Single -Stage Heating with Single-Stage Cooling
NOTE:
must
R
Y C
Furnace
Integrated
Control
Module
Remote Condensing Unit
(Single-Stage Cooling)
R
Thermostat - Two-Stage Heating with Single-Stage Cooling
W1 W2
Y
Furnace
Integrated
Control
Module
Remote Condensing Unit
(Two-Stage Cooling)
Y2
W1 W2
Y2
Thermostat - Two-Stage Heating with Two-Stage Cooling
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