24−V Wiring; Accessories - International comfort products N8MSN Installation Instructions Manual

115−VAC (L2) NEUTRAL
Figure 26 - Heating and Cooling Application Wiring Diagram with Single Stage Thermostat
THREE−WIRE
HEATING−ONLY
BLOWER DOOR SWITCH
BLK BLK
WHT WHT
GND
AUXILIARY
115−V FIELD−
J−BOX
SUPPLIED
DISCONNECT
24−V WIRING
Make field 24−v connections at the 24−v terminal strip. (See
Figure 25) Connect terminal Y as shown in Figure 26 for
proper cooling operation.
color−coded, copper thermostat wire.
The 24−v circuit contains an automotive−type, 3−amp. fuse
located on the control. Any direct shorts during installation,
service, or maintenance could cause this fuse to blow. If fuse
replacement is required, use ONLY a 3−amp. fuse of identical
size.
22
Figure 25 - Furnace Control
OFF−DELAY
J2 JUMPER
24−V THERMOSTAT
TERMINALS
3−AMP FUSE
COM/BLUE
24VAC/RED
LED OPERATION &
DIAGNOSTIC LIGHT
Ï Ï Ï
Ï Ï Ï
CONNECTIONS
Ï Ï Ï
SPARE1
SPARE1
BLOWER SPEED
SPARE2
SELECTION TERMINALS
NOTE 2
W C
FIVE WIRE
W
C
R
O
N
T
GND R
G
O
L
C
Y
24−V
TERMINAL
BLOCK
NOTES:
FURNACE
Use only AWG No.
HEAT
TWINNING AND/OR
COMPONENT TEST
TERMINAL
HUM
24VAC
SPARE2
EAC 1 AMP HUM
XFMR
115 VAC
(L1) LINE
EAC TERMINAL
HUMIDIFIER
VOLTAGE
(115 VAC 1.0
TERMINAL
CONNECTION
AMP MAX.)
115−VAC
THERMOSTAT
R G Y
TERMINALS
NOTE 1
CONDENSING
UNIT
TWO
WIRE
1. Connect Y−terminal in furnace as shown for proper blower operation.
2. Some thermostats require a "C" terminal connection as shown.
3. If any of the original wire, as supplied, must be replaced, use
same type or equivalent wire.

ACCESSORIES

1. Electronic Air Cleaner (EAC):
Connect an accessory Electronic Air Cleaner (if used)
18, using 1/4−in female quick connect terminals to the two
male 1/4−in quick−connect terminals on the control
board marked EAC 1 AMP and NEUTRAL. The termin-
als are rated for 115 VAC, 1.0 amps maximum and are
energized during blower motor operation. (See
Figure 24)
HUMIDIFIER TERMINAL
(24−VAC 0.5 AMP MAX)
TRANSFORMER 24−VAC
CONNECTIONS
P1 − LOW VOLTAGE MAIN
HARNESS CONNECTOR
P2
IND
HSI
P2−HOT SURFACE IGNITOR (HSI) & INDUCER
MOTOR (IND) CONNECTOR
FIELD 24−V WIRING
FIELD 115−, 208/230−, 460−V WIRING
FACTORY 24−V WIRING
FACTORY 115−V WIRING
FIELD−SUPPLIED
DISCONNECT
208/230− OR
460−V
THREE
PHASE
208/230−V
SINGLE
PHASE
GND
441 01 1402 02