Legend, T 4-2, Figure 4 ceiling unit schematic -- cooling only – Carrier T--298 User Manual
Page 44: Figure 4 ceiling unit schematic -- heat/cool, Control pcb ass’y, Figure 4 ceiling unit, standard -- ducted, 4p 2p, Sw it asw
T--298
4-2
2P
GRN/YEL
ORN
WHT
WHT
ASM
PL
U
G
C
O
N
N
E
C
T
S
T
O
U
PPER
U
N
IT
.
SEE
D
IAG
R
A
M
S
U
PPL
IED
W
ITH
U
PPER
U
N
IT
F
O
R
AD
D
ITIO
N
AL
WIR
IN
G
.
4P
2P
1
1
2
3
4
2
{
ASW
O (OFF)
I (ON)
2
2 -- 1
SWITCH
POSITION
CONTACTS MADE
HIGH FAN
LOW FAN
OFF
LOW COOL
1--4 . 1--6
1--2 . 1--6
NONE
1--2 . 1--6 . 1--8
1--4 . 1--6 . 1--8
HIGH COOL
ASM : AIR SWEEP MOTOR
ASW : AIR SWEEP SWITCH
SW : SWITCH
IT : INDOOR THERMOSTAT
LEGEND
ORN
BLU
BLK
ORN
SW
IT
ASW
2
1
C
L
8
6
1
2
4
YEL
BLK
WHT
YEL
1
2
GRN/YEL
115 VAC
SUPPLY
WIRE
Figure 4--3 Ceiling Unit Schematic -- Cooling Only
2P
CEC
2P
PL
U
G
C
O
N
N
E
C
T
S
T
O
U
PPER
U
N
IT
.
SEE
D
IAG
R
A
M
S
U
PPL
IE
D
W
IT
H
U
PPER
U
N
IT
F
O
R
AD
D
IT
IO
N
AL
W
IRING
.
GRN/YEL
GRN/YEL
4P
2P
2
1
2
3
4
1
{
ASW
O (OFF)
1 (ON)
2
2 -- 1
SWITCH
POSITION
CONTACTS MADE
OFF
LOW FAN
HIGH FAN
LOW COOL
NONE
L1--L . L1--A
L1--H . L1--A
L2--C . L1--L . L1--A . B--3
L2--C . L1--H . L1--A . B--3
L2--HT . L1--L . L1--A . B--1
HIGH COOL
HEAT
ASM AIR SWEEP MOTOR
ASW AIR SWEEP SWITCH
SW SWITCH
CEC CLOSED END CONNECTOR
BT BIMETAL
IT INDOOR THERMOSTAT
LEGEND
ORN
BLU
BLK
ORN
ORN
WHT
WHT
ASM
HEATER--ASSY
SW
IT
ASW
2
1
1
1
3
2
1
L2
B
3
C
HT
A
L1
L
H
YEL
BLK
BLK
RED
YEL
BLU
BLK
BLK
WHT
WHT
WHT
WHT
HEATER
BT
1
1
2
2
115 VAC
SUPPLY
WIRE
Figure 4--4 Ceiling Unit Schematic -- Heat/Cool
1
2
2
2
1
3
1
1
1
Y
L
N1
N2
2
3 4
1 2
4
3
2
(--)
(+)
BLK
BLK
WHT
BLU
BLK
GRN/YEL
GRN/YEL
WHT
WHT
BLU
BLU
BLK
RED
2
4
CN9
CN9
1
3
5
7 8
6
CN1
CN4
CN4
CN1
CN2
CN3
RY1
RY2
D1
RY3
RY4
250V 3.15A
FUSE
1
1
2
3
4
5
6
7
7
6
5
4
3
2
RA Th
BRN
BLK
IDC Th
2
4
1
3
5
7 8
6
8
1
7
6
5
4
3
2
8
8
DISPLAY PCB AS
1
1
2
3
3
2
1
3
2
CONTROL
PCB
ASS’Y
LEGEND
IDC Th : INDO
o
R COIL THERMISTER
RA Th : ROOM AIR THERMISTER
KY : RELAY
DI : DIODE
115 VAC POWER
12 VDC POWER
Figure 4--5 Ceiling Unit, Standard -- Ducted