Carrier T--298 service manual Ceiling Unit Schematic -- Cooling Only

BLK

UPPER UNIT FOR ADDITIONAL WIRING.

SWITCH

4

CONTACTS MADE

POSITION

4P

PLUG CONNECTS TO UPPER UNIT.

HIGH FAN

1--4 . 1--6

2

BLU

1

SEE DIAGRAM SUPPLIED WITH

LOW FAN

1--2 . 1--6

NONE

ASW

2

OFF

ORN

LOW COOL

1--2 . 1--6 . 1--8

1

6

ORN

1

WHT

3

HIGH COOL

1--4 . 1--6 . 1--8

2

BLK

1

2

2P

4

ASW

O (OFF)

2

YEL

I (ON)

2 -- 1

L

ORN

WHT

8

C

GRN/YEL

115 VAC

LEGEND

SUPPLY

SW

IT

ASM

WIRE

2P

{

ASM : AIR SWEEP MOTOR

WHT

1

ASW : AIR SWEEP SWITCH

YEL

SW : SWITCH

GRN/YEL

2

IT : INDOOR THERMOSTAT

Figure 4--3 Ceiling Unit Schematic -- Cooling Only

SW

4P

SWITCH

BLK

POSITION

CONTACTS MADE

H

1

OFF

NONE

BLU

2

LOW FAN

L1--L . L1--A

L

L1--H . L1--A

HIGH FAN

L1

WHT

ORN

ORN

3

PLUG CONNECTS TO UPPER UNIT.

LOW COOL

L2--C . L1--L . L1--A . B--3

A

2

1

2P

BLK

YEL

IT

ASW

1

2

4

SEE DIAGRAM SUPPLIED WITH UPPER UNIT FOR ADDITIONAL

HIGH COOL

L2--C . L1--H . L1--A . B--3

1

1

HEAT

L2--HT . L1--L . L1--A . B--1

ORN

WHT

B

RED

2

GRN/YEL

3

3

ASW O (OFF)

2

BLU

HEATER--ASSY

ASM

BLK

1 (ON)

2 -- 1

115 VAC

HT

BLK

BLK

HEATER

LEGEND

2

SUPPLY

WHT

1

BT

ASM AIR SWEEP MOTOR

WIRE

L2

C

2P

WHT

ASW AIR SWEEP SWITCH

{

2P

WIRING.

SW SWITCH

WHT

WHT

1

IT

INDOOR THERMOSTAT

CEC CLOSED END CONNECTOR

CEC

YEL

GRN/YEL

2

BT BIMETAL

Figure 4--4 Ceiling Unit Schematic -- Heat/Cool

LEGEND
IDC Th : INDOoR COIL THERMISTER
RA Th : ROOM AIR THERMISTER							1	2	3	4		2	1
	KY : RELAY
								BLU		GRN/YEL		BLK	WHT
	DI : DIODE
							BLK		WHT
							3	2	1	CN3		Y
RA Th	BLK	CN1		CN4		CN4								RY1
		1
				1	1	1
		2
				2	2	2
		3	CONTROL
				3	3	3
		4														BLK
IDC Th	BRN			4	4	4	RY3	RY2						L			115 VAC POWER
			PCB	5	5	5								N2		WHT
				6	6	6								N1
				7	7	7
			ASS’Y	8	8	8										GRN/YEL
				1	1	1						FUSE D1		2	RED		(+)
															BLK
				2	2	2					RY4	250V 3.15A		1			(--)
				3	3	3
														CN1			12 VDC POWER
		CN9	1 2 3 4 5 6 7 8					CN2		1	2
		CN9 1 2 3 4 5 6 7 8									BLU
		DISPLAY PCB AS									BLU
				Figure 4--5 Ceiling Unit, Standard -- Ducted

T--298 4-2