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38YDA 2-Speed Heat Pump Unit Wiring Diagrams

L1 C1 11 C2 EQUIP GND 17 SC 27 T2 21 T7

MAIN EXT LOW MAIN START

SCHEMATIC DIAGRAM

(LADDER FORM) C2 24 COMP 14 T1

HIGH START

L2

LEGEND

FACTORY POWER WIRING FIELD POWER WIRING FACTORY CONTROL WIRING FIELD CONTROL WIRING COMPONENT CONNECTION FIELD SPLICE JUNCTION 2 SPD CONT CONTACTOR WITH MECHANICAL INTERLOCK 2 SPD CTL TWO-SPEED CONTROL BR BLEED RESISTOR C1 LOW SPEED (240V COIL) C2 HIGH SPEED (240V COIL) CAP CAPACITOR CCH CRANKCASE HEATER COMP COMPRESSOR FLT1 POWER FILTER HPS HIGH PRESSURE SWITCH HSSR HIGH SPEED START RELAY LED SYSTEM FUNCTION LIGHT LPS LOW PRESSURE SWITCH LSSR LOW SPEED START RELAY ODF OUTDOOR FAN MOTOR (VAR. SPEED) RVS REVERSING VALVE SOLENOID SC START CAPACITOR TDF THERMISTOR DEFROST TOA THERMISTOR (OUTDOOR AIR)

T8 C2 CAP

H

T3 2 HS 1 SR 2 LS 1 SR

15 BR 16 12 13

C2 C1 C1

25 26 22 23 FLT1

LOAD LINE

5

C

5

ODF

VS CCH

COMP

S2 PTC MOTOR S1 PROTECTION (SEE NOTE)

C1

LPS RVS

HPS

TDF

TOA

C2

HI

LO CCH ODF O C LM1 LM2 PW2 PW1 L2 S1 S2 DFT1 T1 T2 DFT2

K2 K2 K1 K3 K4 2 SPD CTL TYPICAL INDOOR THERMOSTAT

R ON

FAN AUTO

LOGIC K2 K1 K3 K4

P1 R1 L

2

8

7

5

9

6

1 10 C

R Y1 Y2 W2 W3 O R G

Y1

G

COOL OFF HEAT

C1 C2

H2 H1

Y2 W

Y W2 W3

Co

O C L

O C

TYPICAL INDOOR TERMINAL BLOCK

NOTES: 1. COMPRESSOR FURNISHED WITH INTERNAL PTC TYPE THERMAL OVERLOADS, SENSED BY EXTERNAL MEANS. 2. FAN MOTOR FURNISHED WITH INHERENT THERMAL PROTECTION. 3. TO BE WIRED IN ACCORDANCE WITH NATIONAL ELECTRIC CODE AND LOCAL CODES. 4. OUTDOOR UNIT CONTROL REQUIRES A MINIMUM OF 27VA, 24 VAC CONTROL POWER. 5. USE COPPER CONDUCTORS ONLY. 6. IF INDOOR SECTION HAS A TRANSFORMER WITH A GROUNDED SECONDARY, CONNECT THE GROUNDED SIDE TO THE BRN LEAD, "C". 7. IF ANY OF THE ORIGINAL WIRE, AS SUPPLIED, MUST BE REPLACED, USE THE SAME OR EQUIVALENT WIRE. 8. CHECK ALL ELECTRICAL CONNECTIONS INSIDE CONTROL BOX FOR TIGHTNESS. 9. DO NOT ATTEMPT TO OPERATE UNIT UNTIL SERVICE VALVES HAVE BEEN OPENED (BACK SEATED). 10. MUST USE THERMOSTAT LISTED IN PRE-SALE LITERATURE.

321673-401 REV. A

A94019

Fig. 1--38YDA036, 048, 060 208/230v, 1 Phase, 60 Hertz

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 PC 101 Catalog No. 563-768 Printed in U.S.A. Form 38YDA-1W Pg 1 2-94 Replaces: New Tab 5a 5a

230 V 60 HZ 10 POWER SUPPLY

CONNECTION DIAGRAM

L1 L2 EQUIP GND

BLK YEL BLK BLK BLU RED YEL BLU YEL BLK BLU BLK

MECHANICAL INTERLOCK

YEL BLK

BLK

2 SPD CONT

BLK

EARTH GND

BLK

CONTROL BOX

YEL BLK

14 C2 24

RED

15 25

16 26

17 27

RED

11 21

12 22

13 C1 23

BLU BLU

RED BLU VIO

BLK BLU YEL

BLK BLU YEL RED RED BLU RED BLU

2

BLK BLU ORN ORN YEL BLU RED RED YEL BLU BLU BLU BLU BLU VIO VIO BLU YEL YEL BLK BLU LINE

L2 LO HI ODF O C LM1 DFT1 TI T2 S2 S1 PW1 CCH LM2 DFT2 PW2 P1 1

18 18

1

LS 5 SR 2 HS 5 SR

BLU

YEL YEL

1

FLT1

LOAD BLK

R

LED

WHT

CAP

C H

SC

BLK

R1

12

5 6 7 8 9 10

WHT

ORN

BLK

2 SPD CTL

BRN

SEE OFF ON NOTE SPEED-UP

SSL DT BP

BLK GRN YEL BLU

BRN

FI

BR

ORN

ODF

BLU YEL

C R W2 O Y2 Y1 W3 L

RED

VS TOA

BLU

WHT

GRA

PNK

RED VIO BLK YEL BLU BLU

YEL

VIO BLK RED

BLU

TOA

BLU BLU

RED RED BLK BLK S1 YEL

T3

T8

T1

T7 T2

COMP

S2 PTC MOTOR PROTECTION (SEE NOTE)

TO INDOOR UNIT JUMPER NOTE:

HPS

BLU BLU YEL

LPS

CCH

(#11 THRU #14 OF PLUG ASSY) WHT JUMPER- 060 SIZE UNITS ORN JUMPER- 048 SIZE UNITS NO JUMPER- 036 SIZE UNITS

RVS

ORN ORN

VIO VIO NOTE: 1,500 to 7,800 ohms -SAFE RANGE 26,000 to 34,000 ohms -TRIP RANGE 8,400 to 10,000 ohms -TO RESET

A93590

Fig. 2--38YDA036, 048, 060 208/230v, 1 Phase, 60 Hertz

Copyright 1994 CARRIER Corp. · 7310 W. Morris St. · Indianapolis, IN 46231

13145c

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 4 PC 101 Catalog No. 563-768 Printed in U.S.A. Form 38YDA-1W Pg 2 2-94 Replaces: New Tab 5a 5a

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