Carrier 38AQS012 User Manual download pdf

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 111 Catalog No. 533-80074 Printed in U.S.A. Form 38AQS-2W Pg 1 11-02 Replaces: 38AQS-1W

Book 1 4

Ta b 5 a 5 a

Wiring Diagrams

Units Produced After December 1998

DIAGRAM INDEX

38AQS Field Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fig. 1-4

Motormaster® Control Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fig. 5-12

LEGEND (Fig. 1 through 12)

NOTES

1. Compressor and fan motor(s) thermally protected. Three-phase

motors are protected against primary single-phasing conditions.

2. If any of the original wire furnished must be replaced, it must be

replaced with type 90 C wire or its equivalent.

3. Terminal block 2 (TB2) is for field external control connections,

Class 2 wiring. Supply voltage at TB2 is 24 vac. Maximum

power available at TB2 is 31.5 va.

4. Field-supplied component ratings: IFC sealed coil rating

(24 vac) 12 va max.

5. Use thermostat HH07AT172 with subbase HH93AZ177.

6. Use copper, copper-clad aluminum, or aluminum conductors for

field power supply only.

7. Insulate unused lead when changing tap for 208 volt use.

8. The CB must-trip amps are equal to or less than 140% FLA.

9. Set thermostat heat anticipator(s) for first stage .79; for second

stage .63.

10. The CLO locks out the compressor to prevent short cycling on

compressor overload and safety devices. Before replacing CLO,

check these devices.

11. Remove jumper between RC and RH.

12. Defrost cycle time is factory set at 30 min.

UNIT LABEL DIAGRAM

Unit

38AQS

V-Ph -Hz

Label Diagram

No.

Schematic

Figure

Component Arrangement

Figure

012,016

208/230-3-60

38AK502714 1 2230-5-50

400-3-50

460-3-60

38AK502724 3 4

575-3-60

38AQS012,016

Air-Cooled Split System Heat Pump

50/60 Hz

AHA —

Adjustable Heat Anticipator

C—

Contactor

CAP —

Capacitor

CB —

Circuit Breaker

CC —

Cooling Compensator

CH —

Crankcase Heater

CLO —

Compressor Lockout

COMP —

Compressor

CR —

Control Relay

CT —

Current Transformer

CTD —

Compressor Time Delay

DB —

Defrost Board

DFB —

Defrost Board

DFR —

Defrost Relay

DFT —

Defrost Thermostat

EQUIP —

Equipment

FCPS —

Fan Cycling Pressurestat

FLA —

Full Load Amps

FU —

Fuse

GND —

Ground

HPS —

High-Pressure Switch

HR —

Heater Relay

IFC —

Indoor-Fan Contactor

IP —

Internal Protector

L—

Light

LCS —

Loss-of-Charge Switch

LLS —

Liquid Line Solenoid

LOR —

Lockout Relay

NDR —

No-Dump Relay

NEC —

National Electrical Code

OFC —

Outdoor-Fan Contactor

OFM —

Outdoor-Fan Motor

OFR —

Outdoor-Fan Relay

OPS —

Oil Pressure Switch

PCB —

Printed Circuit Board

QT —

Quadruple Terminal

R—

Isolation Relay

RC —

Cooling Connection (Thermostat)

RH —

Heating Connection (Thermostat)

RVR —

Reversing Valve Relay

RVS —

Reversing Valve Solenoid

SOL —

Solenoid

TB —

Terminal Block Terminal

TC —

Thermostat — Cooling

TH —

Thermostat — Heating

TRAN —

Transformer

U—

Unloader

UR —

Unloader Relay

Terminal (PCB, Field)

Terminal (Marked)

Terminal (Unmarked)

Terminal Block

Splice (Factory)

Splice (Field)

Splice (Marked Wire)

Wiring Factory

Wiring Field Control

Wiring Field Power

Option or Accessory

PCB Run

1 2 3 4 5 6 ... 11 12

Summary of Contents

Page 1 - Wiring Diagrams

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 1

Page 2

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 1

Page 3

11MOTORMASTER® CONTROL TEMPLATE

Page 4

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 1

Page 5

2SEQUENCE OF OPERATION — 38AQS012,016 OUTDOOR UNITAssume the power is on and the thermostat is set at SYS-TEM AUTO, FAN AUTO. and desired temperature.

Page 6

3Fig. 1 — Schematic — 38AQS012,016; 208-230/3/60, 230/3/50 and 400/3/50 Units

Page 7 - Pre-Installation

4Fig. 2 — Component Arrangement — 38AQS012,016; 208-230/3/60, 230/3/50 and 400/3/50 Units

Page 8 - Fig. 6 — Wind Baffle Details

5Fig. 3 — Schematic — 38AQS012,016; 460/3/60 and 575/3/60 Units

Page 9 - Installation —

6Fig. 4 — Component Arrangement — 38AQS012,016; 460/3/60 and 575/3/60 Units

Page 10 - Ta b 5 a 5 a

7MOTORMASTER® CONTROL(LOW AMBIENT KIT)INSTALLATIONThe accessory low-ambient kit contains a fan speed (Motor-master) control device activated by a temp

Page 11 - MOTORMASTER® CONTROL TEMPLATE

8DIMENSIONS (ft-in.)*As viewed from access panel side.Fig. 6 — Wind Baffle DetailsBAFFLE LOCATION ARight-Hand Side*2-511/16(754.3 mm)Back5-81/8(1730.3

Page 12

9Installation — After completing the pre-installation steps,proceed as follows:MOUNT CONTROL ASSEMBLY1. See Fig. 7 for the location of the access pane