Carrier 38AK012 User Manual download pdf

Installation, Start-Up and

Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS ...................1

INSTALLATION .............................1-8

Step 1 — Complete Pre-Installation Checks ...1

• UNCRATE UNIT

• INSPECT SHIPMENT

• CONSIDER SYSTEM REQUIREMENTS

Step 2 — Rig and Mount the Unit .............4

• RIGGING

• COMPRESSOR MOUNTING

Step 3 — Complete Refrigerant Piping

Connections ...............................4

• SIZE REFRIGERANT LINES

• FILTER DRIER AND MOISTURE INDICATOR

Step 4 — Make Electrical Connections ........6

• FIELD POWER SUPPLY

• FIELD CONTROL WIRING

START-UP ..................................9,10

Preliminary Checks ..........................9

Evacuate and Dehydrate ......................9

Refrigerant Charge ...........................9

Compressor Overload ........................9

Cycle-LOC™ Device ..........................9

Low-Pressure/Loss-of-Charge Switch (LPS) ...9

High-Pressure Switch (HPS) .................10

Time GuardT II Device .......................10

Refrigerant Service Ports ...................10

Cooling .....................................10

Sequence of Operation ......................10

Oil Charge ................................. 10

SERVICE ..................................11,12

Cleaning ....................................11

Lubrication .................................11

Condenser-Fan Adjustment ..................11

Capacity Control — Unit 38AKS012 Only .....12

Compressor Removal ....................... 12

Crankcase Heater ........................... 12

TROUBLESHOOTING GUIDE ...............13,14

START-UP CHECKLIST ...............CL-1, CL-2

SAFETY CONSIDERATIONS

Installing and servicing air-conditioning equipment can be

hazardous due to system pressure and electrical compo-

nents. Only trained and qualiﬁed service personnel should

install or service air-conditioning equipment.

When working on air-conditioning equipment, observe pre-

cautions in literature and on tags and labels attached to unit.

Follow all safety codes. Wear safety glasses and work gloves.

Use quenching cloth for brazing operations. Have ﬁre ex-

tinguisher available. Read these instructions thoroughly. Con-

sult local building codes and National Electrical Code (NEC)

(U.S.A. Standard) for special installation requirements.

Before installing or servicing system, always turn off

main power to system. There may be more than one

disconnect switch. Electrical shock can cause personal

injury.

INSTALLATION

The 38AK007, 008, and 012 units use hermetic compres-

sors. The 38AKS008, 009, and 012 units use semi-hermetic

compressors. See Table 1A or 1B for physical data.

Step 1 — Complete Pre-Installation Checks

UNCRATE UNIT (See Fig. 1) — Remove unit packaging

except for the top skid assembly and wood bumpers, which

should be left in place until after unit is rigged into place.

INSPECT SHIPMENT — File claim with shipping com-

pany if shipment is damaged or incomplete.

Fig. 1 — Model 38AK (Size 007 Shown)

38AK007,008,012

38AKS008,009,012

Air-Cooled Condensing Units

50/60 Hz

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

Book 1 4

Tab 3a 2a

PC 111 Catalog No. 533-876 Printed in U.S.A. Form 38A-7SI Pg 1 5-99 Replaces: 38A-6SI

1 2 ... 16

Summary of Contents

Page 1 - Service Instructions

Installation, Start-Up andService InstructionsCONTENTSPageSAFETY CONSIDERATIONS ...1INSTALLATION ...1-8Step

Page 2

High-Pressure Switch (HPS) — When the refriger-ant high-side pressure reaches 426 psig (2937 kPa), the HPSopens 24-v power to the compressor contactor

Page 3

SERVICEWhen servicing unit, shut off all electrical power to theunit to avoid shock hazard or injury from rotating parts.Cleaning — Inspect unit inter

Page 4

4. Adjust fan height as shown in Fig. 13.5. Tighten setscrews.6. Replace condenser-fan assembly.Capacity Control — Unit 38AKS012 Only — Asuction press

Page 5 - Fig. 3 — Rigging Label

TROUBLESHOOTING GUIDESYMPTOM CAUSE REMEDYCompressor does not run —Contactor openPower off. Restore power.Fuses blown. Replace with correct fuses after

Page 6

LEGEND AND NOTES FOR FIG. 15 AND 16C—Contactor, CompressorCAP — CapacitorCB — Circuit BreakerCH — Crankcase HeaterCLO — Compressor LockoutCOMP — Compr

Page 7 - Table 5 — Electrical Data

START-UP CHECKLISTA. Preliminary InformationOUTDOOR: MODEL NO. SERIAL NO.INDOOR: AIR HANDLER MANUFACTURERMODEL NO. SERIAL NO.ADDITIONAL ACCESSORIESB.

Page 8

CHECK VOLTAGE IMBALANCELINE-TO-LINE VOLTS: ABVAC VBC V(AB + AC + BC)/3 = AVERAGE VOLTAGE =VMAXIMUM DEVIATION FROM AVERAGE VOLTAGE =VVOLTAGE IMBALANCE

Page 9

Table 1A — Physical Data — 50/60 Hz (English)UNIT 38 AK007 AK008 AK012 AKS008 AKS009 AKS012OPERATING WEIGHT (lb)Aluminum Coils (Standard) 340 370 395

Page 10

Table 1B — Physical Data — 50/60 Hz (SI)UNIT 38 AK007 AK008 AK012 AKS008 AKS009 AKS012OPERATING WEIGHT (kg)Aluminum Coils (Standard) 154 168 179 231 2

Page 11 - Lubrication

CONSIDER SYSTEM REQUIREMENTS• Consult local building codes and NEC for special instal-lation requirements.• Allow sufficient space for airﬂow clearanc

Page 12

UNIT 38 DIM. A DIM. B DIM. C DIM. D DIM. E DIM. FAK00718-61⁄29 18-23⁄49 —18-21⁄49 18-45⁄169 28-95⁄169[470.0] [375.0] — [362] [415] [846.5]AK00818-89 1

Page 13 - TROUBLESHOOTING GUIDE

FILTER DRIER AND MOISTURE INDICATOR — The ﬁl-ter drier is factory installed. Moisture indicator is ﬁeld-supplied and should be installed just after li

Page 14 - Tab 3a 2a

Table 5 — Electrical DataUNIT38NOMINAL VOLTAGE(V-Ph-Hz)VOLTAGE RANGE COMPRESSOR OFM POWER SUPPLYMIN MAX RLA LRA FLA MCA MOCPAK007208/230-3-60 187 254

Page 15 - B. Pre-Start-Up

FIELD CONTROL WIRING — Install a Carrier-approvedaccessory thermostat assembly according to installationinstructions included with the accessory. Loca

Page 16 - C. Start-Up

START-UPPreliminary Checks1. Field electrical power source must agree with unit name-plate rating.2. Check that all internal wiring connections are ti

Related models: 38AK007 | 38AKS008 | 38AKS009 |

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Carrier 38AK012 User Manual

Browse online or download User Manual for Dryers Carrier 38AK012. Carrier 38AK012 User Manual

Summary of Contents

Related models: 38AK007 | 38AKS008 | 38AKS009 |

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