Carrier 38Ak008 Users Manual

38aks012 9f191b9d-cc5c-4991-b28a-3972dd6fe241 Carrier Clothes Dryer 38AKS012 User Guide |

2015-01-24

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

PC 111 Catalog No. 533-80003 Printed in U.S.A. Form 38A-9SI Pg 1 5-01 Replaces: 38A-8SI

Book 1 4

Ta b 3 a 2 a

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-11

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

Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

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

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

Compressor Overload. . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Cycle-LOC™ Device (CLO) . . . . . . . . . . . . . . . . . . . . . . 10

Low-Pressure/Loss-of-Charge Switch (LPS). . . . . 10

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

High Flow Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

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

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

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

Oil Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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

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

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

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

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

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

Crankcase Heater (Except 38AK007) . . . . . . . . . . . . 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 components.

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.

NOTE: Ensure voltage listed on unit data plate agrees with

electrical supply to unit.

Follow all safety codes. Wear safety glasses and work

gloves. Use quenching cloth for brazing operations. Have fire

extinguisher available. Read these instructions thoroughly.

Consult local building codes and National Electrical Code

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

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 company

if shipment is damaged or incomplete.

Before installing or servicing system, always turn off main

power to system and install lockout tag on disconnect.

There may be more than one disconnect switch. Electrical

shock can cause personal injury.

38AK007,008,012

38AKS008,009,012

Air-Cooled Condensing Units

50/60 Hz

Fig. 1 — Model 38AK (Size 007 Shown)

Table 1A — Physical Data — 50/60 Hz (English)

LEGEND

NEMA — National Electrical Manufacturing Association

*Unit is factory supplied with holding charge only.

†Storage capacity of condenser coil with coil 80% full of liquid R-22 at 124 F.

NOTE: Unit 38AKS012 has one step of unloading. Full load is 100% capacity, and one

step of unloading is 67% capacity. Unit 38AKS012 has the following unloader settings:

load is 70 ± 1 psig and unload is 60 ± 2 psig.

UNIT 38 AK007 AK008 AK012 AKS008 AKS009 AKS012

OPERATING WEIGHT (lb)

Aluminum Coils (Standard) 340 392 426 510 564 564

Copper Coils (Optional) 386 460 503 578 632 632

RIGGING WEIGHT (lb)

Aluminum Coils (Standard) 390 442 476 560 614 614

Copper Coils (Optional) 436 510 553 628 682 682

REFRIGERANT* R-22

COMPRESSOR Bristol, Reciprocating Copeland, Scroll Copeland, Scroll Reciprocating, Semi-Hermetic

Quantity...Type 1...H26A72Q 1...ZR94KC 1...ZR125KC 1...06DA818 1...06DA824 1...06DH824

(See Note)

Quantity Cylinders 2——4 6

Speed (rpm) — 60 Hz 3500 3500 3500 1750 1750

— 50 Hz 1460 1460

Oil Charge (oz) 65 85 110 88 128

CONDENSER FAN — 60 Hz Propeller; Direct Drive

Quantity...Rpm 1...850 1...1100

Diameter (in.) 26 26

Motor Hp (NEMA) 1/33/4

Nominal Airflow (cfm) 3800 6500 7000 6500 6500 6500

CONDENSER FAN — 50 Hz Propeller; Direct Drive

Quantity...Rpm 1...960

Diameter (in.) 26

Motor Hp (NEMA) 1/3

Nominal Airflow (cfm) 3150 5400 5800 5400 5400 5400

CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced Fins

Face Area (sq ft) 12.24 15.75 20.5 18.0 18.0 18.0

Storage Capacity (lb)† 11.26 14.88 18.87 16.56 16.56 16.56

CONNECTIONS (sweat)

Suction (in.) 11/811/811/811/811/811/8

Liquid (in.) 1/21/25/81/25/85/8

CONTROLS

Pressurestat Settings (psig)

High Cutout 426 ± 7

Cut-in 320 ± 20

Low Cutout 7 ± 3

Cut-in 22 ± 5

Table 1B — Physical Data — 50/60 Hz (SI)

LEGEND

NEMA — National Electrical Manufacturing Association

*Unit is factory supplied with holding charge only.

†Storage capacity of condenser coil with coil 80% full of liquid R-22 at 51 C.

NOTES:

1. Unit 38AKS012 has one step of unloading. Full load is 100% capacity, and one

step of unloading is 67% capacity. Unit 38AKS012 has the following unloader

settings: load is 483 ± 6.9 kPa and unload is 414 ± 13.8 kPa.

2. Equivalent mm values for connectors are as follows:

in. mm

1/212.7

5/815.9

11/828.6

UNIT 38 AK007 AK008 AK012 AKS008 AKS009 AKS012

OPERATING WEIGHT (kg)

Aluminum Coils (Standard) 154 177 192 231 256 256

Copper Coils (Optional) 175 208 215 262 287 287

RIGGING WEIGHT (kg)

Aluminum Coils (Standard) 176 200 215 254 279 279

Copper Coils (Optional) 198 231 250 285 309 309

REFRIGERANT* R-22

COMPRESSOR Bristol, Reciprocating Copeland, Scroll Copeland, Scroll Reciprocating, Semi-Hermetic

Quantity...Type 1...H26A72Q 1...ZR94KC 1...ZR125KC 1...06DA818 1...06DA824 1...06DH824

(See Note 1)

Quantity Cylinders 2——4 6

Speed (r/s) — 60 Hz 58.4 58.4 58.4 29.2 29.2

— 50 Hz 48.4 48.4 48.4 24.2 24.2

Oil Charge (L) 1.92 2.51 3.25 2.60 3.78

CONDENSER FAN — 60 Hz Propeller; Direct Drive

Quantity...R/s 1...14.2 1...18.3

Diameter (mm) 660 660

Motor Hp (NEMA) 1/33/4

Nominal Airflow (L/s) 1800 3050 3300 3050 3050 3050

CONDENSER FAN — 50 Hz Propeller; Direct Drive

Quantity...R/s 1...16.0

Diameter (mm) 660

Motor Hp (NEMA) 1/3

Nominal Airflow (L/s) 1490 2550 2750 2550 2550 2550

CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced Fins

Face Area (sq m) 1.14 1.46 1.90 1.67 1.67 1.67

Storage Capacity (kg)† 5.1 6.75 8.6 7.5 7.5 7.5

CONNECTIONS (sweat)

Suction (in.) 11/811/811/811/811/811/8

Liquid (in.) 1/21/25/81/25/85/8

CONTROLS

Pressurestat Settings (kPa)

High Cutout 2937 ± 48

Cut-in 2206 ± 138

Low Cutout 48 ± 20

Cut-in 151 ± 34

CONSIDER SYSTEM REQUIREMENTS

• Consult local building codes and NEC for special instal-

lation requirements.

• Allow sufficient space for airflow clearance, wiring,

refrigerant piping, and unit servicing. See Fig. 2.

• Locate unit so that condenser airflow is unrestricted on

all sides and above. Refer to Fig. 2.

• Unit may be mounted on a level pad directly on base

rails or mounted on raised pads at support points. See

Table 2 for weight distribution based on recommended

support points.

NOTE: If vibration isolators are required for a particular instal-

lation, use corner weight information in Table 2 to make

proper selection.

Table 2 — Weight Distribution

NOTES:

1. Dimensions in [ ] are in millimeters.

2. See Fig. 3 for additional information.

Step 2 — Rig and Mount the Unit

RIGGING — These units are designed for overhead rigging.

Refer to rigging label for preferred rigging method. Spreader

bars are not required if top crating is left on unit. All panels

must be in place when rigging. (See Fig. 3.) As further protec-

tion for coil faces, plywood sheets may be placed against sides

of unit, behind cables. Run cables to a central suspension point

so that angle from the horizontal is not less than 45 degrees.

Raise and set unit down carefully.

If it is necessary to roll unit into position, mount unit on

rails, using a minimum of 3 rollers. Apply force to rails, not

unit. If unit is to be skidded into position, place it on a large pad

and drag it by the pad. Do not apply any force to unit.

Raise from above to lift unit from rails or pad when unit is

in final position.

After unit is in position, remove all shipping materials and

top crating.

COMPRESSOR MOUNTING — Compressors are shipped

from the factory held down by 4 bolts. After unit is installed,

loosen each bolt until the snubber washer can be moved with

finger pressure. See Fig. 4.

Step 3 — Complete Refrigerant Piping Con-

nections — Suction connection is sweat with plastic

cap; liquid connection is sweat with plastic cap. Refer to

Table 3A or 3B for the proper line sizes. Follow standard

piping practices.

SIZE REFRIGERANT LINES — Consider length of piping

required between condensing unit and air handler, amount of

liquid lift, and compressor oil return. See Table 4A and 4B and

also refer to Part 3 of Carrier System Design Manual for design

details and line sizing. Refer to air handler installation instruc-

tions for additional information.

Table 3A — Refrigerant Piping Sizes — 60 Hz

LEGEND

Table 3B — Refrigerant Piping Sizes — 50 Hz

LEGEND

NOTES FOR TABLES 3A AND 3B:

1. Pipe sizes are based on a 2 F (1 C) loss for liquid and suction

lines.

2. Pipe sizes are based on the maximum linear length shown for

each column, plus a 50% allowance for fittings.

3. Charge units with R-22 in accordance with unit installation

instructions.

4. Line size conversion to mm is:

in. mm

1/212.7

5/815.9

11/828.6

13/834.9

UNIT

38AK

STD UNIT CORNER

CORNER

Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg

With Aluminum Coil

007 340 154 86 39 53 24 77 35 124 56

008 392 177 86 39 78 35 99 45 107 49

012 426 192 89 40 92 42 109 49 105 48

S008 510 231 115 52 89 40 133 60 173 87

S009,S012 564 256 133 60 97 44 141 64 193 88

With Copper Coil

007 386 175 106 48 65 30 82 37 133 60

008 460 208 114 52 95 43 108 49 121 55

012 503 215 118 53 116 53 119 54 119 54

S008 578 262 143 65 106 48 142 64 187 85

S009,S012 632 287 161 73 114 52 150 68 207 94

Be sure unit panels are securely in place prior to rigging.

LINEAR LENGTH OF PIPING — FT (M)

UNIT

0-25

(0-7.6)

25-50

(7.6-15.2)

50-75

(15.2-22.9)

75-100

(22.9-30.5)

Line Size (in. OD)

LSLSLSLS

AK007 1/211/81/211/81/211/81/211/8

AK008 1/211/81/211/85/811/85/813/8

AK012 5/811/85/813/85/813/85/813/8

AKS008 1/211/81/211/85/811/85/813/8

AKS009 5/811/85/811/85/813/85/813/8

AKS012 5/811/85/811/85/813/85/813/8

L—

Liquid LIne

S—

Suction Line

LINEAR LENGTH OF PIPING — FT (M)

UNIT

0-25

(0-7.6)

25-50

(7.6-15.2)

50-75

(15.2-22.9)

75-100

(22.9-30.5)

Line Size (in. OD)

LSLSLSLS

AK007 1/211/81/211/81/211/81/211/8

AK008 1/211/81/211/85/813/85/813/8

AK012 5/811/85/813/85/813/85/813/8

AKS008 1/211/81/211/85/813/85/813/8

AKS009 5/811/85/811/85/813/85/813/8

AKS012 5/811/85/811/85/813/85/813/8

L—

Liquid LIne

S—

Suction Line

UNIT 38 DIM. A DIM. B DIM. C DIM. D DIM. E DIM. F

AK007 1′-61/2

″

[470.0]

1′-23/4

″

[375.0]

—

1′-21/4

″

[362]

1′-45/16

″

[415]

2′-95/16

″

[846.5]

AK008 1′-8″

[508.0]

1′-61/2

″

[470.0]

—

1′-3″

[381]

2′-5/16

″

[613]

3′-57/16

″

[1052.5]

AK012 1′-9″

[533.4]

1′-8″

[508.0]

2′-0″

[609.6]

1′-3″

[381]

2′-5/16

″

[613]

3′-57/16

″

[1052.5]

AKS008 1′-6″

[457.2]

1′-43/4

″

[425.5]

2′-913/16

″

[858.8]

1′-3″

[381]

2′-5/16

″

[613]

3′-57/16

″

[1052.5]

AKS009 1′-7″

[482.6]

1′-5″

[431.8]

2′-913/16

″

[858.8]

1′-3″

[381]

2′-5/16

″

[613]

3′-57/16

″

[1052.5]

AKS012 1′-7″

[482.6]

1′-5″

[431.8]

2′-913/16

″

[858.8]

1′-3″

[381]

2′-5/16

″

[613]

3′-57/16

″

[1052.5]

NOTES:

1. Dimensions in [ ] are in millimeters.

2. Center of Gravity. See chart for

dimensions.

3. Direction of Airflow.

4. Minimum clearance (local codes or jurisdiction

may prevail):

a. Condenser coil, for proper airflow, 36 in. [914]

one side, 12 in. [305] the other. The left or rear

side getting the greater clearance is optional.

b. Overhead, 60 in. [1524] to assure proper con-

denser fan operation.

c. Between units, control box side, 42 in. [1067]

per NEC (National Electrical Code) (U.S.A.

Standard).

d. Between unit and ungrounded surfaces, con-

trol box side, 36 in. [914] per NEC.

e. Between unit and block or concrete walls and

other grounded surfaces, control box side,

42 in. [1067] per NEC.

5. With the exception of the clearance for the con-

denser coil as stated in Note 4b, a removable

fence or barricade requires no clearance.

6. Units may be installed on combustible floors

made from wood or Class A, B, or C roof covering

material.

ELECTRICAL CONNECTIONS

SERVICE VALVE CONNECTIONS — 50/60 Hz

CONNECTION SIZES

AA 13/8

″ Dia [35] Field Power Supply Hole

BB 2″ Dia [51] Power Supply Knockout

CC 21/2

″ Dia [64] Power Supply Knockout

DD 7/8

″ Dia [22] Field Control Wiring Hole

UNIT 38 SUCTION LIQUID

AK007 11/8

″ [28.6] 11/2

″ [12.7]

AK008 11/8

″ [28.6] 11/2

″ [12.7]

AK012 11/8

″ [28.6] 15/8

″ [15.9]

AKS008 11/8

″ [28.6] 11/2

″ [12.7]

AKS009 11/8

″ [28.6] 15/8

″ [15.9]

AKS012 11/8

″ [28.6] 15/8

″ [15.9]

Fig. 2 — Dimensions (ft-in.)

Fig. 3 — Rigging Label

*Weights are for aluminum coils.

UNIT

RIGGING

WEIGHT* ABC

lb kg in. mm in. mm in. mm

AK007 390 176 45.0 1143 38.5 978 35.5 904

AK008 442 200 45.0 1143 38.5 978 43.5 1105

AK012 476 215 45.0 1143 38.5 978 43.5 1105

AKS008 560 254 45.0 1143 38.5 978 43.5 1105

AKS009 614 279 45.0 1143 38.5 978 43.5 1105

AKS012 614 279 45.0 1143 38.5 978 43.5 1105

FILTER DRIER AND MOISTURE INDICATOR — The fil-

ter drier is factory installed. Moisture indicator is field-supplied

and should be installed just after liquid line shutoff valve. Do

not use a receiver; there is none provided with unit and one

should not be used.

NOTE: Unit is shipped with R-22 holding charge. System

pressure must be relieved before removing caps. Recover

refrigerant prior to brazing.

Pass nitrogen or other inert gas through piping while braz-

ing to prevent formation of copper oxide.

Install field-supplied thermostatic expansion valve to evap-

orator section. It is recommended that a field-supplied liquid

line solenoid be positioned in the main liquid line close to the

evaporator coil, and wired to close when compressor stops to

minimize refrigerant migration during the ‘‘OFF’’ cycle.

Table 4A — Liquid Line Data — 60 Hz

NOTE: Values shown are for units operating at 45 F (7.2 C) satu-

rated suction and 95 F (35 C) entering air.

Table 4B — Liquid Line Data — 50 Hz

NOTE: Values shown are for units operating at 45 F (7.2 C) satu-

rated suction and 95 F (35 C) entering air.

Step 4 — Make Electrical Connections

FIELD POWER SUPPLY — All units except 208/230-v

units are factory wired for the voltage shown on the nameplate.

If the 208/230-v unit is to be connected to a 208-v power

supply, the transformer must be rewired by moving the black

wire from the 230-v 1/4-in. spade terminal on the transformer

and connecting it to the 200-v 1/4-in. spade terminal from the

transformer.

Refer to unit label diagram for additional information.

Pigtails are provided for field wire connections. Use factory-

supplied splices or UL (Underwriters’ Laboratories) (U.S.A.

Standard) approved copper/aluminum connector.

When installing units, provide a disconnect per NEC. All

field wiring must comply with NEC and local requirements.

Install field wiring as follows:

1. Install conduit through side panel openings.

2. Install power lines to connections as shown in Fig. 5.

Wrap connections with electrical tape.

Voltage to compressor terminals during operation must be

within voltage range indicated on unit nameplate (also see Ta-

ble 5). Voltages between phases must be balanced within 2%

and the current within 10%. Use the formula shown in Table 5,

Note 2, to determine the percent voltage imbalance Operation

on improper line voltage or excessive phase imbalance

constitutes abuse and may cause damage to electrical compo-

nents. Such operation would invalidate any applicable Carrier

warranty.

UNIT

MAX

ALLOWABLE

LIQUID LIFT

LIQUID LINE

Max Allowable

Pressure Drop

Max Allowable

Temp Loss

Ft M psi kPa F C

AK007 86 26.2 7 48.3 2 1

AK008 60 18.3 7 48.3 2 1

AK012 70 21.3 7 48.3 2 1

AKS008 60 18.3 7 48.3 2 1

AKS009 65 19.8 7 48.3 2 1

AKS012 65 19.8 7 48.3 2 1

UNIT

MAX

ALLOWABLE

LIQUID LIFT

LIQUID LINE

Max Allowable

Pressure Drop

Max Allowable

Temp Loss

Ft M psi kPa F C

AK007 76 23.2 7 48.3 2 1

AK008 50 15.2 7 48.3 2 1

AK012 57 17.4 7 48.3 2 1

AKS008 50 15.2 7 48.3 2 1

AKS009 52 15.8 7 48.3 2 1

AKS012 52 15.8 7 48.3 2 1

Unit cabinet must have an uninterrupted, unbroken electri-

cal ground to minimize the possibility of personal injury if

an electrical fault should occur. This ground may consist of

electrical wire connected to unit ground lug in control com-

partment, or conduit approved for electrical ground when

installed in accordance with NEC ANSI (American

National Standards Institute)/NFPA (National Fire Protec-

tion Association) 70 (U.S.A. Standards) and local electrical

codes. Failure to follow this warning could result in the

installer being liable for personal injury of others.

Fig. 4 — Typical Compressor Mounting

(38AKS Units)

208/230-3-60

380-3-60

460-3-60

575-3-60

220-3-50

400-3-50

LEGEND

Fig. 5 — Power Wiring Connections

C—

Contactor

NEC — National Electrical Code

Field Wiring

Factory Wiring

Splice Connection (Factory Supplied)

Table 5 — Electrical Data

LEGEND

NOTES:

1. In compliance with NEC requirements for multimotor and combi-

nation load equipment (refer to NEC Articles 430 and 440), the

overcurrent protective device for the unit shall be fuse or HACR

breaker.

2. Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply volt-

age is greater than 2%. Use the following formula to determine

the percent of voltage imbalance.

Example: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

= 457

Determine maximum deviation from average voltage.

(AB) 457 – 452 = 5 v

(BC) 464 – 457 = 7 v

(AC) 457 – 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

= 1.53%

This amount of phase imbalance is satisfactory as it is below the

maximum allowable 2%.

3. The 575-v units are CSA only.

4. the 380 v, 60 Hz units and all 50 Hz units are not UL or CSA

listed.

UNIT

NOMINAL VOLTAGE

(V-Ph-Hz)

VOLTAGE RANGE COMPRESSOR OFM POWER SUPPLY

MIN MAX RLA LRA FLA MCA MOCP

AK007

208/230-3-60 187 254 21.8 158 1.9 30.1 40

460-3-60 414 508 10.0 79 1.0 13.6 20

575-3-60 518 632 9.0 65 1.9 14.1 20

220-3-50 198 242 21.8 158 1.0 28.8 35

400-3-50 360 440 10.0 79 1.0 14.0 20

AK008

208/230-3-60 187 254 28.8 195 3.8 39.8 50

460-3-60 414 508 14.7 95 1.9 20.3 25

575-3-60 518 632 10.8 80 1.9 15.4 20

220-3-50 198 242 28.8 195 1.5 37.5 45

400-3-50 360 440 14.7 95 1.5 19.9 25

AK012

208/230-3-60 187 254 37.8 239 3.8 39.8 20

460-3-60 414 508 17.2 125 2.2 20.3 30

575-3-60 518 632 14.3 90 1.9 15.4 25

220-3-50 198 242 37.8 239 1.4 48.8 60

400-3-50 360 440 17.2 125 1.4 23.0 30

AKS008

208/230-3-60 187 254 31.5 160 3.1 42.5 50

380-3-60 342 418 19.0 75 2.2 26.0 35

460-3-60 414 508 15.7 80 1.4 21.0 25

575-3-60 518 632 12.6 64 1.4 17.2 20

220-3-50 198 253 31.5 160 1.4 42.5 50

400-3-50 342 460 15.7 80 1.4 21.0 25

AKS009

208/230-3-60 187 254 39.7 198 3.1 52.7 70

380-3-60 342 418 24.0 93 2.2 32.2 40

460-3-60 414 508 19.9 99 1.4 26.3 35

575-3-60 518 632 15.9 79 1.4 21.3 25

220-3-50 198 253 39.7 198 1.4 52.7 70

400-3-50 342 460 19.9 99 1.4 26.3 35

AKS012

208/230-3-60 187 254 39.7 198 3.1 52.7 70

380-3-60 342 418 24.0 93 2.2 32.2 40

460-3-60 414 508 19.9 99 1.4 26.3 35

575-3-60 518 632 15.9 79 1.4 21.3 25

220-3-50 198 253 39.7 198 1.4 52.7 70

400-3-50 342 460 19.9 99 1.4 26.3 35

CSA — Canadian Standards Association

FLA — Full Load Amps

HACR — Heating, Air Conditioning and Refrigeration

LRA — Locked Rotor Amps

MCA — Minimum Circuit Amps

MOCP — Maximum Overcurrent Protection

NEC — National Electrical Code (U.S.A. Standard)

OFM — Outdoor (Condenser) Fan Motor

RLA — Rated Load Amps

UL — Underwriters’ Laboratories

= 100 x max voltage deviation from average voltage

average voltage

Average Voltage = 452 + 464 + 455

= 1371

IMPORTANT: If the supply voltage phase imbalance is

more than 2%, contact your local electric utility company

immediately.

457

FIELD CONTROL WIRING — Install a Carrier-approved

accessory thermostat assembly according to installation

instructions included with the accessory. Locate thermostat

assembly on a solid wall in the conditioned space to sense aver-

age temperature in accordance with thermostat installation

instructions.

Route thermostat cable or equivalent single leads of colored

wire from subbase terminals to low-voltage connections on

unit (shown in Fig. 6) as described in Steps 1 through 3 below.

NOTE: For wire runs, use the following insulated wire:

LEGEND

AWG — American Wire Gage

All wire larger than no. 18 AWG cannot be directly con-

nected to the thermostat and will require a junction box and

splice at the thermostat.

1. Connect thermostat wires to screw terminals of low-

voltage connection board.

2. Pass the control wires through the hole provided in the

corner post. (See Fig. 7.)

3. Feed wire through the raceway built into the corner post

and into the 24 v thermostat connection board. The 24 v

thermostat connection is located on the left side of the

low-voltage connection compartment. The raceway pro-

vides the UL required clearance between high- and low-

voltage wiring.

Total combined amperage drain of the field-installed liquid

line solenoid valve and indoor (evaporator) fan contactor must

not exceed 22 va. If the specified va must be exceeded, use a

remote relay to switch the load.

LENGTH INSULATION

RATING (C)

SIZE

Ft M AWG sq mm

0-50 0-15.2 35 18 0.82

50-75 15.2-22.9 35 16 1.30

Over 75 Over 22.9 35 14 2.08

24-V BARRIER

LOW-VOLTAGE

THERMOSTAT

CONNECTION

BOARD

RACEWAY

CORNER

POST

Fig. 7 — Field Control Wiring Raceway

(38AKS Unit Shown)

Fig. 6 — Typical Control Wiring Connections/Component Arrangement (38AK Shown)

LEGEND

AHA — Adjustable Heat Anticipator

C—Contactor, Compressor

CAP — Capacitor

CB — Circuit Breaker

CC — Cooling Compensator

CLO — Compressor Lockout

COMP — Compressor Motor

HPS — High-Pressure Switch

IFC — Indoor (Evaporator) Fan Contactor

LLSV — Liquid Line Solenoid Valve

LPS — Low-Pressure Switch

NEC — National Electrical Code

OFC — Outdoor-Fan Contactor

OFM — Outdoor-Fan Motor

QT — Quadruple Terminal

TB — Te r m i n a l B l o c k

TRAN — Transformer

Field Splice

Marked Wire

Terminal (Marked)

Terminal (Unmarked)

Te r m i n a l B l o c k

Splice

Factory Wiring

Field Control Wiring

Field Power Wiring

Accessory or Optional Wiring

To indicate common

potential only.

Not to represent wiring.

Ground

START-UP

Preliminary Checks

1. Field electrical power source must agree with unit name-

plate rating.

2. Check that all internal wiring connections are tight and

that all barriers, covers, and panels are in place. Ensure no

electrical wires are in contact with refrigerant tubing.

3. Ensure all service valves are open. On 38AKS units, be

sure all compressor service valves are backseated.

4. Verify that compressor holddown bolts for units 38AKS

have been loosened and that flat/snubber washers can be

rotated by applying finger pressure (snug, but not tight).

5. Verify compressor crankcase heater is securely in place.

Crankcase heater must operate for at least 24 hours before

start-up. The 38AK unit size 007 does not require a

crankcase heater.

6. Note that compressor oil level is visible in the sight glass

(38AKS units only).

7. Check for leaks in refrigerant system by using soap bub-

bles and/or electronic leak detector.

8. Check that liquid line solenoid valve is located at evapo-

rator coil as shown in Filter Drier and Moisture Indicator

section, page 6.

9. Check voltage imbalance as shown in Table 5, Note 2.

10. Check that both outdoor and indoor units are properly

mounted in accordance with installation instructions and

applicable codes.

Compressor Rotation — On 3-phase units with scroll

compressors, it is important to be certain compressor is rotating

in the proper direction. To determine whether or not compres-

sor is rotating in the proper direction:

1. Connect service gages to suction and discharge pressure

fittings.

2. Energize the compressor.

3. The suction pressure should drop and the discharge pres-

sure should rise, as is normal on any start-up.

If the suction pressure does not drop and the discharge

pressure does not rise to normal levels:

1. Note that the condenser fan is probably also rotating in

the wrong direction.

2. Turn off power to the unit, tag disconnect.

3. Reverse any two of the unit power leads.

4. Reapply power to the compressor, verify correct

pressures.

The suction and discharge pressure levels should now move

to their normal start-up levels.

Evacuate and Dehydrate — Evacuate and dehydrate

entire refrigerant system by use of the methods described in

Carrier GTAC II, Module 4, System Dehydration. Evacuate

system down to 500 microns and ensure vacuum hold for

15 minutes. If vacuum does not hold, pressurize system and

locate leak and repair.

Refrigerant Charge — Refer to Carrier GTAC II,

Module 5, Charging Recovery, Recycling, and Reclamation.

Unit panels must be in place when unit is operating during

charging procedure.

Unit is shipped with holding charge only. Weigh in 7 lb

(3 kg) of R-22 to start unit.

CHARGE COOLING — Use Cooling Charging Charts,

Fig. 8A or 8B and 9A or 9B. Unit must be charged in cooling

mode only. Vary refrigerant until the conditions of the chart are

met. Note that charging charts are different from type normally

used. Charts are based on charging the units to the correct sub-

cooling for the various operating conditions. Accurate pressure

gage and temperature sensing device are required. Connect the

pressure gage to the service port on the liquid line service

valve. Mount the temperature sensing device on the liquid line,

close to the liquid line service valve and insulate it so that out-

door ambient temperature does not affect the reading. Indoor

airflow must be within the normal operating range of the unit.

Operate unit a minimum of 15 minutes. Ensure pressure and

temperature readings have stabilized. Plot liquid pressure and

temperature on chart and add or reduce charge to meet curve.

Adjust charge to conform with charging chart, using liquid

pressure and temperature to read chart.

Fig. 8A — Cooling Charging Chart — 38AK007

(60 Hz)

Fig. 8B — Cooling Charging Chart — 38AK007

(50 Hz)

Compressor Overload — This overload interrupts

power to the compressor when either the current or internal

motor winding temperature becomes excessive, and automati-

cally resets when the internal temperature drops to a safe level.

This overload may require up to 60 minutes (or longer) to reset.

If the internal overload is suspected of being open, disconnect

the electrical power to the unit and check the circuit through the

overload with an ohmmeter or continuity tester.

Cycle-LOC™ Device (CLO) — The Cycle-LOC de-

vice prevents the compressor from starting or running in a high

pressure, loss-of-charge or freezestat open situation. Reset the

Cycle-LOC device by setting the thermostat to eliminate cool-

ing demand and return it to the original set point. If the system

shuts down again for the same fault, determine the possible

cause before attempting to reset the Cycle-LOC device.

Low-Pressure/Loss-of-Charge Switch (LPS) —

When the liquid line pressure drops below 7 psig (48 kPa), the

LPS opens 24-v power to the compressor contactor and stops

the compressor. When the pressure reaches 22 psig (152 kPa),

the switch resets and the compressor is allowed to restart.

High-Pressure Switch (HPS) — When the refriger-

ant high-side pressure reaches 426 psig (2937 kPa), the HPS

opens 24-v power to the compressor contactor and stops the

compressor. When the pressure drops to 320 psig (2206 kPa),

the switch resets and the compressor is allowed to restart.

Refrigerant Service Ports — Each unit system has

3 service ports: one on the suction line, one on the liquid line,

and one on the compressor discharge line. Be sure caps on the

ports are tight.

High Flow Valves — Located on the compressor hot gas

and suction tubes are high flow valves. Large black plastic caps

distinguish these valves with O-rings located inside the caps.

These valves cannot be accessed for service in the field. Ensure

the plastic caps are in place and tight or the possibility of refrig-

erant leakage could occur.

Cooling — Set space thermostat to OFF position. Set

system selector switch at COOL position and fan switch at

AUTO. position. Adjust thermostat to a setting below room

temperature. Compressor starts on closure of contactor.

Check cooling effects at a setting below room temperature.

Check unit charge. Refer to Refrigerant Charge section on

page 9.

Reset thermostat at a position above room temperature.

Compressor will shut off.

TO SHUT OFF UNIT — Set system selector switch at OFF

position. (Resetting thermostat at a position above room tem-

perature shuts unit off temporarily until space temperature ex-

ceeds thermostat setting.) Units are equipped with Cycle-

LOC™ protection device. Unit shuts down on any safety trip

and remains off. Check reason for safety trip.

Compressor restart is accomplished by manual reset of the

thermostat by turning the selector switch to OFF position and

then to ON position.

Sequence of Operation — At start-up, the thermostat

calls for cooling. With all safety devices satisfied, the compres-

sor contactor and fan contactor energize, causing the compres-

sor and outdoor (condenser) fan motor to operate. Contacts

close, allowing the field-supplied and -installed indoor (evapo-

rator) fan contactor to function. The recommended field-

supplied and -installed liquid line solenoid valve will also

open, allowing the system to function in cooling. As cooling

demand is satisfied, the thermostat contacts break, deenergiz-

ing the contactor causing the system to shut off. The liquid line

solenoid valve closes, minimizing the potential for refrigerant

migration at this time. The compressor does not restart until the

thermostat again calls for cooling. The system is protected by a

Cycle-LOC device so that the compressor will not start if a

high-pressure or low-pressure fault occurs. Compressor restart

is accomplished by manual reset of the thermostat by turning

the selector switch to OFF position and then to ON position.

This should be done only once. If system shuts down due to the

same fault, determine the problem before attempting to reset

the Cycle-LOC device.

Fig. 9A — Cooling Charging Chart — 38AK008,012

and 38AKS008,009,012 (60 Hz)

Fig. 9B — Cooling Charging Chart — 38AK008,012

and 38AKS008,009,012 (50 Hz)

Oil Charge (Tables 1A and 1B)

38AKS UNITS — Allow unit to run for about 20 minutes.

Stop unit and check compressor oil level. Add oil only if neces-

sary to bring oil into view in sight glass. Use only Carrier-

approved compressor oil.

Approved oils are:

Suniso 3GS

WF32-150

38AK UNITS — The 38AK units do not have a sight glass

and are factory charged with the correct amount of oil.

ALL UNITS — Do not reuse drained oil or use any oil that

has been exposed to atmosphere. Procedures for adding or re-

moving oil are given in Carrier Standard Service Techniques

Manual, Chapter 1, Refrigerants.

If oil is added, run unit for an additional 10 minutes. Stop

unit and check oil level. If level is still low, add oil only after

determining that piping system is designed for proper oil return

and that system is not leaking oil.

SERVICE

Cleaning — Inspect unit interior at the beginning of each

cooling season and as operating conditions require.

CONDENSER COIL — Inspect coil monthly. Clean con-

denser coil annually and as required by location or outdoor-air

conditions.

Clean coil as follows:

1. Turn off unit power and tag disconnect.

2. Remove and save top panel screws on condensing unit.

3. Remove condenser coil corner post. See Fig. 10. To hold

top panel open, place coil corner post between top panel

and side panel. See Fig. 11.

4. Remove bracket holding coil sections together at return

end of condenser coil. Carefully separate the outer coil

section 3 to 4 in. (75 to 100 mm) from the inner coil

section. See Fig. 12.

5. Use a water hose or other suitable equipment to flush

down between the 2 coil sections to remove dirt and

debris. Clean the outer surfaces with a stiff bristled brush

in the normal manner.

6. Reposition the coil section and secure.

7. Remove the coil corner post from between the top panel

and side panel.

8. Install the coil corner post and replace all screws removed

in Step 2.

Lubrication

COMPRESSORS — Each compressor is charged with correct

amount of oil at the factory. For additional information on

38AKS units, refer to the Oil Charge section above.

FAN MOTOR BEARINGS — Fan motor bearings are of the

permanently-lubricated type. No further lubrication is required.

Condenser-Fan Adjustment (Fig. 13)

1. Shut off unit power supply and tag disconnect.

2. Remove condenser-fan assembly (grille, motor, motor

cover, and fan).

3. Loosen fan hub setscrews.

4. Adjust fan height as shown in Fig. 13.

5. Tighten setscrews.

6. Replace condenser-fan assembly.

When servicing unit, shut off all electrical power to the unit

to avoid shock hazard or injury from rotating parts.

Fig. 11 — Propping Up Top Panel

Fig. 12 — Separating Coil Sections

Fig. 10 — Cleaning Condenser Coil

Capacity Control — Unit 38AKS012 Only — A

suction pressure-actuated unloader controls 2 cylinders and

provides capacity control. Unloaders are factory set (see

Table 1A or 1B), but may be field adjusted as follows:

CONTROL SET POINT (cylinder load point) is adjustable

from 0 to 85 psig (586 kPa). To adjust, turn control set point

adjustment nut (Fig. 14) clockwise to its bottom stop. In this

position, set point is 85 psig (586 kPa). Then, turn adjustment

counterclockwise to desired control set point. Every full turn

counterclockwise decreases set point by 7.5 psig (51.7 kPa).

PRESSURE DIFFERENTIAL (difference between cylinder

load and unload points) is adjustable from 6 to 22 psig (41.4 to

152 kPa). To adjust, turn pressure differential adjustment screw

(Fig. 14) counterclockwise to its back stop position. In this

position, differential is 6 psig (41.4 kPa). Then, turn adjust-

ment clockwise to desired pressure differential. Every full turn

clockwise increases differential by 1.5 psig (10.3 kPa).

Compressor Removal — See Tables 1A and 1B for

compressor information. Follow safety codes and wear safety

glasses and work gloves.

1. Shut off power to unit and tag disconnect. Remove unit

access panel (front of unit).

2. Remove refrigerant from system using refrigerant remov-

al methods described in the Carrier GTAC-II, Module 5,

Charging, Recovery, Recycling, and Reclamation.

3. Disconnect compressor wiring at compressor terminal

box.

4. Remove bolts from suction flange and discharge service

valves (38AKS008,009,012 units only). Loosen sweat

connections (38AK007,008, and 012 units only).

5. Remove crankcase heater from compressor base

(38AKS008,009,012, 38AK008,012).

6. Remove compressor holddown bolts.

7. Remove compressor from unit.

8. Clean system. Add new liquid line filter drier.

9. Install new compressor in unit.

10. Connect suction and discharge lines to compressor, as

applicable. Ensure that compressor holddown bolts are in

place.

11. Connect wiring.

12. Install crankcase heater on 38AKS008,009,012 and

38AK008,012 units.

13. Evacuate and recharge unit.

14. Restore unit power.

Crankcase Heater (Except 38AK007) — The crank-

case heater on the 38AK008,012 condensing units prevents

refrigerant migration and compressor oil dilution during shut-

down when compressor is not operating.

Close both compressor service valves if applicable (on

38AKS008,009,012) when crankcase heater is deenergized for

more than 6 hours.

Excessive movement of copper lines at compressor

may cause higher levels of vibration when unit is restored

to service.

Fig. 14 — Compressor Capacity Control Unloader

NOTE: Fan height adjustments are as follows:

Fig. 13 — Condenser-Fan Adjustment

UNIT in. mm

38AK007 (60 Hz)

All 50-Hz Units 4.50 114

All 60-Hz Units

(Except 38AK007) 6.42 163

TROUBLESHOOTING GUIDE

NOTE: See Fig. 15 for component arrangements.

SYMPTOM CAUSE REMEDY

Compressor does not run —

Contactor open

Power off. Restore power.

Fuses blown. Replace with correct fuses after finding cause and correcting.

Transformer open/shorted. Replace transformer if primary windings are receiving power and

no output.

Thermostat circuit open. Check thermostat setting.

Low-pressure switch open. Check for refrigerant undercharge or system leak.

High-pressure switch open. Check for refrigerant overcharge or obstruction of outdoor airflow.

Connections loose. Tighten all connections.

Compressor motor thermostat open. Check for excessive motor temperature.

Compressor does not run —

Contactor closed

Compressor leads loose, broken. Check connections with power off.

Single phasing. Replace blown fuse.

Compressor internal overload open. Allow compressor motor windings to cool down to reset overload.

Determine cause for overload opening.

Compressor cycles on high-

pressure switch —

Condenser fan on

High-pressure switch faulty. Replace switch.

Airflow restricted. Dirty coil. Remove obstruction, clean condenser coil.

Air recirculating. Clear airflow area.

Noncondensables in system. Recover, evacuate and recharge as required. Refer to Carrier

GTAC-II, Module 5, Charging, Recovery, Recycling, and

Reclamation.

Refrigerant overcharge. Recover as required.

Refrigerant system restrictions. Check or replace filter drier, expansion valve, etc.

Compressor cycles on high-

pressure switch —

Condenser fan off

Fan slips on shaft. Tighten fan hub screws.

Motor not running. Check power and capacitor 1/3 and 3/4 hp motor.

Motor bearings seized. Replace motor.

Motor overload open. Check overload rating. Check for fan blade obstruction.

Motor burned out, windings open. Replace motor.

Compressor cycles on low-

pressure switch —

Evaporator fan running

Filter drier plugged. Replace filter drier.

Expansion valve power head

defective.

Replace power head.

Low refrigerant charge. Find leak, repair, evacuate system, and recharge.

Expansion valve restricted/plugged. Remove and replace expansion valve.

Airflow restricted —

Low suction pressure

Evaporator coil iced up. Check refrigerant charge.

Evaporator coil dirty. Clean coil fins.

Indoor-air filter dirty. Clean or replace filters.

Indoor-air dampers closed. Check damper operation and position.

Indoor (evaporator) fan stopped —

Low suction pressure

Electrical connections loose. Tighten all connections.

Fan relay defective. Replace relay.

Motor overload open. Check power supply.

Motor defective. Replace motor.

Fan belt broken or slipping. Replace or tighten belt.

Compressor runs but cooling

insufficient —

Suction pressure low

Refrigerant charge low. Add charge.

Head pressure low. Check refrigerant charge.

Indoor-air filters dirty. Clean or replace filters.

Expansion valve power head

defective.

Replace power head.

Expansion valve restricted/plugged. Remove and replace expansion valve.

Evaporator coil partially iced. Check low-pressure setting.

Evaporator airflow restricted. Remove obstruction.

Compressor runs but cooling

insufficient —

Suction pressure high

Heat load excessive. Check for open doors or windows.

Reverse rotation. Check compressor rotation (see page 9).

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

PC 111 Catalog No. 533-80003 Printed in U.S.A. Form 38A-9SI Pg 14 5-01 Replaces: 38A-8SI

Book 1 4

Ta b 3 a 2 a

C—

Contactor, Compressor

CAP — Capacitor

CB — Circuit Breaker

CLO — Compressor Lockout

COMP — Compressor Motor

EQUIP — Equipment

GND — Ground

NEC — National Electrical Code

OFC — Outdoor-Fan Contactor

OFM — Outdoor-Fan Motor

QT — Quadruple Terminal

TB — Terminal Block

LEGEND

TRAN — Transformer

Terminal (Marked)

Terminal (Unmarked)

Terminal Block

Factory Wiring

Field Power Wiring

Accessory or Optional Wiring

Fig. 15 — Typical Component Arrangement

START-UP CHECKLIST

I. Preliminary Information

OUTDOOR: MODEL NO. _______________________________ SERIAL NO. ____________________________________

INDOOR: AIR HANDLER MANUFACTURER __________________________________________________________________

MODEL NO.__________________________________ SERIAL NO. ____________________________________

ADDITIONAL ACCESSORIES ______________________________________________________________________________

II. Pre-Start-Up

OUTDOOR UNIT

IS THERE ANY SHIPPING DAMAGE? _______________ (Y/N) __________

IF SO, WHERE: __________________________________________________________________________________________

_______________________________________________________________________________________________________

WILL THIS DAMAGE PREVENT UNIT START-UP? (Y/N) _________

CHECK POWER SUPPLY. DOES IT AGREE WITH UNIT? (Y/N) _________

HAS THE GROUND WIRE CIRCUIT BEEN CONNECTED PER NEC GUIDELINES? (Y/N) _______

HAS THE CIRCUIT PROTECTION BEEN SIZED AND INSTALLED PROPERLY? (Y/N) __________

ARE THE POWER WIRES TO THE UNIT SIZED AND INSTALLED PROPERLY? (Y/N) __________

38AKS Only: HAVE COMPRESSOR HOLDDOWN BOLTS BEEN LOOSENED (Snubber washers are snug, but not tight)?

(Y/N) _________

HAS COMPRESSOR ROTATION BEEN VERIFIED (Is compressor rotating in correct direction?) (Y/N) _______

CONTROLS

ARE THERMOSTAT AND INDOOR-FAN CONTROL WIRING CONNECTIONS MADE AND CHECKED? (Y/N) _____

ARE ALL WIRING TERMINALS (including main power supply) TIGHT? (Y/N) ______

HAS CRANKCASE HEATER BEEN ENERGIZED FOR 24 HOURS? (Y/N) ______

INDOOR UNIT

HAS WATER BEEN PLACED IN DRAIN PAN TO CONFIRM PROPER DRAINAGE? (Y/N) ________

ARE PROPER AIR FILTERS IN PLACE? (Y/N) __________

HAVE FAN AND MOTOR PULLEYS BEEN CHECKED FOR PROPER ALIGNMENT? (Y/N) _______

DO THE FAN BELTS HAVE PROPER TENSION? (Y/N) _________

HAS CORRECT FAN ROTATION BEEN CONFIRMED? (Y/N) ________

PIPING

IS LIQUID LINE SOLENOID VALVE LOCATED AT THE EVAPORATOR COIL AS REQUIRED? (Y/N) ______

HAVE LEAK CHECKS BEEN MADE AT COMPRESSOR, CONDENSER, EVAPORATOR, TXVs (Thermostatic Expansion Valves)

SOLENOID VALVES, FILTER DRIERS, AND FUSIBLE PLUGS WITH A LEAK DETECTOR? (Y/N) _______

LOCATE, REPAIR, AND REPORT ANY LEAKS. ________________________________________________________________

ON 38AKS UNIT, HAVE ALL COMPRESSOR SERVICE VALVES BEEN FULLY OPENED (BACKSEATED)? (Y/N) _______

HAVE LIQUID LINE SERVICE VALVE AND SUCTION LINE SERVICE VALVE BEEN OPENED? (Y/N) ______

IS THE OIL LEVEL IN THE COMPRESSOR CRANKCASE ON THE 38AKS UNIT IN VIEW IN THE COMPRESSOR

SIGHT GLASS? (Y/N) __________

CL-1

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

PC 111 Catalog No. 533-80003 Printed in U.S.A. Form 38A-9SI Pg CL-2 5-01 Replaces: 38A-8SI

Book 1 4

Ta b 3 a 2 a

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - -

CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE

CHECK VOLTAGE IMBALANCE

LINE-TO-LINE VOLTS: AB________ V AC________ V BC ________ V

(AB + AC + BC)/3 = AVERAGE VOLTAGE = _________ V

MAXIMUM DEVIATION FROM AVERAGE VOLTAGE = _________V

VOLTAGE IMBALANCE = 100 X (MAX DEVIATION)/(AVERAGE VOLTAGE) = _________ %

IF OVER 2% VOLTAGE IMBALANCE, DO NOT ATTEMPT TO START SYSTEM!

CALL LOCAL POWER COMPANY FOR ASSISTANCE.

III. Start-Up

CHECK INDOOR (EVAPORATOR) FAN SPEED AND RECORD. ___________

CHECK OUTDOOR (CONDENSER) FAN SPEED AND RECORD. _____________

AFTER AT LEAST 15 MINUTES RUNNING TIME, RECORD THE FOLLOWING MEASUREMENTS:

OIL PRESSURE (38AKS only) ___________

SUCTION PRESSURE ___________ Psig (kPa)

SUCTION LINE TEMP ___________ °F (°C)

DISCHARGE PRESSURE ___________ Psig (kPa)

DISCHARGE LINE TEMP ___________ °F (°C)

ENTERING CONDENSER-AIR TEMP ___________ DB

LEAVING CONDENSER-AIR TEMP ___________ DB

EVAP ENTERING-AIR DB (dry bulb) TEMP ___________

EVAP ENTERING-AIR WB (wet bulb) TEMP ___________

EVAP LEAVING-AIR DB TEMP ___________

EVAP LEAVING-AIR WB TEMP ___________

COMPRESSOR AMPS (L1/L2/L3) ______ / ______ / _______

HAS REFRIGERANT CHARGE BEEN ADJUSTED PER CHARGING CHARGE? __________

NOTES:

_______________________________________________________________________________________________________

Carrier 38Ak008 Users Manual

38aks012 9f191b9d-cc5c-4991-b28a-3972dd6fe241 Carrier Clothes Dryer 38AKS012 User Guide |

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