Carrier 38APD025-130- User Manual

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

Catalog No. 04-53380009-01

Printed in U.S.A.

Form 38AP-5SI

Pg 1

5-10

Replaces: New

Installation Instructions

Part No.: 38AP-900---011, 38AP-900---012, 38AP-900---013

SAFETY CONSIDERATIONS

When installing this accessory, observe precautions in the

literature and on any labels attached to the equipment, and all

other safety precautions that may apply.
• Follow all safety codes.

• Wear safety glasses and work gloves.

• Use care in handling and installing this accessory.

INTRODUCTION

An accessory long line check valve must be installed for:

1. Any 025-030 size dual circuit unit where the evapora-

tor is located higher than the condensing unit and the

linear line length exceeds 55 ft (16.8 m).

2. Any size dual or single circuit unit with linear line

length of 100 ft (30.5 m) or more.

The kit consists of a liquid line check valve and a bypass

check valve to prevent charge migration to compressor.

INSTALLATION

The long line check valve accessory must be mounted in the

liquid line near the condensing unit. The valve is brazed into

the liquid line. Fitting adapters may be required to connect the

check valve to the liquid line. The valve may be mounted in

any orientation, horizontally or vertically. See Fig. 1 for dimen-

sions. Figure 2 shows the location of the check valves on a

rooftop installation. Figure 3 shows the location of the check

valves on a ground level installation.

ACCESSORY USAGE

WARNING

To avoid the possibility of electrical shock, open and tag all

disconnects before installing this equipment. Failure to do

so could result in severe personal injury.

CAUTION

For all units with liquid lines of 100 ft (30.5 m) or more or

any 025-030 size dual circuit unit application where evapo-

rator is located higher than the condensing unit and liquid

lines exceed 55 feet (16.8 m), a long line check valve must

be installed to prevent compressor failure. The long line

check valve accessory must be mounted in the liquid line

as close as possible to the condensing unit.

UNIT

SIZE

CIRCUIT

TYPE

CHECK

VALVE SIZE

(in. ODF)

ACCESSORY USAGE (QUANTITY) — PART NO. 38AP-900---

011

012

013

38APD/S025

Dual

5/8 + 5/8

2

—

—

Single

5/8

1

—

—

38APD/S027

Dual

5/8 + 5/8

2

—

—

Single

5/8

1

—

—

38APD/S030

Dual

5/8 + 5/8

2

—

—

Single

7/8

—

1

—

38APD/S040

Dual

5/8 + 5/8

2

—

—

Single

7/8

—

1

—

38APD/S050

Dual

5/8 + 5/8

2

—

—

Single

7/8

—

1

—

38APD060

Dual

5/8 + 7/8

1

1

—

38APS065

Single

7/8

—

1

—

38APD070

Dual

7/8 + 7/8

—

2

—

38APD080

Dual

7/8 + 7/8

—

2

—

38APD090

Dual

7/8 + 7/8

—

2

—

38APD100

Dual

7/8 + 7/8

—

2

—

38APD115

Dual

7/8 + 7/8

—

2

—

38APD130

Dual

7/8 + 1 1/8

—

1

1

38APS025-065

38APD025-130

Long Line Check Valve Accessory

50/60 Hz