Carrier 30GX080-176 用户手册

Installation Instructions

Part Nos. 30HX-900---008, 30GX-900---004

(60 Hz — 115-v Control)

Part Nos. 30HX-900---009, 30GX-900---005

(50 or 60 Hz — 230-v Control)

CONTENTS

Page

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . . 1

INTRODUCTION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

Step 1 — Examine Package Contents

. . . . . . . . . 1

Step 2 — Install Piping

. . . . . . . . . . . . . . . . . . . . . . . 2

• REMOVE MINIMUM LOAD PORT PLUGS AND

INSTALL FITTINGS

• INSTALL PIPING
• INSTALL BALL AND SOLENOID VALVES
• CONNECT PIPING

Step 3 — Dehydrate and Recharge Circuit

. . . . . 3

Step 4 — Install Control Wiring

. . . . . . . . . . . . . . . 4

• 30HX UNITS
• 30GX UNITS
• ALL UNITS

Step 5 — Configure Unit for Minimum

Load Control

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Step 6 — Test Minimum Load Relay

Outputs

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Step 7 — Adjust Setting of Minimum Load

Ball Valve

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

SAFETY CONSIDERATIONS

Installing, starting up, and servicing air-conditioning equip-

ment can be hazardous due to system pressures, electrical
components, and equipment location.

Only trained, qualified installers and service technicians

should install, start up, and service this equipment.

When working on air-conditioning equipment, observe pre-

cautions in the literature and on tags, stickers, and labels at-
tached to the equipment.

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

Use care in handling equipment.

Be sure power to equipment is shut off before perform-
ing maintenance or service.

IMPORTANT: When removing refrigerant, use an
approved refrigerant recovery device. Do not vent re-
frigerant into the atmosphere.

INTRODUCTION

The minimum load control accessory allows 30HX and

30GX chillers to have their capacities decreased below the
standard fully unloaded condition. The accessory provides
more precise control of leaving fluid temperature during light
load conditions.

The 30GX and 30HX chillers have a dual-circuit design.

Each minimum load control accessory package contains the
items required for both circuits. Because of an automatic lead/
lag feature on the chillers, the accessory should be installed
on both circuits.

INSTALLATION

Step 1 — Examine Package Contents —

Pack-

age includes solenoid valves, ball valves, Swagelok

t con-

nectors, and instructions. The kit for 30GX units also con-
tains a junction box, junction box cover, and conduit. Examine
each item. If any part is damaged or missing, file a claim
immediately with the shipper. See Table 1 for accessory pack-
age contents and field-supplied material.

Table 1 — Accessory Package Contents and Field-Supplied Material

ACCESSORY PACKAGE

COMPONENTS

ACCESSORY PART NUMBER

30HX-900---008

30HX-900---009

30GX-900---004

30GX-900---005

Solenoid Valve

(2) EF23JX212

(2) EF23JX231

(2) EF23JX212

(2) EF23JX231

Ball Valve

(2) EP71BA201

Swagelok Connector

(4) DC09CA307

(2) DC09CA307

Junction Box

—

HX30FZ001

Junction Box Cover

—

HX38ZZ001

Watertight Conduit

—

99CD2121AC028

FIELD SUPPLIED MATERIAL — REQUIRED PARTS (Ordered Separately)

⁄

-in. OD Copper Tubing, Wiring, Conduit,

Thread Sealant, Electrical Supplies

Field Supplied

30GX080-176

30HX076-271

Minimum Load Control Accessory

50/60 Hz

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

Book 2
Tab

PC 903

Catalog No. 563-056

Printed in U.S.A.

Form 30GX,HX-2SI

Pg 1

1-97

Replaces: New