Carrier 30GXN, R080-528 installation instructions Installation Instructions

30GXN,R080-528 30HX076-271 Minimum Load Control Accessory 50/60 Hz

Installation Instructions

Part No. 30GX-900---048,

(60 Hz — 115-v Control)

Part No. 30GX-900---049

(50 or 60 Hz — 230-v Control)

CONTENTS

Page

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

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

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

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

•30GXN,R UNITS ONLY

Step 3 — Dehydrate and Recharge Circuit. . . . . . . . 3 Step 4 — Install Control Wiring. . . . . . . . . . . . . . . . . . . 3

•30HX UNITS

•30GXN,R UNITS

•ALL UNITS

Step 5 — Configure Unit for Minimum

Load Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Step 6 —Test Minimum Load Relay

Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Step 7 — Adjust Setting of Minimum

Load Ball Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

SAFETY CONSIDERATIONS

Installing, starting up, and servicing air-conditioning equip- ment can be hazardous due to system pressures, electrical com- ponents, 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 attached 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 performing maintenance or service.

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

INTRODUCTION

The minimum load control accessory allows 30HX and 30GXN,R 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 30GXN,R and 30HX chillers have a dual-circuit design. Each minimum load control accessory package con- tains the items required for both circuits. Because of an auto- matic 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, O-ring seal fittings, and instructions. Examine each item. If any part is damaged or missing, file a claim immediately with the shipper and notify your Carrier representative. See Table 1 for accessory package contents and field-supplied material.

Table 1 — Accessory Package Contents

and Field-Supplied Material

ACCESSORY PACKAGE		ACCESSORY PART NUMBER
COMPONENTS	30GX-900---048			30GX-900---049
Solenoid Valve	(2)	EF23JX212	(2)		EF23JX231
Ball Valve	(2)	EP71BA201	(2)		EP71BA201
O-Ring Seal Fitting	(4)	30GX503492	(4)		30GX503492
Tube Assembly	(2)	30GX503487	(2)		30GX503457
Tube Assembly (Condenser	(2)	30HX402343	(2)		30HX402343
Oil Separator)
FIELD SUPPLIED MATERIAL — REQUIRED PARTS
(Ordered Separately)
5/ -in. OD Copper Tubing, Wiring, Conduit,					Field Supplied
8
Thread Sealant, Electrical Supplies

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

Book	2	PC 903	Catalog No. 533-00009	Printed in U.S.A.	Form 30GX,HX-14SI	Pg 1	102	7-00	Replaces: 30GX,HX-7SI
Tab	5c