Assessments - 3, GPA: 4.3
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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 equipment 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 precautions 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 refrigerant 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 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 — Package 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 PART NUMBER ACCESSORY PACKAGE 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) 5/8-in. OD Copper Tubing, Wiring, Conduit, Field Supplied Thread Sealant, Electrical Supplies Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. PC 903 Catalog No. 533-00009 Printed in U.S.A. Form 30GX,HX-14SI Pg 1 102 7-00 Replaces: 30GX,HX-7SI Book Tab 5c Step 2 — Install Piping Shut off all power to the unit, then lock out and safety-tag all disconnects before proceeding with installation. Remove refrigerant charge from circuits using an ap proved refrigerant recovery device before proceeding with installation. NOTE: The units have 2 circuits. Perform all of the following piping installation procedures on both A and B circuits. REMOVE MINIMUM LOAD PORT PLUGS AND INSTALL FITTINGS — Plugs must be removed from these ports and replaced with O-ring seal fittings. Note that plugs were factory-installed with Loctitet 554 or equivalent refrigerant-compatible sealant. Fittings should be installed with similar sealant on threads. 30GXN,R — Cut plug end off of minimum load port braze nipple on discharge line, located between oil separator and condenser. Remove plug from minimum load port on cooler shell. See Fig. 1. Using thread sealant, install O-ring seal fitting in minimum load port on cooler. Port on nipple in discharge line is reserved for a brazed connection. 30HX — Remove plugs from minimum load ports on the cooler shell and the condenser shell (30HXC) or oil separator (30HXA). See Fig. 2. Using thread sealant, install O-ring seal fittings in minimum load ports. INSTALL PIPING — On 30GXN,R units, carefully thread the cooler tube assemblies (P/N 30GX503487) on the O-ring seal fittings installed in the cooler port. Do not tighten. Install field- supplied 5/8-in. OD copper tubing between the tube assembly and the br...
Este manual também é adequado para os modelos :Frigoríficos - 30GXN (1.18 mb)