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. . . . . . . . . . . . . . . . . . . . 1 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16 Cooler and Economizer Removal. . . . . . . . . . . . . . . . . 4 Remote Cooler and Economizer Installation. . . . . 10 SAFETY CONSIDERATIONS Installing, starting up, and servicing air-conditioningequipment can be hazardous due to system pressures, electricalcomponents, and equipment location. Only trained, qualifiedinstallers and service technicians should install, start-up, andservice this equipment. When working on air-conditioning equipment, observeprecautions in the literature and on tags, stickers, and labelsattached to the equipment. Follow all safety codes. Wear safetyglasses and work gloves. Use care in handling equipment. Be sure power to equipment is shut off before performing maintenance or service. Lock out and safety-tag all disconnects. GENERAL The remote cooler accessory allows for the indoor relocation of the cooler on 30XA080-350 units as another means of freeze protection. When the cooler is located in a heated space, an anti-freeze solution is not needed and the performancedegradation associated with antifreeze solution can be avoided. Maximum separation of the 30XA base unit and cooler islimited to 50 lineal ft (15.25 m) or 75 equivalent ft (22 m) ofpiping. For more information, refer to the Carrier Piping Design manual. The liquid and economizer lines between the exterior- installed unit and the remote, interior-installed cooler must have pressure relief devices installed in accordance withASHRAE 15 (American Society of Heating, Refrigeration, andAir Conditioning Engineers) and local codes. Units to be modified for a remote cooler application musthave the following options: • Factory-installed suction service valve option. • Condenser coil type: — Aluminum fin and copper tube — Pre-coat aluminum fin and copper tube — E-coat aluminum fin and copper tube — Copper fin and copper tube — E-coat copper fin and copper tube NOTE: The microchannel heat exchanger option can NOT usethe remote cooler accessory. The application is limited to the following constraints: • Operating chilled water temperature is between 40 and 55 F (4.4 and 12.8 C). When the remote cooler is applied, thecooler heaters will not function, so it is critical to maintain the water temperature above the freezing point at all times. If thewater temperature falls below the freezing point, the coolerdoes not have protection to keep the water from freezing. • The interior space temperature where the cooler will beinstalled must be maintained at a minimum of 50 F (10 C). • Underground refrigerant piping is NOT permitted for thisapplication. See Table 1 for accessory package usage and see Table 2 foraccessory package contents. In addition to the parts suppliedwith each accessory package, the following material must befield-supplied: • Refrigerant grade liquid and suction line copper piping for30XA080-120: circuits A and B and 30XA140-160: circuit B (length determined by installation). See Tables 3A and 3Bfor pipe sizes. • Schedule 40 steel pipe for 30XA140-160: circuit A and30XA180-350: circuits A and B (length determined byinstallation). See Tables 3A and 3B for pipe sizes. • 350 psig pressure relief valves and fittings (2 per circuit) • Suction line tubing insulation (length determined byinstallation) • Economizer line tubing insulation (length determined byinstallation) • 1/2 in. strain relief (2) • Conduit (length determined by installation) • ASME (American Society of Mechanical Engineers) B16.9stub end (4 in. [102 mm]), Schedule 40 Steel (one neededfor 30XA140-160, two needed for 30XA180-350) • ASME B16.5 Class 600 pipe flange (4 in. [102 mm]) withfield-modified extra mounting hole (one needed for30XA260-300, two needed for 325, 350) • Flange mounting hardware • Extra flange gaskets (if necessary) The 30XA units use R-134a refrigerant. No other refrigerant may be used in this system. Suction tubing design pressure is 220 psig (1517 kPa). Economizer and liquid tubingdesign pressure is 350 psig (2413 kPa). Failure to use gageset, hoses, and recovery systems designed to handleR-134a refrigerant may result in personal injury and equipment damage. If unsure about equipment, consult the equipment manufacturer. Table 1 — Accessory Package Usage 30XA UNIT SIZE PACKAGE REQUIRED 080-200 00EFN900003000A 220-350 00EFN900003100A Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53300012-01 Printed in U.S.A. Form 30XA-7SI Pg 1 1-07 Replaces: New Book Tab 5c Table 2 — Accessory Package Contents ACCESSORY PACKAGE PART NO. ITEM NO. DESCRIPTION PART NO. QTY 00EFN900003000A 1 Economizer shutoff valve - 11/8 in. (29 mm) 00PPG000023501A 2 2 Liquid line shutoff valve - 13/8 in. (35 mm) EP71BA393 2 3 5 Wire jacketed cable RM02EJ20...