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INSTALLATION
MANUAL
CONTENTS
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . 4
AGENCY APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
NOTES, CAUTIONS AND WARNINGS
Installer should pay particular attention to the words:
NOTE, CAUTION, and WARNING. Notes are intended to
clarify or make the installation easier. Cautions are given
to prevent equipment damage. Warnings are given to
alert installer that personal injury and/or equipment dam-
age may result if installation procedure is not handled
properly.
CAUTION:
READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
(AIR COOLED)
SPLIT-SYSTEM
AIR CONDITIONER
MODEL: LA120
035-18525-001-B-0203
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Table of Contents
Related Manuals for Unitary products group LA120
Summary of Contents for Unitary products group LA120
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Page 1: Air Cooled
INSTALLATION ....... 6 MAINTENANCE ....... 16 MODEL: LA120 NOTES, CAUTIONS AND WARNINGS Installer should pay particular attention to the words: NOTE, CAUTION, and WARNING. -
Page 2: Table Of Contents
ACCESSORIES ....... 15 LA120 UNIT SUSPENSION WEIGHTS (LBS) ..7 MAINTENANCE . -
Page 3: Nomenclature
Factory Options B = Disconnect AA = None Special Options AC = Technicoat Coil Generation 1 = 1 Generation 2 = 2 Generation Style A = Style A B = Style B *NOT AVAILABLE IN HEAT PUMP Unitary Products Group... -
Page 4: General
If damage is evident, assistance or additional information, consult a the extent of damage should be noted on the carrier's qualified installer, service agency. freight bill. A separate request for inspection by the carrier's agent should be made in writing. Unitary Products Group... -
Page 5: Physical Data
TABLE 2: APPLICATION LIMITATIONS Entering Air Temperatures, ºF Voltage Supply Air Range Power Variation Cooling-db/wb Heating-db Supply Min. Max. Min. Max. Min. Max. Min. Max. 208/230-3-60 2800 6800 65/67 96/72 460-3-60 Utilization Range”A” in accordance with ARI Standard 110. Unitary Products Group... -
Page 6: Installation
Before rigging any unit, determine its weight from Table 1 . Before rigging a unit for horizontal installa- tion, make sure that its weight will be distributed equally. Unitary Products Group... -
Page 7: Clearances
VERTICAL / HORIZONTAL INSTALLATION the machine bolts removed in Step 2. The LA120 unit is shipped for vertical installation with a 5. Before replacing the panel, see Duct Connection vertical air discharge as shown in Figure 2, but may be and Drain Connection. -
Page 8: Vertical / Horizontal Installation
. FIGURE 3: SUPPLY AIR PLENUM ACCESSORY FIGURE 4: BASE ACCESSORY (VERTICAL ONLY) Unitary Products Group... -
Page 9: Drain Connection
The trap must be at least supplied with the evaporator blowers. They 2" deep to maintain a water seal under all operating are supplied with the matching YORK con- conditions, especially during blower start up. densing sections. Unitary Products Group... -
Page 10: Power And Control Wiring
(leads L1 and L2) at contactor to obtain the National Electrical Code (NFPA standard No. 70) and/ correct rotation. TABLE 5: ELECTRICAL DATA Blower Motor HP Power Supply Maximum Fuse Size Amps Maximum Wire Length Ft. 208-3-60 49.0 230-3-60 55.0 460-3060 27.0 Unitary Products Group... -
Page 11: Supply Air Blower Adjustment
Note - Never loosen the tow nuts (C). Two hex nuts (A) have to be loosened to move the mounting plate and retighten after the mounting plate has been moved to the proper posi- tion. Unitary Products Group... -
Page 12: Field Wiring Diagrams For Power Supply
After readings have been obtained, remove the tubes and seal up the drilled holes in the side panel. 5/16" dot plugs (P/N 029-12880) are available through nor- mal York parts ordering procedures. Unitary Products Group... -
Page 13: Typical Motor Mounting Assembly
549-716 3.1-4.1 56.3 Motor Specifications • 1750 RPM • 56 Frame • 208/230/460-3-60 • Inherently Protected • Solid Base • Permanently lubricated ball bearings FIGURE 11: PRESSURE DROP ACROSS A DRY EVAPORATOR COIL VS. SUPPLY AIR CFM Unitary Products Group... -
Page 14: Pressure Drop Across A Dry Evaporator Coil Vs. Supply Air Cfm
2 Motors can be selected to operate into their service factor because they are located in the moving air stream, upstream of any heating device. Units with steam or hot water coils are the only exception. Unitary Products Group... -
Page 15: Accessories
FIGURE 13: UNIT DIMENSIONS AND CLEARANCES ACCESSORIES • SUPPLY AIR PLENUM Add 27” to unit height when used. • ELECTRIC HEATER • BASE Add 15” to unit height when using 10, 16, 26, or 36 KW heater Unitary Products Group... -
Page 16: Maintenance
DRAIN PAN The drain pan should be inspected regularly to assure MINIMUM CLEARANCES proper drainage. Side Air with RETURN AIR opening 24” 24” Side with SUPPLY AIR opening LUBRICATION 61” Side with PIPING CONNECTIONS 26” Side opposite PIPING CONNECTIONS The bearings for the blower shaft and the blower Bottom motors are permanently lubricated and should not Overall dimension of the unit will vary if an electric heater, a...
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