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Do not use steam in hot water coils. Do not operate the supply air blower above its nominal HP rating when a unit is equipped with a steam coil accessory. Although these coils are suitable for a much higher pressure, steam above 25 psig provides too much heat that could damage the blower motor. 1. These units are equipped from the factory with a correctly sized motor starter; overload elements are not factory supplied. Note: Three elements required per unit. Unitary Products Group 036-21335-002-A-1102 TABLE 8: HOT WATER COIL CAPACITIES1 UNIT MODEL HOT WATER COIL MODEL GPM CFM ENTERING WATER TEMPERATURE MINUS ENTRY AIR TEMPERATURE °F. 70 90 110 130 150 LA300 1HW0406 50 6,000 204 263 325 384 443 8,000 236 304 372 440 508 10,000 265 341 416 492 568 12,000 291 374 457 540 623 LB360 50 8,000 236 304 372 440 508 10,000 265 341 416 492 568 12,000 291 374 457 540 623 14,000 315 405 495 585 675 LB480 1HW0407 75 12,800 348 447 547 646 746 16,000 389 500 611 722 833 19,200 425 547 668 790 911 LB600 75 16,000 389 500 611 722 833 20,000 436 561 686 810 935 24,000 473 610 746 882 1,019 1. These capacities do not include any blower motor heat. NOTE: Temperature Water Drop (.F) = (2 X MBH) / GPM. TABLE 9: HOT WATER COIL CAPACITY CORRECTION AND PRESSURE DROP VS GPM1 HOT WATER COIL MODEL GPM PRESSURE DROP PSI CAPACITY CORRECTION FACTOR 25 0.4 0.79 1HW0406 50 1.0 1.00 75 1.8 1.04 100 3.4 1.07 50 1.0 0.95 1HW0407 75 1.5 1.00 100 2.4 1.03 125 3.5 1.05 1. For pressure drop in feet (water), multiply these values by 2.31. Unitary Products Group 036-21335-002-A-1102 TABLE 10: STEAM COIL CAPACITIES1,MBH@2 PSIG2 UNIT MODEL STEAM COIL MODEL CFM DRY BULB TEMPERATURE OF AIR ENTERING COIL (°F) 10 30 50 70 LA300 1NF0454 6,000 471 424 380 330 8,000 535 483 432 380 10,000 592 535 478 422 12,000 642 580 518 456 LB360 8,000 535 483 432 380 10,000 592 535 478 422 12,000 642 580 518 456 14,000 687 621 555 489 1. These capacities do not include any blower motor heat. 2. Multiply these capacities by the factors in Table 11 to correct for higher steam pressure. TABLE 11: CORRECTION FACTORS FOR HIGH STEAM STEAM PRESSURE (PSIG) 5 10 15 20 25 CAPACITY CORRECTION FACTOR 1.05 1.12 1.19 1.25 1.30 NOTE: Steam Rate = (lbs/Hr.) = 1.025 x MBH Unitary Products Group 036-21335-002-A-1102 Unitary Products Group 11 FIGURE 5: UNIT DIMENSIONS - LA300, LB360 & LB480 AIR OUT AIR OUT AIR IN AIR IN 5/8 5/8 5/8 PANEL 5/8 BOTTOM PANEL 7/8 KNOCKOUTS FOR POWER AND CONTROL WIRING M C A B EVAPORATOR COIL SECTION D D D E LESS BOTTOM PANEL { BLOWER SECTION J L K K See detailed drawings for piping and drain connections on following pages. EVAPORATOR SECTION TABLE 12: UNIT DIMENSIONS - LA300, LB360, LB480 MODEL A B C D E F G H J K L M LA300 100-1/8 95-5/8 33-1/4 36-5/8 74 2-1/2 18-7/8 16-1/2 15-13/16 21-7/8 18 22-9/16 LB360 100-1/8 95-5/8 33-1/4 36-5/8 74 2-1/2 18-7/8 16-1/2 15-13/16 21-7/8 18 22-9/16 LB480 103-1/8 95-5/8 40-5/8 44 88-5/8 2-1/2 18-7/8 23-7/8 20-11/16 21-7/8 18 22-11/16 FIGURE 6: 25 TON LIQUID LINE SOLENOID WIRING FIGURE 7: 30, 40 & 50 TON LIQUID LINE SOLENOID WIRING 036-21335-002-A-1102 SUCTION LIQUID FIGURE 8: LA300 PIPING CONNECTIONS LIQUID SYS. #1 LIQUID SYS. #2 SYS. #1 SYS. # 2 SUCTION FIGURE 10: LB480 PIPING CONNECTIONS TABLE 13: UNIT CONNECTION SIZES LIQUID (SYS. #1) LIQUID (SYS. #2) SUCTION (SYS. #2) SUCTION (SYS. #1) Connection Size Connection Entry LA300 LB360 LB480 LB600 + M2CX600 Suction Line Sys # 1 2 1/8 1-1/8 1-3/8 2-1/8 Suction Line Sys # 2 N/A 1-1/8 1-3/8 2-1/8 Liquid Line Sys # 1 7/8 7/8 7/8 7/8 Liquid Line Sys # 2 N/A 7/8 7/8 7/8 Power Wiring 7/8 (2) 7/8 (2) 7/8 (2) 1-3/8 Control Wiring 7/8 (2) 7/8 (2) 7/8 (2) 7/8 (2) FIGURE 9: LB360 PIPING CONNECTIONS Unitary Products Group 036-21335-002-A-1102 FIGURE 11: UNIT DIMENSIONS -LB600 6.7" 13.5" 6.0"2.1" 3.0" 10.1" 23.86" 3.0" 3.8"Liquid Line Sys. #2 4.0" 24.0" 13.5" 4.7" Liquid Line Sys. #1 Condensate Drain Suction Line Sys. #1 Suction Line Sys. #2 FIGURE 12: LB600 PIPING CONNECTIONS -END PANEL DETAIL Unitary Products Group 036-21335-002-A-1102 FIGURE 13: HOT WATER COIL DIMENSIONS TABLE 14: HOT WATER COIL DIMENSIONS COIL MODEL UNIT MODEL DIMENSIONS A B C D E F 1HW0406 LA300 LB360 100-1/8 37-7/8 6-3/4 3-7/8 1-3/8 1-3/8 1HW0407 LB480 LB600 103-1/8 45-1/4 6-1/2 4 1-5/8 1-5/8 FIGURE 14: STEAM COIL DIMENSIONS TABLE 15: STEAM COIL DIMENSIONS1 COIL UNIT DIMENSIONS MODEL MODEL A B C D E F G 1NF0454 LA300 LB360 100-1/8 37-7/8 4-3/8 18-3/8 1-1/2 2 2-1/2 1. Coils are field-installed between the evaporator coil and the blower section of the unit. TABLE16: BASE SECTIONSDIMENSIONS1 FIGURE 15: BASE SECTION DIMENSIONS BASE MODEL UNIT MODEL DIMENSIONS A B 1BS0406 LA300 LB360 100-1/8 37-7/8 1BS0407 LB480 103-1/8 45-1/4 1. Ventilation air can be brought into the unit through the base section providing the base section is fully insulatedinthe field. Unitary Products Group 036-21335-002-A-1102 TABLE 17: PHYSICAL DATA DESCRIPTION MODEL LA300 LB360 LB480 LB600 EVAPORATOR COIL Rows Deep X Rows High Finned Length, Inches ...

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