Assessments - 3, GPA: 3.7
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Facilidade de uso
These bases have a durable finish to match the evaporator blower unit. They may have to be insulated for certain applications. SUSPENSION PACKAGES: These accessories can be used to suspend horizontal units from above without interfering with access to the unit. They can also be used for elevating a floor-mounted unit (either horizontal or vertical) to provide additional height for the installation of a trap at the condensate drain connection. All suspension packages can be used with vibration isolators. HOT WATER COILS: Drainable water coils are available for field installation between the blower and the coil modules of both horizontal and vertical units. Since their casings match the dimensions and the finish of the basic units, they become an integral part of the unit after installation. The coils slide out of their casings for easy installation. Coils have copper tubes that have been mechanically expanded into aluminum fins. Both headers are located on the same end of the coil. Coils are leak-tested at 325 psig under water and dried before their connections are capped for storage and shipping. Unitary Products Group 036-21335-002-A-1102 STEAM COILS (LA300 & LB360 only): A steam coil is available on the 25 & 30 Ton for installation between the blower and coil modules of both horizontal and vertical units. Since the casing matches the dimensions and the finish of the basic unit, it becomes an integral part of the unit after installation. The coil slides out of the casings for easy installation and is pitched in the casings to facilitate condensate drainage. The coil has copper tubes that have been mechanically expanded into aluminum fins. Both headers are located on the same end of the coil. The coil is leak-tested at 325 psig and dried before the connections are capped for storage and shipping. BLOWER MOTORS: Different HP motors are available for each unit to meet almost any air delivery requirement. All motors are UL approved, have permanently lubricated ball bearings and are field-mounted within the insulated cabinet of the units to minimize the transmission of sound to the sur rounding space. 5 HP motors are inherently protected. 7.5 HP -15 HP require motor overload protection. DRIVE PACKAGES: Different size pulleys and belts are available for each unit to provide a blower RPM range to meet almost any air delivery requirement. Variable pitch motor pulleys canbeadjustedtoprovide theproperblower RPM. All drive packages are rated at least 25% above the nominal HP rating of the blower motor. Two-groove pulleys and two belts are provided on every drive package rated at 5 HP and above. STARTERS AND HEATER ELEMENTS (7.5 -15 HP): The blower motors that are available for the units do not have inherent protection and require external motor overload protection. See details in Table 7. TABLE 1: STATIC RESISTANCES FOR UNIT ACCESSORIES UNIT MODEL ACCESSORY CFM LA300 Hot Water Coil Steam Coil 8,000 9,000 10,000 11,000 12,000 0.06 0.11 0.07 0.14 0.08 0.17 0.09 0.20 0.10 0.23 LB360 Hot Water Coil Steam Coil 10,000 11,000 12,000 13,000 14,000 0.08 0.17 0.09 0.20 0.10 0.23 0.12 0.27 0.14 0.31 LB480 Hot Water Coil 12,800 14,400 16,000 17,600 19,200 0.11 0.13 0.15 0.17 0.20 LB600 Hot Water Coil 16,000 18,000 20,000 22,000 24,000 0.15 0.18 0.21 0.24 0.28 TABLE 2: UNIT MOUNTING DIMENSIONS1 LA/LB DIMENSIONS, INCHES UNIT AX BX CX 300 69-1/4 49-1/16 26-5/8 360 69-1/4 49-1/16 26-5/8 480 84 50-9/16 34 1. See Figure 4 for dimensions AX, BX and CX. Unitary Products Group 036-21335-002-A-1102 NOTE: The following illustration shows how the channels should be secured to the unit using the hardware provided with the suspension accessory. (2) 9/16 HOLES FOR 1/2 HANGER RODS FIGURE 3 : DETAILS FOR SECURING BOTTOM MOUNTING SUPPORTS 3 SUSPENSION CHANNEL 5/16 NUT, LOCKWASHER, FLATWASHER UNIT PANEL 5/16 BOLT, FLAT-WASHER UNIT ANGLESIDE PANEL 5/16 NUT, FLATWASHER 3/8 NUT (USED AS SPACER) D AX1-1/2 EVAP . C OIL S E C T IO N BLOWE R S E C T IO N HOR IZONT AL LE U360 O R 480 UNIT S US P E NDE D F R OM A B OV E 3 B C A AX BX BX VERTICAL LA300, LB360, LB480 UNIT SUPPORTED FROM BELOW 3 HEATING COIL 2 BLOWE R S E C T IO N EVAP . COIL S E C TIO N CX 4 D B A BX BX C SUSPENSION ANGLE S 1 1 2 3 4 The same channels can be used in either position.W hen used to support at vertical unit, these channels should be cut to match the bottom dimension of the evaporator coil section. The suspension channels have two sets of mounting holes to accommodate horizontal units with or without a heating coil. O n a horizontal unit without a heating coil, the suspension channels will extend 3" beyond both ends of the unit. The same channels can be used to support a horizontal, floor- mounted unit from below. After these bottom channels are cut per Note 1, a new hole will have to be drilled at the cut end if the unit is to be mounted on isolators. FIGURE 4 : LA300/LB360 WEIGHT DISTRIBUTION Unitary Products Group 036-21335-002-A-1102 TABLE 3: CORNER WEIGHTS UNITMODEL Unit Wei...
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