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036-21335-002-A-1102
Unitary Products Group 5
STEAM COILS (LA300 & LB360 only): A steam coil is avail-
able 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
motorpulleyscanbeadjustedtoprovidetheproperblower
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 pro-
tection. See details in Table 7.
TABLE 1: STATIC RESISTANCES FOR UNIT ACCESSORIES
UNIT MODEL ACCESSORY CFM
LA300
8,000 9,000 10,000 11,000 12,000
Hot Water Coil 0.06 0.07 0.08 0.09 0.10
Steam Coil 0.11 0.14 0.17 0.20 0.23
LB360
10,000 11,000 12,000 13,000 14,000
Hot Water Coil 0.08 0.09 0.10 0.12 0.14
Steam Coil 0.17 0.20 0.23 0.27 0.31
LB480
12,800 14,400 16,000 17,600 19,200
Hot Water Coil 0.11 0.13 0.15 0.17 0.20
LB600
16,000 18,000 20,000 22,000 24,000
Hot Water Coil 0.15 0.18 0.21 0.24 0.28
TABLE 2: UNIT MOUNTING DIMENSIONS
1
LA/LB
UNIT
DIMENSIONS, INCHES
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.