550.13-TG2Y (799)
4 Unitary Products Group
ules of both horizontal and vertical units. Since the casin
matches the dimensions and the finish of the basic unit, it
becomes an inte
ral part of the unit after installation. The coil
slides out of the casin
s for eas
installation and is pitched in
the casin
s to facilitate condensate draina
e. The coil has
copper tubes that have been mechanicall
expanded into alu-
minum fins. Both headers are located on the same end of the
coil. The coil is leak-tested at 325 psi
and dried before the
connections are capped for stora
e and shippin
.
BLOWER MOTORS Different HP motors are available for
each unit to meet almost an
air deliver
requirement. All
motors are UL approved, have permanentl
lubricated ball
bearin
s and are field-mounted within the insulated cabinet of
the units to minimize the transmission of sound to the sur-
roundin
space. All motors have inherent protection except
those available for the 50 ton unit. Motors for 50 ton units
require a starter and overload elements
DRIVE PACKAGES Different size pulle
s and belts are avail-
able for each unit to provide a blower RPM ran
e to meet
almost an
air deliver
requirement. Variable pitch motor pul-
le
s can be adjusted to provide the proper blower RPM. All
drive packa
es are rated at least 25% above the nominal HP
ratin
of the blower motor. Two-
roove pulle
s and two belts
are provided on ever
drive packa
e rated at 5 HP and
above.
STARTERS AND HEATER ELEMENTS (50 ton onl
) The
blower motors that are available for the 50 ton units do not
have inherent protection and require external motor overload
protection.
TABLE 1: STATIC RESISTANCES FOR UNIT ACCESSORIES
UNIT MODEL ACCESSORY CFM
LEU360
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
LEU480
12,800 14,400 16,000 17,600 19,200
Hot Water Coil 0.11 0.13 0.15 0.17 0.20
LEU600
16,000 18,000 20,000 22,000 24,000
Hot Water Coil 0.15 0.18 0.21 0.24 0.28
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