INSTALLATION
MANUAL
SPLIT-SYSTEM
(AIR COOLED)
EVAPORATOR BLOWER
CONTENTS
GENERAL....................................4
REPLACEMENTPARTS........................4
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INDOOR PRODUCT NOMENCLATURE . . . . . . . . . . . . 5
UNITINSTALLATION..........................11
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
See the following page for a complete Table of Contents.
MODELS: LB300
LB360
LB480
LB600
NOTES, CAUTIONS AND WARNINGS
Installer should pay particular attention to the words:
NOTE, CAUTION, and WARNING. Notes
clarify or makethe installation easier. Cautions
prevent equipment damage. Warnings
installer that personal injury and/or equipment damage
may result if installation procedure is not handled properly.
CAUTION: READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
are intended to
are given to
are given to alert
035-18496-000-C-1102
TABLE OF CONTENTS
035-18496-000-C-1102
GENERAL ......................................4
NOTES, CAUTIONS AND WARNINGS . . . . . . . . . . . . . . . .4
REPLACEMENTPARTS...........................4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
LIMITATIONS..................................4
INDOOR PRODUCT NOMENCLATURE . . . . . . . . . . . . . . .5
BLOWERMOTORMOUNTINGLOCATIONS.........7
LA300/LB360/LB480MOTORMOUNTING............7
LB600MOTORMOUNTING .......................7
MOTORMOUNTARRANGEMENTS ...............8
LA300/LB360/LB480 MOTOR ARRANGEMENTS . . . . . . 8
ADDITIONAL M OTOR ARRANGMENTS FOR
LA300/LB360/LB480 ............................8
LB600MOTORARRANGEMENTS..................9
RE-LOCATING THE LB600 MOTOR MOUNT ING PLATE 9
ALTERNATEPOSITIONONE......................9
ALTERNATEPOSITIONTWO .....................9
ALTERNATEPOSITIONTHREE ...................9
AIRDISCHARGECONVERSION ..................9
LA360/LB360/LB480 AIRDISCHARGE ..............9
LB600AIRDISCHARGE .........................11
UNITINSTALLATION ............................11
LOCATION...................................11
RIGGING ....................................11
CLEARANCES................................11
MOUNTING ..................................12
DUCT CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . .15
INSULATION ..................................15
SUPPLY AIR DUCTS . . . . . . . . . . . . . . . . . . . . . . . . . . .15
RETURN AIR DUCT ANGLES . . . . . . . . . . . . . . . . . . . . 16
DRAINCONNECTIONS .........................16
REFRIGERANTMAINS.........................16
EVAPORATORSECTIONPIPING .................17
EXPANSION VALVE BULB INSTALLATION . . . . . . . . .17
LA300........................................17
LB360/LB480/LB600 ............................17
LIQUIDLINESOLENOIDS .......................17
PUMPOUT ...................................18
BEARING ALIGNMENT: LB600 . . . . . . . . . . . . . . . . . . .18
AIR SYSTEM ADJUSTMENT . . . . . . . . . . . . . . . . . . . .18
TWINBELTDRIVEADJUSTMENT................18
ELECTRICALCONNECTIONS ...................19
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
LIST OF FIGURES
Fig.# Pg.#
1 LA300 AND LB360/LB480 FACTORY MOTOR
MOUNTINGPOSITION ........................7
2 LB600 FACTORY MOTOR MOUNTING POSITION . .7
3 LB600MOTORMOUNTPLATE..................7
4 LA300/LB360/LB480MOTOR LOCATION A . . . . . . . . 8
5 LA300/LB360/LB480MOTOR ARRANGEMENTS . . . .8
6 VERTICAL AIRFLOW ARRANGEMENTS . . . . . . . . . 10
7 HORIZONTAL AIRFLOW ARRANGEMENTS . . . . . .10
8 LB600AIRFLOWARRANGEMENTS.............11
9 DETAILS FOR SECURING BOTTOM MOUNTING
SUPPORTS ................................13
10 LA300/LB480/LB360 WEIGHT DISTRIBUTION . . . .13
11 LB600 WEIGHT DISTRIBUTION WITH SUSPENSION
APPLICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
12 DETAILS FOR SECURING SUSPENSION
CHANNELS ................................15
13 SUGGESTED METHOD FOR CONNECTING
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
14 RECOMMENDEDDRAINPIPING ...............16
15 LB600 CENTER BEARING . . . . . . . . . . . . . . . . . . . . . 18
16 DOUBLEGROOVEPULLEY ...................18
17 UNIT DIMENSIONS - LA300, LB360, LB480 . . . . . . .22
18 25TONLIQUIDLINESOLENOIDWIRING ........22
19 30, 40 & 50 TON LIQUID LINE SOLENOID
WIRING....................................22
20 LA300PIPINGCONNECTIONS.................23
21 LB360PIPINGCONNECTIONS.................23
22 LB480PIPINGCONNECTIONS.................23
23 UNITDIMENSIONS ..........................24
24 LB600 PIPING CONNECTIONS - END PANEL
DETAIL ....................................24
25 HOLE LOCATION FOR PRESSURE DROP
READING ..................................25
26 25-TON PRESSURE DROP VS. CFM ACROSS
INDOORCOIL ..............................26
27 30-TON - PRESSURE DROP VS. CFM ACROSS
INDOORCOIL ..............................26
28 40 TON - PRESSURE DROP VS. CFM ACROSS
INDOORCOIL(DOMESTIC) ...................27
29 50 TON - PRESSURE DROP VS. CFM ACROSS
INDOORCOIL ..............................27
30 INDOOR UNIT WIRING DIAGRAM LB360,
480&600 ..................................28
31 INDOORWIRINGDIAGRAMLA300 .............29
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035-18496-000-C-1102
LIST OF TABLES
Tbl.# Pg.#
1 UNIT APPLICATION DATA . . . . . . . . . . . . . . . . . . . . . 5
2 PHYSICALDATA .............................6
3 UNITMOUNTINGDIMENSIONS ................12
4 CORNERWEIGHTS..........................12
5 ACCESSORY OPERATING WEIGHT DISTRIBUTION
(LBS)......................................12
6 ELECTRICALDATA ..........................19
7 MOTOROVERLOADELEMENTS ...............19
8 UNITDRIVEDATA...........................20
Tbl.#
9 UNITBLOWERMOTORDATA .................20
10 FANPEFORMANCEDATA-25TON ............21
11 FANPEFORMANCEDATA-30TON ............21
12 FANPERFORMANCEDATA-40TON...........21
13 FANPERFORMANCEDATA-50TON...........21
14 UNIT DIMENSIONS - LA300, LB360, LB480 . . . . . . . 22
15 UNITCONNECTIONSIZES....................23
Pg.#
Unitary Products Group 3
035-18496-000-C-1102
GENERAL
The LA and LB evaporator units are designedfor use with the
HA/HB Series condensing units.Units are designed to match
up with LA/LB series Evaporator Blowers to meet ASHRAE
90.1 standards.
Each unit consists of a coil section and a blower section that
are factory assembled and shipped as shown in figures 3 and
4. These sections may be rearranged in the field for other air
discharge patterns. See figures 7, 8 and 9.
The LA and LB evaporator units have 24 volt normally closed
solenoid valves to match the 24-volt control circuits of the
Simplicity
HB360, HB480 and HB600 condensing units.
TM
control board in the HA300 as well as the
NOTES, CAUTIONS AND WARNINGS
Installer should pay particular attention to the words: NOTE,
CAUTION and WARNING. Notes
make installation easier. Cautions
equipment damage. Warnings
personal injury and/or equipment damage may result if installation procedure is not handled properly.
are intended to clarify or
are given to prevent
are given to alert installer that
REPLACEMENT PARTS
Refer to parts manual for complete listing of replacement
parts on this equipment. The above forms and all other forms
referenced on this instruction may be ordered from;
Standard Register
2101 W. Tecumseh Road
Norman, OK 73069
Telephone : (877) 318-9675
Toll Free Fax: (877) 379-7920
INSPECTION
As soon as a unit is received, it should be inspected for possible damage during transit. If damage is evident, the extent of
the damage should be noted on the carrier's freight bill. A
separate request for inspection by the carrier's agent should
be made in writing.
LIMITATIONS
This unit must be installed in accordance with all national and
local safety codes. If no local codes apply, installation must
conform to the appropriate national code. The unit is
designed to meet National Safety Code Standards. If
components are to be added to a unit to meet local codes,
they are to be installed at the dealer's and/or the customer's
expense. See Table1 for unit application data.
4 UnitaryProductsGroup
035-18496-000-C-1102
INDOOR PRODUCT NOMENCLATURE
L A 300 C 00 A 6 A AA 1
Model #
300
AA Additional Options AA = None
Model Number
Description
Options
L Product Category L = Air Handling Unit
A Product Identifier
Nominal Cooling
Capacity
MBH
A = R-22 Standard Efficiency 2-Pipe
B = R-22 Standard Efficiency 4-Pipe
300 = 25 Ton
360 = 30 Ton
480 = 40 Ton
600 = 50 Ton
C Heat Type C = Cooling Only
Nominal Heating
00
Capacity
00 = No Heat Installed
A Airflow Options A=None
6 Voltage 5 = 575-3-60 6 = 208/230-460-3-60
A Installation Options A=None
1 Product Generation 1 = First Generation 2 = Second Generation
NOTE: LB600 Indoor Unit matches with both HB480
and HB600 Outdoor Condensing Units for
maximum efficiency.
TABLE 1: UNIT APPLICATION DATA
Entering Air Temperature Degrees °F
Model Power Supply Voltage
208/230-3-60 187 253 8,000 12,000 65/57 95/72 40 77
LA300
LB360
LB480
LB600
*.
Heating Min/Max temperatures apply to steam and hot water coils. NOTE: Do not apply steam to hot water coils.
460-3-60 414 506 8,000 12,000 65/57 95/72 40 77
575-3-60 540 630 8,000 12,000 65/57 95/72 40 77
208/230-3-60 187 253 10,000 14, 000 65/57 95/72 40 77
460-3-60 414 506 10,000 14,000 65/57 95/72 40 77
575-3-60 540 630 10,000 14,000 65/57 95/72 40 77
208/230-3-60 187 253 12,800 19, 200 65/57 95/72 40 77
460-3-60 414 506 12,800 19,200 65/57 95/72 40 77
575-3-60 540 630 12,800 19,200 65/57 95/72 40 77
208/230-3-60 187 253 16,000 24, 000 65/57 95/72 40 77
460-3-60 414 506 16,000 24,000 65/57 95/72 40 77
575-3-60 540 630 16,000 24,000 65/57 95/72 40 77
VoltageVariation Supply Air Range CFM
Min. Max. Min. Max. Min. Max. Min. Max.
Cooling
DB/WB
Heating DB
*
Unitary Products Group 5
TABLE 2: PHYSICAL DATA
DESCRIPTION
Rows Deep X Rows High 4 x 40 4 x 40 4 x 50 4 x 62
Finned Length, Inches 93 93 96 96
EVAPORATOR
COIL
CENTRIFUGAL
BLOWERS (2 PER UNIT)
FILTERS (THROWAWAY)
OPERATING CHARGE
(LBS R-22)
DRAINABLE HOT WATER
COIL ACCESSORY
NON-FREEZE, STEAM
DISTRIBUTING COIL
ACCESSORY
COMPONENT WEIGHT
Face Area, Feet
Tube (copper) OD, Inches 3/8 3/8 3/8 3/8
Fins (Aluminum) per 1 inch 16 16 16 16
Piping Connections,
Inches
Diameter X Width, Inches (Forward Curved) 18 x 18 20 x 18
Size and Quantity Per
Model, Inches
Total Face A rea / feet
System 1 49.65 30.08 37.83 46.59
System 2 - 30.08 37.83 46.59
Tube (copper) OD, Inches 1/2 1/2 1/2
Rows Deep 2 2 2
Fins (Aluminum) per 1 inch 12 12 8
Face Area, Feet
Connections (Supply & Return), Inches 1 3/8 OD (Copper) 1 5/8 OD (Copper)
Tube (copper) OD, inches 1 (Outside) 5/8 (Inside)
Rows Deep 1
Fins (Aluminum) per 1 inch 8
Face Area, feet
Connection, (Brass )
Inches (NPTE)
Basic Unit (Less Motor & Drive) 980 980 1260 1474
Shipping Weight (lbs) 1180 1180 1510 Operating Weight (lbs) 1125 1146 1426 1640
Accessories
Blower Motor (1750 RPM)
035-18496-000-C-1102
MODEL
LA300 LB360 LB480 LB600
2
Liquid, Inches 7/8 7/8 7/8 7/8
Suction, Inches 2 1/8 1 1/8 1 3/8 2 1/8
16 x 20 x 2 - 6 20 x 20 x 2 - 3 20 x 22 x 2 - - 16 x 25 x 2 - - 6
20 x 25 x 2 10 6 3
25 x 25 x 2 - - 6
2
2
2
Inlet 2
Outlet 1-1/2
Hot Water C oil 150 150 190 190
Steam Coil 160 160 - -
25.8 25.8 33.3 41.3
34.7 42.6 53.1
21.2 27.2 27.2
18.2
N/A
117(5hp) 117 (5hp) - -
120 (7.5hp) 120 (7.5hp) 120 (7.5hp) 141 (10hp)
- 141 (10hp) 141 (10hp) 217 (15hp)
6 UnitaryProductsGroup
035-18496-000-C-1102
a
BLOWER MOTOR MOUNTING LOCATIONS
Unitsareshippedfrom the factory less motor and drives. The
blower motor and drive packages are ordered and shipped
separatelyfor field mounting. However, the units are shipped
with the motor mounting assembly installed as shown in
1 for the LA300, LB360, LB480 and 2 for the LB600.
MOTOR MOUNTING
CHANNELS AND
MOUNTING PLATE
ARE ALWAYS
SHIPPED IN THIS
LOCATION.
FIGURE 1 - LA300 AN LB360/LB480 FACTORY
MOTOR MOUNTING POSITION
NOTE: The 5HP motors are not inherently protected.
A lte rn a tiv e P o s itio n
1 F o r P iv o t B o lts
Alternate
Position 3
F o r P iv o t B o lts
A lte rn a tiv e P o s itio n
2 F o r P iv o t B o lts
LA300/LB360/LB480 MOTOR MOUNTING
The LA300, LB360 and LB480 ship from the factory with a
motor mounting adapter plate for use with the 7.5 and 10 HP
motors. If a 5 HP motor is used,the adapter is not necessary
and should be removed and discarded.
LB600 MOTOR MOUNTING
The motor mounting plate will accommodate a 10 or 15 HP
motor. One set of boltholes is provided on each end of the
motor mounting plate for either motor. The motor mounting
plate can be raised or lowered to any position on the adjustment screws to adjust the belt tension for the various pulley
settings to cover the complete range of blower speeds.
The physical size of the 15HP motor reducesthe adjustment
range of the motor mounting plate. To maximize this amount
of adjustment, one set of boltholesis provided near the
adjustment screws on each end of the motor mounting plate
(refer to 4).
For some motor/blower wheel arrangements,however, the
motor cannot be mounted in these bolt holes because the
motor terminal box would interfere with one of the blower section panels. To make these motor/blower wheel arrangements possible, a second set of boltholes is provided near
the pivot bolts on each end of the motor mounting plate.
15 H P
10 H P
15 H P
15 H P
Adjustm ent
S c re w (2 )
M otor M ounting P late
(S tandard Location
s Shipped)
P iv o t B o lt (2 )
FIGURE 2 - LB600 FACTORY MOTOR MOUNTING
POSITION
Adjustm ent
Screw Holes
15 H P
15 H P
15 H P
10 H P
FIGURE 3 - LB600 MOTOR MOUNT PLATE
The motors used withthe evaporator blower are 3-phaseand
can drive the blower wheels from either end of the blower
section. Reversing the direction of rotation can be accomplished by changing the connection of the power supply wiring at the motor terminal box.
NOTE: The 7.5-15 HP blower motors have solid bases
and are not inherently protected. For proper
operation, these motors require overload
heater elements. Please see curent product
price pages for overloads.
Unitary Products Group 7
The 15 HP drive package requires two different lengths of
belts to vary the blower wheel RPM over the complete range
of rated conditions. When the motor is mounted near the
adjustment screws, the two lengths of belt are interchangeable except for the higher and lower limits of blower wheel
RPM. When the m otor is mounted near the pivot bolts, the
shorter length of belt is recommended for the higher blower
wheel Rpm's and the longer length of belt is recommended
for the lower blower wheel Rpm's. See Page 7 for the recommended blower motor locations.
035-18496-000-C-1102
MOTOR MOUNT ARRANGEMENTS
The motor mounting arrangement can be changed to allow
motor access based on the airflow arrangement required.
The recommended motor location for each blower arrangement is as follows.
LA300/LB360/LB480 MOTOR ARRANGEMENTS
The LA300, LB360 and LB480 units are shipped with the
motor mount in locationA as shownin 4. If this is the desired
position, the motor mounting assembly is already in the correct position and the motor and drive package can be
installedwithout modifications.
ADDITIONAL MOTOR ARRANGMENTS FOR LA300/
LB360/LB480
Move the entire motor amounting assembly (both the mounting plate and the channels) so that the mountingplate will be
in the correct location.
1. Rotate the motor mounting plate 180 degrees on the
mountingchannels.(For locations B, andD only! Do not
rotate the plate for location C or E.)
MOTOR
MOTOR
MOTOR
MOUNTING
MOUNTING
CHANNELS
PLATE
FIGURE 4 - LA300/LB360/LB480 MOTOR
LOCATION A
2. Install the motor and drive package.
NOTE: The blower section must be lifted off the evap-
orator section to gain access to the mounting
channel fasteners. Since these sections have
to be repositioned for the arrangements 2
through 10 and 12 of 6, the motor mounting
assembly should be relocated before the two
sectionsare rejoined.
ARRANGEMENT 1, 4, 8 OR 11
B
A
SEE
NOTES
ARRANGEMENT 3, 5 OR 10
SEE
NOTES
E
NOTE: Since the motor mounting assembly cannot be
secured to the panel with the blower openings,
the motor cannot be installed in either of the
normally recommended bottom positions.
FIGURE 5 - LA300/LB360/LB480 MOTOR ARRANGEMENTS
ARRANGEMENT 2, 6 OR 7
D
C
ARRANGEMENT 9 OR 12
C
SEE
NOTES
SEE
NOTES
8 UnitaryProductsGroup
035-18496-000-C-1102
LB600 MOTOR ARRANGEMENTS
The LB600 unit is shipped with the motor mount in the standard location as shown in 2.
If this is the desired position, the motor mounting assembly is
already in the correct position and the motor and drive package can be installed without modifications.
RE-LOCATING THE LB600 MOTOR MOUNTING PLATE
The motor mounting plate can bere-locatedin three alternate
positions:
ALTERNATE POSITION ONE
For locating motor mounting plate in alternate position one,
see 3 and re-locate as follows:
1. Remove pivot bolts from the mounting plate.
2. Remove the mounting plate from the adjustment screws.
3. Rotate mounting plate 180.
4. With pivot bolts removed in Step 1 fasten the mounting
plate to alternate position No. one.
5. Fasten mounting plate to the adjustment screws.
ALTERNATE POSITION TWO
The motor mounting plate, the pivot bolts and the adjustment
screws can be m oved intoa position similar to the one shown
as standard in 3 but under the other blower scroll. The framework under each blower scroll has the same bolthole
arrangement.
ALTERNATE POSITION THREE
The motor mounting plate, the pivot bolts and the adjustment
screws can be moved into a position similar to the one
detailed in alternate position one but behind the other blower
scroll. The framework behind each blower scroll has the
same bolthole arrangement.
AIR DISCHARGE CONVERSION
LA360/LB360/LB480 AIR DISCHARGE
The LA300 LB360 and LB480 units are shipped for upflow
operation, but may be converted for any of the illustrated air
discharge patterns shown in 7 and 8. C onvert as follows:
1. Remove the panels from the blower section.
2. Remove the Phillips machine screws located inside casing corner angles that hold the coil and blower sections
together.
3. Rotate the blower section for the desired air discharge
pattern.
NOTE: Before proceeding to step 4, see the section
on the blower motor mounting locations and
mount the blower motor in the desired position.
4. If accessory heating coils are used, mount heating coil
between cooling coil and blower sections. Screw fastening locations are the same for all sections and heating
accessories. If heating coils are not used, fasten coil
section to blower section with machine screws removed
in step 2.
5. Before replacingpanels, see duct connectionsand drain
connections.
6. Replace panels.
Unitary Products Group 9
035-18496-000-C-1102
1
BLOWER
AIR
AIR
EVAPORATOR
COIL
AIR
2
AIR
**
AIR
AIR
4
AIR
AIR
5
**
FIGURE 6 - VERTICAL AIRFLOW ARRANGEMENTS
78
VERTICAL ARRANGEMENTS
AIR
AIR
AIR
3
AIR
*
6
* IF REQUIRED, SOME AIR CAN
BE BROUGHT THROUGH THE
BOTTOM OF THE EVAPORATOR
SECTION.
AIR
*
9
AIR
AIR
AIR
10
AIR
AIR
FIGURE 7 - HORIZONTAL AIRFLOW ARRANGEMENTS
AIR
11
AIR
AIR
AIR
12
AIR
AIR
10 UnitaryProductsGroup
035-18496-000-C-1102
LB600 AIR DISCHARGE
The LB600 blower and coil section are shipped separately
and must be joined in the field. The blower section can be
mounted either above the coil for a vertical positioning or
beside the coil for horizontal positioning. Both vertical and
horizontal positions can be arranged for upward, downward,
or horizontal air discharge.
1
2
3
54
NOTE: Ductwork should never be used to support the
blower section. Refer to duct connection for
more information
UNIT INSTALLATION
LOCATION
The evaporator blowers are not designed for outdoor installation. They must be located inside the building structure,
either inside or outside the conditioned space where they are
protected from rain and other such moisture.
The unit should be located as close to the condensing unit as
practical and positioned to minimize bends in the refrigerant
piping.
Units being installed vertically or horizontally can be set
directly on a floor or platform, or supported by metal or
wooden beams.
Units being installed horizontally (LA300, LB360 & LB480
only) can be suspended from above as shown in figure 12.
Refer to form 035-18501-000 for more information on the
installationof the suspension accessory and for the individual
load on each hanger rod.
6
7
FIGURE 8 - LB600 AIRFLOW ARRANGEMENTS
The coil section and the blower section may be assembled
together as shown in 8. All arrangements may be by rearranging the panels as shown.
When arranged vertically (8, arrangements 1 through 3), the
LB600 can be set directly on any floor or platform that is
capable of supporting its weight.
When arranged horizontally (8, arrangements 4 through 7),
the evaporator coil section can be set directly on the floor, but
a 9" support is required under the blower section to stabilize
the unit. The support should extend the full width of the
blower section and be located under the edge away from the
evaporator coil section. If the unit does not have to be
secured to the platform, the 9" support will not have to be
bolted to either the blower section or the floor.
The evaporator blower arrangement 7 shown in 8 is not recommended for bottom support due to interference with the
ductwork connection.
RIGGING
Caremustbetakenwhenmovingtheunit. Donotremove
any packaging until the unit is near the place of installation.
SPREADER BARS SHOULD BE USED BETWEEN THE
SLINGS TO PREVENT CRUSHING THE UNIT FRAME OR
PANELS. When preparing to move the unit, always determine the center of gravity of the unit in order to equally distribute the weight. Rig the unit by attaching chain or cable
slings around the bottom skid. A lift truck may be used to
raise a unit to a suspended location. Refer to Table 2 for the
total unit operating weight.
CLEARANCES
A 25-inch clearance is required on the end with the piping
connections and the supply air blower motor to properly service and maintain the unit and to replace the filters.
Some clearance will also be required for the duct and power
wire connections. A clearance equal to the unit width is
required on one end of the unit if the blower shaft or evaporator coil is to be replaced without moving the unit.
Unitary Products Group 11
TABLE 3: UNIT MOUNTING DIMENSIONS
035-18496-000-C-1102
LA/LB
UNIT
300
360
480
AX BX CX
69-1/4 49-1/16 26-5/8
69-1/4 49-1/16 26-5/8
84 50-9/16 34
DIMENSIONS, INCHES
MOUNTING
The evaporator blower may be suspended from the joists with
isolation type hangers or hooks. Suspension accessory
1HH0403, which includes three suspension channels and
hardware, may be ordered separately. The channels extend
TABLE 4: CORNER WEIGHTS
UNIT-
MODEL
LA300 1180 1125
LB360 1180 1146
LB480 1510 1426
LB600 - 1640
Unit Weight (Lbs.)
across the evaporator coil section, the heating coil section (if
included) and the blower section. Each channel is to be
bolted to each section as shown in 9.
Configuration ABCDShipping Operation
HORIZONTAL 276 317 285 247
VERTICAL 262 301 301 262
HORIZONTAL 281 323 290 252
VERTICAL 266 307 307 266
HORIZONTAL 348 414 361 303
VERTICAL 292 348 427 359
HORIZONTAL 451 386 370 433
VERTICAL 484 414 342 400
TABLE 5: ACCESSORY OPERATING WEIGHT DISTRIBUTION (LBS)
ACCESSORY
†
BASE
HOT WATER COIL
STEAM COIL 1 ROW
*.
These weights should be added to each point load (W1 through W6) in table 5.
†.
This accessory can only be applied on units installed in the vertical position.
LA300 LB360 LB480 LB600
25 25 30 45
35 35 45 35
30 30 35 50
*
12 UnitaryProductsGroup
035-18496-000-C-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
SUSPENSION
CHANNEL
5/16 NUT,
FLATWASHER
3/8 NUT (USED
AS SPACER)
3
LOCKWASHER,
FLATWASHER
UNIT PANEL
5/16 BOLT,
FLAT-WASHER
SIDE
PANEL
UNIT ANGLE
FIGURE 9 - DETAILS FOR SECURING BOTTOM MOUNTING SUPPORTS
D
AX
AX
A
3
1-1/2
EVAP. C OIL
HOR IZONTAL
LE U 360 O R 480
UN IT S U S PE ND ED
FR OM ABOVE
T he s ame c hannels ca n be us ed in e ither pos ition. W he n us ed to
1
support at ve rtical u nit, the se c hannels s hould be c ut to ma tch the
bottom dimens ion of the e vapora tor coil s ection.
T he s uspens ion cha nnels h ave two s ets o f mounting holes to
ac commodate horizontal u nits with or without a he ating coil. O n
2
a h orizontal unit without a h eating coil, th e s uspens ion cha nnels
will extend 3 " beyond both e nds of the unit.
3
S E CT ION
BX
VERTICAL LA300, LB360, LB480
UNIT SUPPORTED FROM BELOW
BX
C
HE AT ING C OIL
SUSPENSION
ANGLE S
2
A
1
B
BLOWER
S E CT ION
5/16 NUT,
D
BLOWER
S E CT ION
BX
B
EVAP.
COIL
S E CT ION
4
CX
BX
C
T he s ame c hannels can b e us ed to s upport a horiz ontal, fl oor-
3
mounted unit from be low.
After these bottom c hannels are c ut per Note 1 , a new h ole will h ave
4
to be d rilled a t the cut e nd if the unit is to be m ounted on is olators.
FIGURE 10 - LA300/LB480/LB360 WEIGHT DISTRIBUTION
Unitary Products Group 13
D = 295 LB S .
035-18496-000-C-1102
E = 300 LB S .
SUSPENSION
CHANNELS
A = 275 LB S .
B=280 LB S .
2
1
C =285 LB S.
2
1
2
1
2
F=310 LB S .
AIR
IN
BLOW ER SECTION
HEATING COIL (ACCESSO R Y)
EVAPORATOR CO IL SECTIO N
FIGURE 11 - LB600 WEIGHT DISTRIBUTION WITH SUSPENSION APPLICATION
The weights for the LB600 shown in 11 include only the evaporator coil section, the blower section with a 10HP motor and
the suspension accessory. Add the weights listed for a horizontal arrangement in Table 4 to determine the weight distribution of the unit with accessories. See 12 for details on
connecting the center channel to the unit at points one and
two.
The weights are located 5" from both ends of each suspension channel.
When arranged horizontally (see 8) the LB600 evaporator
blower can be suspended from overhead joists with hanger
rods using the suspension accessory.
The suspension channels require no drilling or cutting. Each
channel has enough holes in its bottom flange for:
1. Four bolted connections to the evaporator coil section.
(Only two are used on the outside supports)
3. Four bolted connections to the blowersection. (Only two
are used on the outside supports)
See 12 for the bolted connection in detail.
When the heating section is not included, each channel will
extend 3" beyond the front and the rear of the unit. Boltholes
inthebottomflangeofeachchannelwillstillalignwiththe
holes provided in the top framework of the evaporator coil
section and the blower section.
For both outsidechannels and for the 1" locations on thecenter channel, the bolted connections are to be made where the
top sheet metal panels are attached to the unit framework.
The ¼" screws and cage nuts must be removed and may be
discarded. For the 2" locations on the center channel, the
bolted connections are to be made through the knockouts in
the top sheet metal panels. 5/16" cage nuts are provided in
the unit framework under these knockout locations. Note that
these cage nuts are part of the basic unit. They are not supplied with the suspension accessory.
2. One bolted connection to the heating coil section.
Refer to 11 as well as Table 3 and Table 4 for mounting
details and unit weight distribution.
14 UnitaryProductsGroup
035-18496-000-C-1102
SUSPENSIO N CH ANN EL
5/16-18" HE X NU T
OUTSIDE CHANN EL
9/16" H O LE FO R 1/2" H A N G ER R O D
(2 P E R C H A N N E L )
5/16-18" HE X NU T
LOCK W ASHER
SPACER (3/8" LONG )
SID E PAN EL
C E N TE R C H A N N E L (Location "1" Figure 6)
SUSPENSIO N CH ANN EL
5/16-18" HE X NU T
TOP PANEL
CENTER FRAME
OF UNIT SECTIONS
(2 1 /8 " X 3 /8 " )
M AC H IN E SC R E W (5/16-18 X 1-1/2 LG )
C E N TE R C H A N N E L (Location "2" in Figure 6)
SUSPENSIO N CH ANN EL
9/16" FLA T W AS H E R
TOP PANEL
CENTER FRAME
OF UNIT SECTIONS
(2 1 /8 " X 3 /8 " )
5/16-18" CA G E NU T
9/16" FLA T W AS H E R
TOP PANEL
9/16" FLA T W AS H E R
M AC H IN E SC R E W (5/16-18 X 1-1/2 LG )
OUTER FRAME OF UNIT SECTION
(1 -3/4 " X 1 -3/4 ")
9/16" H O LE FO R 1/2" H A N G ER R O D
(2 P E R C H A N N E L )
5/16-18" HE X NU T
LOCK W ASHER
9/16" FLA T W AS H E R
SPACER (3/8" LONG )
TOP PANEL
9/16" FLA T W AS H E R
9/16" H O LE FO R 1/2" H A N G ER R O D
(2 P E R C H A N N E L )
M AC H IN E SC R E W (5/16-18 X 1-1/2 LG )
LOCK W ASHER
9/16" FLA T W AS H E R
SPACER (1/2" LONG )
TOP PANEL
FIGURE 12 - DETAILS FOR SECURING SUSPENSION CHANNELS
DUCT CONNECTIONS
Ductwork should always be suspended with hangers or supported by legs. It should never be fastened directly to the
building structure.
Allow clearance around ducts for safety in the handling of
heated air and for insulation when required.
INSULATION
Ductwork insulation should meet the following criteria:
Be used when ducts pass through an unconditioned space in
the cooling season or through an unheated space during the
heating season.
Unitary Products Group 15
Include a vapor barrier around the outside to prevent the
absorption of moisture.
Be no less than 2 inches thick with the weatherproof coating
when applied to ducts exposed to outdoor conditions.
SUPPLY AIR DUCTS
See 13 for suggested method of connecting supply air ductwork. Non-flammable material collars should be used to minimize the transmission of noise and/or vibration.
(
)
NON-FLAMMABLE
COLLAR
24"
AIR
OUTLET
BLOWER
GASKETS
BY INSTALLER
DUCT
FLANGED DUCT
CONNECTION
(FIELD
FABRICATED)
FIGURE 13 - SUGGESTED METHOD FOR CONNECTING DUCTWORK
035-18496-000-C-1102
DUCT
TRANSITION
RETURN AIR DUCT ANGLES
Return air duct angles are shipped turned in. They are
intended to be unscrewed and turned for connection of ductwork. The return air grille accessory attaches in the same
manner as the panels.
DRAIN CONNECTIONS
All drain lines MUST be trapped and located so they will not
be exposed to freezing temperatures.
The evaporator blower has 7/8" OD steel condensate stub at
each end of a single drain pan. Both ends are closed with
plastic caps. A plastic or rubber ell can be used. (Field supplied) Attach the ell to the desired end and run a full size 7/8"
drain line to the nearest drain facility. Seal the cap at the
unused end with suitable mastic.
Drain piping should be constructed as shown in 14. The 3inch dimension must equal or exceed the negative static
pressure developed by the supply air blowers. If it does not,
the condensate will not drain properly and may overflow the
drain pan. The trap must be at least 2-inches deep to maintain a water seal under all operating conditions, especially
when the blowers are starting.
FIGURE 14 - RECOMMENDED DRAIN PIPING
REFRIGERANT MAINS
Hard drawn copper tubing should be used where no appreciable amount of bending around pipes or other obstructions
is necessary. Use long radius ells wherever possible. If soft
copper is used, care should be taken to avoid sharp bends
that may cause a restriction.
Where refrigerant lines pass through a wall, pack fiberglass
insulation and a sealing material such as permagum around
the refrigerant lines to reduce vibration and to retain some
flexibility in the lines.
16 UnitaryProductsGroup
035-18496-000-C-1102
Suitable hangers, brackets or clamps should support the
refrigerant lines.
Braze all copper-to-copper joints with Silfos-5 or equivalent
brazing material. Do not use soft solder.
Never braze or solder the liquid and suction lines together.
The complete suction line should be insulated with no less
than ½" Armaflex or equivalent.
If it is desirable to tape or wire the liquid and suctions lines
together for support purposes, they must be completely insulatedfromeachother.
EVAPORATOR SECTION PIPING
The units are shipped with a holding charge of R-22. The
connections are terminatedwith a copper disc brazed over
the ends.
Before starting installation of the mains, be sure the unit has
not developed a leak in transit by connecting a pressure
gauge to the service access port. If pressure still exits, the
circuit may be considered leak free. If pressure does not
exist, the unit must be evacuated along with the field installed
refrigerant piping.
NOTE: To minimize the possibility of system failure
due to dirt and moisture, a filter-drier must be
installed in each liquid line as close to the
evaporator as possible. Filter-driers are not
supplied with the evaporator blowers. They
are supplied with the matching HA/HB series
condensing units.
The temperature required to make or break a brazed joint is
sufficiently high to cause oxidation of the copper unless an
inert atmosphere is provided.
The liquid, suction and drain connectionsinside the unit must
be piped to the outside. Refer to 17 and 23 for unit dimensions or the locations and the dimensions of the access
openings in the unit panel.
Remove the evaporatorholding charge and any caps or discs
on the liquid and suction connections that will not permit a
free flow of nitrogen.
Connect a supplyof dry nitrogen through a reducing regulator
to an access valve or charging tail. Choose a procedure that
will allow nitrogen to flow continuously through the system
and reach all jointsto be brazed.
Begin the refrigerant main piping by installing the liquid line
from the condensing unit to the evaporator liquid connection,
maintaining a flow of nitrogen during all brazing operations.
The filter drier and sight glass must be located in this line,
close to the evaporator. Make the suction line connection at
the evaporator and run the line to the condensing unit.
After puncturing the sealing caps with a small drill bit,
unbraze the condensing unit suction disc and connect the
line. Maintainaflowofnitrogenthroughtheliquidlinetothe
evaporator, through the evaporator, back to the condensing
unit and out the suction connection and service port.
NOTE: Size the suction line outside the evaporator
casing per the line sizing information provided
in the condensing unit instruction form 03518499-000.
EXPANSION VALVE BULB INSTALLATION
LA300
The bulbs for the thermal expansionvalve on theblower units
are not factory-installed in its final location; it's only temporarily taped for shipment. They must be fastened in a 4
o'clock and 8 o'clock position to the common suction l ine out
of the evaporator coil after piping connections are made. Use
the bulb clamps from the bag taped to the suction connection
inside the blower unit.
LB360/LB480/LB600
The bulbs for the thermal expansionvalve on theblower units
are not factory-installed in its final location; it's only temporarily taped for shipment. The bulbs for system one must be
fastened in a 4 o'clock and 8 o'clock position to the system
one suction line of system one leaving the evaporator coil
after piping connections are made. Repeat the procedure for
system two, locating the bulbs in a 4 o'clock and 8 o'clock
position to the system two suction line. Use the bulb clamps
from the bag taped to the suction connection inside the
blower unit.
NOTE: Ensure the TXV bulbs are not crossed
between systems. Undesirable performance
and possible compressor damage may occur.
LIQUID LINE SOLENOIDS
The unit is shipped with factory installed, normally closed, liquid line solenoid valves. When the solenoid coil is energized
with a 24-volt signal, the valve will open.
During brazing operations, the valves should be placed in the
OPEN position by removing the stem cap with a 9/16”
wrench, then rotating the exposed valve stem inward
(CLOCKWISE), approximately 10-12 full turns (from the fully
CLOSED position), using a 4” adjustable wrench.
The valve stems should be returned to the CLOSED
(COUNTER-CLOCKWISE) position prior to the unit’soperation. The “Pump-out” procedure is detailed in the following
section.
The sequence of operation applies to the HA/HB condensing
units and LA/LB air handlers when applied as a matched system. Non-matched systems will have to be field wired to operate in a similar fashion as described on page 19.
NOTE: See Liquid Line Solenoid Wiring on page 22.
Unitary Products Group 17
PUMP OUT
The pump out function is a standard feature on the 25 to 50
ton systems. The pump out circuit is activated each time the
first and third compressor stage is called for by the thermostat. As such, it’sa“Pump Out On Start Up” design. A normally closed solenoid valve (POS1, 2, 3 or 4) is placed in the
liquid line, just prior to expansion valve.
When cooling is not being called for by the thermostat, the
pump out solenoid (POS) is not energized, so it’sinthe
closed position. When the Simplicity™ control receives a call
for cooling, it energizes a compressor. With the POS being
closed, it causes the pressure on the low side of the system
to begin falling.
When the low pressure switch (LPS) opens, the control board
energizes its on-board pump out relay, providing a 24 vac
output to an external relaly used to energized the pump out
solenoid. The refrigeration circuit being controlled is not in
normal operating mode.
035-18496-000-C-1102
BEARING C OLLAR
SET SC REW
BEARING
C O LLA R
BLOW ER
SHAFT
SHIM
SHAFT
RO TATION
BOLT "B" BOLT "B"
BEARING SU PPOR T ANG LE
BOLT "A"
BEARING
BEARING
C O LLA R
REM O VAL
HOLE
FIGURE 15 - LB600 CENTER BEARING
AIR SYSTEM ADJUSTMENT
Refer to Tables 7-11 on pages 19-20 to adjust the air system.
If the low pressure switch is already open on a call for cooling, the pump out relay is energized immediately. If the LPS
does not open after 5 minutes, the pump out relay is energized.
BEARING ALIGNMENT: LB600
Before the supply air blowerdrive is installed,turn the blower
assemblyby hand several times. If it doesn't rotate freely, the
center bearing may have been knocked out of alignment during shipping and/or rigging. To realign, refer to 15 and the following instructions:
1. Loosen the bearing collar set screw.
2. With a drift pin in the bearing collar removal hole, loosen
the bearing collar by tapping the drift pin in the direction
opposite to the shaft rotation.
3. Loosen bolts "A" and "B".
4. Remove the shim.
NOTE: The bearing support angle must be horizontal
to the unit and below the bearing.
5. Tighten bolts "B" without the shim.
6. Tighten bolts "A".
7. With a drift pin in the bearing collar removal hole, tighten
the bearing collar by tapping the drift pin once in the
direction of the shaft rotation.
TWIN BELT DRIVE ADJUSTMENT
Check to see if both belts drive at the same speed. Do this
by making a mark across both belts. Turn the drive several
revolutions by hand. If mark has not separated, the belts are
traveling at the same speed.
Twingroove blower motor pulleys should be installed with the
shaft set screw (A) towards the motor (see 16).
B
A
C
B
E
D
C
STATIONARY WEB
FIGURE 16 - DOUBLE GROOVE PULLEY
If necessary to align pulleys, the housing of the twin groove
motor pulley may extend 25% of its length beyond end of
motor shaft.
8. Tighten the bearing collar set screw.
9. Loosen bolts "B"
10. Raise the blower shaft and re-install the shim between
Always align twin groove pulleys using the stationary web.
The blower motor pulleys are adjustable by half turns. Select
required RPM from table 5 and adjust pulley.
the bearing and the bearing support angle.
11. Tighten bolts "B".
18 UnitaryProductsGroup
035-18496-000-C-1102
Check belt tension. Drive packages are supplied with fiberglass belts that must be properly tensioned at installation
because they do not stretch. The belt should deflect 3/16"
per foot of belt span with a 2 or 3-pound force. Alignment of
the resilient motor mount can be corrected by adjustment at
the slots on the end opposite the pulleys.
ELECTRICAL CONNECTIONS
The electric box ships complete with motor starter, transformers, relays and terminal block for making field connections.
Remember: One air handlers with factory installed pump out
solenoids, wires to the solenoid must be field connected.
Refer to Figures 30 & 31 for Indoor Unit Wiring Diagrams.
Install a power supply to meet the requirements listed in
table 6.
Provide a disconnect switch and fusing as required.
Install interconnecting control wiring between condensing
section, evaporator blower and room thermostat.
Starters are shipped without overloads. These must be
ordered separately to match the selected motor used in the
air handler. See unit’s Technical Guide or price page for correct overload.
NOTE: For the 10HP 200/208-volt motors, install the
power wiring to the supply air blower through
the starter.
TABLE 6: ELECTRICAL DATA
UNIT
MODEL
LA300
LB360
LB480
LB600
HP FLA
5
7.5
5.0
7.5
10
7.5
10
10
15
VOLTAGE
(3PH-60HZ)
16.7 208 21 35
15.2 230 19 30
7.6 460 10 15
6.1 575 8 15
24.2 208 30 50
22 230 28 45
11 460 14 20
9 575 11 20
16.7 208 21 35
15.2 230 19 30
7.6 460 10 15
6.1 575 8 15
24.2 208 30 50
22 230 28 45
11 460 14 20
9 575 11 20
30.8 208 39 60
28 230 35 60
14 460 18 30
11 575 14 20
24.2 208 30 50
22 230 28 45
11 460 14 20
9 575 11 20
30.8 208 39 60
28 230 35 60
14 460 18 30
11 575 14 20
30.8 208 39 60
28 230 35 60
14 460 18 30
11 575 14 20
46.2 208 58 100
42 230 53 90
21 460 26 45
17 575 21 35
MIN
CIRCUIT
AMPACITY
MAX.
FUSE
SIZE
(Amps)
TABLE 7: MOTOR OVERLOAD ELEMENTS
*
MOTOR HP VOLTAGE MODEL NUMBER
208 2MP04704600
5
230 2MP04704600
460 2MP04704900
575 2MP04705000
208 2MP04703700
7.5
230 2MP04704500
460 2MP04704300
575 2MP04704000
208 2MP04701600
10
230 2MP04704100
460 2MP04704200
575 2MP04704300
208 2MP04704400
15
230 2MP04701700
460 2MP04704500
575 2MP04704600
*.
These units are equipped from the factory with a correctly sized motor starter; overload elements are not
factory supplied. Three elements required per unit.
Unitary Products Group 19
035-18496-000-C-1102
TABLE 8: UNIT DRIVE DATA
UNIT MODEL
LA300
LB360
LB480 1LD0409 607 - 776 4.3 - 5.5 1 3/8 12.4 1 3/16 2 85.1 B84
LB600 1LD0411 692 - 833 4.8 - 6.0 1 3/8 12.4 1 3/16 2 78.6 B78
DRIVE KIT
MODEL
NUMBER
1LD0440 600 - 750 4.0 - 5.0 1 1/8 12.0 1 3/16 2 63.3 A62
1LD0407 700 - 850 4.2 - 5.2 1 3/8 11.0 1 3/16 2 63.3 A62
1LD0442 780 - 940 5.3 - 6.3 1 3/8 12.0 1 3/16 2 63.3 A62
1LD0415 636 - 795 4.0 - 5.0 1 3/8 11.0 1 3/16 2 63.3 A62
1LD0407 668 - 827 4.2 - 5.2 1 3/8 11.0 1 3/16 2 63.3 A62
1LD0408 827 - 986 5.3 - 6.3 1 3/8 11.0 1 3/16 2 59.7 A59
1LD0410 776 - 917 5.4 - 6.6 1 3/8 12.4 1 3/16 2 86.8 B85
1LD0412 762 - 931 5.4 - 6.6 1 5/8 12.4 1 3/16 2 76.8 B75
BLOWER
RPM
RANGE
ADJUSTABLEMOTOR PULLEY FIXED BLOWER PULLEY BELTS
PITCH DIA.
(IN.)
BORE
(IN.)
PITCH DIA.
(IN.)
BORE
(IN.)
QTY.
PITCH
LENGTH
(IN.)
TABLE 9: UNIT BLOWER MOTOR DATA
UNIT MODEL HP MOTOR KIT MODEL NUMBER FRAME SIZE
2LR04605023
LA300
LB360
LB480
LB600
7.5
5.0
7.5
10
7.5
10
10
15
5
2LR04605032 208/230/460
2LR04605158 575
2LP04607133
2LP04607158 575
2LR04605023
2LR04605032 208/230/460
2LR04605158 575
2LP04607133
2LP04607158 575
2LP04610133
2LP04610158 575
2LP04607133
2LP04607158 575
2LP04610133
2LP04610158 575
2LP04610133
2LP04610158 575
2LP04615133
2LP04615158 575
184
213
184
213
215
213
215
215
254
VOLTAGE
(3PH-60-HZ)
208/230/460
208/230/460
208/230/460
208/230/460
208/230/460
208/230/460
208/230/460
208/230/460
208/230/460
DESIGNATION
MAINTENANCE
Filters must be cleaned or replaced as often as necessary to
assure good airflow and filtering action.
To remove filters through the sides of the unit, remove either
the solid sidepanel on the piping end, or the larger side panel
on the end opposite the piping.
To remove the filters from the front of the unit, loosen 2
screws and raise the top filter retainer. The upper filters can
20 UnitaryProductsGroup
be lifted over the center filter lip. Three wing nuts are provided under the center filter retainer. Remove these and a
part of the center filter support, givingaccess to the bottom filters.
Drain pan(s) should be inspected regularly to assure proper
drainage.
The evaporator blower bearings and blower motor bearings
are permanently lubricated.
035-18496-000-C-1102
TABLE 10: FAN PEFORMANCE DATA - 25 TON
CFM
RPM
8,000 9,000 10,000 11,000 12,000
SP BHP kW SP BHP kW SP BHP kW SP BHP kW SP BHP kW
600 - - - 0.30 2.5 2.3 0.20 3.1 2.9 0.02 3.6 3.4 - - 635 0.56 2.4 2.3 0.43 2.7 2.6 0.31 3.3 3.1 0.13 3.8 3.5 - - 700 0.80 3.0 2.8 0.68 3.3 3.1 0.54 3.7 3.5 0.38 4.2 3.9 0.20 4.8 4.5
775 1.12 3.7 3.4 1.00 4.0 3.7 0.85 4.4 4.1 0.70 4.8 4.5 0.54 5.3 5.0
800 1.23 3.9 3.7 1.11 4.3 4.0 0.97 4.7 4.4 0.82 5.1 4.8 0.66 5.6 5.2
875 1.60 4.8 4.5 1.48 5.1 4.8 1.34 5.6 5.2 1.19 6.0 5.7 1.04 6.6 6.2
900 1.73 5.1 4.8 1.61 5.5 5.1 1.47 5.9 5.5 1.33 6.4 6.0 1.17 7.0 6.5
940 1.95 5.6 5.2 1.82 6.0 5.6 1.70 6.5 6.1 - - - - - -
TABLE11:FANPEFORMANCEDATA-30TON
CFM
RPM
600 0.38 2.8 2.4 0.23 3.3 2.9 0.06 3.9 3.4 - - - - - 635 0.52 3.1 2.7 0.37 3.7 3.2 0.21 4.3 3.7 0.03 4.9 4.2 - - 700 0.77 3.8 3.3 0.64 4.4 3.8 0.49 5.0 4.3 0.33 5.6 4.8 0.17 6.3 5.4
775 1.11 4.7 4.1 0.99 5.3 4.6 0.85 5.9 5.1 0.70 6.5 5.6 0.55 7.2 6.2
800 1.20 4.9 4.2 1.08 5.5 4.8 0.94 6.2 5.4 0.79 6.9 6.0 0.64 7.6 6.6
875 1.54 5.9 5.1 1.42 6.5 5.6 1.29 7.1 6.1 1.16 7.8 6.7 1.03 8.6 7.4
900 1.65 6.2 5.4 1.54 6.8 5.9 1.41 7.4 6.4 1.28 8.1 7.0 1.16 8.9 7.7
970 2.00 7.2 6.2 1.88 7.8 6.7 1.76 8.5 7.3 1.65 9.2 7.9 1.54 10.0 8.6
1000 2.15 7.6 6.6 2.03 8.2 7.1 1.92 8.8 7.6 1.81 9.5 8.2 1.71 10.4 9.0
10,000 11,000 12,000 13,000 14,000
SP BHP kW SP BHP kW SP BHP kW SP BHP kW SP BHP kW
TABLE 12: FAN PERFORMANCE DATA - 40 TON
CFM
RPM
600 0.84 6.0 5.2 0.63 7.2 6.2 0.40 8.4 7.2 0.13 9.7 8.4 - - 660 1.19 7.3 6.3 1.00 8.5 7.3 0.78 9.8 8.5 0.50 11.2 9.7 0.19 12.7 11.0
700 1.42 8.2 7.1 1.25 9.4 8.1 1.03 10.7 9.2 0.75 12.2 10.5 0.45 13.7 11.8
760 1.78 9.5 8.2 1.63 10.8 9.3 1.43 12.3 10.6 1.16 13.8 11.9 0.86 15.6 13.5
800 2.02 10.4 9.0 1.89 11.8 10.2 1.69 13.3 11.5 1.43 14.9 12.9 1.14 16.9 14.6
900 2.62 12.8 11.0 2.53 14.5 12.5 2.40 16.0 13.8 - - - - - 930 2.80 13.5 11.6 2.72 15.3 13.2 - - - - - - - - -
12,800 14,400 16,000 17,600 19,200
SP BHP kW SP BHP kW SP BHP kW SP BHP kW SP BHP kW
TABLE 13: FAN PERFORMANCE DATA - 50 TON
CFM
RPM
600 0.82 6.0 5.2 0.59 7.2 6.2 0.35 8.4 7.2 0.08 9.7 8.4 - - 660 1.17 7.3 6.3 0.96 8.5 7.3 0.73 9.8 8.5 0.45 11.2 9.7 0.14 12.7 11.0
700 1.40 8.2 7.1 1.21 9.4 8.1 0.98 10.7 9.2 0.70 12.2 10.5 0.40 13.7 11.8
760 1.76 9.5 8.2 1.59 10.8 9.3 1.38 12.3 10.6 1.11 13.8 11.9 0.81 15.6 13.5
800 2.00 10.4 9.0 1.85 11.8 10.2 1.64 13.3 11.5 1.38 14.9 12.9 1.09 16.9 14.6
900 2.60 12.8 11.0 2.49 14.5 12.5 2.35 16.0 13.8 - - - - - 930 2.78 13.5 11.6 2.68 15.3 13.2 - - - - - - - - -
16,000 18,000 20,000 22,000 24,000
SP BHP kW SP BHP kW SP BHP kW SP BHP kW SP BHP kW
Unitary Products Group 21
C
EVAPORATOR
COIL SECTION
035-18496-000-C-1102
7/8 KNOCKOUTS FOR POWER
AND CONTROL WIRING
AIR
OUT
M
K
L
AIR
OUT
5/8
5/8
K
AIR
J
BLOWER
IN
AIR
IN
SECTION
G
H
KNOCKOUT
FOR
LIQUID
PIPING
KNOCKOUT
FOR
SUCTION
PIPING
F
D
LESS
BOTTOM
E
{
PANEL
D
See detailed drawings for piping
KNOCKOUT
FOR
DRAIN
PIPING
B
A
5/8 PANEL
and drain connections
on following pages.
D
5/8 BOTTOM
PANEL
FIGURE 17 - UNIT DIMENSIONS - LA300, LB360, LB480
TABLE 14: UNIT DIMENSIONS - LA300, LB360, LB480
MODEL
LA300
LB360
LB480
A BCDEFGH J KLM
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
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
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 18 - 25 TON LIQUID LINE SOLENOID
WIRING
FIGURE 19 - 30, 40 & 50 TON LIQUID LINE
SOLENOID WIRING
22 UnitaryProductsGroup
035-18496-000-C-1102
SUCTION
LIQUID
SUCTION
SYS. #2
LIQUID
SYS. #1
LIQUID
SYS. #2
FIGURE 20 - LA300 PIPING CONNECTIONS
LIQUID (SYS. #1)
LIQUID (SYS. #2)
SUCTION
(SYS. #1)
SUCTION
(SYS. #2)
SYS. #1
FIGURE 22 - LB480 PIPING CONNECTIONS
TABLE 15: UNIT CONNECTION SIZES
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)
Connection Size
FIGURE 21 - LB360 PIPING CONNECTIONS
Unitary Products Group 23
035-18496-000-C-1102
FIGURE 23 - UNIT DIMENSIONS
Condensate
Drain
10.1"
23.86"
3.0"
Liquid
Line
Sys. #1
Liquid
Line
Sys. #2
3.0"
2.1"
6.7"
6.0"
4.7"
4.0"
3.8"
13.5"
24.0"
13.5"
SUCTION
LINE
SYS. #2
SUCTION
LINE
SYS. #1
FIGURE 24 - LB600 PIPING CONNECTIONS - END PANEL DETAIL
24 UnitaryProductsGroup
035-18496-000-C-1102
To check the supply air CFM after the initial balancing has been completed:
1. Drill two (2) 5/16-inch holes in the side panel as shown in
Figure 24.
2. Insert at least 8 inches of 1/4 inch tubing into each of
these holes for sufficient penetration into the airflow on
both sides of the evaporator coil.
3. Using an inclined manometer, determine the pressure
drop across a dry evaporator coil. Since the moisture on
an evaporator coil may vary greatly, measuring the pressure drop across the wet coil under field conditions
would be inaccurate. To assure a dry coil, the refrigerant
system should be de-activated while the test is being
run.
4. Knowing the pressure drop across a dry coil, the actual
CFM through the unit can be determinedfrom the curves
shown in Figures 25-28.
If the CFM is above or below the specified value, the supply
air motor pulley may have to be readjusted. After one hour of
operation, check the belt and pulleys for tightness and alignment.
After readings have been obtained, remove the tubes and
seal up the drilled holes in the side panel. 5/16 inch dot plugs
(P/N 029-12880) are available through normal York parts
ordering procedures.
25"
7"
5/16"
HOLE
EVAPORATOR
COIL
22
"
5/16"
HOLE
14"
FILTERS
COIL SECTION
FIGURE 25 - HOLE LOCATION FOR PRESSURE
DROP READING
Failure to properly adjust the total system air
quantity can result in extensive blower damage.
Unitary Products Group 25
25-ton
Pressure Drop Across Indoor Coil
1.00
0.90
0.80
0.70
0.60
0.50
I.W.C.
0.40
0.30
0.20
0.10
0.00
7000 8000 9000 10000 11000 12000 13000
035-18496-000-C-1102
CFM
FIGURE 26 - 25-TON PRESSURE DROP VS. CFM ACROSS INDOOR COIL
30-ton
Pressure Drop Across Indoor Coil
0.70
0.60
0.50
0.40
I.W.C.
0.30
0.20
0.10
0.00
9000 10000 11000 12000 13000 14000 15000
CFM
FIGURE 27 - 30-TON - PRESSURE DROP VS. CFM ACROSS INDOOR COIL
26 UnitaryProductsGroup
035-18496-000-C-1102
0.70
0.60
0.50
0.40
I.W.C.
0.30
0.20
0.10
0.00
40-ton
Pressure Drop A cross Indoor Coil
12000 14000 16000 18000 20000
CFM
FIGURE 28 - 40 TON - PRESSURE DROP VS. CFM ACROSS INDOOR COIL (DOMESTIC)
50-ton
Pressure Drop Across Indoor Coil
0.70
0.60
0.50
0.40
I.W.C.
0.30
0.20
0.10
0.00
15000 17000 19000 21000 23000 25000
CFM
FIGURE 29 - 50 TON - PRESSURE DROP VS. CFM ACROSS INDOOR COIL
Unitary Products Group 27
035-18496-000-C-1102
FIGURE 30 - INDOOR UNIT WIRING DIAGRAM LB360, 480 & 600
28 UnitaryProductsGroup
035-18496-000-C-1102
FIGURE 31 - INDOOR WIRING DIAGRAM LA300
Unitary Products Group 29
035-18496-000-C-1102
30 UnitaryProductsGroup
035-18496-000-C-1102
Unitary Products Group 31
Subject to change without notice. Printed in U.S.A. 035-18496-000-C-1102
Copyright © by Unitary Products Group 2002. All rights reserved. Supersedes: 035-18496-000-B-0302
Unitary 5005 Norman
Products York OK
Group Drive 73069
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