Luxaire KBU060A, KBC090A, KBC120A, KBBU060A06, KBBC090A33 Installation Instruction
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INSTALLATION
INSTRUCTION
MODELS K*BU060A, K*BC090A, & K*BC120A
AIR COOLED
SPLIT-SYSTEM AIR CONDITIONERS
Supersedes: 550.23-N2W (589) 550.23-N2Z (399)
035-16673
GENERAL
These completely assembled 5, 7-1/2 and 10 ton blower
units include a well insulated cabinet, a DX cooling coil with
copper tubes and aluminum fins, an expansion valve, a
distributor, throwaway filters, a centrifugal blower, a blower
motor contactor and a small holding charge of refrigerant-22.
Blower motors and adjustable drives are factory-installed on
all units.
The units are shipped in the vertical position ready for field
installation . For horizontal installation, re ver se the sol id
bottom panel and the return air duct flange on the front of
the unit.
INSPECTION
As soon as a unit is received, it should be inspected for
possibl e damage during tr an sit. If damage is evid en t, the
Installer should pay particular attention to the words:
tion easier.
damage may resu lt if installation procedure is not handled properly.
Cautions are given to prevent equipment damage. Warnings are given to alert installer that personal injury and / or equipment
NOTE, CAUTION
extent of th e damage should be noted o n the carrier’s freight
bill. A separate request for inspection by carrier’s agent
should be made in writing.
RENEWAL PARTS
Refer to Parts Manual for complete listing of replacement
parts on this equipment for complete listing of replacement
parts. The forms referenced in this instruction may be
ordered from:
Publications Distribution Center
Unitary Products Group
P.O. Box 1592, York, PA. 17405
This instruction covers the installation and operation of
evaporator blower units. For information on the operation of
the matching condensing unit, refer to Forms 550.46-N1W,
550.46-N2W and 55 0. 23- N 1W.
WARNING.
and
Notes are intended to clarify or make the installa-
550.23-N2Z
TABLE OF CONTENT
TABLES
General................................................................................1
Renewal Parts............. .. .......................................................1
Inspection............ .. ...............................................................1
INSTALLA TION
Limitations............................................................................3
Location...... ..........................................................................3
Clearances...........................................................................3
Rigging and Handling .......................................................... 4
Vertical / Horizontal Installation............................................ 4
Duct Conn ections................................................................. 4
Refrigerant Mains.................................................................5
Drain Connection.................. .. .. ...........................................6
Supply Air Blower Adjustment.............................................6
Power and Control Wiring .................................................. 11
MAINTENANCE
Filters ................................................................................. 12
Evaporator Coil .................................................................. 12
Drain Pan ........................................................................... 12
Lubrication ......................................................................... 12
Belts ................................................................................... 12
No. Description Page
1 Unit Application Data.................................. 3
2 Physical Data.............................. .............. .. 5
3 Blower Motor Pulley Adjustment ................ 7
4 Blower Performance ................................... 8
5 Accessory Static Resistance...................... 8
6 Blower Motor and Drive Data..................... 8
7 Electrical Data ............................................ 11
FIGURES
No. Description Page
1 Unit Suspension Mounting......................... 3
2 Vertical & Horizontal Application................ 4
3 Supply Air Duct Connection....................... 4
4 Electric Heater Accessory .......................... 5
5 Supply Air Plenum Accessor .................... 5
6 Base Accessory...................... .............. ...... 5
7 Return Air Grille Accessory........................ 5
8 Recommended Drain Piping ...... ................ 6
9 Motor Mounting Assembly.......................... 7
10 Hole Locations for Pressure Readings....... 7
11 Pressure Drop vs. S u p pl y Air CFM ......... .. . 7
12 Unit Dimensions & Clearances (5 tons)..... 9
13 Unit Dimensions & Clearances ................. 10
(7-1/2 & 10Tons)
14 Typical Field W iring............ .. .. .... .. .. .. .. .. .. .... . 11
NOMENCLATUR
K B
B
U 090
PRODUCT CATEGORY
K- Split-System Evap. Blower
W ith M o to r a n d D riv e
PRODUCT GENERATION
B - 2nd G eneration
C - 3rd G eneration
D - 4th G eneration
NOM INAL
COOLING CAPACITY
PR O DUC T ID EN TIFIER
060 - 5 TO N
BU - E vap. B low er (5 Ton)
B C - E v a p . B lo w e r (7 -1 /2 & 1 0 T o n
2 Unitary Products Group
090 - 7-1/2 TO N
120 - 10 TO N
A
3 3
VOLTAGE CO D E
06 - 208/230-1-60
33 - 208/230/460-3-60
FAC TO R Y
INSTALLED HEAT
A - N ot A pplicable
INSTALLATION
550.23-N2Z
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 ad ded to a unit to meet local codes,
they are to be inst al led at the dea ler ’s and/or the customer’s
expense. See Table 1 for application limitations.
LOCATION
These Evaporator Blowers are not designed for outdoor
installation. They must be located within the building
structure, either inside or ou tside the conditioned space .
These Evaporator Blower sections allow for vertical or
horizontal installa t io n in any area offering proper electrical
The units should be located as c los e to th e con de ns i ng units
as practical and positioned to minimize bends in the
refrigerant piping.
Units being installed vertically or horizontally can be set
directly o n a floor or platform, or metal o r wooden beams
can support them.
Units being installed hori z on ta lly can be suspended from
above. Four 3/8" weld nuts are provided in the unit frame to
accommodate hang er ro d s. Knockouts must be removed
from the unit panels to expose these weld nuts. Refer to
Figure 1 for t he ir location and the in di vi dual load on each
hanger rod.
WARNING: Be careful when attaching the hanger rods. They
must not be allowe d to turn or slip.
supply, duct and drai n connections.
CLEARANCES
They may be installed either with ductwork or matching
plenum and inlet grille.
TABLE 1
KBBU060A06 208/230-1-60 187 252 1600 2400 65/57 95/72 40 77
KBBC090A33
KBBC120A33
* Utilization Range "A" in accordance with ARI Standard 110
- UNIT APPLICATION DAT
Model
Power
Supply
208/230-3-60
460-3-60
208/230-3-60
460-3-60
Voltage
Variation
Supply Air
CFM
Min. Max. Min. Max. Min. Max. Min. Max.
187
252
432
187
432
2400 3600 65/57 95/72 40 77
504
252
3200 4800 65/57 95/72 40 77
504
Refer to the unit dimension details, Figures 12 and 13 for
clearances required for servicing and for proper unit
operation.
Entering Air Temperatures, °F
Cooling Coil - db/wb Heating Coil - db
2-5/8
W3
A
W2
B
SUPPLY AIR PLENUM AND
ELECTRIC HEATER ACCESSO RIES
IN S T A L L E D O N T H IS E N D O F T H E
UNIT.
37-9/16 (KEU060)
44-7/8 (KEU090, 120)
W4
AIR
OUT
Model
(4) 3/8"-16
W ELD NUUTS
34-1/2 (KEU060)
1-1/4 (KE U060)
1-3/8 (KE U090, 120)
AIR
IN
RETURN AIR GRILLE, HOT WATER
COIL AND STEAM COIL
ACCESSORIES INSTALLED ON
ON THIS END OF THE UNIT.
49-1/4 (KEU090, 120)
W1
CENTER
O F G R A V IT Y
Center of Gravity Dimensions (in.) Weight Distri bu tion (Lbs.)
A B W1 W2 W3 W4 TOTAL
KBU060 22-3/8 15-1/4 60 65 40 45 210
KBC090 26-1/4 23-3/4 85 93 70 77 325
KBC120 26-5/8 24-1/8 85 95 70 80 330
FIG. 1
- UNIT SUSPENSION MOUNTING (Horizontal Application)
Unitary Products Group 3
550.23-N2Z
RIGGING AND HANDLING
Be careful when moving the unit. Do not remove any
packaging until the unit is near its final location.
The packaging consists of a bottom wooden skid that can be
lifted with a fork truck from any direction, a corrugated
container that covers the entire unit, and strapping that
secures the container to the skid.
These units can be rigged with slings under the bottom skid
CAUTI ON: Spre ader bars should be used to pre vent the slings
from crushing the unit panels and frame.
Before rigging any unit, determine its weight from Table 2.
Before rigging a unit for horizontal installation, determine its
center of gravity from Figure 1, and make sure that its weight
will be distributed equally.
VERTICAL/HORIZONTAL INSTALL ATIO N
These evaporator blowers are shipped for vertical installation
with vertical air discharge as shown in Figure 2(A) but may
be conv erted for horiz on ta l insta ll at io n as sh own in Figure
2(B) by i nte rchanging the so l id bo ttom panel and the retu r
air duct flange.
DUCT CONNECTIONS
Design and install all ducts in accordance with all national
and/or local codes.
Refer to Figure 3 for suggested method of connecting supply
air ductwork.
Ducts should be sized no smaller than the duct fl a nges on
the unit or the electric heater (if used). Refer to the unit
dimension details (Fig ure 12 and 13) and th e heater detail
(Figure 4) for theses sizes. Refer to Form 550.12-N10.1U for
installation instructions on the electric heater.
Use flexible fiber glass or plastic cloth collars or other
non-flammable material at the unit duct connections to
minimize the transmission of noise and vibration.
Insulate all ductwork runn ing through un condi t ioned a reas to
prevent moisture condensation and to provide more
economical operation.
The return air duct flange is factory-mounted on the front of
the unit, but it can be reversed with the solid bottom panel for
horizontal applications. When the return air grille is us ed,
the duct connection frame is not used.
NOTE: If return air duct is not used, applicable installation
codes may limit the unit to installation only in a single
story residence.
A supply air plenum (Figure 5), a base (Figure 6), and a
return air grille (Figure 7) are available as field-installed
accessories, and one of the following respective instruction
forms will be packed with each.
• 550.13-N10.2U - Supply Air Plenum
• 550.13-N10.3U - Return Air Grille
• 550.12-N10.4U - Base
The supply air plenum and the return air grille should be
used in lieu of ductwork only when a free blow/free return
application is practical.
RETURN AIR
DUCT FLANGE
RETURN AIR
DUCT FLANGE
AIR
IN
COIL
BLOW ER
AIR
IN
AIR
OUT
(A )
SOLID
BOTTOM PAN EL
BLOW ER M OTOR
LO C A TIO N
(B )
VERTICAL
POSITION
BLOW ER M OTOR
LO C A TIO N
COIL
SOLID
BOTTOM PAN EL
HORIZONTAL
POSITION
BLOW ER
AIR
OUT
REFRIGERANT MAINS
Many service problems can be avoided by taking adequate
precautions to provide an internally clean and dry system
and by using procedures and materials that conform with
established standards.
NO N-FLAMM ABLE
C O LLA R
SUPPLY AIR
DUCT FLANGE
AIR
OUT
DUCT
FLANGED DUCT
CONNECTIO N
(F IE L D
FABRIC ATED)
BLOW ER G ASKET
(BY IN STALLER)
FIG. 2
- VERTICAL AND HORIZONTAL APPLICATION
4 Unitary Products Group
FIG. 3
- SUPPLY AIR DUCT CONNECTION
550.23-N2Z
TABLE 2
EVAPORATOR COIL
CENTRIFUGAL BLOWER
(Forward Curve)
MOTORS
FIL TERS
(Throwaway)
DISTRIBUTOR One Per Unit 4-3-6-1
OPERATING
Weight, Lbs.
HOT WATER COIL
STEAM COIL
ELECTRIC HEAT
SHIPPING VOLUME - Cubic Feet (B a s i c Unit) 30 53 53
1
Refer to Blower Motor and Drive Data for additional blower motor and drive information.
2
The first digit refers to inlet diameter (1/8"), second digit refers to tube diameter (1/16") and the third digit re fers to number of tubes and the
fourth digit refers to number of distributors.
3
Refer to the unit installation instruction f o r the distributed weight of the evaporator blower unit:
Form 550.23-N1W (060, 090 and 120)
- PHYSICAL DAT
DESCRIPTION
Rows Deep x Rows Wide 3 x 24 3 x 27 3 x 32
Finned Length - inches 30 46 46
Face Area - square feet 5.0 8.6 10.2
Tube OD - inches 3/8 3/8 3/8
Fins per inch 13 13 13
Diameter x Width - inches 10 x 10 15 x 15 15 x 15
1
3
Nominal HP Rating 3/4 1-1/2 2
Quantity Per Unit 16" x 25" x 1" 2 4 4
Face Area - square feet 5.6 11.1 11.1
Basic Unit 210 325 330
Accessories
Tubes OD, inches 1/2 (Copper)
Rows Deep 2
Fins Per Inch 12 (Aluminum)
Face Area, square feet 3.6 6.8 6.8
Connections (Supply & Return) 1" NPTE
Outer Tube OD, inches 1 (Brass)
Rows Deep 1
Fins Per Inch 8 (Aluminum)
Face Area - square feet 3.7 6.6 6.6
Connection
Heater
Elements
Face Area, square feet 3.0
UNIT MODEL
060 090 120
2
Supply Air Plenum 90 102 102
Return Air Grille 12 15 15
Hot Water Coil 56 82 82
Steam Coil 57 85 85
Base 45 60 60
Electric Heat: 10 K 60 63 63
16 K 64 66 66
26 K 68 71 71
36 K - 74 74
Inlet 1-1/2" NPTE
Outlet 1-1/2" NPTE
% Nickel 59.2
%Chromium 16.0
Watt Density,
watts/sq. in.
5-3-10-1
59.0
2
5-3-12-1
2
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 with one exception. Use short radius ells for traps
in all vertical suction risers. If soft copper must be used,
avoid s ha rp bends, wh ic h may cause a restriction.
Fiberglass insulation and a sealing material such as
permagum should be pack ed aro u n d refrigerant lines where
they penetrate a wall to reduce vibration and to retain some
flexibility.
Support all refrigerant lines at minimum intervals with
suitable hangers, brackets or clamps. Braze all
Neve r br a z e or solder the li qu id and suction lines togeth er.
The complete suction line should be insulated with no less
than 1/2" ARMAFLEX or equi va lent. If the liquid and suction
lines are to be taped together for support purposes, they
must be completely insulated from one another.
INSTALLING REFRIGERANT MAINS
The units are evacuated and dehy dr at ed at the factory and
shipped with a holding charge of Refrigerant-22. The suction
and liquid connections are sealed with copper discs. Refer
to the appropriate condensing unit installation instructions for
charging da ta.
copper-to-copper joints with Sil-Fos 5 or equivalent brazing
material. Do not use soft solder.
Unitary Products Group 5
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