Unitary products group KBU060 User manual

CONTENTS
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 3
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
See the following page for a complete Table of Contents.
NOTES, CAUTIONS AND WARNINGS
Installer should pay particular attention to the words:
NOTE, CAUTION, and WARNING. Notes are intended to
clarify or make the installation easier. Cautions are given
to prevent equipment damage. Warnings are given to
alert installer that personal injury and/or equipment dam-
age may result if installation procedure is not handled
properly.
INSTALLATION
MANUAL
CAUTION: READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
(AIR COOLED)
SPLIT-SYSTEM
AIR CONDITIONERS
MODELS: KBU060, KBC090, 120 & 180
292427-BIM-A-0307

292427-BIM-A-0307
2Unitary Products Group
TABLE OF CONTENTS
NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . 3
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . 3
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
RIGGING AND HANDLING . . . . . . . . . . . . . . . . . . . . . . . 5
CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
VERTICAL AND HORIZONTAL INSTALLATION -
KBU060, KBC090 AND 120 . . . . . . . . . . . . . . . . . . . . . . . 7
VERTICAL AND HORIZONTAL INSTALLATION -
KBC180 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
DUCT CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . .8
DRAIN CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . .10
REFRIGERANT MAINS . . . . . . . . . . . . . . . . . . . . . . . . .10
INSTALLING REFRIGERANT MAINS . . . . . . . . . . . . .10
EXPANSION VALVE BULB . . . . . . . . . . . . . . . . . . . . .11
POWER AND CONTROL WIRING . . . . . . . . . . . . . . . . .13
POWER WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
CONTROL WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
SUPPLY AIR BLOWER ADJUSTMENT . . . . . . . . . . . . .15
ACCESSORIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
EVAPORATOR COIL . . . . . . . . . . . . . . . . . . . . . . . . . . .26
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
DRAIN PAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
BELTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
LIST OF FIGURES
Fig. # Pg. #
1 SUSPENSION MOUNTING (HORIZONTAL) -
KBU060, KBC090 AND 120 . . . . . . . . . . . . . . . . . . . .5
2 SUSPENSION ACCESSORY (HORIZONTAL) -
KBC180 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3 VERTICAL AND HORIZONTAL APPLICATION
KBU060, KBC090 AND 120 . . . . . . . . . . . . . . . . . . . .7
4 VERTICAL AND HORIZONTAL APPLICATION
KBC180 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
5 SUPPLY AIR DUCT CONNECTIONS . . . . . . . . . . . . .8
6 ELECTRIC HEAT ACCESSORY . . . . . . . . . . . . . . . .9
7 SUPPLY AIR PLENUM ACCESSORY . . . . . . . . . . . .9
8 BASE ACCESSORY . . . . . . . . . . . . . . . . . . . . . . . . . .9
9 RETURN AIR GRILL ACCESSORY . . . . . . . . . . . . . .9
Fig. # Pg. #
10 RECOMMENDED DRAIN PIPING . . . . . . . . . . . . . . 10
11 TYPICAL FIELD WIRING DIAGRAM KBU060,
KBC090 AND 120 . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
12 TYPICAL FIELD WIRING DIAGRAM KBC180 . . . . . 12
13 TYPICAL MOTOR MOUNTING ASSEMBLY . . . . . . 16
14 HOLE LOCATIONS (PRESSURE DROP
READINGS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
15 PRESSURE DROP ACROSS A DRY EVAPORATOR
COIL VS. SUPPLY AIR CFM . . . . . . . . . . . . . . . . . . 17
16 UNIT DIMENSIONS KBU060 . . . . . . . . . . . . . . . . . . 23
17 UNIT DIMENSIONS KBC090 & 120 . . . . . . . . . . . . . 24
18 UNIT DIMENSIONS KBC180 . . . . . . . . . . . . . . . . . . 25
LIST OF TABLES
Tbl. # Pg. #
1 KBU, KBC PHYSICAL DATA . . . . . . . . . . . . . . . . . . . 4
2 UNIT VOLTAGE LIMITATIONS . . . . . . . . . . . . . . . . . 4
3 UNIT SUPPLY AIR LIMITATIONS . . . . . . . . . . . . . . . 4
4 UNIT TEMPERATURE LIMITATIONS . . . . . . . . . . . . 4
5 UNIT SUSPENSION MOUNTING (HORIZONTAL
APPLICATION) WEIGHTS . . . . . . . . . . . . . . . . . . . . . 6
6 KBU, KBC OPERATING WEIGHTS (LBS.) . . . . . . . . 6
7 KBU, KBC ELECTRICAL DATA . . . . . . . . . . . . . . . . 14
8 SUPPLY AIR BLOWER MOTOR PULLEY
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
9 BLOWER MOTOR AND DRIVE DATA . . . . . . . . . . . 17
10 KBU060 (5 TON) BELT DRIVE BLOWER
PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
11 KBC090 (7.5 TON) BELT DRIVE BLOWER
PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
12 KBC120 (10 TON) BELT DRIVE BLOWER
PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
13 KBC180 (15 TON) BELT DRIVE BLOWER
PERFORMANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
14 KBU060-KBC090-120 STATIC RESISTANCE FOR
UNIT ACCESSORIES (IWG) . . . . . . . . . . . . . . . . . . 22
15 KBC180 STATIC RESISTANCE FOR UNIT
ACCESSORIES (IWG) . . . . . . . . . . . . . . . . . . . . . . . 22
16 UNIT CLEARANCES KBU060 . . . . . . . . . . . . . . . . . 23
17 UNIT CLEARANCES KBC090 & 120 . . . . . . . . . . . . 24
18 UNIT CLEARANCES KBC180 . . . . . . . . . . . . . . . . . 25

292427-BIM-A-0307
Unitary Products Group 3
NOMENCLATURE
GENERAL
These completely assembled 5, 7-1/2, 10 and 15 ton blower
units include a well insulated cabinet, a DX cooling coil with
copper tubes and aluminum fins, an expansion valve, a dis-
tributor, 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, reverse the solid bot-
tom panel and the return air duct flange on the front of the
unit.
This instruction covers the installation and operation of evap-
orator blower units. For refrigerant piping installation instruc-
tions refer to document “Application Data - General Piping
Recommendations 247077 for Split System Air Conditioning
and Heat Pumps”.
SAFETY CONSIDERATIONS
Installer should pay particular attention to the words: NOTE,
CAUTION, and WARNING. Notes are intended to clarify or
make the installation easier. Cautions are given to prevent
equipment damage. Warnings are given to alert installer that
personal injury and/or equipment damage may result if instal-
lation procedure is not handled properly.
RENEWAL PARTS
Contact your local UPG parts distribution center for autho-
rized replacement parts for this equipment.
INSPECTION
As soon as a unit is received, it should be inspected for possi-
ble 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.
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Improper installation may create a condition where
the operation of the product could cause personal
injury or property damage.
Improper installation, adjustment, alteration, service
or maintenance can cause injury or property dam-
age. Refer to this manual for assistance or addi-
tional information, consult a qualified installer or
service agency.
This product must be installed in strict compliance
with the enclosed installation instructions and any
applicable local, state, and national codes including
but not limited to, building, electrical and mechanical
codes.

292427-BIM-A-0307
4Unitary Products Group
TABLE 1: KBU, KBC PHYSICAL DATA
Component Description Model
060 090 120 180
EVAPORATOR
BLOWER1Centrifugal Blower (Dia. X Wd. in.) 15 X 15 15 X 15 15 X 15 18 X 18
Fan Motor HP (Belt Drive) 3/4 1-1/2 2 3
EVAPORATOR
COIL
Rows Deep 3 3 3 3
Finned Length (in.) 30 46 46 54
Fins per Inch 13 13 13 13
Face Area (ft.2) 5.0 8.6 10.2 12.1
HOT WATER COIL
Rows Deep 2 2 2 2
Finned Length (in.) 30 46 46 54
Fins Per Inch 12 12 12 12
Face Area (ft.2) 3.8 5.4 5.4 9.0
Inlet Connection 1” NPTE 1” NPTE 1” NPTE 1-3/8” O.D
Outlet Connection 1” NPTE 1” NPTE 1” NPTE 1-3/8” O.D
STEAM COIL
Rows Deep 1 1 1 1
Finned Length (in.) 30 46 46 54
Fins Per Inch 8 8 8 8
Face Area (ft.2) 3.8 5.4 5.4 9.0
Inlet Connection 1-1/2” NPTE 1-1/2” NPTE 1-1/2” NPTE 1-1/2” NPTE
Outlet Connection 1-1/2” NPTE 1-1/2” NPTE 1-1/2” NPTE 1-1/2” NPTE
AIR FILTERS Quantity Per Unit (16” X 25” X 1”) 2 4 4 0 Quantity Per Unit (20” X 20” X 1”) 0 0 0 6
Total Face Area (ft.2) 5.6 11.1 11.1 16.7
HOLDING CHARGE Refrigerant 22 (lbs./oz.) 0/7 0/7 0/10 0/0
1. Refer to Blower Motor and Drive Data table for additional blower and drive information.
All of these 1750 RPM motors are solid base, 56 frame with 1.15 service factor, inherent protection and permanently lubricated ball bearings.
TABLE 2: UNIT VOLTAGE LIMITATIONS
Power Rating1
1. Utilization Range “A” in accordance with ARI Standard
110.
Minimum Maximum
208/230-1-602
2. 5 Ton unit only.
187 252
208/230-3-60 187 252
460-3-60 432 504
575-3-60 540 630
TABLE 3: UNIT SUPPLY AIR LIMITATIONS
Unit Minimum Maximum
K*BU060 1500 2500
K*BC090 2250 3750
K*BC120 3000 5000
K*BC180 4500 7500
TABLE 4: UNIT TEMPERATURE LIMITATIONS
Temperature Minimum Maximum
Wet Bulb Temperature (°F)
of Air on Evaporator Coil 57 72
Dry Bulb Temperature (°F)
of Air on Heating Coil 40 77

292427-BIM-A-0307
Unitary Products Group 5
INSTALLATION
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 compo-
nents 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 Tables 2, 3 and 4 for application limitations.
LOCATION
These Evaporator Blowers are not designed for outdoor
installation. They must be located within the building struc-
ture, either inside or outside the conditioned space.
These Evaporator Blower sections allow for vertical or hori-
zontal installation in any area offering proper electrical supply,
duct and drain connections.
They may be installed either with ductwork or matching ple-
num and inlet grill.
The units should be located as close to the condensing units
as practical and positioned to minimize bends in the refriger-
ant piping.
Units being installed vertically or horizontally can be set
directly on a floor or platform, or metal or wooden beams can
support them.
KBU060, KBC090 & 120 units being installed horizontally can
be suspended from above. Four 3/8" weld nuts are provided
in the unit frame to accommodate hanger rods. Knockouts
must be removed from the unit panels to expose these weld
nuts. Refer to Figure 1 for their location and Table 5 for the
individual load on each hanger rod.
KBC180 units being installed horizontally can be suspended
from above as shown in Figure 2. Refer to From 035-16622-
001-A-0202 for more information on the installation of the
suspension accessory and for the individual load on each
hanger rod.
RIGGING AND HANDLING
Be careful when moving the unit. Do not remove any packag-
ing 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 con-
tainer 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.
Before rigging any unit, determine its weight from Table 5.
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.
Be careful when attaching the hanger rods. They
must not be allowed to turn or slip.
Spreader bars should be used to prevent the slings
from crushing the unit panels and frame.
FIGURE 1 - SUSPENSION MOUNTING (HORIZONTAL) - KBU060, KBC090 AND 120
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292427-BIM-A-0307
6Unitary Products Group
TABLE 5: UNIT SUSPENSION MOUNTING (HORIZONTAL APPLICATION) WEIGHTS
Unit Model Shipping Weight
(lb)
Operating
Weight
(lb)
CG (in) 4-Point Loading (lb)
X Y ABCD
K*BU060 225 210 22.50 15.00 47 51 58 53
K*BC090 340 235 26.50 24.00 78 84 84 78
K*BC120 370 355 26.50 24.00 86 92 92 86
K*BC180 440 425 26.50 24.00 104 77 104 141
TABLE 6: KBU, KBC OPERATING WEIGHTS (LBS.)
MODEL 060 090 120 180
BASIC UNIT (Cooling Only) 210 325 325 425
ACCESSORIES
Base 45 55 55 65
Return Air Grill 10 15 15 20
Supply Air Plenum 90 100 100 115
Hot Water Coil 70 105 105 135
Steam Coil 80 115 115 145
Electric Heater
10 KW 66
16 KW 70
26 KW 74
36 KW 77
72 KW 125
FIGURE 2 - SUSPENSION ACCESSORY (HORIZONTAL) - KBC180
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292427-BIM-A-0307
Unitary Products Group 7
CLEARANCES
Refer to the unit dimension details, Figures 13, 14 and 16 for
clearances required for servicing and for proper unit opera-
tion.
VERTICAL AND HORIZONTAL INSTALLATION -
KBU060, KBC090 AND 120
These units are built in a single cabinet with two condensate
drain pans. This allows the units to be installed in either the
vertical or horizontal position for maximum flexibility.
On vertical applications, the air velocity the cooling coil keeps
the condensate from dripping off the finned surface onto the
filters.
On horizontal applications, the unit must be installed with the
condensate drain pan under the entire cooling coil.
• The Supply Air Plenum and the Return Air Grill accesso-
ries can be used on either arrangement.
• The Base accessory can only be used on the vertical
arrangement.
Units installed horizontally are designed for ceiling suspen-
sion. Four 3/8”-16 weld nuts are provided in the angle sup-
ports on the front of the unit (the side with the logo).
Knockouts are provided in the exterior panels for access to
these weld nuts. The hanger rods must be supplied in the
field.
VERTICAL AND HORIZONTAL INSTALLATION -
KBC180
This unit has two distinct modules a blower module and a coil
module. Although the unit is always shipped in the vertical
position with a vertical air discharge as shown in illustration
(a), the blower module can be repositioned in the field as
shown in illustrations (b) and (c) for maximum flexibility.
• The Supply Air Plenum, Return Air Grill and Base acces-
sories can be applied on arrangement (a).
• The Return Air Grill and Base accessories can be
applied on arrangement (b).
• The Supply Air Plenum, Return Air Grill and Suspension
accessories can be applied on arrangement (c).
The blower can be repositioned per the following instructions:
1. Remove the panels from the blower section.
2. Remove the four Phillips machine bolts that hold the coil
and blower sections together. A bolt is located near
each corner.
3. Move the blower section to the proper location.
4. Attach the blower section to the coil section with the
machine bolts removed in Step 2.
5. Before replacing the panel, see Duct Connection and
Drain Connection.
6. Replace the panels.
FIGURE 3 - VERTICAL AND HORIZONTAL
APPLICATION KBU060, KBC090 AND
120
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292427-BIM-A-0307
8Unitary Products Group
DUCT CONNECTIONS
Design and install all ducts in accordance with all national
and/or local codes.
Refer to Figure 5 for suggested method of connecting supply
air ductwork.
Ducts should be sized no smaller than the duct flanges on the
unit or the electric heater (if used). Refer to the unit dimen-
sion details (Figure 16) and the heater detail (Figure 6) for
these sizes. Refer to Form 131002 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 running through unconditioned areas to
prevent moisture condensation and to provide more econom-
ical 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 grill is used, 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 sin-
gle story residence.
A supply air plenum (Figure 7), a base (Figure 8), and a
return air grill (Figure 9) are available as field-installed acces-
sories, and one of the following respective instruction forms
will be packed with each.
035-16650-001 - Supply Air Plenum
035-16621-001 - Return Air Grill
035-16632-001 - Base
The supply air plenum and the return air grill should be used
in lieu of ductwork only when a free blow/free return applica-
tion is practical.
FIGURE 4 - VERTICAL AND HORIZONTAL APPLICATION KBC180
9(57,&$/326,7,21 +25,=217$/326,7,21
FIGURE 5 - SUPPLY AIR DUCT CONNECTIONS
AIR
OUT
NON-FLAMMABLE
COLLAR
FLANGEDDUCT
CONNECTION
(FIELD
FABRICATED)
DUCT
SUPPLYAIR
DUCTFLANGE
BLOWERGASKET
(BYINSTALLER)


292427-BIM-A-0307
Unitary Products Group 9
FIGURE 6 - ELECTRIC HEAT ACCESSORY
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DIMENSIONS 5 TON 7.5, 10 & 15 TON
A 16-7/8 19-1/4
B 20-1/8 22-1/4
FIGURE 7 - SUPPLY AIR PLENUM ACCESSORY
ALTERNATE
AIR DISCHARGE
BLOWER
UNIT
SUPPLY
AIR
TOP
PANEL
GRILLE
VERTICAL
ARRANGEMENT
SHOWN
Plenum should be field mounted on the supply air end of blower
units for either vertical or horizontal application. For rear discharge,
rotate plenum 180 degrees. For horizontal discharge on a horizontal
unit, the grille panel and the top panel will be arranged differently.
Refer to Form for installation and assembly instructions.
035-16650-001
FIGURE 8 - BASE ACCESSORY
FIGURE 9 - RETURN AIR GRILL ACCESSORY
BLOWER
UNIT
BLOWER UNIT
BASE PANEL
FOR VERTICAL
ARRANGEMENT
ONLY
WHEN OUTDOOR AIR IS REQUIRED, A HOLE CAN BE
CUT IN BACK PANEL FOR CONNECTING DUCTWORK.
VERTICAL
ARRANGEMENT
SHOWN

292427-BIM-A-0307
10 Unitary Products Group
DRAIN CONNECTION
The drain line must be trapped because the coil is located on
the negative side of the supply air blower. It must be pro-
tected from freezing temperatures.
A 7/8" O.D. drain connection extends through right hand side
of cabinet. Refer to Figure 10 for recommended drain piping.
The drain connection is located on the same side of the unit
as the refrigerant connections. The line should be insulated
where moisture dripping will be objectionable or cause dam-
age to the area.
The 3" dimension must equal or exceed the negative static
pressure developed by the supply air blower. If it does not,
the condensate will not drain properly and may overflow the
drain pan. The trap must be at least 2-1/2" deep to maintain
a water seal under all operating conditions, especially during
blower start-up.
NOTE: The unit may have to be raised off the floor to allow
enough height for the drain trap.
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 estab-
lished standards.
Hard drawn copper tubing should be used where no appre-
ciable 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 sharp
bends, which may cause a restriction.
Fiberglass insulation and a sealing material such as perma-
gum should be packed around refrigerant lines where they
penetrate a wall to reduce vibration and to retain some flexi-
bility.
Support all refrigerant lines at minimum intervals with suitable
hangers, brackets or clamps. Braze all copper-to-copper
joints with Sil-Fos 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 1/2" ARMAFLEX or equivalent. 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 blower units are shipped with the coil section side panels
suitable for right hand piping connections when viewed from
the return air side of the unit.
In left hand piping is required, the two panels on the right side
of the coil section can be interchanged with the single panel
on the left side of the coil section.
When left-hand piping connections are installed, the suction
line must be insulated to prevent moisture from condensing
and being carried into the blower section.
The liquid and suction connections must be piped outside the
unit. Refer to the unit drawing for locations and the dimen-
sions of these connections.
Before brazing the refrigerant lines to these connections,
remove the short panel from the unit frame and slide it (along
with the grommets) onto the refrigerant lines. After the
brazed joints have cooled, slide the panel back into place and
secure it to the unit frame.
The blower units are shipped with the coil section side panels
suitable for right hand piping connections when viewed from
the return air side of the unit.
In left hand piping is required, the two panels on the right side
of the coil section can be interchanged with the single panel
on the left side of the coil section.
When left-hand piping connections are installed, the suction
line must be insulated to prevent moisture from condensing
and being carried into the blower section.
NOTE: These units can only be piped from one side of the
unit.
FIGURE 10 - RECOMMENDED DRAIN PIPING







 







Dry nitrogen should flow through the system at all
times when heat is being applied and until the joint
has cooled.

292427-BIM-A-0307
Unitary Products Group 11
EXPANSION VALVE BULB
The expansion valve bulb must be fastened in a 4 o'clock
position to the horizontal suction line outside the cabinet after
the piping connections have been made.
On KBC120 units, fasten the expansion valve bulb on the
suction header Use the clamps provided with the valve to
secure the bulb in position. Bulb must be insulated with arma-
flex or mastic to assure proper operation.
FIGURE 11 - TYPICAL FIELD WIRING DIAGRAM KBU060, KBC090 AND 120
R
B
Y
O
W
X
53
G
60
66
R
B
Y
O
W
X
53
G
60
66
R
Y
G
R
Y
G
V
T
C
O
O
TERMINALS ON
1ST STAGE
COOLING
THERMOSTAT
TERMINALS ON
1ST STAGE
COOLING
THERMOSTAT
TERMINALS ON SUPPLY AIR
BLOWER MOTOR CONTACTOR 10M
TERMINALS ON SUPPLY AIR
BLOWER MOTOR CONTACTOR 10M
1-PHASE LINE VOLTAGE
POWER SUPPLY
3-PHASE LINE VOLTAGE
POWER SUPPLY
POWER WIRING DISCONNECT
SWITCH AND FUSING TO BE
SUPPLIED BY FIELD
POWER WIRING DISCONNECT
SWITCH AND FUSING TO BE
SUPPLIED BY FIELD
TERMINALS ON
COMPRESSOR
CONTACTOR 1 M
OF CONDENSING UNIT
TERMINALS ON
COMPRESSOR
CONTACTOR 3TB
OF CONDENSING UNIT
1- PHASE
KEU060
3- PHASE
KEU090 and 120
24-VOLT
CONTROL
WIRING
24-VOLT
CONTROL
WIRING
24-VOLT
CONTROL
WIRING
24-VOLT
CONTROL
WIRING
WIRE IN ACCORDANCE WITH LOCAL
AND NATIONAL ELECTRICAL CODES
The field wiring connected to dummy
terminals R and Y on 4TB can be
routed directly from the condensing
unit to the thermostat if desired.
NOTE: USE COPPER
CONDUCTORS ONLY

292427-BIM-A-0307
12 Unitary Products Group
FIGURE 12 - TYPICAL FIELD WIRING DIAGRAM KBC180
RCW1 Y1 Y2 G
C
G
W1 W2
G1
Sol
POS1
LIMIT
SD
C
FAN OVER
LOW AMB
SD
SD
Y1
Y2
C
LPS1
HPS1
C2
LPS2
HPS2
Y1-ECON
Y1-OUT
C1
R
24/120 VAC
OUTPUTS
R
PO 1 PO 2
THERMOSTAT OUTDOOR
INDOOR
SPLIT SYSTEM CONNECTION
DIAGRAM
W2 X
X
G
Sol
TB3

292427-BIM-A-0307
Unitary Products Group 13
POWER AND CONTROL WIRING
Install electrical wiring in accordance with the latest National
Electrical Code (NFPA Standard No. 70 and/or local regula-
tions). The unit must be grounded in accordance with these
codes.
POWER WIRING
Remove the knockout from the units rear panel (7/8" for
KBU060 and KBC180, 1-3/8" for KBC090, and 120) for power
wiring conduit through this opening. Connect the conduit to
the required field-supplied fitting and the power wiring to
blower motor contactor 10M in unit control box.
If the unit includes an electric heat accessory, route the
power wires into heater control box in lieu of the unit. Refer
to electric heat instruction 131002 for additional installation
information.
CONTROL WIRING
Route the low voltage control wiring through the 7/8" hole
(with bushing) in the units rear panel. Add a 1/2" conduit fit-
ting to the 7/8" hole in the unit control box, route control wiring
through this opening and connect them to the terminals on
block 4TB.
Blower unit Model KBU060 contains a low voltage control
transformer (1T), which supplies the 24-volt control voltage
for its operation and for the operation of the condensing unit.
CONTROL WIRE SIZING
To determine the total circuit length, add the follow-
ing distances:
1 - Outdoor Unit to Indoor Unit _____________
2 - Indoor Unit to Thermostat _____________
3 - Thermostat to Indoor Unit _____________
4 - Indoor Unit to Outdoor Unit _____________
5 - Outdoor Unit to Elec. Heater _____________
Total Circuit Length _____________
Refer to Figures 16, 17 & 18 for location of power and control
wiring openings in rear panel of the units. Refer to Figure 11
for typical field wiring. Refer to Table 7 to size the disconnect
switch, the power wiring and the fuses.
NOTE: Three phase motor rotations may be incorrect when
unit is first started. Reverse phase (leads L1 and L2)
at blower motor contactor to obtain correct rotation.
To prevent possible interconnection between 24-volt
circuits, the condensing unit being used with Model
KBU060 blower unit must NOT contain its own 24-
volt power supply.
Wire Size Maximum Total Circuit
Length (Feet)
#19 Solid
#18 Solid
#18 Stranded
#16 Stranded
#14 Stranded
#12 Stranded
130
170
180
270
455
730

292427-BIM-A-0307
14 Unitary Products Group
TABLE 7: KBU, KBC ELECTRICAL DATA
Model
(TONS)
Power
Supply
Voltage
Indoor
Motor
FLA
Heater
Model
Number
Nominal
Heater
KW
Applied
Heater KW Electric Heat Amps
Min.
Circuit
Ampacity
(AMPS)
Max. Fuse1/
HACR
Breaker2
(AMPS)
0603
(5)
208 7.6
None -- -- -- 9.5 15
2HT04501025 10 7.5 20.8 35.6 40
2HT04501625 16 12.0 33.4 51.2 60
2HT04502625 26 19.5 54.2 77.3 80
240 6.9
None -- -- -- 8.6 15
2HT04501025 10 10.0 24.1 38.7 40
2HT04501625 16 16.0 38.5 56.7 60
2HT04502625 26 26.0 62.5 86.8 90
090
(7.5)
208 6.6
None -- -- -- 8.3 15
2HS04501025 10 7.5 20.8 34.3 35
2HS04501625 16 12.0 33.4 49.9 50
2HS04502625 26 19.5 54.2 76.0 80
2HS04503625 36 27.0 75.1 102.1 110
240 6.0
None -- -- -- 7.5 15
2HS04501025 10 10.0 24.1 37.6 40
2HS04501625 16 16.0 38.5 55.6 60
2HS04502625 26 26.0 62.5 85.7 90
2HS04503625 36 36.0 86.6 115.8 125
460 3.0
None -- -- -- 3.8 15
2HS04501046 10 10.0 12.0 18.8 20
2HS04501646 16 16.0 19.2 27.8 30
2HS04502646 26 26.0 31.3 42.8 45
2HS04503646 36 36.0 43.3 57.9 60
575 2.4
None -- -- -- 3.0 15
2HS04501058 10 10.0 9.6 15.0 20
2HS04501658 16 16.0 15.4 22.2 25
2HS04502658 26 26.0 25.0 34.3 35
2HS04503658 36 36.0 34.6 46.3 50
120
(10)
208 7.5
None -- -- -- 9.4 15
2HS04501025 10 7.5 20.8 35.4 40
2HS04501625 16 12.0 33.4 51.1 60
2HS04502625 26 19.5 54.2 77.1 80
2HS04503625 36 27.0 75.1 103.2 110
240 6.8
None -- -- -- 8.5 15
2HS04501025 10 10.0 24.1 38.6 40
2HS04501625 16 16.0 38.5 56.6 60
2HS04502625 26 26.0 62.5 86.7 90
2HS04503625 36 36.0 86.6 116.8 125
460 3.4
None -- -- -- 4.3 15
2HS04501046 10 10.0 12.0 19.3 20
2HS04501646 16 16.0 19.2 28.3 30
2HS04502646 26 26.0 31.3 43.3 45
2HS04503646 36 36.0 43.3 58.4 60
575 2.7
None -- -- -- 3.4 15
2HS04501058 10 10.0 9.6 15.4 20
2HS04501658 16 16.0 15.4 22.6 25
2HS04502658 26 26.0 25.0 34.6 35
2HS04503658 36 36.0 34.6 46.7 50

292427-BIM-A-0307
Unitary Products Group 15
SUPPLY AIR BLOWER ADJUSTMENT
The RPM of the supply air blower will depend on the required
CFM, the unit accessories and the static resistances of both
the supply and the return air duct system. With this informa-
tion, the RPM for the supply air blower can be determined
from the blower performance shown in Table 9.
Knowing the required blower RPM and the blower motor HP,
the setting (turns open) for the supply air motor pulley can be
determined from Table 8.
Each motor pulley has:
1. A threaded barrel with two flats (or notched recesses)
180 degrees apart.
2. A movable flange with one set screw.
After the movable flange has been rotated to the proper num-
ber of “turns open”; the set screw should be tightened against
the flat on the barrel to lock the movable flange in place. If the
pulley includes a locking collar, the locking collar must be
loosened to adjust the setting of the movable flange.
Note the following:
1. The supply air CFM must be within the limitations shown
in Table 3.
2. All Pulleys can be adjusted in half turn increments.
3. The tension on the belt should be adjusted for a deflec-
tion of 3/16 of an inch per foot of belt span with an
applied force of 2 to 3 pounds. Moving the blower motor
mounting plate makes this adjustment. Refer to Figure
13. Turning the adjustment bolt (B) moves the motor
mounting plate up or down. Note - NEVER loosen the
two nuts (C). Two hex nuts (A) have to be loosened to
move the mounting plate and retighten after the mount-
ing plate has been moved to the proper position.
TABLE 7: KBU, KBC ELECTRICAL DATA (CONTINUED)
Model
(TONS)
Power
Supply
Voltage
Indoor
Motor
FLA
Heater
Model
Number
Nominal
Heater
KW
Applied
Heater KW Electric Heat Amps
Min.
Circuit
Ampacity
(AMPS)
Max. Fuse1/
HACR
Breaker2
(AMPS)
180
(15)
208 10.6
None -- -- -- 13.3 20
2HS04501025 10 7.5 20.8 39.3 40
2HS04501625 16 12.0 33.4 54.9 60
2HS04502625 26 19.5 54.2 81.0 90
2HS04503625 36 27.0 75.1 107.1 110
2HS04507225 72 54.1 150.1 200.9 225
240 9.6
None -- -- -- 12.0 15
2HS04501025 10 10.0 24.1 42.1 45
2HS04501625 16 16.0 38.5 60.1 70
2HS04502625 26 26.0 62.5 90.2 100
2HS04503625 36 36.0 86.6 120.3 125
2HS04507225 72 72.0 173.2 228.5 250
460 4.8
None -- -- -- 6.0 15
2HS04501046 10 10.0 12.0 21.0 25
2HS04501646 16 16.0 19.2 30.1 35
2HS04502646 26 26.0 31.3 45.1 50
2HS04503646 36 36.0 43.3 60.1 70
2HS04507246 72 72.0 86.6 114.3 125
575 3.9
None -- -- -- 4.9 15
2HS04501058 10 10.0 9.6 16.9 20
2HS04501658 16 16.0 15.4 24.1 25
2HS04502658 26 26.0 25.0 36.1 40
2HS04503658 36 36.0 34.6 48.2 50
2HS04507258 72 72.0 69.3 91.5 100
1. Dual element time delay.
2. HACR type per NEC.
3. The K*BU060 indoor motor is single phase. The electrical heaters MUST be supplied with 3-phase voltage only.

292427-BIM-A-0307
16 Unitary Products Group
4. All pulleys are factory aligned.
5. All supply air motor pulleys are factory set at 3 “turns
open”.
After the supply air blower motor is operating, adjust the
resistances in both the supply and the return duct systems to
balance the air distribution throughout the conditioned space.
The job specifications may require that this balancing be
done by someone other than the equipment installer.
To check the supply air CFM after the initial balancing has
been completed:
1. Drill two 5/16-inch holes in the side panel as shown in
Figure 13.
2. Insert at least 8" of 1/4 inch tubing into each of these
holes for sufficient penetration into the airflow on both
sides of the evaporator coil.
NOTE: The tubes must be inserted and held in a position
perpendicular to the airflow so that velocity pressure
will not affect the static pressure readings.
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 a wet coil under field conditions
would be inaccurate. To assure a dry coil, the refrigera-
tion 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 determined from the curve
in Figure 15.
If the CFM is above or below the specified value, the supply
air motor pulley may have to be re-adjusted. After one hour of
operation, check the belt and pulleys for tightness and align-
ment.
After readings have been obtained, remove the tubes and
seal up the drilled holes in the side panel 5/16" dot plugs (P/N
029-13880) are available through normal parts ordering pro-
cedures.
NOTE: Shut down the refrigeration system before taking
any test measurements to assure a dry evaporator
coil.
TABLE 8: SUPPLY AIR BLOWER MOTOR PULLEY
ADJUSTMENT
Turns
Open Blower (RPM)
060 090 120 180
5
4
3
2
1
0
810
870
930
990
1050
1110
655
700
745
790
835
880
700
750
800
850
900
950
625
660
700
735
775
810
FIGURE 13 - TYPICAL MOTOR MOUNTING
ASSEMBLY
B
A
(DO NOT LOOSEN)
MOTOR
MOTOR MOUNT
C
FIGURE 14 - HOLE LOCATIONS (PRESSURE DROP
READINGS)
Model Dimensions (in.)
AB C D
060 9-1/2 14-3/4 19 6-3/4
090 3 17 14 8
120 3 17 14 8
180 7 22 18 10
Failure to properly adjust the total system air quan-
tity can result in extensive blower damage.
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292427-BIM-A-0307
Unitary Products Group 17
TABLE 9: BLOWER MOTOR AND DRIVE DATA
MODEL BLOWER RANGE
(RPM)
MOTOR ADJUSTABLE MOTOR PULLEY FIXED BLOWER PULLEY BELT (NOTCHED)
HP FRAME DESIG-
NATION
OUTSIDE
DIA.
(IN.)
PITCH
DIA.
(IN.)
BORE
(IN.) DESIG- NATION
OUTSIDE
DIA.
(IN.)
PITCH
DIA.
(IN.)
BORE
(IN.) DESIG- NATION
PITCH
LENGTH
(IN.) QTY.
060 810/1110 3/4 56 1VL44 3.1-4.1 2.8-3.8 5/8 AL64 6.2 5.8 3/4 A32 33.3 1
090 655/880 1-1/2 56 1VL44 2.1-4.1 2.8-3.8 7/8 AK79 7.9 7.5 1 A36 37.3 1
120 700/950 2 56 1VL44 3.1-4.1 2.8-3.8 7/8 BK80 7.4 7.0 1 A36 37.3 1
180 625/810 3 56 1VM50 3.7-4.7 3.4-4.4 7/8 BK105 9.9 9.5 1 A57 58.3 1
FIGURE 15 - PRESSURE DROP ACROSS A DRY EVAPORATOR COIL VS. SUPPLY AIR CFM
0
0.1
0.2
0.3
0.4
0.5
1500 2500 3500 4500 5500 6500 7500
CFM
Pressure Drop (IWG)
060
090 120
180

292427-BIM-A-0307
18 Unitary Products Group
TABLE 10: KBU060 (5 TON) BELT DRIVE BLOWER PERFORMANCE
CFM RPM W5BHP CFM RPM W5BHP CFM RPM W5BHP CFM RPM W5BHP CFM RPM W5BHP CFM RPM W5BHP
0.2 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 2393 927 800 0.86 2169 867 637 0.68 1957 804 487 0.52
0.3 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 2255 929 750 0.80 2030 869 587 0.63 1819 806 437 0.47
0.4 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 2112 931 694 0.74 1888 871 531 0.57 1677 808 381 0.41
0.5 ---- ---- ---- ---- ---- ---- ---- ---- 2203 991 809 0.87 1965 933 633 0.68 1741 873 470 0.50 1529 810 320 0.34
0.6 ---- ---- ---- ---- ---- ---- ---- ---- 2051 993 743 0.80 1813 935 567 0.61 1589 875 404 0.43 ---- ---- ---- ----
0.7 ---- ---- ---- ---- ---- ---- ---- ---- 1893 995 670 0.72 1655 937 494 0.53 1431 877 331 0.35 ---- ---- ---- ----
0.8 ---- ---- ---- ---- 1979 1054 779 0.84 1729 998 590 0.63 1491 939 414 0.44 ---- ---- ---- ---- ---- ---- ---- ----
0.9 ---- ---- ---- ---- 1809 1056 693 0.74 1558 1000 504 0.54 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
1 1895 1112 801 0.86 1631 1058 599 0.64 1381 1002 411 0.44 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
1.1 1710 1114 700 0.75 1446 1060 498 0.53 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
1.2 1516 1117 591 0.63 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
5. W = Watts
1. Blower performance does not include accessories.
2. Blower performance includes one-inch throwaway filters.
3. ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
4. “Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
5 TON BLOWER PERFORMANCE1,2
ESP3
TURNS OPEN4
0 Turns Open 1 Turn Open 2 Turns Open 3 Turns Open 4 Turns Open 5 Turns Open
5 Ton Belt Drive Blower Performance
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1250 1500 1750 2000 2250 2500
CFM
ESP (IWG)
0 Turns
1 Turn
2 Turns
3 Turns5 Turns 4 Turns

292427-BIM-A-0307
Unitary Products Group 19
TABLE 11: KBC090 (7.5 TON) BELT DRIVE BLOWER PERFORMANCE
CFM RPM W
5
BHP CFM RPM W
5
BHP CFM RPM W
5
BHP CFM RPM W
5
BHP CFM RPM W
5
BHP CFM RPM W
5
BHP
0.2 ---- ---- ---- ---- ---- ---- ---- ---- 4274 785 1504 1.61 3875 738 1273 1.37 3480 693 1049 1.13 3087 649 834 0.90
0.3 ---- ---- ---- ---- ---- ---- ---- ---- 4071 787 1445 1.55 3672 740 1213 1.30 3276 695 990 1.06 2883 651 775 0.83
0.4 ---- ---- ---- ---- 4250 836 1619 1.74 3849 789 1379 1.48 3450 743 1147 1.23 3054 698 924 0.99 2661 653 709 0.76
0.5 ---- ---- ---- ---- 4011 839 1546 1.66 3609 792 1306 1.40 3211 745 1074 1.15 2815 700 851 0.91 2422 656 636 0.68
0.6 ---- ---- ---- ---- 3756 841 1465 1.57 3355 794 1225 1.31 2956 748 994 1.07 2560 702 770 0.83 2167 658 555 0.60
0.7 3892 891 1624 1.74 3487 843 1376 1.48 3086 796 1136 1.22 2687 749 904 0.97 2292 704 681 0.73 ---- ---- ---- ----
0.8 3610 892 1525 1.64 3206 844 1277 1.37 2805 796 1037 1.11 2406 750 805 0.86 ---- ---- ---- ---- ---- ---- ---- ----
0.9 3318 891 1416 1.52 2914 843 1168 1.25 2513 796 928 1.00 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
1 3017 890 1296 1.39 2613 842 1048 1.12 2212 794 808 0.87 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
1.1 2708 886 1164 1.25 2304 838 916 0.98 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
1.2 2392 881 1020 1.09 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
5. W = Watts
1. Blower performance does not include accessories.
2. Blower performance includes one-inch throwaway filters.
3. ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
4. “Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
7.5 TON BLOWER PERFORMANCE
1,2
ESP
3
TURNS OPEN
4
0 Turns Open 1 Turn Open 2 Turns Open 3 Turns Open 4 Turns Open 5 Turns Open
7.5 Ton Belt Drive Blower Performance
0
0.2
0.4
0.6
0.8
1
1.2
1.4
2000 2250 2500 2750 3000 3250 3500 3750 4000 4250 4500
CFM
ESP (IWG)
0 Turns
1 Turn
2 Turns
3 Turns5 Turns 4 Turns

292427-BIM-A-0307
20 Unitary Products Group
TABLE 12: KBC120 (10 TON) BELT DRIVE BLOWER PERFORMANCE
CFM RPM W
5
BHP CFM RPM W
5
BHP CFM RPM W
5
BHP CFM RPM W
5
BHP CFM RPM W
5
BHP CFM RPM W
5
BHP
0.2 ---- ---- ---- ---- ---- ---- ---- ---- 4978 843 2092 2.24 4590 795 1752 1.88 4221 747 1453 1.56 3870 698 1196 1.28
0.3 ---- ---- ---- ---- ---- ---- ---- ---- 4752 844 2013 2.16 4364 797 1673 1.79 3995 748 1374 1.47 3645 700 1117 1.20
0.4 ---- ---- ---- ---- ---- ---- ---- ---- 4542 846 1931 2.07 4154 798 1591 1.71 3785 750 1292 1.39 3434 701 1035 1.11
0.5 ---- ---- ---- ---- ---- ---- ---- ---- 4342 847 1845 1.98 3954 800 1504 1.61 3585 751 1206 1.29 3234 703 949 1.02
0.6 ---- ---- ---- ---- 4555 896 2134 2.29 4149 849 1753 1.88 3761 801 1413 1.52 3392 753 1114 1.20 3041 704 857 0.92
0.7 ---- ---- ---- ---- 4364 897 2035 2.18 3957 850 1654 1.77 3570 803 1314 1.41 3200 754 1015 1.09 ---- ---- ---- ----
0.8 ---- ---- ---- ---- 4169 899 1928 2.07 3763 852 1546 1.66 3375 804 1206 1.29 3006 756 908 0.97 ---- ---- ---- ----
0.9 ---- ---- ---- ---- 3968 900 1810 1.94 3561 853 1429 1.53 3174 806 1089 1.17 ---- ---- ---- ---- ---- ---- ---- ----
1 4179 948 2105 2.26 3754 902 1682 1.80 3348 855 1300 1.39 2960 807 960 1.03 ---- ---- ---- ---- ---- ---- ---- ----
1.1 3949 950 1963 2.11 3524 904 1540 1.65 3117 857 1159 1.24 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
1.2 3698 952 1808 1.94 3273 906 1385 1.49 2866 859 1003 1.08 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
1.3 3421 954 1637 1.76 2996 908 1214 1.30 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
1.4 3113 957 1449 1.55 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
ESP3
TURNS OPEN4
0 Turns Open 1 Turn Open 2 Turns Open 3 Turns Open 4 Turns Open 5 Turns Open
5. W = Watts
1. Blower performance does not include accessories.
2. Blower performance includes one-inch throwaway filters.
3. ESP (External Static Pressure) given is that available for the supply and return air duct system. All internal resistances have been deducted from the total static pressure of the blower.
4. “Turns Open” refers to the setting of the variable pitch motor sheave, where “0 Turns Open” is fully closed.
10 TON BLOWER PERFORMANCE
1
,
2
10 Ton Belt Drive Blower Performance
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
2750 3000 3250 3500 3750 4000 4250 4500 4750 5000 5250
CFM
ESP (IWG)
0 Turns
1 Turn
3 Turns5 Turns 4 Turns 2 Turns