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Lennox SCA Series Installation and operation manual

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2007 Lennox Industries Inc.
Litho U.S.A.
Page 1
Corp. 0717−L5
SCA/SCB SERIES
Service Literature
10, 20 & 24 ton
35.2, 70.4 & 84.4 kW
Revised 10−2010
SCA/SCB
The SCA120, 240, 10 and 20 ton and SCB 288 24 ton, (35.2,
70.4 and 84.4 kW) units, are configure to order units (CTO)
with a wide selection of factory installed options. The SCA120
has a cooling capacity of 123,000 Btuh and the SCA240 has
gross a cooling capacity of 242,000 Btuh and the SCB has a
gross cooling capacity of 296,000 Btuh. All models are avai-
labe with factory installed multiple staged air volume (MSAV).
Units are designed for R410A refrigerant. See unit name-
plate. Operating pressures and pressure switch settings
are significantly higher than R22 charged units. Service
equipment must be rated for R410A.
Optional electric heat is factory installed in SCA units. Electric
heat operates in single or multiple stages depending on the
kW input size. 15 kW to 60 kW heat sections are available for
the SCA120 and 30, 60 and 90 kW heat sections are avail-
able for the SCA240/SCB288. SCA120 units utilize two com-
pressors, while SCA240/SCB288 units utilize four.
Information contained in this manual is intended for use by
qualified service technicians only. All specifications are sub-
ject to change. Procedures outlined in this manual are pre-
sented as a recommendation only and do not supersede or
replace local or state codes.
If the unit must be lifted for service, rig unit by attaching four
cables to the holes located in the unit base rail (two holes at
each corner). Refer to the installation instructions for the prop-
er rigging technique.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person-
al injury or loss of life. Installation and service must
be performed by a qualified installer or service
agency.
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at discon-
nect switch(es). Unit may have multiple
power supplies.
CAUTION
Danger of sharp metallic edges. Can cause injury.
Take care when servicing unit to avoid accidental
contact with sharp edges.
SCA120
SCA240/SCB288
Table of Contents
Options / Accessories Page 2. . . . . . . . . . . . . . .
Specifications Page 4. . . . . . . . . . . . . . . . . . . . . .
Blower Data Page 8. . . . . . . . . . . . . . . . . . . . . . .
Electrical / Electric Heat Data Page 12. . . . . . . .
Parts Arrangement Page 15. . . . . . . . . . . . . . . . .
I Unit Components Page 18. . . . . . . . . . . . . . . . . .
II Placement and Installation Page 36. . . . . . . . .
III Charging Page 36. . . . . . . . . . . . . . . . . . . . . . . .
IV System Service Checks Page 38. . . . . . . . . .
V Maintenance Page 38. . . . . . . . . . . . . . . . . . . . .
VI Accessories Page 39. . . . . . . . . . . . . . . . . . .
VII Wiring and Operation Sequence Page 42. . .
Page 2
OPTIONS / ACCESSORIES
Item Description Model
Number
Catalog
Number 120 240 288
COOLING SYSTEM
Condensate Drain Trap EPDM - C1TRAP30121- 43W45 OX OX OX
Copper - LTACDKC09/36 76M19 OX OX
Corrosion Protection Condenser Section Factory O O O
Evaporator Section Factory O O O
Both Sections Factory O O O
Drain Pan Overow Switch 60W18 XXX
ELECTRICAL
Voltage
60 hz
208/230V - 3 phase Factory O O O
460V - 3 phase Factory O O O
575V - 3 phase Factory O O O
BLOWER - SUPPLY AIR
Constant Air Volume 1.5 hp Factory
3 hp Factory O
5 hp Factory O O
7.5 hp Factory O O
MSAV™ (multi-stage air volume) supply fan option 3 hp Factory O
5 hp Factory O O
7.5 hp Factory O O
CABINET
Coil Guards S1GARD22101 50W67
S1GARD22111 50W68 X
C1GARD29121 43W47 X X
Hail Guards S1GARD10101 47W20
S1GARD10111 47W21 X
C1GARD19121 43W46 X X
CONTROLS
Commercial Controls
CPC Multiex 810-3062 Factory O O O
Danfoss RTC Control Factory O O O
IMC BACnet®Module Factory O O O
IMC LonTalk®Module Factory O O O
Novar 2024 Factory O O O
Novar 2051 Factory O O O
L Connection® Network Factory O O O
Fresh Air Tempering C0SNDC03AE1- 45L78 XXX
1Smoke Detector Supply Factory O O O
Return Factory O O O
ELECTRIC HEAT
210 kW Factory
15 kW Factory O
220 kW Factory O O
30 kW Factory O O O
240 kW Factory O O
45 kW Factory O
60 kW Factory O O O
280 kW Factory O
90 kW Factory O O
1 Factory installed smoke detectors must be ordered for use with either 115V or 24V external power supply only.
2Available for 460V only.
NOTE - Catalog and model numbers shown are for ordering eld installed accessories.
OX - Congure To Order (Factory Installed) or Field Installed
O = Congure To Order (Factory Installed)
X = Field Installed
Page 3
OPTIONS / ACCESSORIES
Item Description Model
Number
Catalog
Number 120 240 288
INDOOR AIR QUALITY
Air Filters
Healthy Climate® High Efciency Air Filters MERV 8 Factory O O
MERV11- 3 C1FLTR50D-1- 97L88 OX OX
MERV 15- 1 C1FLTR50101 28W03
2C1FLTR50EA1 28W02 X
3C1FLTR50D- 28W06 X X
Indoor Air Quality (CO2) Sensors
Sensor - Wall-mount, off-white plastic cover with LCD display C0SNSR50AE1L 77N39 XXX
Sensor - Wall-mount, off-white plastic cover, no display C0SNSR52AE1L 87N53 XXX
Sensor - Black plastic case with LCD display, rated for plenum mounting C0SNSR51AE1L 87N52 XXX
Sensor - Wall-mount, black plastic case, no display, rated
for plenum mounting
C0MISC19AE1 87N54 XXX
CO2 Sensor Duct Mounting Kit - for downow applications C0MISC19AE1- 85L43 XXX
Aspiration Box - for duct mounting non-plenum rated CO2sensors
(87N53 or 77N39)
C0MISC16AE1- 90N43 XXX
ECONOMIZER
Economizer with Hood and Barometric Relief Damper (Global Sensor, eld provided) Factory O O O
Economizer Controls
Differential Enthalpy C1SNSR07AE1- 86M33 OX OX OX
Single Enthalpy C1SNSR06AE1- 86M32 OX OX OX
OUTDOOR AIR
Manual Outdoor Air
Damper with Hood
Mesh/Wire Screen Filter Furnished Factory O O O
Bird Screen Furnished Factory O O O
Motorized Outdoor Air
Damper with Hood
Mesh/Wire Screen Filter Furnished Factory O O O
POWER EXHAUST
Standard Static Factory O O O
ROOF CURBS - DOWNFLOW
14 in. height S7CURB10101- 30W03
S1CURB10111- 30W06 X
Full Perimeter - S6CURB10121- 30W15 X X
24 in. height S7CURB11101- 30W04
S1CURB11111- 30W07 X
Full Perimeter - S6CURB11121- 30W16 X X
LTL PACKAGING Factory O O O
1 16 x 20 x 2 - Order 4 per unit
2 16 x 25 x 2 - Order 6 per unit
3 20 x 20 x 2 - order 12 per unit
NOTE - Catalog and model numbers shown are for ordering eld installed accessories.
OX - Congure To Order (Factory Installed) or Field Installed
O = Congure To Order (Factory Installed)
X = Field Installed
Page 4
SPECIFICATIONS 10 TON
General
Data
Nominal Tonnage 10 Ton 10 Ton
Model No. SCA120H4B SCA120H4M
Blower Type Constant Air Volume MSAV (Multi-Stage Air
Volume) Supply Fan Option
Efciency Type High High
Cooling
Performance
Gross Cooling Capacity - Btuh 123,000 123,000
1Net Cooling Capacity - Btuh 119,000 119,000
AHRI Rated Air Flow - cfm 3700 3700
Total Unit Power 9.7 9.8
1EER (Btuh/Watt) 12.3 12.1
2IEER (Btuh/Watt) 12.8 15.2
Refrigerant Charge Furnished
R-410A
Circuit 1 22 lbs. 8 oz. 24 lbs. 0 oz.
Circuit 2 21 lbs. 0 oz. 21 lbs. 8 oz.
3Sound Rating Number (dB) 88 88
Electric Heat Options Available See page 2
Compressor Type (No.) Scroll (2) Scroll (2)
Condenser Coil Net face area - sq. ft. 47.1 47.1
Tube diameter - in. 3/8 3/8
Number of rows 3 3
Fins per inch 14 14
Condenser
Fan(s)
Motor horsepower (3) 1/3 (3) 1/3
Motor rpm 1075 1075
Total Motor watts 940 940
Diameter - in. (3) 24 (3) 24
Number of blades 3 3
Total air volume - cfm 11,800 11,800
Evaporator Coil Net face area - sq. ft. 15.6 15.6
Tube diameter - in. 3/8 3/8
Number of rows 4 4
Fins per inch 14 14
Drain connection - no. & size (1) 1 (1) 1
Expansion device type Thermostatic Expansion Valve
4Indoor
Blower
Nominal motor output 3 3
Maximum usable motor output 3.45 - - -
RPM Range (Standard Static) Drive #1 - 660-900 rpm Drive #3 - 350-1050 rpm
RPM Range (High Static) Drive #2 - 865-1080 rpm - - -
Wheel nominal diameter x width - in. (1) 15 x 15 (1) 15 x 15
Filters Type of lter MERV 7 or equivalent
Number and size - in. (6) 16 x 25 x 2
Electrical characteristics 208/230V, 460V, or 575V - 60 hertz - 3 phase
NOTE - Net capacity includes evaporator blower motor heat deduction. Gross capacity does not include evaporator blower motor heat deduction.
1 Certied in accordance with the ULE certication program, which is based on AHRI Standard 340/360, 95°F outdoor air temperature and 80°F db/67°F wb entering
evaporator air; minimum external duct static pressure.
2 Integrated Energy Efciency Ratio certied and tested according to AHRI Standard 340/360.
3 Sound Rating Number rated in accordance with test conditions included in AHRI Standard 270.
4 Using total air volume and system static pressure requirements determine from blower performance tables rpm and motor output required. Maximum usable output of
motors furnished are shown. In Canada, nominal motor output is also maximum usable motor output. If motors of comparable output are used, be sure to keep within
the service factor limitations outlined on the motor nameplate.
Page 5
SPECIFICATIONS 20 TON
General
Data
Nominal Tonnage 20 Ton 20 Ton
Model No. SCA240H4B SCA240H4M
Blower Type Constant Air Volume MSAV (Multi-Stage Air
Volume) Supply Fan Option
Efciency Type High High
Cooling
Performance
Gross Cooling Capacity - Btuh 242,000 242,000
Net Cooling Capacity - Btuh 1236,000 2236,000
AHRI Rated Air Flow - cfm 6500 6500
Total Unit Power - kW 18.7 18.7
EER (Btuh/Watt) 112.6 212.6
3IEER (Btuh/Watt) 14.3 16.8
Refrigerant Charge Furnished
R-410A
Circuit 1 17 lbs. 0 oz. 16 lbs. 0 oz.
Circuit 2 17 lbs. 0 oz. 16 lbs. 0 oz.
Circuit 3 17 lbs. 0 oz. 15 lbs. 0 oz.
Circuit 4 17 lbs. 0 oz. 15 lbs. 0 oz.
4Sound Rating Number (dB) 92 92
Electric Heat Options Available See page 2
Compressor Type (No.) Scroll (4) Scroll (4)
Condenser Coil Net face area - sq. ft. 70.6 70.6
Tube diameter - in. 3/8 3/8
Number of rows 3 3
Fins per inch 14 14
Condenser
Fan(s)
Motor horsepower (6) 1/3 (6) 1/3
Motor rpm 1075 1075
Total Motor watts 1900 1900
Diameter - in. (6) 24 (6) 24
Number of blades 3 3
Total air volume - cfm 22,500 22,500
Evaporator Coil Net face area - sq. ft. 33.3 33.3
Tube diameter - in. 3/8 3/8
Number of rows 3 3
Fins per inch 14 14
Drain connection - no. & size (1) 1 (1) 1
Expansion device type Thermostatic Expansion Valve
5Indoor
Blower
Nominal motor HP 5 5
Maximum usable motor HP 5.75 - - -
RPM Range (Standard Static) Drive #2 - 520-685 rpm Drive #4 - 282-846 rpm
RPM Range (High Static) Drive #3 - 685-865 rpm - - -
Nominal motor HP 7.5 7.5
Maximum usable motor HP 8.63 - - -
RPM Range Drive #6 - 770-965 rpm Drive #7 - 322-965 rpm
Wheel nominal diameter x width - in. (2) 18 x 15 (2) 18 x 15
Filters Type of lter MERV 7 or equivalent
Number and size - in. (12) 20 x 20 x 2
Electrical characteristics 208/230V, 460V, or 575V - 60 hertz - 3 phase
NOTE - Net capacity includes evaporator blower motor heat deduction. Gross capacity does not include evaporator blower motor heat deduction.
1 Certied in accordance with the ULE certication program, which is based on AHRI Standard 340/360, 95°F outdoor air temperature and 80°F db/67°F wb entering
evaporator air; minimum external duct static pressure.
2 Rated at test conditions included in AHRI Standard 340/360, 95°F outdoor air temperature and 80°F db/67°F wb entering evaporator air; minimum external duct static
pressure.
3 Integrated Energy Efciency Ratio certied and tested according to AHRI Standard 340/360.
4 Sound Rating Number rated in accordance with test conditions included in AHRI Standard 270.
5 Using total air volume and system static pressure requirements determine from blower performance tables rpm and motor output required. Maximum usable output of
motors furnished are shown. In Canada, nominal motor output is also maximum usable motor output. If motors of comparable output are used, be sure to keep within
the service factor limitations outlined on the motor nameplate.
Page 6
SPECIFICATIONS 24 TON
General
Data
Nominal Tonnage 24 Ton 24 Ton
Model No. SCB288H4B SCB288H4M
Blower Type Constant Air Volume MSAV (Multi-Stage Air
Volume) Supply Fan Option
Efciency Type High High
Cooling
Performance
Gross Cooling Capacity - Btuh 296,000 296,000
Net Cooling Capacity - Btuh 288,000 288,000
AHRI Rated Air Flow - cfm 7700 7700
Total Unit Power - kW 24.8 24.8
1EER (Btuh/Watt) 11.6 11.6
2IEER (Btuh/Watt) 12.8 14.2
Refrigerant Charge Furnished
R-410A
Circuit 1 16 lbs. 0 oz. 15 lbs. 8 oz.
Circuit 2 16 lbs. 0 oz. 15 lbs. 8 oz.
Circuit 3 16 lbs. 0 oz. 15 lbs. 8 oz.
Circuit 4 16 lbs. 0 oz. 15 lbs. 8 oz.
3Sound Rating Number (dB) 94 94
Electric Heat Options Available See page 2
Compressor Type (No.) Scroll (4) Scroll (4)
Condenser Coil Net face area - sq. ft. 70.6 70.6
Tube diameter - in. 3/8 3/8
Number of rows 3 3
Fins per inch 14 14
Condenser
Fan(s)
Motor horsepower (6) 1/3 (6) 1/3
Motor rpm 1075 1075
Total Motor watts 1900 1900
Diameter - in. (6) 24 (6) 24
Number of blades 3 3
Total air volume - cfm 24,500 24,500
Evaporator Coil Net face area - sq. ft. 33.3 33.3
Tube diameter - in. 3/8 3/8
Number of rows 3 3
Fins per inch 14 14
Drain connection - no. & size (1) 1 (1) 1
Expansion device type Thermostatic Expansion Valve
4Indoor
Blower
Nominal motor HP 5 5
Maximum usable motor HP 5.75 - - -
RPM Range (Standard Static) Drive #2 - 520-685 rpm Drive #4 - 282-846 rpm
RPM Range (High Static) Drive #3 - 685-865 rpm - - -
Nominal motor HP 7.5 7.5
Maximum usable motor HP 8.63 - - -
RPM Range Drive #6 - 770-965 rpm Drive #7 - 322-965 rpm
Wheel nominal diameter x width - in. (2) 18 x 15 (2) 18 x 15
Filters Type of lter MERV 7 or equivalent
Number and size - in. (12) 20 x 20 x 2
Electrical characteristics 208/230V, 460V, or 575V - 60 hertz - 3 phase
NOTE - Net capacity includes evaporator blower motor heat deduction. Gross capacity does not include evaporator blower motor heat deduction.
1 Rated at test conditions included in AHRI Standard 340/360, 95°F outdoor air temperature and 80°F db/67°F wb entering evaporator air; minimum external duct static
pressure.
2 Integrated Energy Efciency Ratio certied and tested according to AHRI Standard 340/360.
3 Sound Rating Number rated in accordance with test conditions included in AHRI Standard 270.
4 Using total air volume and system static pressure requirements determine from blower performance tables rpm and motor output required. Maximum usable output of
motors furnished are shown. In Canada, nominal motor output is also maximum usable motor output. If motors of comparable output are used, be sure to keep within
the service factor limitations outlined on the motor nameplate.
Page 7
SPECIFICATIONS - INTEGRATED MODULAR CONTROLLER (IMC)
Operating Environment Temperature: –40°F to 155°F
Humidity: 10% - 95% RH, Non- Condensing
Power Requirements 24VAC (+/–25%), 50/60Hz
4.8 VA for IMC maximum
14.4 VA for IMC w/all expansion boards Maximum
Memory Type Re-programmable Flash
Device Commissioning Auto-poll (real plug and play)
Unit type Electric/Electric, Gas/Electric & Heat Pumps (Rooftops), CAV, MSAV (Multi-Stage
Air Volume) and VAV units
Cooling stages 4
Heating stages 4
Modulating Gas Valves 2
Electronic Congure To Order Parameters 239
Alarm Codes 107
Alarm Codes Stored 84
Display Type 3 Digit Seven Segment Red LED
Indicator LEDs 1- Heartbeat on each board
1- Bus transmit
1 - Bus receive
1- each for Y1,Y2,W1,W2,G,OCP
Dimensions IMC Main Board:
Height: 1-1/2 in., Width: 12 in., Depth: 7 in.
#2 Compressor Module,
#2 Compressor and Reversing Valve Module
#3 and 4 Compressor Module,
#2 Electric Heat Module,
#2 Gas Heat Module,
Economizer Module,
Humiditrol Module
VAV, Modulating Gas and I/O Modules:
Height: 7/8 in., Width: 3-3/4 in., Depth: 4 in.
Weight 2 lbs. for IMC w/all expansion boards installed
Cable Type SysBus - Lennox yellow COMM cable:
C0MISC00AE1- (27M19) (500 ft. box),
C0MISC04AE1- (94L63) (1000 ft. box),
C0MISC01AE1- (68M25) (2500 ft. roll)
ZoneBus - Lennox purple COMM cable:
C0MISC05AE1- (23W99) (500 ft. box)
C0MISC06AE1- (24W00) (1000 ft. box)
C0MISC07AE1- (24W01) (2500 ft. roll)
Non-Communicating Zone Sensor
Non-Communicating RH Sensor
Non-Communicating CO2 Sensor
Page 8
BLOWER DATA
SCA120H BLOWER PERFORMANCE
NOTE - Blower Table Includes Resistance For Base Unit With Electric Heat, Wet Indoor Coil And Air Filters In Place.
NOTE - Minimum 3800 cfm with electric heat.
See Blower Motor / Drive Kit Table on page 11 for Motor HP and Drive Kit RPM Ranges Available.
Air
Volume
cfm
TOTAL STATIC PRESSURE - In. w.g.
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2000 472 0.13 503 0.26 534 0.40 566 0.54 598 0.68 630 0.81 662 0.93 695 1.03 726 1.11 759 1.18 792 1.25 828 1.34 866 1.45
2200 484 0.23 514 0.36 545 0.50 576 0.64 608 0.77 640 0.90 672 1.01 703 1.11 735 1.19 767 1.26 800 1.34 837 1.43 875 1.54
2400 497 0.33 526 0.46 557 0.60 588 0.73 619 0.86 650 0.99 682 1.10 713 1.19 745 1.27 777 1.35 811 1.43 847 1.53 885 1.64
2600 510 0.44 539 0.57 569 0.70 600 0.83 631 0.96 662 1.08 693 1.19 725 1.29 756 1.37 788 1.44 822 1.53 858 1.63 896 1.75
2800 524 0.55 553 0.68 583 0.81 613 0.94 644 1.07 675 1.19 706 1.29 737 1.39 768 1.47 801 1.55 835 1.64 871 1.75 908 1.87
3000 538 0.67 567 0.79 597 0.93 627 1.06 658 1.18 689 1.30 720 1.41 751 1.50 782 1.58 815 1.67 849 1.76 884 1.87 922 1.99
3200 554 0.79 583 0.92 612 1.05 643 1.18 673 1.31 704 1.42 735 1.53 766 1.62 797 1.71 830 1.79 863 1.89 899 2.00 936 2.12
3400 570 0.92 599 1.05 629 1.18 659 1.31 690 1.44 721 1.55 752 1.66 782 1.75 814 1.84 846 1.93 879 2.03 914 2.13 951 2.25
3600 588 1.06 616 1.19 646 1.32 677 1.45 708 1.58 739 1.69 769 1.80 800 1.89 831 1.98 863 2.07 896 2.17 931 2.28 967 2.39
3800 606 1.21 635 1.34 665 1.48 696 1.61 727 1.73 758 1.85 788 1.95 818 2.04 849 2.13 881 2.22 913 2.32 948 2.42 983 2.53
4000 626 1.37 655 1.50 685 1.64 716 1.77 747 1.90 778 2.01 808 2.10 837 2.20 868 2.28 899 2.38 932 2.47 965 2.57 1000 2.68
4200 647 1.54 676 1.68 707 1.82 738 1.95 769 2.07 799 2.18 828 2.27 857 2.36 887 2.45 918 2.54 950 2.63 983 2.73 1018 2.84
4400 669 1.72 699 1.87 730 2.01 761 2.14 791 2.25 820 2.35 849 2.44 878 2.53 908 2.61 938 2.70 969 2.79 1002 2.89 1036 2.99
4600 693 1.92 724 2.07 755 2.21 785 2.34 814 2.45 842 2.54 871 2.62 899 2.71 928 2.79 958 2.87 989 2.96 1021 3.06 1054 3.16
4800 718 2.14 749 2.29 780 2.43 809 2.54 837 2.64 865 2.73 893 2.81 920 2.88 949 2.96 979 3.04 1009 3.13 1041 3.22 1073 3.32
NOTE - MSAV (Multi-Stage Air Volume) Supply Fan Option drive is capable of 350 - 1050 rpm.
Page 9
BLOWER DATA
SCA240H BLOWER PERFORMANCE
NOTE - Blower Table Includes Resistance For Base Unit With Electric Heat, Wet Indoor Coil And Air Filters In Place.
NOTE - Minimum 8000 cfm with electric heat.
See Blower Motor / Drive Kit Table on page 11 for Motor HP and Drive Kit RPM Ranges Available.
Air
Volume
cfm
TOTAL STATIC PRESSURE - In. w.g.
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2000 255 0.33 310 0.48 366 0.63 416 0.74 458 0.81 498 0.89 537 0.99 573 1.10 607 1.22 642 1.35 677 1.49 712 1.65 749 1.80
2200 258 0.37 313 0.52 369 0.67 418 0.78 460 0.85 500 0.92 538 1.03 574 1.15 609 1.27 643 1.40 678 1.55 714 1.70 751 1.86
2400 261 0.40 316 0.56 372 0.70 421 0.81 462 0.88 502 0.96 540 1.07 576 1.19 610 1.32 645 1.45 680 1.60 716 1.76 753 1.92
2600 265 0.44 319 0.60 375 0.74 423 0.85 464 0.92 505 1.00 542 1.11 578 1.24 612 1.37 646 1.51 682 1.66 718 1.82 755 1.98
2800 268 0.48 322 0.63 378 0.77 426 0.89 467 0.95 507 1.04 545 1.16 580 1.29 614 1.42 648 1.56 684 1.72 720 1.88 757 2.04
3000 272 0.51 326 0.67 382 0.81 429 0.92 470 0.99 510 1.09 547 1.21 582 1.34 616 1.48 650 1.63 686 1.78 723 1.94 759 2.10
3200 276 0.55 330 0.71 386 0.85 433 0.96 473 1.03 513 1.13 550 1.26 584 1.40 618 1.54 652 1.69 688 1.85 725 2.01 762 2.16
3400 280 0.59 335 0.74 391 0.88 437 1.00 477 1.08 516 1.18 552 1.32 587 1.46 620 1.61 655 1.76 691 1.91 727 2.07 764 2.23
3600 285 0.62 340 0.78 395 0.92 441 1.04 480 1.12 520 1.24 555 1.38 589 1.53 623 1.67 657 1.83 693 1.98 730 2.14 767 2.30
3800 290 0.66 345 0.81 400 0.96 445 1.08 484 1.17 523 1.29 559 1.44 592 1.59 626 1.74 660 1.90 696 2.06 733 2.22 770 2.38
4000 296 0.69 351 0.85 406 0.99 449 1.12 488 1.22 527 1.35 562 1.51 595 1.66 629 1.82 663 1.97 699 2.14 736 2.30 773 2.46
4200 301 0.73 358 0.88 411 1.03 453 1.17 493 1.27 531 1.41 565 1.57 599 1.73 632 1.89 666 2.05 702 2.22 739 2.39 776 2.56
4400 308 0.76 364 0.92 416 1.07 458 1.22 497 1.33 534 1.48 569 1.64 602 1.81 635 1.97 670 2.14 706 2.31 743 2.48 779 2.66
4600 315 0.80 371 0.95 422 1.12 463 1.26 502 1.39 539 1.54 573 1.71 606 1.88 639 2.05 673 2.22 710 2.40 746 2.58 783 2.76
4800 322 0.83 378 0.99 427 1.16 468 1.32 507 1.45 543 1.62 577 1.79 609 1.96 642 2.14 677 2.32 714 2.50 751 2.69 788 2.87
5000 330 0.86 386 1.03 433 1.21 473 1.38 512 1.52 547 1.69 581 1.87 613 2.05 647 2.22 682 2.41 718 2.60 755 2.79 792 2.98
5200 338 0.89 393 1.07 438 1.27 478 1.44 517 1.59 551 1.77 585 1.95 617 2.13 651 2.32 686 2.50 722 2.70 759 2.89 796 3.08
5400 346 0.92 400 1.12 444 1.33 484 1.51 522 1.67 556 1.86 589 2.04 622 2.23 655 2.41 690 2.60 727 2.79 764 2.98 801 3.17
5600 355 0.96 407 1.17 450 1.40 490 1.58 528 1.76 561 1.96 594 2.14 626 2.33 660 2.51 695 2.70 732 2.89 769 3.08 806 3.27
5800 364 1.00 414 1.23 457 1.47 496 1.65 533 1.85 566 2.06 599 2.24 631 2.43 665 2.61 701 2.81 737 3.00 774 3.19 811 3.38
6000 372 1.04 422 1.29 463 1.54 502 1.73 539 1.95 571 2.17 604 2.35 636 2.53 670 2.72 706 2.91 743 3.11 779 3.30 816 3.50
6200 381 1.08 429 1.36 470 1.62 508 1.82 544 2.05 576 2.28 609 2.46 641 2.64 676 2.82 712 3.02 749 3.22 785 3.42 822 3.62
6400 390 1.14 437 1.44 477 1.71 515 1.92 550 2.16 582 2.39 614 2.57 647 2.74 682 2.93 718 3.14 755 3.34 792 3.54 828 3.75
6600 399 1.20 444 1.53 484 1.80 521 2.02 556 2.28 587 2.51 620 2.68 653 2.85 688 3.04 725 3.25 762 3.46 798 3.67 835 3.87
6800 408 1.27 452 1.62 491 1.89 528 2.13 562 2.40 593 2.63 625 2.80 659 2.96 694 3.15 731 3.37 768 3.58 805 3.80 842 4.01
7000 417 1.35 460 1.71 498 1.99 535 2.24 568 2.52 599 2.74 631 2.91 665 3.08 700 3.27 737 3.48 775 3.70 812 3.92 848 4.14
7200 426 1.45 467 1.82 505 2.10 541 2.36 574 2.65 606 2.86 638 3.02 671 3.19 707 3.39 744 3.60 781 3.83 818 4.05 855 4.27
7400 435 1.55 475 1.93 513 2.22 548 2.49 580 2.77 612 2.98 644 3.14 677 3.31 713 3.50 750 3.72 788 3.94 825 4.17 861 4.39
7600 444 1.67 483 2.05 520 2.34 555 2.62 587 2.90 618 3.10 650 3.26 684 3.43 719 3.62 756 3.84 794 4.06 831 4.29 868 4.51
7800 452 1.80 491 2.18 528 2.47 562 2.75 594 3.02 625 3.22 657 3.38 690 3.55 726 3.74 763 3.96 800 4.18 837 4.40 874 4.62
8000 461 1.93 500 2.31 536 2.61 570 2.89 601 3.15 632 3.35 664 3.51 697 3.67 732 3.87 769 4.08 806 4.30 843 4.52 880 4.74
8200 470 2.08 508 2.45 544 2.75 577 3.03 608 3.29 639 3.47 671 3.63 704 3.80 739 3.99 775 4.20 812 4.42 849 4.64 886 4.86
8400 479 2.23 516 2.60 552 2.90 585 3.18 615 3.42 646 3.60 678 3.76 711 3.93 746 4.11 782 4.32 819 4.54 855 4.76 892 4.98
8600 488 2.39 525 2.76 560 3.05 592 3.33 623 3.56 653 3.74 685 3.89 718 4.06 752 4.24 788 4.44 825 4.66 862 4.88 898 5.10
8800 498 2.56 533 2.91 568 3.21 600 3.48 630 3.70 661 3.87 692 4.02 725 4.19 759 4.37 795 4.57 831 4.78 868 5.00 904 5.21
9000 507 2.73 542 3.08 576 3.37 608 3.63 638 3.85 668 4.01 699 4.16 732 4.32 766 4.50 802 4.69 838 4.90 874 5.12 911 5.33
9200 516 2.91 551 3.25 584 3.53 616 3.78 645 3.99 676 4.15 707 4.29 739 4.45 773 4.63 808 4.82 844 5.03 881 5.24 917 5.46
9400 526 3.09 560 3.42 593 3.69 623 3.94 653 4.13 683 4.28 714 4.43 746 4.58 780 4.76 815 4.95 851 5.15 887 5.36 923 5.58
9600 535 3.27 569 3.59 601 3.86 631 4.10 661 4.28 691 4.42 721 4.56 753 4.72 787 4.89 822 5.08 858 5.28 894 5.49 930 5.70
Page 10
BLOWER DATA
SCB288H BLOWER PERFORMANCE
NOTE - Blower Table Includes Resistance For Base Unit With Gas Heat, Wet Indoor Coil And Air Filters In Place.
NOTE - Minimum 8000 cfm with electric heat.
See Blower Motor / Drive Kit Table on page 11 for Motor HP and Drive Kit RPM Ranges Available.
Air
Volume
cfm
TOTAL STATIC PRESSURE - In. w.g.
0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
2400 327 0.42 377 0.54 428 0.65 479 0.75 527 0.87 568 0.99 599 1.10 628 1.22 659 1.31 690 1.40 719 1.51 746 1.66
2600 330 0.44 379 0.57 430 0.68 481 0.79 529 0.91 570 1.03 601 1.15 630 1.27 661 1.37 692 1.46 721 1.58 748 1.72
2800 333 0.46 381 0.59 432 0.71 483 0.83 531 0.95 572 1.08 603 1.20 632 1.32 664 1.43 694 1.53 723 1.65 750 1.79
3000 336 0.49 384 0.62 434 0.75 485 0.87 534 1.00 574 1.13 605 1.26 634 1.38 666 1.49 697 1.59 725 1.71 752 1.86
3200 339 0.51 387 0.65 437 0.79 488 0.91 536 1.05 576 1.18 608 1.31 637 1.44 668 1.55 699 1.66 727 1.78 754 1.93
3400 343 0.54 391 0.69 440 0.83 491 0.96 539 1.10 579 1.24 610 1.37 639 1.50 670 1.62 701 1.73 730 1.86 756 2.00
3600 346 0.58 394 0.72 444 0.87 495 1.01 542 1.15 581 1.29 612 1.43 641 1.57 672 1.69 703 1.80 732 1.93 758 2.08
3800 351 0.61 398 0.76 448 0.91 498 1.06 545 1.20 584 1.35 614 1.50 643 1.64 675 1.76 705 1.88 734 2.01 760 2.16
4000 355 0.65 403 0.81 452 0.96 502 1.11 549 1.26 587 1.41 617 1.56 645 1.71 677 1.84 708 1.96 736 2.09 762 2.24
4200 360 0.69 407 0.85 456 1.01 506 1.16 553 1.32 590 1.47 619 1.63 648 1.78 679 1.91 710 2.04 739 2.17 765 2.32
4400 365 0.73 412 0.90 461 1.06 511 1.22 556 1.38 593 1.54 622 1.70 650 1.86 682 1.99 713 2.12 741 2.25 767 2.40
4600 370 0.78 417 0.95 466 1.12 516 1.28 560 1.44 597 1.61 625 1.78 653 1.94 684 2.08 715 2.2 744 2.34 769 2.49
4800 375 0.83 422 1.01 471 1.18 520 1.34 565 1.50 600 1.68 628 1.85 656 2.02 687 2.16 718 2.29 746 2.43 772 2.59
5000 381 0.89 428 1.06 477 1.23 525 1.40 569 1.57 604 1.75 631 1.93 658 2.10 690 2.25 720 2.38 749 2.52 774 2.68
5200 387 0.94 434 1.12 483 1.30 531 1.47 573 1.64 607 1.83 634 2.02 661 2.19 692 2.34 723 2.48 751 2.62 777 2.78
5400 393 1.00 440 1.19 489 1.36 536 1.53 577 1.72 610 1.91 636 2.10 664 2.28 695 2.43 726 2.57 754 2.71 780 2.87
5600 400 1.07 447 1.25 495 1.43 541 1.61 581 1.80 613 2.00 639 2.19 667 2.37 698 2.53 729 2.66 757 2.81 783 2.98
5800 407 1.13 454 1.32 501 1.50 546 1.68 585 1.88 616 2.09 642 2.29 670 2.47 701 2.62 732 2.76 760 2.91 786 3.08
6000 414 1.20 461 1.39 507 1.57 551 1.76 589 1.97 619 2.18 645 2.38 673 2.57 704 2.72 735 2.86 763 3.01 788 3.19
6200 422 1.27 468 1.46 514 1.65 556 1.85 593 2.06 622 2.27 648 2.48 676 2.66 707 2.82 738 2.96 766 3.12 792 3.31
6400 429 1.34 475 1.53 520 1.73 561 1.94 596 2.16 625 2.37 651 2.58 679 2.76 711 2.92 742 3.07 770 3.23 795 3.43
6600 437 1.41 482 1.61 526 1.82 566 2.04 600 2.26 628 2.47 655 2.68 683 2.86 715 3.02 745 3.18 773 3.35 798 3.55
6800 445 1.49 490 1.69 532 1.91 571 2.14 603 2.37 632 2.58 658 2.78 687 2.97 718 3.13 749 3.29 777 3.47 801 3.68
7000 453 1.56 497 1.78 538 2.01 575 2.25 607 2.48 635 2.69 662 2.88 691 3.07 722 3.24 753 3.41 780 3.59 805 3.82
7200 461 1.64 504 1.87 544 2.12 580 2.37 611 2.60 639 2.80 666 2.99 695 3.18 727 3.35 757 3.53 784 3.72 808 3.96
7400 470 1.73 511 1.97 550 2.23 584 2.49 615 2.72 642 2.92 670 3.10 700 3.29 731 3.47 761 3.65 788 3.86 812 4.10
7600 478 1.82 519 2.08 556 2.36 589 2.62 619 2.85 646 3.04 674 3.22 704 3.41 735 3.59 765 3.78 792 4.00 815 4.25
7800 486 1.92 526 2.20 562 2.48 594 2.75 623 2.98 651 3.16 679 3.34 709 3.53 740 3.72 769 3.92 796 4.15 819 4.41
8000 494 2.03 533 2.32 568 2.62 599 2.89 627 3.11 655 3.29 684 3.46 714 3.65 745 3.85 774 4.07 800 4.30 823 4.57
8200 502 2.14 540 2.44 574 2.76 605 3.03 633 3.25 660 3.42 689 3.59 719 3.79 750 3.99 778 4.22 804 4.46 826 4.73
8400 510 2.26 547 2.58 581 2.89 611 3.17 638 3.38 666 3.56 694 3.72 724 3.93 755 4.14 783 4.37 808 4.63 830 4.90
8600 518 2.39 554 2.71 587 3.04 617 3.31 644 3.52 671 3.69 700 3.86 730 4.07 759 4.30 787 4.53 812 4.80 834 5.08
8800 526 2.52 561 2.86 594 3.19 623 3.46 650 3.66 677 3.83 705 4.01 735 4.22 764 4.45 792 4.70 816 4.97 838 5.26
9000 534 2.66 568 3.01 600 3.34 629 3.61 655 3.81 683 3.98 711 4.16 740 4.38 769 4.62 796 4.87 820 5.15 842 5.44
9200 541 2.81 575 3.17 606 3.50 634 3.77 661 3.96 688 4.13 717 4.31 746 4.54 775 4.78 801 5.05 825 5.34 846 5.64
9400 548 2.97 582 3.34 613 3.67 640 3.93 667 4.12 694 4.29 723 4.47 751 4.70 780 4.96 806 5.23 829 5.53 851 5.84
9600 556 3.14 588 3.51 619 3.84 646 4.10 673 4.28 700 4.45 728 4.64 757 4.88 785 5.14 810 5.42 834 5.73 855 6.04
9800 563 3.31 595 3.68 625 4.02 652 4.26 679 4.45 706 4.62 734 4.81 763 5.06 790 5.33 815 5.62 838 5.93 859 6.25
10,000 569 3.48 601 3.86 631 4.19 658 4.44 685 4.62 712 4.79 740 4.99 768 5.24 795 5.52 820 5.82 843 6.14 864 6.47
10,200 576 3.66 608 4.04 637 4.37 664 4.61 691 4.79 718 4.97 746 5.17 774 5.43 800 5.72 825 6.03 847 6.36 869 6.69
10,400 583 3.84 614 4.23 643 4.55 670 4.79 697 4.97 724 5.15 752 5.36 779 5.63 806 5.92 830 6.25 852 6.58 873 6.91
10,600 589 4.03 620 4.41 649 4.74 677 4.97 703 5.15 730 5.33 758 5.56 785 5.83 811 6.14 835 6.47 857 6.81 878 7.14
10,800 596 4.22 626 4.60 655 4.92 683 5.15 709 5.33 736 5.53 764 5.76 791 6.04 816 6.36 840 6.70 862 7.05 883 7.38
11,000 602 4.41 632 4.78 662 5.10 689 5.33 716 5.52 743 5.72 770 5.97 797 6.26 822 6.58 845 6.93 867 7.28 888 7.62
11,200 608 4.60 639 4.97 668 5.29 695 5.52 722 5.71 749 5.92 776 6.18 802 6.48 827 6.81 850 7.17 872 7.53 893 7.86
11,400 615 4.79 645 5.16 674 5.47 701 5.71 728 5.91 755 6.13 782 6.40 808 6.71 833 7.05 855 7.41 877 7.77 898 8.11
11,600 621 4.98 651 5.35 680 5.66 708 5.90 735 6.11 761 6.34 788 6.62 814 6.94 838 7.29 861 7.66 882 8.03 903 8.36