ENGINEERING DATA CB18 SERIES UP-FLOW CBS18 SERIES HORIZONTAL 2 To 5 Ton (7 To 18 kw) Nominal Cooling Capacity 7200 To 102 400 Btuh (2.1 To 30.0 kw) Optional Electrical Heat ENGINEERING DATA COILS MATCHED BLOWER REMOTE COIL SYSTEMS UNITS 50hz CB18/CBS18 Bulletin #490019 September 1994 Supersedes August 1986 CBS18 Horizontal CB18 Up-Flow Compact Blower-Coil Units Feature Efficient Operation and Application Flexibility The CB18 and CBS18 series blower-coil units are designed to meet reduced space requirements in a variety of applications. Highly efficient units provide the answer to many difficult installation problems. The flexibility of the units permit simple installations in a furred-in space, attic, crawl space, drop ceiling or closet. Versatile units are available in up-flo or horizontal models. Optional field installed electric heaters are available in several sizes for heatingcooling applications. For cooling capacities see condensing unit bulletins indexed in section Cooling Units Split System Condensing Units. Heavy gauge galvanized steel cabinet is completely insulated. Flare fittings provide quick and easy connection of refrigerant lines. Large indoor coil is sized for maximum cooling efficiency. Direct drive blower has multi-speed motor providing a choice of blower speeds. In addition, units have been tested with matching condensing units in the Lennox Research Laboratory environmental test room which meet American Society of Heating, Refrigeration and Air-Conditioning Engineers (ASHRAE) Standard 37 requirements. The rating test conditions are those included in Air-Conditioning and Refrigeration Institute (ARI) Standard test conditions while operating at rated voltage and air volumes. Blower performance data is according to actual unit tests conducted in Lennox air test chamber. Blower-coil units and components within are bonded for grounding to meet safety standards for servicing required by Underwriter s Laboratories (U.L.) and the International Electrotechnical Commission (I.E.C.). Units are shipped factory assembled. Each unit is tested at the factory to ensure proper operation at system start-up. NOTE Due to Lennox ongoing committent to quality, Specifications, Ratings and Dimensions subject to change without notice. 1994 Lennox Industries Inc.
FEATURES Durable Cabinet Constructed of heavy gauge galvanized steel and completely insulated with thick fiberglass insulation. The cabinets are subject to a five station metal wash process before painting. This preparation process results in a perfect bonding surface for the attractive finish coat of baked-on enamel. Removable panels provide complete service access. Evaporator Coil Extra large surface area of Lennox designed coil provides maximum cooling efficiency, excellent heat transfer and low air resistance. Precise circuiting gives uniform refrigerant distribution. Lennox fabricated coil is constructed of precisely spaced ripple-edged aluminum fins fitted to durable seamless copper tubes. Fins are strengthened to resist bending and are equipped with collars that grip tubing for maximum contact area. Flared shoulder tubing joints and silver soldering provide tight, leakproof joints. Long life copper tubing is easy to field service. Coil is thoroughly factory tested under high pressure to insure leakproof construction. CB18 models are equipped with dual coils in an V configuration. CBS18 models have a single slab coil. Drain Pan Deep, corrosion resistant drain pan has dual pipe drains extended outside of cabinet for ease of connection. See dimension drawings. Refrigerant Line Connections Vapor and liquid lines are equipped with flare fittings and extend outside of the cabinet for ease of connection. CB18/CBS18-65 vapor line requires sweat connection. See dimension drawing for location. Transformer and Blower Cooling Relay (Furnished) A 24 volt transformer and blower cooling relay are furnished as standard equipment and are factory installed. A terminal block is also furnished as standard. Direct Drive Blower Equipped with a Lennox designed and built direct drive blower. Each blower is statically and dynamically balanced as an assembly before it is installed in the unit. Multi-speed motor is resiliently mounted. A choice of blower speeds is available. See blower performance charts. Change of blower speeds is easily accomplished by a simple change in wiring. OPTIONAL ACCESSORIES (Must Be Ordered Extra) Electric Heat (Optional) Additive electric heaters field install internal to the unit cabinet and are available in several kw sizes, see Electric Heat table. The helix wound nichrome bare heating elements are exposed directly in the air stream resulting in instant heat transfer, low element temperatures and long service life. Each heating element is equipped with accurately located limit control with fixed temperature off setting and automatic reset. In addition, elements have supplemental thermal cutoff safety fuses providing positive protection in case of excessive temperatures. Cutoff fuses are mounted external to the element face plate for quick and easy replacement. Thermal sequencer relay brings the heating elements on and off line, in sequence and equal increments, with a time delay between each element. Sequencer also initiates and terminates blower operation. Heating control relay(s), is furnished as standard. Control box and access cover are constructed of heavy gauge galvanized steel. Heaters are factory assembled with controls installed and wired and only require plug-in field connection. Expansion Valve Kits (Optional) Kits must be ordered extra and field installed on the blower-coil unit. See condensing unit bulletin for proper kit. Filter Kit (Optional) Kit must be ordered extra and field installed. Filter box installs on return air opening external to the unit cabinet. A throwaway frame type filter is furnished on kits for CB18 up-flo models. Filter kits for CBS18 horizontal models are field assembled. Filter(s) are not furnished on kits for CBS18 horizontal models and must be ordered extra. Filter box has an access panel for removal and replacement of filter. See specification table and dimension drawings for details. SPECIFICATIONS CB18 UP-FLOW MODELS CB18-26 CB18-41 CB18-51 CB18-65 Net face area ft. 2 (m 2 ) 3.55 (0.33) 4.22 (0.39) 4.67 (0.43) 5.25 (0.49) Tube outside diameter in. (mm) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) Evaporator Coil Number of rows 3 3 4 4 Fins per inch (fins per m) 16 (630) 15 (591) 13 (512) 16 (630) Suction line connection in. (mm) flare 5/8 (15.9) 3/4 (19) 3/4 (19) 1-1/8 (28.6) sweat Liquid line connection in. (mm) flare 3/8 (9.5) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) Condensate drain connection (male pipe thread) in. (mm) (2) 3/4 (19) (2) 3/4 (19) (2) 3/4 (19) (2) 3/4 (19) Nominal cooling capacity tons (kw) 2 (7) 3 (11) 4 (14) 5 (18) Refrigerant HCFC-22 Blower wheel nominal diameter x wifdth in. (mm) 9 x 7 (229 x 178) 9 x 9 (229 x 229) 10 x 9 (254 x 229) 11-1/2 x 9 (292 x 229) Blower motor output hp (W) 1/3 (249) 1/3 (249) 1/2 (373) 1 (746) Electrical characteristics 220/240 volts 50 hertz 1 phase Shipping weight lbs. (kg) 1 package 100 (45) 115 (52) 170 (77) 180 (82) Optional Accessories (Must Be Ordered Extra) Catalog number 66F55 79F60 10G22 Filter Kit Number and size of filters in. (1) 16 x 20 x 1 (1) 16 x 25 x 1 (1) 20 x 25 x 1 mm (1) 406 x 508 x 25 (1) 406 635 x 25 (1) 508 x 635 x 25 Filters are furnished with kit. Shipping weight lbs. (kg) 5 (2) 8 (4) 9 (4) 2
SPECIFICATIONS CBS18 HORIZONTAL MODELS CBS18-26 CBS18-41 CBS18-51 CBS18-65 Net face area ft. 2 (m 2 ) 2.45 (0.23) 3.55 (0.33) 5.45 (0.51) 5.45 (0.51) Tube outside diameter in. (mm) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) 3/8 (9.5) Evaporator Number of rows 4 4 3 4 Coil Fins per inch (fins per m) 13 (512) 14 (551) 16 (630) 16 (630) Suction line connection in. (mm) flare 5/8 (15.9) 3/4 (19) 3/4 (19) 1-1/8 (28.6) sweat Liquid line connection in. (mm) flare 3/8 (9.5) 1/2 (12.7) 1/2 (12.7) 1/2 (12.7) Condensate drain connection (male pipe thread) in. (mm) (2) 3/4 (19) (2) 3/4 (19) (2) 3/4 (19) (2) 3/4 (19) Nominal cooling capacity tons (kw) 2 (7) 3 (11) 4 (14) 5 (18) Refrigerant HCFC-22 Blower wheel nominal diameter x wifdth in. (mm) 9 x 7 (229 x 178) 9 x 9 (229 x 229) 10 x 9 (254 x 229) 11-1/2 x 9 (292 x 229) Blower motor output hp (W) 1/3 (249) 1/3 (249) 1/2 (373) 1 (746) Electrical characteristics 220/240 volts 50 hertz 1 phase Shipping weight lbs. (kg) 1 package 105 (48) 130 (59) 185 (84) 210 (95) Optional Accessories (Must Be Ordered Extra) Catalog number 40G85 40G86 40G87 Filter Number and size of in. (1) 20 x 25 x 1 (1) 16 x 20 x 1 (1) 406 x 508 x 25 Kit filters mm (1) 508 x 635 x 25 (1) 406 x 508 x 25 (1) 406 x 508 x 25 Shipping weight lbs. (kg) 25 (11) 23 (10) 35 (16) Filters are not furnished with kit and must be ordered extra. OPTIONAL ELECTRIC HEAT DATA Indoor Coil Unit Electric Heat Unit and Shipping Weight Number of Elements (Steps) Volts Heating Capacity Input (1 phase) Btuh kw 220 7 200 2.1 ECB18-2.5 5 lbs. (2 kg) 1 230 7 800 2.3 240 8 500 2.5 220 14 300 4.2 ECB18-5 5 lbs. (2 kg) 1 230 15 700 4.6 240 17 100 5.0 220 17 200 5.0 ECB18-6 2 230 18 800 5.5 240 20 500 6.0 220 20 100 5.9 CB18-26 ECB18-7 CBS18-26 2 230 21 900 6.4 240 23 900 7.0 220 22 900 6.7 ECB18-88 2 230 25 100 7.3 240 27 300 8.0 ECB18-1010 2 230 31 400 9.2 ECB18-1515 3 230 47 000 13.5 *Refer to local electrical codes to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167 F (75 C). 3
OPTIONAL ELECTRIC HEAT DATA Indoor Coil Unit Electric Heat Unit and Shipping Weight Number of Elements (Steps) Volts Heating Capacity Input (1 phase) Btuh kw CB18-41 CBS18-41 CB18-51 CBS18-51 ECB18-5 5 lbs. (2 kg) ECB18-6 ECB18-7 ECB18-8 ECB18-10 ECB18-12.5 ECB18-15 ECB18-7 ECB18-8 ECB18-10 ECB18-12.5 ECB18-15 220 14 300 4.2 1 230 15 700 4.6 240 17 100 5.0 220 17 200 5.0 2 230 18 800 5.5 240 20 500 6.0 220 20 100 5.9 2 230 21 900 6.4 240 23 900 7.0 220 22 900 6.7 2 230 25 100 7.3 240 27 300 8.0 2 230 31 400 9.2 220 35 800 10.5 3 230 39 200 11.5 240 42 600 12.5 3 230 47 000 13.5 220 20 100 5.9 2 230 21 900 6.4 240 23 900 7.0 220 22 900 6.7 2 230 25 100 7.3 240 27 300 8.0 2 230 31 400 9.2 220 35 800 10.5 3 230 39 200 11.5 240 42 600 12.5 3 230 47 000 13.5 220 57 300 16.8 ECB18-20 16 lbs. (7 kg) 4 230 62 700 18.4 240 68 200 20.0 *Refer to local electrical codes to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167 F (75 C). 4
OPTIONAL ELECTRIC HEAT DATA Indoor Coil Unit Electric Heat Unit and Shipping Weight Number of Elements (Steps) Volts Heating Capacity Input (1 phase) Btuh kw ECB18-1010 2 6 lbs. 230 31 400 9.2 (3 kg) 220 35 800 10.5 ECB18-12.512 3 11 lbs. 230 39 200 11.5 (5 kg) 240 42 600 12.5 ECB18-1515 3 11 lbs. 230 47 000 13.5 (5 kg) CB18-65 CBS18-65 220 57 300 16.8 ECB18-20 4 230 62 700 18.4 16 lbs. (7 kg) 240 68 200 20.0 220 71 700 21.0 ECB18-25 5 230 78 300 23.0 21 lbs. (10 kg) 240 85 300 25.0 220 86 000 25.2 ECB18-30 6 230 94 000 27.5 26 lbs. (12 kg) 240 102 400 30.0 *Refer to local electrical codes to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167 F (75 C). BLOWER DATA CB18-26 AND CBS18-26 BLOWER PERFORMANCE High Medium Low in. w.g. Pa cfm L/s cfm L/s cfm L/s 0 0 1205 570 1085 510 840 395.10 25 1170 550 1050 495 810 380.20 50 1130 535 1020 480 785 370.30 75 1095 515 980 460 750 355.40 100 1050 495 940 445 720 340.50 125 1000 470 890 420 680 320 CB18-41 AND CBS18-41 BLOWER PERFORMANCE High Medium Low in. w.g. Pa cfm L/s cfm L/s cfm L/s 0 0 1400 660 1200 565 915 430.10 25 1360 640 1160 545 875 415.20 50 1315 620 1120 530 835 395.30 75 1265 595 1075 505 790 375.40 100 1215 575 1030 485 740 350.50 125 1160 545 985 465 685 325 CB18-51 AND CBS18-51 BLOWER PERFORMANCE High Medium-High Medium-Low Low in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s 0 0 1700 800 1345 635 1090 515 860 405.10 25 1680 795 1325 625 1080 510 840 395.20 50 1650 780 1300 615 1060 500 810 380.30 75 1615 760 1275 600 1025 485 765 360.40 100 1575 745 1245 590 985 465 720 340.50 125 1535 725 1205 570 935 440 670 315 CB18-65 AND CBS18-65 BLOWER PERFORMANCE OPTIONAL AIR FILTER RESISTANCE Air Volume Filter Resistance cfm L/s in. w.g. Pa 400 190 0.01 2 600 285 0.02 5 800 380 0.03 7 1000 470 0.05 12 1200 565 0.08 20 1400 660 0.08 20 1600 755 0.08 20 1800 850 0.09 22 2000 945 0.09 22 2200 1040 0.10 25 2400 1135 0.10 25 High Medium Low in. w.g. Pa cfm L/s cfm L/s cfm L/s 0 0 2380 1125 2170 1025 1920 905.10 25 2340 1105 2140 1010 1885 890.20 50 2295 1085 2105 995 1845 870.30 75 2245 1060 2060 970 1805 850.40 100 2195 1035 2015 950 1760 830.50 125 2140 1010 1970 930 1715 810 5
INSTALLATION CLEARANCES CB18-26 CBS18-26 CB18-41 CBS18-41 CB18-51 CBS18-51 CB18-65 CBS18-65 Cabinet 0 inch (0 mm) 0 inch (0 mm) 0 inch (0 mm) Plenum 0 inch (0 mm) 1 inch (25 mm) 1 inch (25 mm) *Duct *0 inch (0 mm) *1 inch (**25 mm) *1 inch (*25 mm) *Within 3 feet (90 cm) of the unit. DIMENSIONS mm (inches) 6
DIMENSIONS mm (inches) 7