SERVICE UNIT INFORMATION Corp. 9121 L7 CHA16 2 5 TON UNITS Litho U.S.A. CHA16 series units in the 2 5 ton sizes were introduced in the spring of 1990. The single package cooling units may be used in both residential and commercial applications. Electric heat is available in several Kw sizes. Units are designed for rooftop or side of building installation with either bottom or horizontal discharge. For commercial applications, the CHA16 is designed to accept any of several different thermostat control systems with minimum field wiring. Control options such as economizer, warm up kit, Honeywell W973 control or Honeywell W7400 control connect to the unit with jack plugs. When plugged in the controls become an integral part of the unit wiring. Commercial units are also equipped with a low voltage terminal strip to facilitate thermostat field wiring. CHA16 SERIES UNITS 2 THROUGH 5 TON UNITS All specifications in this manual are subject to change. TABLE OF CONTENTS Introduction.................................... Page 1 Heating Elements............................. Page 29 Specifications................................ Pages 2-4 IV PLACEMENT AND INSTALLATION.............. Page 30 Electrical Data.................................. Page 5 V ELECTRICAL CONNECTIONS................... Page 30 Accessory Air Resistance Data................... Page 5 VI START-UP.................................... Page 30 Diffuser Air Resistance Data...................... Page 5 VII REFRIGERATION SYSTEM SERVICE CHECKS. Pages 30,31 Blower Performance Data..................... Pages 6-8 Gauge Manifold Attachment................... Page 30 Parts Arrangement.............................. Page 8 Charging.................................. Pages 30-31 I APPLICATION................................... Page 9 VIII BLOWER OPERATION AND ADJUSTMENT...... Page 32 II UNIT COMPONENTS............................ Page 3 Blower Operation............................. Page 32 Control Box Components.................... Pages 9-13 Determining Unit CFM......................... Page 32 Control Transformer........................... Page 11 Blower Speed Adjustment.................. Pages 32-35 Low Voltage Terminal Strip..................... Page 11 IX MAINTENANCE............................... Page 35 Low Voltage Fuse............................. Page 11 Filters........................................ Page 35 Cooling Contactor............................. Page 11 Lubrication................................... Page 36 575 Volt Autotransformer...................... Page 12 Electric Heat.................................. Page 36 Indoor Blower Relay........................... Page 12 Evaporator Coil............................... Page 36 Potential Relay................................ Page 12 Condenser Coil............................... Page 36 Start Capacitor................................ Page 12 Electrical..................................... Page 36 Dual Capacitor................................ Page 12 X ACCESSORIES................................ Page 36 Compressor Run Capacitor..................... Page 13 Lifting Lugs................................... Page 36 Condenser Fan Capacitor...................... Page 13 RMF16 Roof Mounting Frame............... Pages 36-37 Cooling Components....................... Pages 13-17 Economizers............................... Pages 37-46 Compressor.................................. Page 15 Condenser Coil Guard Kit...................... Page 46 Loss of Charge Switch......................... Page 15 Compressor Crankcase Heater................. Page 46 Condenser Coil............................... Page 15 DF16 Downflow Filter Kit....................... Page 46 Evaporator Coil............................... Page 16 Timed-off Control Kit........................ Page 46,47 Thermometer Well............................ Page 17 Optional Compressor Monitor............... Pages 46,48 Fan and Blower Components................ Pages 17-18 Low Ambient Kit........................... Pages 49,50 Condenser Fan and Motor..................... Page 17 Roof Curb Power Kit........................... Page 51 Condenser Fan Motor Capacitor................ Page 17 Transitions and Supply/Return Diffusers........ Page 51 Blower Motor.............................. Pages 17,18 Status Panels.............................. Pages 51-60 Blower Motor Capacitor....................... Page 18 XI FIELD WIRING............................. Pages 61-67 III OPTIONAL ECH16 ELECTRIC HEAT............. Page 18 XII WIRING DIAGRAMS AND SEQUENCE OF OPERATION Matchups and Ratings......................... Page 18 Components............................... Pages 18-29 Wiring Diagrams and Sequence of Operation Pages 68 101 Basic Residential Unit with Basic Thermostat. Pages 68,69 Conventional Relays........................... Page 18 CHA16H with Three-Position Economizer..... Pages 70,71 Electric Heat Specification Tables............ Pages 19-23 CHA16H with Modulating Economizer....... Pages 72,73 Electric Heat Parts Arrangements............ Pages 24-27 Basic Single-Phase Commercial Unit......... Pages 74,75 Thermal Heat Relays.......................... Page 27 Basic 208/230V Three-Phase Commercial Unit Pages 75,76 Resistor...................................... Page 28 Basic 460V or 575V Commercial Unit......... Pages 78,79 Pilot Relay.................................... Page 28 Basic Three-Position Economizer Operation.. Pages 80,81 Time Delay................................... Page 28 Basic Modulating Economizer Operation..... Pages 82,83 Current Limiting Fuses......................... Page 28 Warm Up Kit Operation with 3-Position Econ. Pages 84,85 Primary High Temperature Limit............. Pages 28,29 Warm Up Kit Operation with Modulating Econ Pages 85,86 Secondary High Temperature Limit............. Page 29 Night Kit Operation......................... Pages 87,88 Thermal Cutoff................................ Page 29 Electric Heat Operation.................... Pages 90-101 Page 1 1991 Lennox Industries Inc.
ARI Standard 270 SRN (bels) *ARI Standard 210 Ratings SPECIFICATIONS CHA16H RESIDENTIAL HORIZONTAL ONLY UNITS Model No. CHA16H 261 CHA16H 311 Total Cooling Capacity (Btuh) Total unit watts SEER (Btuh/Watts) EER (Btuh/Watts) Refrigerant (R 22) charge Evaporator Blower Evaporator Coil Condenser Coil Condenser Fan Blower wheel nominal diameter x width (in.) Motor horsepower Air volume range (cfm) Net face area (sq. ft.) Tube diameter (in.) & Number of rows Fins per inch Net face area (sq. ft.) Tube diameter (in.) & Number of rows Fins per inch Diameter (in.) & Number of blades Air volume (cfm) Motor horsepower Motor watts Condensate drain size mpt (in.) Electrical characteristics Optional Electric Heat Ratings ECH16R 5 ECH16R 7 ECH16R 10 ECH16 15 Output Btuh A.F.U.E. Output Btuh A.F.U.E. Output Btuh A.F.U.E. Output Btuh A.F.U.E. Line voltage data Recommended max. fuse size (amps) Minimum circuit ampacity Optional Lifting Lug Kit Optional Condenser Coil Guards Optional Duct Enclosure Number and size of filters (in.) Optional Roof Mounting Frame (used with RDE16 41 only) Optional Model 3 position Economizer No. Modulating Dampers Number and Indoor with Gravity Exhaust size of filters (in.) Outdoor Step Down Optional Ceiling Supply and Flush Return Air Diffusers Transition Optional Outdoor Air Dampers (manual) Annual Fuel Utilization Efficiency based on DOE test procedures and FTC labeling regulations. Two stage cooling thermostat required with economizer applications. Sound Rating Number in accordance with ARI Standard 270. Indoor filter is not furnished and must be field provided. 7.8 23,200 2650 9.8 8.7 2 lbs. 12 oz. 9 x 7 1/3 600 1000 3.20 3/8 2 15 6.80 3/8 1 20 18 4 2100 1/6 200 3/4 30 19.0 208/230 volts 60 hz 1 phase LB 62125DB LB 82199CA RDE16 41 (1) 20 x 24 x 1 (fiberglass) RMF16 41 REMD16 41 REMD16M 41 (1) 16 x 25 x 1 (1) 14 x 25 x 1 (aluminum mesh) *Rated in accordance with ARI Standard 210 and DOE; 95 F outdoor air temperature and 80 F db/67 F wb entering evaporator air. **For LPG units a field changeover kit is required and must be ordered extra. 19,000 99.0% 25,000 99.0% 35,000 99.0% 52,000 99.0% RTD9 65 FD9 65 SRTH16 65 OAD3 46/65 7.8 28,600 250 9.70 8.80 3 lbs. 10 oz. 9 x 8 1/3 750 1250 3.20 3/8 2 17 6.80 3/8 1.60 20 18 4 2000 1/6 160 3/4 19,000 99.0% 25,000 99.0% 35,000 99.0% 52,000 99.0% 30 20.0 Page 2
SPECIFICATIONS CHA16R RESIDENTIAL UNITS Model No. ARI Standard 270 SRN (bels) *ARI Total Cooling Capacity (Btuh) Standard Total unit watts 210 SEER (Btuh/Watts) Ratings EER (Btuh/Watts) Refrigerant (R 22) charge Blower wheel nom. dia. x width (in.) Evaporator Motor horsepower Blower Air volume range (cfm) Net face area (sq. ft.) Evaporator Tube dia. (in.) & Number of rows Coil Fins per inch Outer coil Net face area (sq. ft.) Inner coil Condenser Tube dia. (in.) & Number of rows Coil Fins per inch Diameter (in.) & Number of blades Condenser Air volume (cfm) Fan Motor horsepower Motor watts Condensate drain size mpt (in.) Line voltage Recommended max. fuse size (amps) data Minimum circuit ampacity Electrical characteristics Output Btuh ECH16R 5 A.F.U.E. Output Btuh ECH16R 7 A.F.U.E. Optional Electric Heat Ratings ECH16R 10 ECH16 15 ECH16R 10 ECH16 15 Optional Lifting Lug Kit Optional Condenser Coil Guards Output Btuh A.F.U.E. Output Btuh A.F.U.E. Output Btuh A.F.U.E. Output Btuh A.F.U.E. Optional Downflow Adaptor Kit Model no, Filters Optional Outdoor Air Dampers (manual) CHA16R 411 7.8 34,000 3910 9.60 8.70 4 lbs. 12 oz. 10 x 7 1/3 900 1500 4.10 3/8 2 15 8.60 3/8 2 20 20 4 2200 1/6 220 3/4 45 27.0 LB 82199CB OAD16 41 CHA16R 511 8.0 46,500 5470 9.50 8.50 5 lbs. 9 oz. 10 x 8 1/2 1200 2000 5.80 3/8 2 15 14.30 3/8 1.4 20 24 4 4000 1/4 340 3/4 60 36.0 208/230 volts 60 hz 1 phase DF16 65, (1) 20x25x1 LB 62125DB(polyurethane) LB 82199CC OAD16 65 CHA16R 651 8.0 56,000 6665 9.4 8.40 7 lbs. 0 oz. 12 x 8 3/4 1500 2500 5.80 3/8 2 15 14.30 8.40 5.90 13.80 19,000 99.0% 26,000 99.0% 36,000 99.0% 53,000 99.0% 70,000 99.0% DF16 41, (1) 16x25x1 (polyurethane) 27,000 99.0% 37,000 99.0% 54,000 99.0% 71,000 99.0% 88,000 99.0% 3/8 2 20 24 4 3600 1/4 360 3/4 60 42.0 27,000 99.0% 37,000 99.0% 54,000 99.0% 71,000 99.0% 88,000 99.0% Annual Fuel Utilization Efficiency based on DOE test procedures and FTC labeling regulations. Sound Rating Number in accordance with ARI Standard 270. *Rated in accordance with ARI Standard 210 and DOE; 95 F outdoor air temperature and 80 F db/67 F wb entering evaporator air. **For LPG units a field changeover kit is required and must be ordered extra. Page 3
Model No. ARI Standard 270 SRN (bels) *ARI Standard 210 Ratings Refrigerant (R 22) charge Evaporator Blower Evaporator Coil Condenser Coil Condenser Fan Total Cooling Capacity (Btuh) Total unit watts SEER (Btuh/Watts) EER (Btuh/Watts) Blower wheel nominal dia. x width (in.) Motor horsepower Air volume range (cfm) Net face area (sq. ft.) Tube dia. (in.) & No of rows & Fins/in. Net face area (sq. ft.) outer/inner Tube diameter (in.) & Number of rows Fins per inch Diameter (in.) & Number of blades Air volume (cfm) Motor horsepower & Motor watts Condensate drain size mpt (in.) Recommended max. Line voltage fuse size (amps) Data (60hz) Minimum circuit ampacity Electrical characteristics ECH16R 5 ECH16R 7 SPECIFICATIONS CHA16 COMMERCIAL UNITS 208/230v 1 ph 3 ph 460v 3 ph 1 ph 208/230v 3 ph 460v 3 ph Output Btuh A.F.U.E. Output Btuh A.F.U.E. Output Btuh A.F.U.E. Output Btuh CHA16 411 CHA16 413 CHA16 511 CHA16 513 CHA16 651 CHA16 653 7.8 34,000 3910 9.60 8.70 4 lbs. 12 oz. 10 x 7 1/3 900 1500 4.10 3/8 2 15 8.60/8.40 3/8 2 20 20 4 2200 1/6 240 3/4 45 *Rated in accordance with ARI Standard 210 and DOE; 95 F outdoor air temperature and 80 F db/67 F wb entering evaporator air. Older CHA16 series units use optional field installed lifting lug kit LB 62125DB. 8.0 46,500 5470 9.50 8.50 5 lbs. 9 oz. 10 x 8 1/2 1200 2000 5.80 3/8 2 15 14.30/5.90 3/8 1.40 20 24 4 4000 1/4 340 3/4 60 8.0 56,000 6665 9.40 8.40 7 lbs. 0 oz. 12 x 8 3/4 1500 2500 5.80 3/8 2 15 14.30/13.80 3/8 2 20 24 4 3600 1/4 360 3/4 60 30 40 45 15 20 25 27.0 36.0 42.0 20.0 26.0 29.0 10.0 14.0 16.0 208/230 volts 60 hz 1 or 3 phase 460 or 575 volts 3 phase 19,000 99.0% 26,000 99.0% 36,000 27,000 99.0% 37,000 27,000 99.0% 37,000 Optional ECH16R 10 Electric 99.0% 99.0% 99.0% 53,000 54,000 54,000 Heat ECH16 15 A.F.U.E. Ratings 99.0% 99.0% 99.0% Output Btuh 70,000 71,000 71,000 ECH16R 10 A.F.U.E. 99.0% 99.0% 99.0% ECH16 15 Output Btuh 88,000 88,000 A.F.U.E. 99.0% 99.0% Lifting Lugs (Brackets) Optional Condenser Coil Guards Furnished, Field Installed LB 82199CB Furnished, Factory Installed LB 82199CC Number and Size of Filters (in.) (1) 16x25x1 (polyurethane) (1) 20x25x1 (polyurethane) Optional Roof Mounting Frame RMF16 41 RMF16 41 or RMF16 65 3 position REMD16 41 REMD16 65 Optional Economizer Model No. Modulating REMD16M 41 REMD16M 65 Dampers No. & size Indoor (1) 14 x 25 x 1 (polyurethane) (1) 18 x 25 x 1 (polyurethane) of filters (in.) Outdoor (1) 14 x 25 x 1 (aluminum mesh) (1) 18 x 25 x 1 (aluminum mesh) Optional 3 position EMDH16 41 EMDH16 65 Horizontal Modulating EMDH16M 41 EMDH16M 65 Economizer Model No. No. & size Indoor (1) 20 x 24 x 1 (fiber glass) (1) 16 x 25 x 1 & (1) 14 x 25 x 1 (fiber glass) Dampers of filters (in.) Outdoor (1) 8 x 24 x 1 (aluminum mesh) (1) 8 x 28 x 1 (aluminum mesh) Optional Outdoor Air Dampers (manual) OAD16 41 OAD16 65 Step Down RTD9 65 Optional Ceiling Supply and Return Air Diffusers Flush FD9 65 Transition SRT16 65 Electromechanical Thermostat Honeywell W973 Control System with T7067 Thermostat Optional Controls Selection Honeywell W7400 Control System with T7400 Thermostat Flexstat Thermostat (discontinued as an option after August 1989) Prostat Thermostat T7300 Thermostat Downflow application 23H13 23H14 Optional Control Mounts Horizontal application 24H61 Commercial Controls Furnished Factory Installed Optional Gravity Exhaust Dampers GEDH16 65 (use with EMDH16 or EMDHM16) Optional Roof Curb Power Entry Kit Annual Fuel Utilization Efficiency based on DOE test procedures and FTC labeling regulations. 18H70 (1/2 ) Furnished as standard.consists of: factory installed controls wiring harness, high pressure switch, loss of charge switch, low voltage terminal strip and compressor crankcase heater. Sound Rating Number in accordance with ARI Standard 270. Page 4
Model No. ELECTRICAL DATA CHA16H 261 311 AND CHA16(R) 411 511 651 MODELS SINGLE PHASE VOLTAGE CHA16H-261 CHA16H-311 CHA16(R) 411 CHA16(R) 511 CHA16(R) 651 Line Voltage Data - 60Hz. 1ph Rated Load Amps Compressor Locked Rotor Amps Condenser Full Load Amps Fan Motor Locked Rotor Amps Evaporator Full Load Amps Blower Locked Rotor Amps Recommended Max. Fuse Size (amps) Unit Power Factor *Minimum Circuit Ampacity 208/230v 208/230v 12.1 13.5 57.0 77.4.09.90 1.5 1.5 2.1 2.1 4.6 4.6 30 30.99.95 19.0 20.0 208/230v 17.9 83.5 1.1 2.2 3.0 6.2 40.95 27.0 208/230v 23.4 118.0 2.3 4.4 3.9 8.3 50.92 36.0 208/230v 27.6 135.0 2.3 4.4 4.6 10.0 60.97 42.0 Model No. CHA16 413 513 653 MODELS THREE PHASE VOLTAGE CHA16-413 CHA16-513 CHA16-653 Line Voltage Data - 60Hz. 3ph 208/230v 460v 575v 208/230v 460v 575v 208/230v 460v Compressor Rated Load Amps 11.3 5.2 4.5 15.4 8.4 6.5 17.7 9.4 Locked Rotor Amps 66.0 35.0 29.0 90.0 45.0 36.0 105 55 Condenser Full Load Amps 1.1 0.70 0.7 2.3 1.1 1.1 2.3 1.1 Fan Motor Locked Rotor Amps 2.2 1.3 1.3 4.4 2.0 2.0 4.4 2.0 Evaporator Full Load Amps 3.0 1.8 1.8 3.9 1.8 1.8 4.6 1.8 Blower Locked Rotor Amps 6.2 4.4 4.4 8.3 4.4 4.4 10.0 3.8 Recommended Max. Fuse Size (amps) 25 15 15 40 20 15 45 20 Unit Power Factor.86.87.86.88.88.88.89.89 *Minimum Circuit Ampacity 19.0 9.0 9.0 26.0 14.0 12.0 30.0 15.0 Where current does not exceed 60 amps, HACR circuit breaker may be used in place of fuse. NOTE Extremes of operating range are plus and minus 10% of line voltage. *Refer to National Electrical Code manual to determine wire, fuse and disconnect size requirements. Motors are rated at 460 volts. Full Load Amps shown are for step-down transformer output. 575v 6.3 45.0 1.1 2.0 1.8 3.8 15.89 11.0 Unit Model No. CHA16H 261 CHA16H 311 CHA16 410 CHA16 510 CHA16 650 Air Volume (cfm) 800 1000 1200 800 1000 1200 1400 1600 1800 2000 2200 With 1 Filter.15.18.21.15.18.21.25.20.23.27.32 REMD16 Downflow Economizer Without Filter.05.06.09.05.06.09.15.05.06.08.10 NOTE Electric heaters have no appreciable air resistance. *Air resistance is with air filter in place. Air resistance is with pleated non-woven cotton fabric filter. With Pleated 2 Filter.27.34.42.51.40.48.56.66 ACCESSORY AIR RESISTANCE With Fiberglass 2 Filter.25.29.36.47.36.41.47.54 Total Resistance (inches water gauge) EMDH16 Economizer Downflow With 1 Filter.18.26.35.46.30.35.40.47 Without Filter.10.15.21.29.17.19.22.26 *RDE16 41 Duct Enclosure.11.19.22 DF16 Downflow Filter Adaptor Kit With 1 Filter.15.18.21.25.15.17.20.23 With Pleated 2 Filter.27.34.42.51.35.42.49.57 With Fiberglass 2 Filter.13.18.24.31.22.27.32.37 Wet Evaporator Coil.08.09.10.08.09.10.11.09.10.11.12 Page 5
Unit Model Number CHA16H-261 CHA16H-311 CHA16-410 CHA16-510 CHA16-650 DIFFUSER AIR RESISTANCE Air Volume (cfm) 800 1000 1200 800 1000 1200 1400 1600 1800 2000 2200 2 Ends Open.15.19.25.15.19.25.33.43.56.73.95 RTD9 65 Diffuser 1 Side 2 Ends Open.13.16.20.13.16.20.26.32.40.50.63 All Ends & Sides Open.11.14.17.11.14.17.20.24.30.36.44 FD9 65 Diffuser.11.14.17.11.14.17.20.24.30.36.44 CHA16H-261 BLOWER PERFORMANCE @ 230 VOLTS (With Horizontal Supply and Return Air Openings) External Static Air Volume (cfm) @ Various Speeds Pressure(in. wg) High Med High Med Low Low 0 1345 1000 880 710.05 1320 995 870 705.10 1290 995 855 695.15 1265 985 845 690.20 1240 975 830 680.25 1210 960 815 670.30 1180 940 795 660.40 1120 895 760 630.50 1055 840 710 585.60 975 570 645 525.70 880 525 565 450.75 825 475 515 405 NOTE All cfm data is measured external to unit. CHA16(R)-411-413 BLOWER PERFORMANCE @ 230 VOLTS (With Horizontal Supply and Return Air Openings) External Static Air Volume (cfm) @ Various Speeds Pressure(in. wg) High Med High Med Low Low 0 1490 1460 1145 920.05 1470 1440 1135 910.10 1450 1420 1125 900.15 1435 1395 1120 895.20 1430 1375 1115 890.25 1400 1375 1105 880.30 1380 1355 1095 870.40 1335 1335 1070 850.50 1285 1285 1030 830.60 1235 1235 985 790.70 1185 1140 935 730.75 1160 1110 905 690 NOTE All cfm data is measured external to unit. CHA16(R)-511-513 BLOWER PERFORMANCE @ 230 VOLTS (With Horizontal Supply and Return Air Openings) External Static Air Volume (cfm) @ Various Speeds Pressure(in. wg) High Med High Med Low Low 0 2140 1785 1535 1305.05 2115 1770 1530 1300.10 2090 1755 1520 1295.15 2070 1745 1510 1290.20 2045 1730 1500 1285.25 2020 1715 1490 1280.30 1995 1700 1480 1275.40 1935 1665 1460 1260.50 1875 1630 1430 1235.60 1800 1585 1400 1205.70 1710 1530 1370 1170.75 1655 1495 1355 1150 NOTE All cfm data is measured external to unit. CHA16H-311 BLOWER PERFORMANCE @ 230 VOLTS (With Horizontal Supply and Return Air Openings) External Static Air Volume (cfm) @ Various Speeds Pressure(in. wg) High Med High Med Low Low 0 1530 1065 905 720.05 1505 1060 905 720.10 1475 1050 905 720.15 1450 1040 900 715.20 1425 1030 900 715.25 1400 1020 895 710.30 1375 1010 890 705.40 1310 980 865 680.50 1240 940 825 645.60 1135 880 760 590.70 1025 800 670 515.75 975 750 610 465 NOTE All cfm data is measured external to unit. CHA16(R)-411-413 BLOWER PREFORMANCE @ 230 VOLTS (With Down Flow Supply and Return Air Openings) External Static Air Volume (cfm) @ Various Speeds Pressure(in. wg) High Med High Med Low Low 0 1415 1350 1135 915.05 1395 1335 1125 905.10 1375 1315 1115 895.15 1360 1290 1110 890.20 1355 1275 1105 885.25 1325 1255 1095 875.30 1310 1235 1085 865.40 1265 1195 1060 845.50 1220 1155 1020 825.60 1170 1105 975 785.70 1115 1045 925 725.75 1085 1010 895 685 NOTE All cfm data is measured external to unit. Page 6
CHA16(R)-511-513 BLOWER PERFORMANCE @ 230 VOLTS (With Down Flow Supply and Return Air Openings) External Static Air Volume (cfm) @ Various Speeds Pressure(in. wg) High Med High Med Low Low 0 2065 1715 1515 1305.05 2055 1705 1505 1300.10 2040 1690 1495 1300.15 2020 1680 1485 1295.20 2000 1665 1475 1290.25 1975 1650 1470 1285.30 1950 1635 1450 1280.40 1885 1600 1425 1260.50 1810 1565 1395 1225.60 1730 1525 1360 1175.70 1645 1600 1320 1110.75 1600 1455 1295 1070 NOTE All cfm data is measured external to unit. CHA16-413 BLOWER PERFORMANCE @ 460/575 VOLTS (With Horizontal Supply and Return Air Openings) External Static Air Volume @ Various Speeds Pressure (in. wg) High Medium Low 0 1710 1590 1105.05 1685 1565 1105 10 1655 1535 1105.15 1630 1510 1100.20 1610 1490 1095.25 1570 1470 1085.30 1540 1445 1075.40 1475 1385 1040.50 1405 1330 1010.60 1335 1260 960.70 1240 1185 885.75 1180 1150 825 NOTE All cfm data is measured external to unit. CHA16-513 BLOWER PERFORMANCE @ 460/575 VOLTS (With Horizontal Supply and Return Air Openings) External Static Air Volume @ Various Speeds Pressure (in. wg) High Medium Low 0 2160 1815 1210.05 2125 1800 1210.10 2095 1790 1200.15 2060 1780 1200.20 2025 1760 1195.25 1990 1745 1190.30 1955 1730 1185.40 1885 1690 1170.50 1805 1640 1140.60 1715 1575 1105.70 1615 1495 1065.75 1560 1445 1040 NOTE All cfm data is measured external to unit. CHA16-653 BLOWER PERFORMANCE @ 460/575 VOLTS (With Horizontal Supply and Return Air Openings) External Static Air Volume @ Various Speeds Pressure (in. wg) High Medium Low 0 2850 2430 1940.05 2805 2385 1920.10 2760 2345 1905.15 2715 2310 1885.20 2670 2275 1870.25 2640 2240 1850.30 2605 2210 1825.40 2515 2140 1775.50 2445 2120 1710.60 2355 1990 1600.70 2270 1920 1590.75 2225 1880 1545 NOTE All cfm data is measured external to unit. CHA16-413 BLOWER PERFORMANCE @ 460/575 VOLTS (With Down Flow Supply and Return Air Openings) External Static Air Volume @ Various Speeds Pressure (in. wg) High Medium Low 0 1625 1465 1100.05 1600 1445 1100.10 1570 1420 1100.15 1455 1395 1095.20 1525 1385 1090.25 1485 1365 1075.30 1465 1340 1070.40 1400 1285 1035.50 1335 1235 1005.60 1260 1165 955.70 1170 1085 875.75 1100 1045 815 NOTE All cfm data is measured external to unit. CHA16-513 BLOWER PERFORMANCE @ 460/575 VOLTS (With Down Flow Supply and Return Air Openings) External Static Air Volume @ Various Speeds Pressure (in. wg) High Medium Low 0 2140 1745 1175.05 2120 1730 1175.10 2080 1720 1170.15 2045 1710 1170.20 2005 1695 1165.25 1975 1680 1160.30 1940 1665 1150.40 1870 1625 1135.50 1790 1580 1110.60 1705 1515 1075.70 1615 1430 1030.75 1565 1375 1000 NOTE All cfm data is measured external to unit. Page 7
CHA16-653 BLOWER PERFORMANCE @ 460/575 VOLTS (With Down Flow Supply and Return Air Openings) External Static Air Volume @ Various Speeds Pressure (in. wg) High Medium Low 0 2725 2405 1905.05 2680 2365 1890.10 2635 2325 1870.15 2590 2290 1855.20 2550 2255 1840.25 2515 2220 1820.30 2485 2190 1795.40 2395 2120 1745.50 2325 2050 1680.60 2235 1970 1570.70 2150 1900 1560.75 2100 1860 1515 NOTE All cfm data is measured external to unit. CHA16(R)-651-653 BLOWER PERFORMANCE@ 230 VOLTS (With Down Flow Supply and Return Air Openings) External Static Air Volume (cfm) @ Various Speeds Pressure (in. wg) High Med High Med Med Low Low 0 2725 2490 2235 1940 1620.05 2695 2435 2210 1930 1625.10 2665 2430 2185 1925 1625.15 2635 2415 2160 1910 1610.20 2600 2395 2140 1895 1590.25 2555 2365 2130 1880 1580.30 2510 2335 2115 1865 1565.40 2445 2275 2060 1830 1540.50 2385 2230 2005 1765 1505.60 2285 2140 1940 1725 1455.70 2210 2075 1880 1660 1405.75 2175 2030 1845 1615 1370 NOTE All cfm data is measured external to unit. CHA16(R)-651-653 BLOWER PERFORMANCE@ 230 VOLTS (With Horizontal Supply and Return Air Openings) External Static Air Volume (cfm) @ Various Speeds Pressure (in. wg) High Med High Med Med Low Low 0 2850 2530 2255 1970 1640.05 2820 2475 2230 1965 1645.10 2790 2475 2205 1955 1645.15 2760 2455 2180 1940 1630.20 2725 2435 2160 1925 1610.25 2680 2405 2150 1910 1600.30 2630 2375 2135 1895 1585.40 2570 2315 2080 1860 1560.50 2510 2270 2025 1795 1525.60 2410 2180 1960 1755 1475.70 2335 2115 1900 1690 1425.75 2300 2070 1865 1650 1390 NOTE All cfm data is measured external to unit. CHA16H PARTS ARRANGEMENT CONDENSER FAN OPTIONAL RETURN CHA16 410 AND CHA16 510/650 PARTS ARRANGEMENT OPTIONAL SUPPLY SUPPLY EVAPORATOR COIL SUPPLY COMPRESSOR RETURN DRAIN CONTROL SUPPLY BOX BLOWER CONTACTOR EVAPORATOR COIL OPTIONAL ELECTRIC HEAT BLOWER RETURN FIGURE 1 Page 8 CONTROL BOX OPTIONAL ELECTRIC HEAT CONDENSER COIL COMPRESSOR
I APPLICATION CHA16 2 5 ton units are available in three model and three cabinet sizes (refer to the Engineering Handbook for more specific application data). CHA16H models are available only in the smallest cabinet and are applicable for residential installations with horizontal supply and discharge air only. CHA16H units are singlephase only and are not equipped for installation of Lennox optional thermostat control systems. CHA16R models are residential only units available in both the small and large convertible (downflow or horizontal) cabinets. CHA16R models, like the CHA16H models, are single-phase only and are not equipped for installation of Lennox optional thermostat control systems. CHA16 models are residential or commercial units available in single or three-phase and available in both the small and large convertible (downflow or horizontal) cabinets. CHA16 models are factory equipped with the hardware required for installing Lennox optional thermostat control systems. Lennox optional thermostat control systems are the same controls, harnesses, and harness plugs used in all 16 series commercial air conditioners, heat pumps and gas/electrics. For example, a Honeywell W973 control will plug in to a CHA16 411 as easily as it will plug in to a CHA16 1853 (and no field wiring is required for either). II UNIT COMPONENTS CHA16 unit components are shown in figure 1. A Control Box Components CHA16H control box is shown in figure 2. The control box is located adjacent to the compressor compartment behind the electric heat access panel. CHA16R 411 and CHA16 410 control box is shown in figures 3 and 4. CHA16R 511/651 and CHA16 510/650 control box is shown in figures 5 and 6. In both units, the control box is located in the heating compartment behind the heating compartment access panel. The indoor blower access panel (all units) is located on the opposite side of the unit from the control box access. Figure 1 shows typical blower compartment access. CHA16H CONTROL BOX C1 CAPACITOR WIRING GROMMET K3 BLOWER RELAY C5 CAPACITOR T1 TRANSFORMER ELECTRIC HEAT SECTION K1 CONTACTOR FIGURE 2 Page 9
CHA16R 411 CONTROL BOX COMPONENTS WIRING GROMMET K3 BLOWER RELAY C12 DUAL CAPACITOR F1 FUSE T1 TRANSFORMER ELECTRIC HEAT SECTION K1 COMPRESSOR CONTACTOR FIGURE 3 WIRING GROMMET T1 TRANSFORMER CHA16 411/413 CONTROL BOX COMPONENTS C12 DUAL CAPACITOR (-411 Units) C1 FAN CAPACITOR (-413 UNITS) F1 FUSE K3 BLOWER RELAY T4 AUTO TRANSFORMER (CHA16 413 1J only) TB1 TERMINAL BOARD WIRING GROMMET K31 POTENTIAL RELAY K3 BLOWER RELAY FIGURE 4 CHA16R 511/651 CONTROL BOX ELECTRIC HEAT SECTION K1 COMPRESSOR CONTACTOR C7 START CAPACITOR C12 DUAL CAPACITOR F1 FUSE T1 TRANSFORMER FIGURE 5 ELECTRIC HEAT SECTION K1 COMPRESSOR CONTACTOR Page 10
K3 BLOWER RELAY WIRING GROMMET CHA16 511/513/651/653 CONTROL BOX K31 POTENTIAL RELAY CHA16 511/651 units only C7 START CAPACITOR CHA16 511/651 units only T4 AUTO TRANSFORMER (CHA16 513/653 575v only) LOCATION FOR P AND Y VOLTAGE T1 TRANSFORMER F1 FUSE TB1 TERMINAL BOARD 1 Transformer T1 K1 COMPRESSOR CONTACTOR FIGURE 6 3 Transformer Fuse F1 LOCATION FOR G AND J VOLTAGE C12 DUAL CAPACITOR (CHA16 511/651 only) OR C1 CAPACITOR (CHA16 513/653 only) CHA16 series units use a single line voltage to 24VAC transformer located in the control box. The transformer supplies power to control circuits in the unit. Transformers are rated as shown in table 1. P voltage (208/230V) transformers use two primary voltage taps as shown in figure 7. Unit CHA16H-261 CHA16H-311 CHA16R-411/511/651 CHA16-411P/413Y CHA16-511P/513Y CHA16-651P/653Y CHA16-413G CHA16-513/653G CHA16-413/513/653J 2 Terminal Strip TB1 208 / 230 VOLT TRANSFORMER PRIMARY ORANGE 240 VOLTS RED 208 VOLTS BLACK TABLE 1 T1 TRANSFORMER RATING Primary Secondary 230VAC FIGURE 7 24VAC SECONDARY YELLOW BLUE VA Rating Internal Fuse 45 No Fuse 208/ 230VAC 24VAC 70 3.5A 480VAC 24VAC 70 3.5A 440VAC 24VAC 48 2.5A 575VAC 24VAC 70 3.5A All CHA16 commercial units are equipped with a low voltage terminal strip (TB1). The strip is used for making up all indoor thermostat and outdoor unit low voltage control wiring connections (see figures 4 and 6). The terminal strip is located at the bottom left corner of the control box. Transformers used in CHA16H and CHA16R units are not equipped with internal secondary voltage overcurrent protection. Transformers in all other units are equipped with an integral fuse connected in series with the blue secondary voltage wire. The fuse may be accessed outside the transformer and is rated as shown in table 1. 4 Cooling Contactor K1 K1 is a 24V to line voltage contactor used to energize the compressor and condenser fan in response to thermostat demand. Three-phase units use three-poledouble-break contactors. Single-phase units use single-pole contactors. WARNING Electric shock hazard. Can cause injury or death. Single-phase units are equipped with single-pole contactors. One leg of compressor, capacitor and condenser fan are always connected to line voltage. Turn off power at disconnect before servicing. NOTE Contactor K1 is energized by the thermostat control system. Depending on the control system installed, the contactors may or may not be immediately energized upon demand. Refer to the operation sequence for the control system installed. Page 11
5 Autotransformer T4 CHA16 413 (575V) units use a line voltage to 460V autotransformer to power the indoor blower. The autotransformer is connected directly to line voltage and is powered at all times. It has a maximum VA rating of 3.4A. See figure 8. AUTOTRANSFORMER T4 CHA16 413 1J ONLY BROWN 460V 575V BLACK FIGURE 8 6 Indoor Blower Relay K3 (Cooling Speed) 208/230 volt units use a single 2PDT relay to energize the indoor blower motor. 460 volt and 575 volt units use a single 3PDT relay. The relay coil is energized by blower demand from indoor thermostat terminal G (cooling demand or fan switch in ON position). When the coil is energized, a set of N.O. contacts closes to energize the blower motor on high speed. When there is a demand for heat, the blower is energized by the blower relay located inside the electric heat section of the unit. 460 (G) and 575(J) voltage units use a unique blower motor. The motor utilizes a set of N.C. relay contacts (K3) to complete an internal circuit when the motor is on low or medium (heating) speed. 7 Potential Relay K31 Relay K31 is used in single-phase 511 and 651 units only and is located in the control box. It is a potential relay which controls the operation of the starting circuit. The relay is normally closed when the compressor (contactor K1) is de energized. Capacitor (C7) is connected to a set of N.C. K31 contacts and is used to assist the compressor in starting. When K1 energizes, the compressor immediately begins startup. K31 remains de energized during compressor start up and the start capacitor (C7) remains in the circuit. As the compressor gains speed K31 is energized by electromotive forces generated by the compressor. When K31 energizes, its contacts open to take the start capacitor out of the circuit. 8 Start Capacitor C7 TABLE 2 Unit CHA16-511 CHA16R-511 CHA16-651 CHA16R-651 Start Capacitor Ratings C7 Start Capacitor Rating 135-155 MFD. @ 320 VAC 176-216 MFD. @ 320 VAC RED All single-phase units (size 511 and larger) use a compressor start capacitor (C7) connected in parallel with the compressor side of dual capacitor C12. The start capacitor is energized during compressor startup and is switched off by potential relay K31 when the compressor nears full speed. Three-phase units do not use start capacitors. Table 2 shows start capacitor ratings for single-phase CHA16s. The capacitor is mounted in the unit control box. See figures 5 and 6 for capacitor location. NOTE Before servicing unit, be sure to identify the compressor and fan sides of dual capacitor C12. The start capacitor uses a 15K ohm 2 watt bleed resistor connected in parallel with the capacitor terminals. A resistor is used to slowly discharge the capacitor when not in use. 9 Dual Capacitor C12 CHA16 and CHA16R three, four and five ton singlephase units use permanent split capacitor (PSC) motors in both compressor and condenser fan. A single dual capacitor is used for both. A dual capacitor is two independent capacitors inside one can. The fan side of the capacitor and the compressor side of the capacitor have different ratings. The capacitor is located inside the compressor compartment. Refer to table 3. See figures 3, 4, 5 and 6 for location. TABLE 3 Run Capacitor Ratings Unit CHA16H-261 CHA16H-311 CHA16-511 CHA16R-511 CHA16-651 CHA16R-651 CHA16-411 CHA16R-411 CHA16H-261 CHA16H-311 CHA16-413Y CHA16-413G/413J CHA16-513Y/513G/513J CHA16-653Y/653G/653J Key Number C5 C5 C12 C12 C12 C1 C1 Type/ Rating Single Capacitor 30 mfd compressor @ 370V Single Capacitor 35 mfd compressor @ 370V Dual Capacitor 40 mfd compressor 7.5 mfd fan @ 440V Dual Capacitor 45 mfd compressor 7.5 mfd fan @ 440V Dual Capacitor 40 mfd compressor 5 mfd fan @ 370V Single Capacitor 5 mfd fan @ 370V Single Capacitor 7 mfd fan @ 370V Page 12
10 Compressor Run Capacitor C5 All single-phase units use permanent-split-capacitor compressor motors which require run capacitors to maximize compressor efficiency. Three ton and larger units use the compressor side of dual capacitor C12 while units smaller than three tons use a single run capacitor C5. Table 3 shows C5 run capacitors used in CHA16 single-phase units. Three-phase units do not use run capacitors. See figures 2 through 6 for capacitor location. 11 Fan Capacitor C1 All three-phase CHA16 units use single-phase PSC condenser fan motors. Motors are equipped with a fan run capacitor to maximize motor efficiency. The fan capacitor is located in the compressor compartment and is electrically connected as shown in the unit wiring diagram. Capacitor ratings are shown in table 3. In some single phase units, the fan capacitor is combined with the compressor run capacitor in C12. Refer to dual capacitor C12. B Cooling Components Summary of Features All units use DX cooling. Cooling in commercial units (CHA16) may also be supplemented by field-installed economizer. CHA16H 261/311, CHA16 411/413 and CHA16R 411 units use a single slab type enhanced fin evaporator with rifled tubing and capillary cap tubes as the primary expansion device (figure 10). CHA16R 511/651 and CHA16 511/513/651/653 units use a single slab type enhanced fin evaporator with rifled tubing and a thermal expansion valve TXV as the primary expansion device (figure 9). CHA16R and CHA16H series units are not equipped with crankcase heater, high pressure switch or loss of charge switch. All 510/ 650 units are equipped with thermometer well for charging. All models use draw through type condenser fans. PLUMBING COMPONENTS THERMAL EXPANSION VALVE SYSTEMS HIGH PRESSURE AND LOSS OF CHARGE SWITCHES USED ON CHA16 UNITS ONLY. EXPANSION VALVE SUCTION LINE GAUGE PORT CHA16-510 CHA16(R) 510/650 THERMOMETER WELL and LIQUID GAUGE PORT LIQUID LINE GAUGE PORT LIQUID LINE EVAPORATOR COIL CONDENSER COIL SUCTION LINE GAUGE PORT CHA16-650 DISCHARGE LINE LOSS OF CHARGE SWITCH (CHA16 only) HIGH PRESSURE SWITCH (CHA16 only) COMPRESSOR TERMINAL BOX FIGURE 9 Page 13
CHA16H 261 PLUMBING COMPONENTS CAPILLARY TUBE SYSTEMS SUCTION LINE EVAPORATOR COIL SUCTION LINE GAUGE PORT CONDENSER COIL CAPILLARY TUBES LIQUID LINE GAUGE PORT LIQUID LINE DISCHARGE LINE COMPRESSOR TERMINAL BOX CHA16H 311 SUCTION LINE GAUGE PORT SUCTION LINE EVAPORATOR COIL CONDENSER COIL CAPILLARY TUBES LIQUID LINE LIQUID LINE GAUGE PORT CHA16(R) 410 DISCHARGE LINE SUCTION LINE COMPRESSOR TERMINAL BOX LIQUID LINE GAUGE PORT LIQUID LINE EVAPORATOR COIL CONDENSER COIL COMPRESSOR TERMINAL BOX SUCTION LINE GAUGE PORT DISCHARGE LINE HIGH PRESSURE SWITCH (CHA16 only) LOSS OF CHARGE SWITCH (CHA16 only) FIGURE 10 Page 14
TABLE 4 CHA16 SERIES UNITS COMPRESSOR SPECIFICATIONS Unit Voltage/ Phase Locked Rotor Amps Rated Load Amps Oil Charge Fl. Oz. Viscosity Oil Type Crankcase Heater CHA16H 261 CHA16H 311 CHA16R 411 CHA16 411 CHA16 413 1Y CHA16 413 CHA16R 511 CHA16 511 CHA16 513 CHA16 513 CHA16 513 CHA16R 651 CHA16 651 CHA16 653 CHA16 653 CHA16 653 208/230/1 208/230/1 208/230/1 208/230/1 208/230/3 575/3 208/230/1 208/230/1 208/230/3 460/3 575/3 208/230/1 208/230/1 208/230/3 460/3 575/3 57.0 77.4 83.5 83.5 66.0 35.0 118.0 118.0 90.0 45.0 36.0 135.0 135.0 105.0 55.0 45.0 12.1 13.5 17.6 17.6 11.5 5.3 23.4 23.4 15.4 8.4 6.5 27.6 27.6 17.7 9.4 6.3 40 40 55 55 55 55 55 55 55 55 55 70 70 70 70 70 *** 190 210 190 210 190 210 *** ** *** *** *** ** *** * ** None 40 watt Insertion Type Self Regulating None 30 watt Insertion Type Self Regulating None 30 watt Insertion Type Self Regulating 40 watt Insertion Type Self Regulating *Texaco Capella WF 32 or Suniso 3GS or White Oil M/M Sontex 200 LT **Heat Pump Grade Mineral ***Not Specified 1 Compressor B1 Table 4 shows the specifications of compressors used in all units. Compressors used in CHA16 commercial units are equipped with insertion type crankcase heaters. All compressors are protected by internal pressure relief valves and internal overload protection circuitry. WARNING 2 High Pressure Limit S4 Electric Shock Hazard. Can cause injury or death. Do not operate without protective cover over terminals. Disconnect power before removing protective cover. Discharge capacitors before servicing unit. The high pressure limit is a manually reset SPST N.C. switch which opens on a pressure rise. All commercial units (CHA16) are equipped with the limit. CHA16R and CHA16H are not equipped with the limit. The switch is located in the compressor discharge line and is wired in series with the compressor contactor. When discharge pressure rises above 410+10 psig (indicating a problem in the system) the switch opens and the compressor is de energized ( the economizer can continue to operate.) After the problem has been found and corrected, the switch can be reset by pushing the reset button. 3 Loss of Charge Switch S24 The loss of charge switch is an auto-reset SPST N.C. switch which opens on a pressure drop. All commercial units (CHA16) are equipped with the switch. CHA16R and CHA16H are not equipped with the switch. The switch is located in the compressor discharge line and is wired in series with the high pressure switch and compressor contactor. When discharge pressure drops below 25+5 psig (indicating a loss of charge in the system) the switch opens and the compressor is de energized. The switch automatically resets when refrigerant is added and discharge line pressure rises above 55+5 psig. 4 Condenser Coil All CHA16s have a single condenser coil. Each coil has two rows (CHA16 511/513 and CHA16R 511 have 1 1/2 rows) of copper tubes fitted with ripple edged aluminum enhanced fins. Page 15
5 Evaporator Coil All CHA16s have a single slab evaporator coil. The coil has two rows of rifled copper tubes fitted with ripple edged aluminum fins. An expansion device feeds multiple parallel circuits through the coil. EVAPORATOR PLUMBING CHA16H 261, CHA16H 311, CHA16 411/413 and CHA16R 411 SUCTION LINE EVAPORATOR a Capillary Tube Systems CHA16H 261, CHA16H 311, CHA16 411/413 and CHA16R 411 units use capillary tubes as the primary expansion device in the indoor coil. Multiple cap tubes feed independent parallel circuits through the coil. Expansion takes place at the point where the cap tubes enter the coil. See figure 11. EVAPORATOR PLUMBING CHA16 511/513, CHA16 651/653 CHA16R 511 and CHA16R 651 CAP TUBES CAPILLARY TUBE EXPANSION DEVICE EVAPORATOR EVAPORATOR LIQUID LINE EXPANSION VALVE FED BY LIQUID LINE EVAPORATOR SENSING BULB STRAPPED TO SUCTION LINE CAPILLARY TUBE EXPANSION DEVICE LIQUID LINE CAP TUBES EQUALIZER LINE FEEDER TUBES SUCTION LINE FEEDER TUBES SUCTION LINE FIGURE 11 FIGURE 12 Page 16
b Expansion Valve CHA16 510 through 650 series units use a Thermal Expansion Valve (TXV) as the primary expansion device. See figure 12. 6 Thermometer Well (Figure 13) All CHA16 510/650 series units are factory equipped with a thermometer well for charging the unit. The well is used to accurately measure the temperature of the liquid line. The temperature measured is then used to calculate the approach or subcooling temperature. Approach and THERMOMETER WELL THERMOMETER WELL LIQUID LINE GAUGE PORT LIQUID LINE FIGURE 13 subcooling temperatures are compared to tables printed in the charging section of this manual to determine the correct charge. Thermometer wells are equipped with a gauge port for connection of high pressure gauge. To accurately measure the temperature of the liquid line, the well should be filled with a light mineral oil before using. This will ensure good heat transfer to the thermometer. C Fan and Blower 1 Condenser Fan and Motor B4 3 Blower Motor B3 All CHA16 series units use single-phase PSC blower motors. A single run capacitor is mounted on the blower housing. All motors use multiple speed taps. Typically, the high speed tap is energized during compressor operation and a lower speed tap is energized during heating operation. Blower motors in CHA16 261, 311, 411 and 511 units have four speed taps. Motors in CHA16 651 units have five speed taps. All 460 voltage units have three taps. Blower motor specifications are listed in table 6. Blower performance ratings are listed in the tables on pages 6, 7 and 8. TABLE 6 BLOWER MOTOR 1075 RPM CCW ROTATION Unit Motor Volts Phase HP FLA CHA16H 261 CHA16H 311 CHA16 411/413 CHA16R 411 CHA16 413 208/230 208/230 208/230 460 1 1 1 1 1/3 1/3 1/3 1/2 2.1 2.1 3.9 1.8 CHA16 511/513 CHA16R 511 CHA16 513 208/230 460 1 1 1/2 3/4 3.9 1.8 CHA16 513 575 1 3/4 0.7 CHA16 651/653 CHA16R 651 208/230 1 3/4 4.6 CHA16 653 460 1 3/4 1.8 CHA16 653 575 1 3/4 0.7 The table on pages 2, 3 and 4 in this manual show the specifications of condenser fans used in CHA16s. The condenser fan in all units is controlled by cooling contactor K1. The condenser fan can be accessed by removing the fan grill located on top of the unit. 2 Condenser Fan Motor Capacitor C1 All CHA16s use single-phase PSC condenser fan motors. Table 5 shows fan run capacitor ratings for CHA16s. TABLE 5 CONDENSER FAN MOTOR CAPACITOR Unit & Unit Voltage Type MFD @ Volts CHA16H 261 208/230 Single 7 370 CHA16H 311 208/230 Single 7 370 CHA16 411 CHA16R 411 208/230 Dual (shared with compressor) 5 370 CHA16 413 208/230 Single 5 370 CHA16 511/651 CHA16R 511/651 208/230 Single 7 370 CHA16 413/513/653 ALL Single 7 370 Page 17 A third (blue) tap on G (460V) and J (575V) volt motors is used to complete an internal circuit during low or medium speed operation. It must never be connected to line voltage. During low speed (red tap) operation, the high speed (black) tap is disconnected from line voltage and is connected to blue internal wiring tap. Internal wiring is shown in figure 14. 460 VOLT BLOWER MOTOR WINDINGS HIGH SPEED MEDIUM SPEED LOW SPEED WINDING WINDING WINDING ORANGE BLACK BLUE YELLOW RED The motor has three sets of windings. The high speed winding is independent of the other two and the medium and low speed windings are tied together with a center tap. High speed is accomplished by energizing the high speed windings. Medium speed is accomplished by connecting the medium speed and high speed windings in series. Low speed is accomplished by connecting the low, medium and high speed windings in series. Refer to unit wiring diagram and Corp. 8909 L7. FIGURE 14
CAUTION Potential for damage to 460V and 575V blower motors and/or unit electrical circuits. The blue blower motor lead must never be connected to a line voltage power lead (blower demand from heat relay or blower relay). Refer to unit wiring diagram for proper wiring. Can result in improper operation, increased current flow and/or burnt windings. 4 Indoor Blower Motor Capacitor C4 All CHA16 208/230v units use single-phase PSC motors. A run capacitor is mounted on the blower housing. Capacitor ratings are shown in table 7. 460v and 575v units use single-phase PSC 460v blower motors. A run capacitor is located on the blower housing. TABLE 7 Unit 208/230v Blower Capacitor Rating CHA16H 261/ 311 CHA16 411P/ 413Y CHA16R 411 CHA16 511P/ 513Y CHA16R 411 7 MFD at 370 V 10 MFD at 370 V 20 MFD at 370 V CHA16 651P/ 653Y CHA16R 411 20 MFD at 370 V CHA16 413G,J 10 MFD at 370 V CHA16 513G,J 10 MFD at 370 V CHA16 653G,J 20 MFD at 370 V III OPTIONAL ECH16 ELECTRIC HEAT A Matchups and Ratings Tables 8, 9, 10, 11 and 12 show all possible CHA16 to ECH16 matchups. Also shown in the tables are ECH16 electrical ratings. B Electric Heat Components ECH16 parts arrangement is shown in figures 15, 16, 17, 18, 19, 20 and 21. All ECH16 units consist of electric heating elements exposed directly to the airstream. Elements are sequenced on and off by heat relays or contactors in response to thermostat demand. 1 Relay K15 Relay K15 is a single-pole single-throw relay located on the control panel of all commercial singlephase ECH16 units (15, 20 and 25 kw). K15 is equipped with a 24VAC coil which is energized when pilot relay K43 closes. When K15 is energized, the first stage heating elements are energized. (HE1 in ECH16-15; HE1 and HE2 in ECH16-20 and ECH16-25). 2 Contactor K15 Contactor K15 is a three-pole double break contactor used in all commercial three-phase ECH16 units. K15 is equipped with a 24VAC coil which is energized when pilot relay K43 closes. When K15 is energized, the first stage heating elements are energized. Contactor K15 used in ECH16-15-1Y and ECH16-25-1G units is equipped with a set of auxiliary single-pole double-throw contacts. The auxiliary contacts are not used in this application. 3 Relay K16 Relay K16 is a single-pole single-throw relay located on the control panel of all commercial singlephase ECH16 units (15, 20 and 25 kw). K16 is equipped with a 24VAC coil which is energized when pilot relay K43 closes. When K16 is energized, the second stage heating elements are energized (HE2 in ECH16-15; HE3 and HE4 in ECH16-20 and ECH16-25). 4 Contactor K16 Contactor K16 is a three-pole double break contactor used in commercial 20 and 25 kw three-phase ECH16 units. K16 is equipped with a 24VAC coil which is energized when time delay DL2 closes. When K16 is energized, the second stage heating elements are energized. 5 Relay K17 Relay K17 is a single-pole single-throw relay located on the control panel of all commercial singlephase ECH16 units (15, 20 and 25 kw). K17 is equipped with a 24VAC coil which is energized when pilot relay K43 closes. When K17 is energized, the third stage heating elements are energized (HE3 in ECH16-15; HE5 and HE6 in ECH16-20 and ECH16-25). Page 18
TABLE 8 CHA16-261 & CHA16-311 ELECTRIC HEAT DATA Optional Single Point Power Source Boxes Single Package Unit Model No. Electric Heater Model No. & Net Weight No. of Steps & Phase Volts Input Heater Only *Minimum Circuit Ampacity Electric Heat Kw Input Electric Heat Btuh Input Heater Sub- Fuse Box Model No. Unit Sub- Fuse Box Model No. Total Unit & Electric Heat *Minimum Circuit Ampacity 208 22.5 3.7 12,600 25.1 ECH16R-5 1 step 220 23.9 4.2 14,300 ECH16R- ECH16-261 26.5 (4 lbs.) (1 phase) 230 24.9 4.6 15,700 26/41-5 27.5 240 26.0 5.0 17,100 28.6 208 31.6 5.3 18,100 34.3 ECH16R-7 1 step 220 33.5 5.9 20,100 ECH16R- ECH16-261 36.1 (5 lbs.) (1 phase) 230 35.0 6.4 21,800 26/65-7 37.6 CHA16H-261 240 36.5 7.0 23,900 39.1 208 45.1 7.5 25,600 47.8 ECH16R-10 1 step 220 47.8 8.4 28,700 ECH16R- ECH16-261 50.4 (5 lbs.) (1 phase) 230 50.0 9.2 31,400 26/65-10 52.6 240 52.1 10.0 34,100 54.8 208 67.8 11.3 38,600 70.4 ECH16-15 1 step 220 71.6 12.6 43,000 - - - - ECH16-261 74.3 (18 lbs.) (1 phase) 230 74.9 13.8 47,100 77.5 240 78.1 15.0 51,200 80.8 208 22.5 3.7 12,600 25.1 ECH16R-5 1 step 220 23.9 4.2 14,300 ECH16R- ECH16-311 26.5 (4 lbs.) (1 phase) 230 24.9 4.6 15,700 26/41-5 27.5 240 26.0 5.0 17,100 28.6 208 31.6 5.3 18,100 34.3 ECH16R-7 1 step 220 33.5 5.9 20,100 ECH16R- ECH16-311 36.1 (5 lbs.) (1 phase) 230 35.0 6.4 21,800 26/65-7 37.6 CHA16-311 240 36.5 7.0 23,900 39.1 208 45.1 7.5 25,600 47.8 ECH16RR-10 1 step 220 47.8 8.4 28,700 ECH16R- ECH16-311 50.4 (5 lbs.) (1 phase) 230 50.0 9.2 31,400 26/65-10 52.6 240 52.1 10.0 34,100 54.8 208 67.8 11.3 38,600 70.4 ECH16-15 1 step 220 71.6 12.6 43,000 - - - - ECH16-311 74.3 (18 lbs.) (1 phase) 230 74.9 13.8 47,100 77.5 240 78.1 15.0 51,200 80.8 *Refer to National Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167 F. Page 19
Single Package Unit Model No. Electric Heater Model No. & Net Weight No. of Steps & Phase TABLE 9 CHA16(R)-411-413 ELECTRIC HEAT DATA Volts Input Heater Only *Minimum Circuit Ampacity Electric Heat Kw Input Electric Heat Btuh Input Optional Single Point Power Source Boxes Heater Sub- Fuse Box Model No. Unit Sub- Fuse Box Model No. Total Unit & Electric Heat *Minimum Circuit Ampacity 208 22.5 3.7 12,600 26.3 ECH16R-5 1 step 220 23.9 4.2 14,300 ECH16R- ECH16-411 27.6 (4 lbs.) (1 phase) 230 24.9 4.6 15,700 26/41-5 28.6 240 26.0 5.0 17,100 29.8 208 31.6 5.3 18,100 35.4 ECH16R-7 1 step 220 33.5 5.9 20,100 ECH16R- ECH16-411 37.3 (5 lbs.) (1 phase) 230 35.0 6.4 21,800 26/65-7 38.8 240 36.5 7.0 23,900 40.3 208 45.1 7.5 25,600 48.9 ECH16R-10 1 step 220 47.8 8.4 28,700 ECH16R- ECH16-411 51.5 CHA16-411 (5 lbs.) (1 phase) 230 50.0 9.2 31,400 26/65-10 53.8 CHA16R-411 240 52.1 10.0 34,100 55.9 208 67.8 11.3 38,600 71.5 ECH16-15 1 step 220 71.6 12.6 43,000 - - - - ECH16-411 75.4 (18 lbs.) (1 phase) 230 74.9 13.8 47,100 78.6 240 78.1 15.0 51,200 81.9 208 90.3 15.0 51,200 94.0 ECH16-20 1 step 220 95.5 16.8 57,300 - - - - ECH16-411 99.3 (19 lbs.) (1 phase) 230 99.8 18.4 62,800 103.5 240 104.1 20.0 68,300 107.9 208 13.0 3.7 12,600 16.8 ECH16-5 1 step 220 13.8 4.2 14,300 - - - - ECH16-413 17.5 (17 lbs.) (3 phase) 230 14.4 4.6 15,700 18.1 240 15.0 5.0 17,100 18.8 208 18.3 5.3 18,100 22.0 220 19.3 5.9 20,100 - - - - ECH16-413 23.0 230 20.1 6.4 21,800 23.9 ECH16-7 1 step 240 21.0 7.0 23,900 24.8 (17 lbs.) (3 phase) 440 9.6 5.8 19,800 11.9 460 10.1 6.5 22,200 - - - - ECH16-413 12.4 480 10.5 7.0 23,900 12.8 208 26.1 7.5 25,600 29.9 220 27.6 8.4 28,700 - - - - ECH16-413 31.4 230 28.9 9.2 31,400 32.6 CHA16-413 ECH16-10 1 step 240 30.1 10.0 34,100 33.9 (17 lbs.) (3 phase) 440 13.8 8.4 28,700 16.0 460 14.4 9.2 31,400 - - - - ECH16-413 16.6 480 15.0 10.0 34,100 17.3 208 39.1 11.3 38,600 42.9 220 41.4 12.6 43,000 - - - - ECH16-413 45.1 230 43.2 13.8 47,100 47.0 ECH16-15 1 step 240 45.1 15.0 51,200 48.9 (20 lbs.) (3 phase) 440 20.6 12.6 43,000 22.9 460 21.6 13.8 47,100 - - - - ECH16-413 23.9 480 22.5 15.0 51,200 24.8 208 52.1 15.0 51,200 55.9 220 55.1 16.8 57,300 - - - - ECH16-413 58.9 230 57.6 18.4 62,800 61.4 ECH16-20 2 steps 240 60.1 20.0 68,300 63.9 (20 lbs.) (3 phase) 440 27.6 16.8 57,300 29.9 460 28.9 18.4 62,800 - - - - ECH16-413 31.1 480 30.1 20.0 68,300 32.4 *Refer to National Electrical Code manual to determine wire, fuse and disconnect size requirements. Use wires suitable for at least 167 F. Page 20