Carrier 48Tm016 028 Users Manual
48TM025 48TM-4SI
48TM016-028 to the manual 671ff065-a06f-4315-8ce6-0f2846b76f70
2015-01-24
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48TM016-028 Single-Package Rooftop Units Electric Cooling/Gas Heating Installation, Start-Up and Service Instructions CONTENTS Page SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . .1 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32 Step 1 — Provide Unit Support. . . . . . . . . . . . . . . . . . . . .2 • ROOF CURB • ALTERNATE UNIT SUPPORT Step 2 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . . .2 • POSITIONING • ROOF MOUNT Step 3 — Field Fabricate Ductwork . . . . . . . . . . . . . . .11 Step 4 — Make Unit Duct Connections . . . . . . . . . . .11 Step 5 — Install Flue Hood and Wind Baffle . . . . . .11 Step 6 — Trap Condensate Drain . . . . . . . . . . . . . . . . .11 Step 7 — Orifice Change . . . . . . . . . . . . . . . . . . . . . . . . . .12 Step 8 — Install Gas Piping . . . . . . . . . . . . . . . . . . . . . . .13 Step 9 — Make Electrical Connections . . . . . . . . . . .13 • FIELD POWER SUPPLY • FIELD CONTROL WIRING • OPTIONAL NON-FUSED DISCONNECT • OPTIONAL CONVENIENCE OUTLET Step 10 — Make Outdoor-Air Inlet Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 • MANUAL OUTDOOR-AIR DAMPER Step 11 — Install Outdoor-Air Hood . . . . . . . . . . . . . .16 Step 12 — Install All Accessories . . . . . . . . . . . . . . . 17 • MOTORMASTER® I CONTROL INSTALLATION • MOTORMASTER V CONTROL INSTALLATION Step 13 — Adjust Factory-Installed Options . . . . . 19 • PREMIERLINK™ CONTROL • ENTHALPY SWITCH/RECEIVER • OUTDOOR ENTHALPY CONTROL • DIFFERENTIAL ENTHALPY CONTROL • OPTIONAL ECONOMI$ERIV AND ECONOMI$ER2 • ECONOMI$ERIV STANDARD SENSORS • ECONOMI$ERIV CONTROL MODES Step 14 — Install Humidistat for Optional MoistureMi$er™ Package. . . . . . . . . . . . 31 START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-43 SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43-50 TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . 51-56 INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57 START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . CL-1 SAFETY CONSIDERATIONS Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment. Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. All other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply. Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have fire extinguishers available for all brazing operations. Before performing service or maintenance operations on unit, turn off main power switch to unit. Electrical shock could cause personal injury. 1. Improper installation, adjustment, alteration, service, or maintenance can cause property damage, personal injury, or loss of life. Refer to the User’s Information Manual provided with this unit for more details. 2. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. What to do if you smell gas: 1. DO NOT try to light any appliance. 2. DO NOT touch any electrical switch, or use any phone in your building. 3. IMMEDIATELY call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. 4. If you cannot reach your gas supplier, call the fire department. Disconnect gas piping from unit when pressure testing at pressure greater than 0.5 psig. Pressures greater than 0.5 psig will cause gas valve damage resulting in hazardous condition. If gas valve is subjected to pressure greater than 0.5 psig, it must be replaced before use. When pressure testing field-supplied gas piping at pressures of 0.5 psig or less, a unit connected to such piping must be isolated by closing the manual gas valve(s). IMPORTANT: Units have high ambient operating limits. If limits are exceeded, the units will automatically lock the compressor out of operation. Manual reset will be required to restart the compressor. Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480016-01 Printed in U.S.A. Form 48TM-4SI Pg 1 3-06 Replaces: 48TM-3SI Book 1 4 Tab 1a 6a INSTALLATION Level by using unit frame as a reference; leveling tolerance is ± 1/ in. per linear ft in any direction. See Fig. 3 for additional in16 formation. Unit operating weight is shown in Table 1. Four lifting holes are provided in ends of unit base rails as shown in Fig. 3. Refer to rigging instructions on unit. NOTE: On 48TM028 units, the lower forklift braces must be removed prior to setting unit on roof curb. POSITIONING — Maintain clearance, per Fig. 4-6, around and above unit to provide minimum distance from combustible materials, proper airflow, and service access. Do not install unit in an indoor location. Do not locate unit air inlets near exhaust vents or other sources of contaminated air. For proper unit operation, adequate combustion and ventilation air must be provided in accordance with Section 5.3 (Air for Combustion and Ventilation) of the National Fuel Gas Code, ANSI Z223.1 (American National Standards Institute). Although unit is weatherproof, guard against water from higher level runoff and overhangs. Locate mechanical draft system flue assembly at least 4 ft from any opening through which combustion products could enter the building, and at least 4 ft from any adjacent building. When unit is located adjacent to public walkways, flue assembly must be at least 7 ft above grade. Locate unit at least 10 ft away from adjacent units. ROOF MOUNT — Check building codes for weight distribution requirements. Unit operating weight is shown in Table 1. Instructions continued on page 11. Inspect unit for transportation damage. If damage is found, file any claim with the transportation agency. Step 1 — Provide Unit Support ROOF CURB — Assemble and install accessory roof curb or horizontal adapter roof curb in accordance with instructions shipped with this accessory. See Fig. 1-2B. Install insulation, cant strips, roofing, and counter flashing as shown. Ductwork can be installed to roof curb or horizontal adapter roof curb before unit is set in place. Curb or adapter roof curb should be level. This is necessary to permit unit drain to function properly. Unit leveling tolerance is ± 1/16 in. per linear ft in any direction. Refer to Accessory Roof Curb or Horizontal Adapter Roof Curb Installation Instructions for additional information as required. When accessory roof curb or horizontal adapter roof curb is used, unit may be installed on class A, B, or C roof covering material. IMPORTANT: The gasketing of the unit to the roof curb or adapter roof curb is critical for a watertight seal. Install gasket with the roof curb or adapter as shown in Fig. 2A and 2B. Improperly applied gasket can also result in air leaks and poor unit performance. ALTERNATE UNIT SUPPORT — When the curb or adapter cannot be used, install unit on a noncombustible surface. Support unit with sleepers, using unit curb support area. If sleepers cannot be used, support long sides of unit with a minimum of 3 equally spaced 4-in. x 4-in. pads on each side. Step 2 — Rig and Place Unit — Do not drop unit; keep upright. Use spreader bars over unit to prevent sling or cable damage. Rollers may be used to move unit across a roof. 3 1/2" 2" X 1/4 SUPPORT TYP. STITCH WELDED FULLY INSULATED SUPPLY PLENUM 1" INSULATION 1 1/2 # DENSITY, STICK PINNED & GLUED 14 3/4" 23" 6" NOTE: CRRFCURB013A00 is a fully factory preassembled horizontal adapter and includes an insulated transition duct. The pressure drop through the adapter curb is negligible. For horizontal return applications: The power exhaust and barometric relief dampers must be installed in the return air duct. 12" WIDE STANDING SEAM PANELS ACCESSORY PACKAGE NO. CRRFCURB013A00 CURB HEIGHT 1′-11″ (584) DESCRIPTION Pre-Assembled, Roof Curb, Horizontal Adapter Fig. 1 — Horizontal Supply/Return Adapter Installation (48TM016-025) 2 3 Fig. 2A — Roof Curb Details — 48TM016-025 4 Fig. 2B — Roof Curb Details — 48TM028 NOTES: 1. Dimensions in ( ) are in millimeters. 2. Refer to Fig. 4-6 for unit operating weights. 3. Remove boards at ends of unit and runners prior to rigging. 4. Rig by inserting hooks into unit base rails as shown. Use corner post from packaging to protect coil from damage. Use bumper boards for spreader bars on all units. 5. Weights do not include optional economizer. Add 90 lb (41 kg) for economizer weight. 6. Weights given are for aluminum evaporator and condenser coil plate fins. All panels must be in place when rigging. UNIT 48TM 016 020 025 028 DIMENSIONS MAXIMUM SHIPPING WEIGHT lb 1875 1925 2035 2445 A kg 850 873 923 1109 ft-in. 6-111/2 6-111/2 6-111/2 6-111/2 B mm 2121 2121 2121 2121 Fig. 3 — Rigging Details 5 ft-in. 4-0 3-2 3-4 3-4 mm 1219 964 1016 1016 6 Fig. 4 — Base Unit Dimensions — 48TM016,020 7 Fig. 5 — Base Unit Dimensions — 48TM025 8 Fig. 6 — Base Unit Dimensions — 48TM028 Table 1 — Physical Data UNIT 48TM NOMINAL CAPACITY (tons) OPERATING WEIGHT Economizer MoistureMi$er™ Dehumidification Package COMPRESSOR/MANUFACTURER 1...ZR94KC, 1...ZR72KC 60, 40 2 85, 60 Quantity...Model (Ckt 1, Ckt 2) Capacity Stages (%) Number of Refrigerant Circuits Oil (oz) (Ckt 1, Ckt 2) REFRIGERANT TYPE Expansion Device Operating Charge (lb-oz) Circuit 1† Circuit 2 CONDENSER COIL Rows...Fins/in. Total Face Area (sq ft) EVAPORATOR FAN Quantity...Size (in.) Type Drive Nominal Cfm Motor Hp Motor Nominal Rpm Maximum Continuous Bhp Motor Bearing Type Maximum Allowable Rpm Motor Pulley Pitch Diameter Min/Max (in.) Nominal Motor Shaft Diameter (in.) Fan Pulley Pitch Diameter (in.) Nominal Fan Shaft Diameter (in.) Belt, Quantity...Type...Length (in.) Pulley Center Line Distance (in.) Speed Change per Full Turn of Movable Pulley Flange (rpm) Movable Pulley Maximum Full Turns From Closed Position Factory Speed Factory Speed Setting (rpm) Fan Shaft Diameter at Pulley (in.) Bhp TXV 020D/F 18 1850 90 40 025D/F 20 1900 90 40 Scroll, Copeland 1...ZR108KC, 1...ZR125KC, 1...ZR94KC 1...ZR108KC 55, 45 55, 45 2 2 106, 81 106,106 R-22 TXV 028D/F 25 2270 90 40 1...ZRU140KC,* 1...ZR144KC 50, 50 2 136, 106 19-8 13-8 Rows...Fins/in. Total Face Area (sq ft) CONDENSER FAN Nominal Cfm Quantity...Diameter (in.) Motor Hp...Rpm Watts Input (Total) EVAPORATOR COIL Motor Frame Size Nominal Rpm High/Low Fan Rpm Range 016D/F 15 1800 90 40 Low-Medium Static High Static Low-Medium Static High Static Low-Medium Static High Static Low-Medium Static High Static Low-Medium Static High Static Low-Medium Static High Static 19-8 19-11 26-13 19-2 13-14 25-10 Cross-Hatched 3/8-in. Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins 4...15 4...15 4...15 3...15 (2 coils) 21.7 21.7 21.7 43.4 Propeller Type 10,500 10,500 14,200 21,000 3...22 3...22 2...30 6...22 1/ ...1050 1/ ...1050 1 1...1075 /2...1050 2 2 1100 1100 3400 2200 Cross-Hatched 3/8-in. Copper Tubes, Aluminum Lanced or Copper Plate Fins, Face Split 4...15 4...15 4...15 4...15 17.5 17.5 17.5 17.5 Centrifugal Type 2...12 x 12 2...12 x 12 2...12 x 12 2...12 x 12 Belt Belt Belt Belt 6000 7200 8000 10,000 5 5 7.5 10 1745 1745 1745 1740 8.7 [208/230, 575 v] 10.2 [208/230, 575 v] 6.13 5.90 9.5 [460 v] 11.8 [460 v] 184T 184T 213T 215T — — — — 873-1021 910-1095 1002-1151 1066-1283 1025-1200 1069-1287 1193-1369 1332-1550 Ball Ball Ball Ball 1550 1550 1550 1550 4.9/5.9 4.9/5.9 5.4/6.6 4.9/5.9 4.9/5.9 4.9/5.9 5.4/6.6 4.9/5.9 11/8 13 / 8 13/8 11/8 9.4 9.4 9.4 8.0 8.0 8.0 7.9 6.4 17/16 17/16 17/16 17/16 1...BX...50 1...BX...50 1...BX...53 2...BX...50 1...BX...48 1...BX...48 1...BX...50 2...BX...47 13.3-14.8 13.3-14.8 14.6-15.4 14.6-15.4 37 37 37 36 44 34 44 45 6** 3.5 965 1134 17/16 6†† 3.5 1002 1178 17/16 LEGEND — Brake Horsepower — Thermostatic Expansion Valve *The ZRU140KC compressor is a tandem compressor, consisting of a ZR72KC (25% total capacity) and a ZR68KC (24% total capacity). †Circuit 1 uses the lower portion of the condenser coil and lower portion of the evaporator coils; and Circuit 2 uses the upper portion of both coils. **Pulley has 6 turns. Due to belt and pulley size, movable pulley cannot be set to 0 to 11/2 turns open. ††Pulley has 6 turns. Due to belt and pulley size, movable pulley cannot be set to 0 to 1/2 turns open. ***Rollout switch is manual reset. †††A Liquid Propane kit is available as an accessory. ¶The 48TM028 unit requires 2-in. industrial-grade filters capable of handling face velocities up to 625 ft/min (such as American Air Filter no. 5700 or equivalent). NOTE: The 48TM016-028 units have a low-pressure switch (standard) located on the suction side. 9 6** 3.5 1120 1328 17/16 6†† 3.5 1182 1470 17/16 Table 1 — Physical Data (cont) UNIT 48TM 016D/F 020D/F 025D/F 028D/F FURNACE SECTION Rollout Switch Cutout Temp (F)*** 190 190 190 190 Burner Orifice Diameter (in. ...drill size) Natural Gas Std 0.1285...30/0.136...29 0.1285...30/0.136...29 0.1285...30/0.136...29 0.1285...30/0.136...29 Thermostat Heat Anticipator Setting (amps) 208/230, 575 v Stage 1 0.98 0.98 0.98 0.98 Stage 2 0.44 0.44 0.44 0.44 460 v Stage 1 0.80 0.80 0.80 0.80 Stage 2 0.44 0.44 0.44 0.44 Gas Input Stage 1 172,000/225,000 206,000/270,000 206,000/270,000 206,000/270,000 Stage 2 230,000/300,000 275,000/360,000 275,000/360,000 275,000/360,000 Efficiency (Steady-State) (%) 81 81 81 81 Temperature Rise Range 15-45/20-50 15-45/20-50 15-45/20-50 15-45/20-50 Manifold Pressure (in. wg) Natural Gas Std 3.3 3.3 3.3 3.3 Liquid Propane††† Alt 3.3 3.3 3.3 3.3 Gas Valve Quantity 1 1 1 1 Gas Valve Pressure Range in. wg 5.5-13.5 5.5-13.5 5.5-13.5 5.5-13.5 psig 0.235-0.487 0.235-0.487 0.235-0.487 0.235-0.487 3 3 3 3/4 /4 /4 /4 Field Gas Connection Size (in.-FPT) HIGH-PRESSURE SWITCH (psig) Cutout Reset (Auto) LOW-PRESSURE SWITCH (psig) Cutout Reset (Auto) FREEZE PROTECTION THERMOSTAT (F) Opens Closes OUTDOOR-AIR INLET SCREENS Quantity...Size (in.) RETURN-AIR FILTERS Quantity...Size (in.) POWER EXHAUST 426 320 27 44 30 ± 5 45 ± 5 Cleanable 2...20 x 25 x 1 1...20 x 20 x 1 Throwaway¶ 4...20 x 20 x 2 4...16 x20 x 2 1/ Hp, 208/230-460 v Motor Direct Drive, Propeller-Fan (Factory-Wired for 460 v) 2 LEGEND Bhp — Brake Horsepower TXV — Thermostatic Expansion Valve *The ZRU140KC compressor is a tandem compressor, consisting of a ZR72KC (25% total capacity) and a ZR68KC (24% total capacity). †Circuit 1 uses the lower portion of the condenser coil and lower portion of the evaporator coils; and Circuit 2 uses the upper portion of both coils. **Pulley has 6 turns. Due to belt and pulley size, movable pulley cannot be set to 0 to 11/2 turns open. ††Pulley has 6 turns. Due to belt and pulley size, movable pulley cannot be set to 0 to 1/2 turns open. ***Rollout switch is manual reset. †††A Liquid Propane kit is available as an accessory. ¶The 48TM028 unit requires 2-in. industrial-grade filters capable of handling face velocities up to 625 ft/min (such as American Air Filter no. 5700 or equivalent). NOTE: The 48TM016-028 units have a low-pressure switch (standard) located on the suction side. 10 Step 3 — Field Fabricate Ductwork — Secure all ducts to building structure. Use flexible duct connectors between unit and ducts as required. Insulate and weatherproof all external ductwork, joints, and roof openings with counter flashing and mastic in accordance with applicable codes. Ducts passing through an unconditioned space must be insulated and covered with a vapor barrier. Step 5 — Install Flue Hood and Wind Baffle — Flue hood and wind baffle are shipped secured under main control box. To install, secure flue hood to access panel. See Fig. 10. The wind baffle is then installed over the flue hood. NOTE: When properly installed, flue hood will line up with combustion fan housing. See Fig. 11. Step 6 — Trap Condensate Drain — See Fig. 12 for drain location. One 3/4-in. half coupling is provided inside unit evaporator section for condensate drain connection. An 81/2-in. x 3/4-in. diameter and 2-in. x 3/4-in. diameter pipe nipple, coupled to standard 3/4-in. diameter elbows, provide a straight path down through hole in unit base rails (see Fig. 13). A trap at least 4-in. deep must be used. Step 4 — Make Unit Duct Connections — Unit is shipped for thru-the-bottom duct connections. Ductwork openings are shown in Fig. 1 and 4-6. Duct connections are shown in Fig. 7. Field-fabricated concentric ductwork may be connected as shown in Fig. 8 and 9. Attach all ductwork to roof curb and roof curb basepans. NOTE: Dimensions A, A′, B, and B′ are obtained from field-supplied ceiling diffuser. Shaded area indicates block-off panels. NOTE: Do not drill in this area; damage to basepan may result in water leak. Fig. 9 — Concentric Duct Details Fig. 7 — Air Distribution — Thru-the-Bottom WIND BAFFLE NOTE: Do not drill in this area; damage to basepan may result in water leak. Fig. 10 — Flue Hood Location Fig. 8 — Concentric Duct Air Distribution 11 Step 7 — Orifice Change — This unit is factory as- INDUCED DRAFT MOTOR sembled for heating operation using natural gas at an elevation from sea level to 2000 ft. This unit uses orifice type LH32RFnnn, where “nnn” indicates the orifice size based on drill size diameter in thousands of an inch. HIGH ELEVATION (Above 2000 ft) — Use accessory high altitude kit when installing this unit at an elevation of 2000 to 7000 ft. For elevations above 7000 ft, refer to Table 2 to identify the correct orifice size for the elevation. See Table 3 for the number of orifices required for each unit size. Purchase these orifices from your local Carrier dealer. Follow instructions in accessory Installation Instructions to install the correct orifices. Table 2 — Altitude Compensation* ELEVATION (ft) COMBUSTION FAN HOUSING MAIN BURNER SECTION 0-1,999 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 HEAT EXCHANGER SECTION Fig. 11 — Combustion Fan Housing Location NATURAL GAS ORIFICE† Low Heat High Heat 30 29 30 29 31 30 31 30 31 30 31 30 32 31 32 31 33 31 35 32 *As the height above sea level increases, there is less oxygen per cubic foot of air. Therefore, heat input rate should be reduced at higher altitudes. Includes a 4% input reduction per each 1000 ft. †Orifices available through your Carrier dealer. Table 3 — Orifice Quantity UNIT 48TMD016 48TMD020, 48TMD024, 48TMD028, 48TMF016 48TMF020, 48TMF024, 48TMF028 3/4" FPT DRAIN CONNECTION ORIFICE QUANTITY 5 6 7 CONVERSION TO LP (Liquid Propane) GAS — Use accessory LP gas conversion kit when converting this unit for use with LP fuel usage for elevations up to 7000 ft. For elevations above 7000 ft, refer to Table 4 to identify the correct orifice size for the elevation. See Table 3 for the number of orifices required for each unit size. Purchase these orifices from your local Carrier dealer. Follow instructions in accessory Installation Instructions to install the correct orifices. 1-3/8" DRAIN HOLE Fig. 12 — Condensate Drain Details (48TM016 Shown) Table 4 — LP Gas Conversion* ELEVATION (ft) 0-1,999 2,000 3,000 4,000 5,000 6,000 7,000 8,000 9,000 10,000 LP GAS ORIFICE† 36 37 38 38 39 40 41 41 42 43 *As the height above sea level increases, there is less oxygen per cubic foot of air. Therefore, heat input rate should be reduced at higher altitudes. Includes a 4% input reduction per each 1000 ft. †Orifices available through your Carrier dealer. Fig. 13 — Condensate Drain Piping Details 12 Step 8 — Install Gas Piping — Unit is equipped for Field wiring must confirm to temperature limitations for type “T” wire. All field wiring must comply with NEC and local requirements. Transformer no. 1 is wired for 230-v unit. If 208/230-v unit is to be run with 208-v power supply, the transformer must be rewired as follows: 1. Remove cap from red (208 v) wire. 2. Remove cap from orange (230 v) spliced wire. 3. Replace orange wire with red wire. 4. Recap both wires. use with natural gas. Installation must conform with local building codes or, in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1. Install field-supplied manual gas shutoff valve with a 1/8-in. NPT pressure tap for test gage connection at unit. Field gas piping must include sediment trap and union. See Fig. 14. Do not pressure test gas supply while connected to unit. Always disconnect union before servicing. Exceeding maximum manifold pressure may cause explosion and injury. Be certain unused wires are capped. Failure to do so may damage the transformers. IMPORTANT: Natural gas pressure at unit gas connection must not be less than 5.5 in. wg or greater than 13.5 in. wg. Operating voltage to compressor must be within voltage range indicated on unit nameplate. On 3-phase units, voltages between phases must be balanced within 2%. Unit failure as a result of operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. FIELD CONTROL WIRING — Install a Carrier-approved accessory thermostat assembly according to installation instructions included with accessory. Locate thermostat assembly on a solid interior wall in the conditioned space to sense average temperature. Route thermostat cable or equivalent single leads of colored wire from subbase terminals through conduit in unit to low-voltage connections as shown on unit label wiring diagram and in Fig. 16. NOTE: For wire runs up to 50 ft, use no. 18 AWG (American Wire Gage) insulated wire (35 C minimum). For 50 to 75 ft, use no. 16 AWG insulated wire (35 C minimum). For over 75 ft, use no. 14 AWG insulated wire (35 C minimum). All wire larger than no. 18 AWG cannot be directly connected at the thermostat and will require a junction box and splice at the thermostat. Set heat anticipator settings as follows: Size gas-supply piping for 0.5-in. wg maximum pressure drop. Do not use supply pipe smaller than unit gas connection. Fig. 14 — Field Gas Piping Step 9 — Make Electrical Connections VOLTAGE 208/230,575 460 FIELD POWER SUPPLY — Unit is factory wired for voltage shown on nameplate. When installing units, provide a disconnect per NEC (National Electrical Code) of adequate size (Table 5). All field wiring must comply with NEC and local requirements. Route power ground lines through control box end panel or unit basepan (see Fig. 4-6) to connections as shown on unit wiring diagram and Fig. 15. W1 0.98 0.80 W2 0.44 0.44 Settings may be changed slightly to provide a greater degree of comfort for a particular installation. The correct power phasing is critical in the operation of the scroll compressors. An incorrect phasing will cause the compressor to rotate in the wrong direction. This may lead to premature compressor failure. The unit must be electrically grounded in accordance with local codes and NEC ANSI/NFPA 70 (National Fire Protection Association) to protect against fire and electrical shock. NOTE: The maximum wire size for TB1 is 2/0. LEGEND EQUIP — Equipment GND — Ground NEC — National Electrical Code TB — Terminal Block Fig. 15 — Field Power Wiring Connections 13 OPTIONAL NON-FUSED DISCONNECT — On units with the optional non-fused disconnect, incoming power will be wired into the disconnect switch. Refer to Fig. 17 for wiring for 100 and 200 amp disconnect switches. Units with an MOCP (maximum overcurrent protection) under 100 will use the 100 amp disconnect switch. Units with an MOCP over 100 will use the 200 amp disconnect switch. Refer to the applicable disconnect wiring diagram. To prevent breakage during shipping, the disconnect handle and shaft are shipped and packaged inside the unit control box. Install the disconnect handle before unit operation. To install the handle and shaft, perform the following procedure: 1. Open the control box door and remove the handle and shaft from shipping location. 2. Loosen the Allen bolt located on the disconnect switch. The bolt is located on the square hole and is used to hold the shaft in place. The shaft cannot be inserted until the Allen bolt is moved. 3. Insert the disconnect shaft into the square hole on the disconnect switch. The end of the shaft is specially cut and the shaft can only be inserted in the correct orientation. 4. Tighten the Allen bolt to lock the shaft into position. 5. Close the control box door. 6. Attach the handle to the external access door with the two screws provided. When the handle is in the ON position, the handle will be vertical. When the handle is in the OFF position, the handle will be horizontal. 7. Turn the handle to the OFF position and close the door. The handle should fit over the end of the shaft when the door is closed. 8. The handle must be in the OFF position to open the control box door. OPTIONAL CONVENIENCE OUTLET — On units with optional convenience outlet, a 115-v GFI (ground fault interrupt) convenience outlet receptacle is provided for field wiring. Field wiring should be run through the 7/8-in. knockout provided in the basepan near the return air opening. THERMOSTAT ASSEMBLY REMOVABLE JUMPER Y2 W1 W2 G C R Y1 Y2 W1 W2 G C X RED BLU PNK ORN VIO BLK BRN WHT L Y1 RH RC X Fig. 16 — Field Control Thermostat Wiring 6T3 4T2 2T1 LOAD 5L3 3L2 1L1 LINE NOTE: The disconnect takes the place of TB-1 as shown on the unit wiring diagram label and the component arrangement label. Fig. 17 — Optional Non-Fused Disconnect Wiring 14 Table 5 — Electrical Data UNIT 48TM Max COMPRESSOR OFM No. 1 No. 1A No. 2 RLA LRA RLA LRA RLA LRA Qty Hp FLA (ea) Hp 187 253 32.1 195 — — 20.7 156 3 0.5 1.7 5.0 15.8/15.8 460 414 508 16.4 95 — — 10 70 3 0.5 0.8 5.0 7.9 575 518 633 12 80 — — 8.2 54 3 0.5 0.75 5.0 6.0 208/230 187 253 30.1 225 — — 28.8 195 3 0.5 1.7 5.0 15.8/15.8 460 414 508 15.5 114 — — 14.7 95 3 0.5 0.8 5.0 7.9 575 518 80 — — 10.7 80 3 0.5 0.75 5.0 6.0 208/230 187 253 239 — — 33.6 225 2 1 6.6 7.5 25.0/25.0 460 414 508 19.2 125 — — 17.3 114 2 1 3.3 7.5 13.0 575 518 633 13.8 80.0 — — 13.5 80.0 2 1.0 3.4 7.5 10.0 208/230 187.2 253 20.7 156 20.7 156 47.1 245 6 0.5 1.7 10.0 28.0/28.0 460 414 508 Min 208/230 016 020 025 028 575 FLA HACR IFM LRA MCA MOCP NEC OFM RLA VOLTAGE RANGE NOMINAL VOLTAGE (3 Ph, 60 Hz) — — — — — — — — — 632.5 12.1 517.5 632.5 42 POWER EXHAUST IFM FLA 10 75 10 75 19.6 125 6 0.5 0.8 10.0 14.6 8.2 54 8.2 54 15.8 100 6 0.5 0.8 10.0 13.0 FLA — 4.6 — 2.3 — 2.1 — 4.6 — 2.3 — 2.1 — 4.6 — 2.3 — 2.1 — 4.6 — 2.3 — 2.1 COMBUSTION FAN MOTOR LRA — 18.8 — 6.0 — 4.8 — 18.8 — 6.0 — 4.8 — 18.8 — 6.0 — 4.8 — 18.8 — 6 — 4.8 FLA 0.57 0.57 0.30 0.30 0.57 0.57 0.57 0.57 0.30 0.30 0.57 0.57 0.57 0.57 0.30 0.30 0.57 0.57 0.57 0.57 0.30 0.30 0.57 0.57 POWER SUPPLY MCA 82/82 86/86 41 43 31 34 87/87 92/92 44 47 34 36 124/124 129/129 61 63 48 50 138/138 143/143 64 66 54 56 MOCP* 110/110 110/110 50 50 40 40 110/110 110/110 50 60 40 40 150/150 150/150 80 80 60 60 175/175 150/175 80 80 60 70 EXAMPLE: Supply voltage is 460-3-60. LEGEND Full Load Amps Heating, Air Conditioning and Refrigeration Indoor (Evaporator) Fan Motor Locked Rotor Amps Minimum Circuit Amps Maximum Overcurrent Protection National Electrical Code Outdoor (Condenser) Fan Motor Rated Load Amps AB = 452 v BC = 464 v AC = 455 v Average Voltage = 452 + 464 + 455 3 1371 3 = 457 Determine maximum deviation from average voltage. (AB) 457 – 452 = 5 v (BC) 464 – 457 = 7 v (AC) 457 – 455 = 2 v Maximum deviation is 7 v. Determine percent voltage imbalance. 7 % Voltage Imbalance = 100 x 457 = 1.53% This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%. = *Fuse or HACR circuit breaker. NOTES: 1. In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker. Canadian units may be fuse or circuit breaker. 2. Unbalanced 3-Phase Supply Voltage Never operate a motor where a phase imbalance in supply voltage is greater than 2%. Use the following formula to determine the percent voltage imbalance. % Voltage Imbalance max voltage deviation from average voltage = 100 x average voltage IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately. 15 Step 10 — Make Outdoor-Air Inlet Adjustments MANUAL OUTDOOR-AIR DAMPER — All units (except those equipped with a factory-installed economizer) have a manual outdoor-air damper to provide ventilation air. Damper can be preset to admit up to 25% outdoor air into return-air compartment. To adjust, loosen securing screws and move damper to desired setting, then retighten screws to secure damper (Fig. 18). Fig. 19 — Outdoor-Air Hood Component Location Fig. 18 — Standard 25% Outdoor-Air Section Details Step 11 — Install Outdoor-Air Hood IMPORTANT: If the unit is equipped with the optional EconoMi$erIV component, move the outdoor-air temperature sensor prior to installing the outdoor-air hood. See the Optional EconoMi$erIV and EconoMi$er2 section for more information. Fig. 20 — Seal Strip Location The outdoor-air hood is common to 25% air ventilation, EconoMi$erIV and EconoMi$er2. If EconoMi$erIV or EconoMi$er2 is used, all electrical connections have been made and adjusted at the factory. Assemble and install hood in the field. NOTE: The hood top panel, upper and lower filter retainers, hood drain pan, baffle (sizes 025 and 028), and filter support bracket are secured opposite the condenser end of the unit. The screens, hood side panels, remaining section of filter support bracket, seal strip, and hardware are in a package located inside the return-air filter access panel (Fig. 19). 1. Attach seal strip to upper filter retainer. See Fig. 20. 2. Assemble hood top panel, side panels, upper filter retainer, and drain pan (see Fig. 21). 3. Secure lower filter retainer and support bracket to unit. See Fig. 21. Leave screws loose on 025 and 028 units. 4. Slide baffle (sizes 025 and 028) behind lower filter retainer and tighten screws. 5. Loosen sheet metal screws for top panel of base unit located above outdoor-air inlet opening, and remove screws for hood side panels located on the sides of the outdoor-air inlet opening. 6. Match notches in hood top panel to unit top panel screws. Insert hood flange between top panel flange and unit. Tighten screws. 7. Hold hood side panel flanges flat against unit, and install screws removed in Step 5. 8. Insert outdoor-air inlet screens and spacer in channel created by lower filter retainer and filter support bracket. BAFFLE LOWER FILTER RETAINER FILTER SUPPORT BRACKET HOOD TOP PANEL HOOD SIDE PANELS (2) BAFFLE (025 AND 028 ONLY) LOWER FILTER RETAINER FILTER SUPPORT BRACKET HOOD DRAIN PAN UPPER FILTER RETAINER Fig. 21 — Outdoor-Air Hood Details 16 Step 12 — Install All Accessories — After all the Accessory 0° F Low Ambient Kit — Install the accessory 0° F low ambient kit per instruction supplied with accessory. Sensor Assembly — Install the sensor assembly in the location shown in Fig. 23. Motor Mount — To ensure proper fan height, replace the existing motor mount with the new motor mount provided with accessory. Transformer (460 and 575-v Units Only) — On 460 and 575-v units, a transformer is required. The transformer is provided with the accessory and must be field-installed. Motormaster I Control — Recommended mounting location is on the inside of the panel to the left of the control box. The control should be mounted on the inside of the panel, vertically, with leads protruding from bottom of extrusion. factory-installed options have been adjusted, install all fieldinstalled accessories. Refer to the accessory installation instructions included with each accessory. MOTORMASTER® I CONTROL INSTALLATION (48TM016,020, and 028) Install Field-Fabricated Wind Baffles — Wind baffles must be field-fabricated for all units to ensure proper cooling cycle operation at low ambient temperatures. See Fig. 22 for baffle details. Use 20-gage, galvanized sheet metal, or similar corrosion-resistant metal for baffles. Use field-supplied screws to attach baffles to unit. Screws should be 1/4-in. diameter and 5/ -in. long. Drill required screw holes for mounting baffles. 8 To avoid damage to the refrigerant coils and electrical components, use recommended screw sizes only. Use care when drilling holes. Install Motormaster I Controls — Only one Motormaster I control is required for 48TM016 and 020 units. The 48TM028 requires 2 Motormaster I controls — one for circuit 1 and one for circuit 2. The Motormaster I control must be used in conjunction with the accessory 0° F low ambient kit (purchased separately). The Motormaster I device controls outdoor fan no. 1 (and 4 on size 028 units) while outdoor fans no. 2 and 3 (and 5 and 6 on 028 units) are sequenced off by the Accessory 0° F Low Ambient Kit. SENSOR LOCATION SENSOR LOCATION SENSOR LOCATION HAIRPIN END HAIRPIN END 48TM016 48TM020 HAIRPIN END 48TM028 (Circuits 1 and 2) NOTE: All sensors are located on the eighth hairpin up from the bottom. Fig. 23 — Motormaster® I Sensor Locations NOTE: Dimensions in ( ) are in mm. Fig. 22 — Wind Baffle Details 17 MOTORMASTER® V CONTROL INSTALLATION (48TM025 Only) Install Field-Fabricated Wind Baffles — Wind baffles must be field-fabricated for all units to ensure proper cooling cycle operation at low ambient temperatures. See Fig. 22 for baffle details. Use 20-gage, galvanized sheet metal, or similar corrosion-resistant metal for baffles. Use field-supplied screws to attach baffles to unit. Screws should be 1/4-in. diameter and 5/ -in. long. Drill required screw holes for mounting baffles. 8 To avoid damage to the refrigerant coils and electrical components, use recommended screw sizes only. Use care when drilling holes. BLU YEL BLK FROM FUSE BLOCK B 13B 13C 12 13A 2 256 Install Motormaster V Controls — The Motormaster V (MMV) control is a motor speed control device which adjusts condenser fan motor speed in response to declining liquid refrigerant pressure. A properly applied Motormaster V control extends the operating range of air-conditioning systems and permits operation at lower outdoor ambient temperatures. The minimum ambient temperatures at which the unit will operate are: TO PRESSURE TRANSDUCER 1 2 3 TO MOTOR(S) Fig. 24 — Motormaster® V Control TEMPERATURE OPERATING LIMITS — F° (C°) Standard Unit with Unit with Unit Low Ambient Kit MMV Control 40 (4) 25 (–4) –20 (–29) Table 6 — Motormaster V Control Package Usage To operate down to the ambient temperatures listed, Motormaster V controls (Fig. 24) must be added. Fieldfabricated and installed wind baffles are also required for all units (see Fig. 22). The Motormaster V control permits operation of the unit to an ambient temperature of –20 F (–29 C). The control regulates the speed of 3-phase fan motors that are compatible with the control. These motors are factory installed. See Table 6 for the Motormaster V control accessory package usage. Table 7 shows applicable voltages and motors. Replacement of fan motor IS NOT REQUIRED ON CURRENT PRODUCTION UNITS since the control is compatible with the factory-installed fan motors. Only field wiring control is required. Install the Motormaster V control per instructions supplied with accessory. UNIT 48TM016-028 VOLTAGE ITEM DESCRIPTION 208/230 CRLOWAMB015A00 460 CRLOWAMB016A00 575 CRLOWAMB017A00 Table 7 — Applicable Voltages and Motors VOLTAGE 208/230-3-60 460-3-60 575-3-60 18 COMPATIBLE MOTOR HD52AK654 HD52AK654 HD52GE576 Step 13 — Adjust Factory-Installed Options into the fan section, down along the back side of the fan, and along the fan deck over to the supply-air opening. The SAT probe is wire-tied to the supply-air opening (on the horizontal opening end) in its shipping position. Remove the sensor for installation. Re-position the sensor in the flange of the supply-air opening or in the supply air duct (as required by local codes). Drill or punch a 1/2-in. hole in the flange or duct. Use two field-supplied, self-drilling screws to secure the sensor probe in a horizontal orientation. NOTE: The sensor must be mounted in the discharge airstream downstream of the cooling coil and any heating devices. Be sure the probe tip does not come in contact with any of the unit or heat surfaces. Outdoor Air Temperature (OAT) Sensor — When the unit is supplied with a factory-mounted PremierLink control, the outdoor-air temperature sensor (OAT) is factory-supplied and wired. Install the Indoor Air Quality (CO2) Sensor — Mount the optional indoor air quality (CO2) sensor according to manufacturer specifications. A separate field-supplied transformer must be used to power the CO2 sensor. Wire the CO2 sensor to the COM and IAQI terminals of J5 on the PremierLink controller. Refer to the PremierLink Installation, Start-up, and Configuration Instructions for detailed wiring and configuration information. PREMIERLINK™ CONTROL — The PremierLink controller is available as a special order from the factory and is compatible with the Carrier Comfort Network® (CCN) system. This control is designed to allow users the access and ability to change factory-defined settings, thus expanding the function of the standard unit control board. Carrier’s diagnostic standard tier display tools such as Navigator™ device or Scrolling Marquee can be used with the PremierLink controller. The PremierLink controller (see Fig. 25) requires the use of a Carrier electronic thermostat or a CCN connection for time broadcast to initiate its internal timeclock. This is necessary for broadcast of time of day functions (occupied/unoccupied). No sensors are supplied with the field-mounted PremierLink control. The factory-installed PremierLink control includes only the supply-air temperature (SAT) sensor and the outdoor air temperature (OAT) sensor as standard. An indoor air quality (CO2) sensor can be added as an option. Refer to Table 8 for sensor usage. Refer to Fig. 26 for PremierLink controller wiring. The PremierLink control may be mounted in the control panel or an area below the control panel. NOTE: PremierLink controller version 1.3 and later is shipped in Sensor mode. If used with a thermostat, the PremierLink controller must be configured to Thermostat mode. Install the Supply Air Temperature (SAT) Sensor — When the unit is supplied with a factory-mounted PremierLink control, the supply-air temperature (SAT) sensor (33ZCSENSAT) is factory-supplied and wired. The wiring is routed from the PremierLink control over the control box, through a grommet, Fig. 25 — PremierLink Controller 19 20 Y2 W1 W2 G C X Y2 W1 W2 G C X SFS NOT USED RMTOCC C X FSD 12 1 WHT 12 RED RED 2 2 PL1 PL1-2 RED BRN 1 3 2 4-20ma ECONO MOTOR W1 ENTH W2 SWITCH POSITION 0 POSITION 1 - CCN/LEN + 1 0 1234 RED NOT USED PL1-12 FROM 24V UNIT TRANSFORMER ECONO WHT OR BLK FROM IGC-G BLU FROM PL1-8 8 PL1 G YEL RED NOT J7 USED IGC GRN BRN VIO GND +4-20 ECONO J9 J8 PNK FROM PL1-9 PL1 9 BLU RED W WHT ORN FROM IGC-W RED W2 VIO FROM MGV-W2 MGV ORN IGC R RED RED FROM IGC-R RED HS3/ EXH/ PWR RVS PNK ORN RED HS2 RED PNK WHT RED BLU IGC RELAYS YEL HS1 RELAYS CMP1 CMP2 GRN FAN LOAD FACTORY DEFAULTS ON POWERUP CCN CUT FOR DUAL TRANSFORMER EQUIPMENT 4 NO ACTION 1 LEN PremierLink Control LEGEND CLO — Compressor Lockout CMP — Compressor ECONO — Economizer ENTH — Enthalpy Sensor IGC — Integrated Gas Unit Controller MGV — Main Gas Valve OAT — Outdoor Air Temperature Sensor PL — Plug SAT — Supply Air Temperature Sensor SPT — Space Temperature Sensor TB — Terminal Block *If PremierLink control is in thermostat mode. †TB2 terminal designations for 24 vac discrete inputs. Default is for DDC control. SERVICE/ NAVIGATOR PORT J3 CUT TO ISOLATE POWER SUPPLY TO CONTROLLER VIO RED J2 RED WHT BLK BRN ECONOMIZER 50TJ401148 (CRECOMZR010B00) TB2-C BRN ENTH BRN GRAY ECONO PLUG 1 BLK FIELD THERMOSTAT* PL1-1 RED ORN NOT USED PWR J1 Fig. 26 — Typical PremierLink™ Controls Wiring X C G W2 W1 Y2 Y1 R BRN 26 25 RED PNK SFS FSD CMPSAFE RMTOCC DDC CONTROL RED RED ORN Y2 Y1 BLK TB2†† Y1 Y1 BRN C ORN 24 23 RED WHT 21 22 RED BLU RED YEL RED 20 19 18 17 16 GRN OAQ COM IAQI COM WHT RED PNK RED BLU RED G TSTAT CONTROL GRN RED YEL WHT CMP SAFE TB2 X C G W2 TRAN1 RED RED RED RED RED 15 BLU BRN RED BRN OAT COM DISCRETE TSTAT CONTROL WHT Y2 PNK WHT BLU YEL GRN 14 13 12 11 10 9 VIO BRN SAT COM J4 W1 RED BRN BLU RED BRN 8 7 ORN BRN 0-20mA IN Y1 R VIO BRN 6 5 STO J5 RED R DDC CONTROL PNK VIO BRN BRN SPT COM DISCRETE CLO1 X BLU PL1 - 5 PL1 - 6 ORN BLK BRN BLU ANALO G OAT SAT GRN WHT 4 3 J6 BLK 2 BRN 1 BLUE J4 Table 8 — PremierLink™ Sensor Usage APPLICATION Differential Dry Bulb Temperature with PremierLink* (PremierLink requires 4-20 mA Actuator) Single Enthalpy with PremierLink* (PremierLink requires 4-20 mA Actuator) Differential Enthalpy with PremierLink* (PremierLink requires 4-20 mA Actuator) OUTDOOR AIR TEMPERATURE SENSOR RETURN AIR TEMPERATURE SENSOR OUTDOOR AIR ENTHALPY SENSOR RETURN AIR ENTHALPY SENSOR Included — HH79NZ039 Required — 33ZCT55SPT or Equivalent — — Included — Not Used — Included — Not Used — Required — 33CSENTHSW (HH57ZC003) or HH57AC077 Required — 33CSENTHSW (HH57ZC003) or HH57AC077 — Required — 33CSENTSEN or HH57AC078 *PremierLink control requires supply air temperature sensor 33ZCSENSAT and outdoor air temperature sensor HH79NZ039 — Included with factory-installed PremierLink control; field-supplied and field-installed with field-installed PremierLink control. NOTES: 1. CO2 Sensors (Optional): 33ZCSENCO2 — Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor. 33ZCASPCO2 — Aspirator box used for duct-mounted CO2 room sensor. 33ZCT55CO2 — Space temperature and CO2 room sensor with override. 33ZCT56CO2 — Space temperature and CO2 room sensor with override and setpoint. 2. All units include the following standard sensors: Outdoor-air sensor — 50HJ540569 — Opens at 67 F, closes at 52 F, not adjustable. Mixed-air sensor — HH97AZ001 — (PremierLink control requires supply air temperature sensor 33ZCSENSAT and outdoor air temperature sensor HH79NZ039) Compressor lockout sensor — 50HJ540570 — Opens at 35 F, closes at 50 F. intake). The enthalpy switch/receiver is not a NEMA 4 (National Electrical Manufacturers Association) enclosure and should be mounted in a location that is not exposed to outdoor elements such as rain or snow. Use two field-supplied no. 8 x 3/ -in. TEK screws. Insert the screws through the holes in the 4 sides of the enthalpy switch/receiver. Wiring — Carrier recommends the use of 18 to 22 AWG (American Wire Gage) twisted pair or shielded cable for all wiring. All connections must be made with 1/4-in. female spade connectors. A 24-vac transformer is required to power the enthalpy switch/receiver; as shown in Fig. 29, the PremierLink™ board provides 24 vac. Connect the GND and 24 VAC terminals on the enthalpy switch/receiver to the terminals on the transformer. On some applications, the power from the economizer harness can be used to power the enthalpy switch/receiver. To power the enthalpy switch/receiver from the economizer harness, connect power of the enthalpy switch/receiver to the red and brown wires (1 and 4) on the economizer harness. For connection to rooftop units with PremierLink™ control, connect the LOW Enthalpy terminal on the enthalpy switch/ receiver to J4 — pin 2 of the PremierLink control on the HVAC unit. The switch can be powered through the PremierLink control board if desired. Wire the 24 VAC terminal on the enthalpy switch/receiver to J4 — pin 1 on the PremierLink control. Wire the GND terminal on the enthalpy switch/ receiver to J1 — pin 2 on the PremierLink control. The HI Enthalpy terminal is not used. See Fig. 29. ENTHALPY SWITCH/RECEIVER — The accessory enthalpy switch/receiver (33CSENTHSW) senses temperature and humidity of the air surrounding the device and calculates the enthalpy when used without an enthalpy sensor. The relay is energized when enthalpy is high and deenergized when enthalpy is low (based on ASHRAE [American Society of Heating, Refrigeration and Air Conditioning Engineers] 90.1 criteria). If an accessory enthalpy sensor (33CSENTSEN) is attached to the return air sensor input, then differential enthalpy is calculated. The relay is energized when the enthalpy detected by the return air enthalpy sensor is less than the enthalpy at the enthalpy switch/receiver. The relay is deenergized when the enthalpy detected by the return air enthalpy sensor is greater than the enthalpy at the enthalpy switch/receiver (differential enthalpy control). See Fig. 27 and 28. OUTDOOR ENTHALPY CONTROL (Fig. 29) — Outdoor enthalpy control requires only an enthalpy switch/ receiver (33CSENTHSW). The enthalpy switch/receiver is mounted in the outdoor air inlet and calculates outdoor air enthalpy. The enthalpy switch/receiver energizes the relay output when the outdoor enthalpy is above 28 BTU/lb OR dry bulb temperature is above 75 F and is deenergized when the outdoor enthalpy is below 27 BTU/lb AND dry bulb temperature is below 74.5 F. The relay output is wired to the unit economizer which will open or close depending on the output of the switch. NOTE: The enthalpy calculation is done using an average altitude of 1000 ft above sea level. Mounting — Mount the enthalpy switch/receiver in a location where the outdoor air can be sampled (such as the outdoor air 21 Fig. 27 — Enthalpy Switch/Receiver Dimensions (33CSENTHSW) Fig. 28 — Enthalpy Sensor Dimensions (33CSENTSEN) *Used with Differential Enthalpy Control only. Fig. 29 — Typical Wiring Schematic — Carrier Rooftop Unit with PremierLink™ Controls 22 the transformer. On some applications, the power from the economizer harness can be used to power the enthalpy switch/ receiver. To power the enthalpy switch/receiver from the economizer harness, connect power of the enthalpy switch/receiver to the red and brown wires (1 and 4) on the economizer harness. Connect the LOW Enthalpy terminal on the enthalpy switch/receiver to J4 — pin 2 of the PremierLink control on the HVAC unit. The switch can be powered through the PremierLink control board if desired. Wire the 24VAC terminal on the enthalpy switch/receiver to J4 — pin 1 on the PremierLink control. Wire the GND terminal on the enthalpy switch/ receiver to J1 — pin 2 on the PremierLink control. The HI Enthalpy terminal is not used. See Fig. 29. Connect the 4-20 mA IN terminal on the enthalpy switch/ receiver to the 4-20 mA OUT terminal on the return air enthalpy sensor. Connect the 24-36 VDC OUT terminal on the enthalpy switch/receiver to the 24-36 VDC IN terminal on the return air enthalpy sensor. See Fig. 30. Enthalpy Switch/Receiver Jumper Settings — There are two jumpers. One jumper determines the mode of the enthalpy switch/receiver. The other jumper is not used. To access the jumpers, remove the 4 screws holding the cover on the enthalpy switch/receiver and then remove the cover. The factory settings for the jumpers are M1 and OFF. The mode jumper should be set to M2 for differential enthalpy control. The factory test jumper should remain on OFF or the enthalpy switch/receiver will not calculate enthalpy. Enthalpy Sensor Jumper Settings — There are two jumpers. One jumper determines the mode of the enthalpy sensor. The other jumper is not used. To access the jumpers, remove the 4 screws holding the cover on the enthalpy sensor and then remove the cover. The factory settings for the jumpers are M3 and OFF. DIFFERENTIAL ENTHALPY CONTROL (Fig. 30) — Differential enthalpy control requires both an enthalpy switch/ receiver (33CSENTHSW) and an enthalpy sensor (33CSENTSEN). The enthalpy switch/receiver is mounted in the outdoor air inlet and calculates outdoor air enthalpy. The enthalpy sensor is mounted in the return airstream and calculates the enthalpy of the indoor air. The enthalpy switch/receiver energizes the HI Enthalpy relay output when the outdoor enthalpy is greater than the indoor enthalpy. The LOW Enthalpy terminal is energized when the outdoor enthalpy is lower than the indoor enthalpy. The relay output is wired to the unit economizer which will open or close depending on the output of the switch. NOTE: The enthalpy calculation is done using an average altitude of 1000 ft above sea level. Mounting — Mount the enthalpy switch/receiver in a location where the outdoor air can be sampled (such as the outdoor air intake). The enthalpy switch/receiver is not a NEMA 4 enclosure and should be mounted in a location that is not exposed to outdoor elements such as rain, snow, or direct sunlight. Use two field-supplied no. 8 x 3/4-in. TEK screws. Insert the screws through the holes in the sides of the enthalpy switch/receiver. Mount the enthalpy sensor in a location where the indoor air can be sampled (such as the return air duct). The enthalpy sensor is not a NEMA 4 enclosure and should be mounted in a location that is not exposed to outdoor elements such as rain or snow. Use two field-supplied no. 8 x 3/4-in. TEK screws. Insert the screws through the holes in the sides of the enthalpy sensor. Wiring — Carrier recommends the use of 18 to 22 AWG twisted pair or shielded cable for all wiring. All connections must be made with 1/4-in. female spade connectors. The PremierLink™ board provides 24-vac to power the enthalpy switch/receiver. Connect the GND and 24 VAC terminals on the enthalpy switch/receiver to the terminals on 120 VAC LINE VOLTAGE 24 VAC SECONDARY 24 VAC OUTPUT FROM N/C CONTACT WHEN THE OUTDOOR ENTHALPY IS LESS THAN THE ORN INDOOR ENTHALPY (ENABLE ECONOMIZER) 24 VAC OUTPUT FROM N/O CONTACT WHEN THE INDOOR ENTHALPY IS GREATER THAN THE OUTDOOR ENTHALPY 24-36 4-20 VDC mA IN OUT 4-20 24-36 mA VDC IN OUT HI LOW GND 24 ENTHALPY VAC 33CSENTHSW 33CSENTSEN JUMPER SETTINGS FOR 33CSENTHSW JUMPER SETTINGS FOR 33CSENTSEN 0% 50% OFF 100% M1 23 M2 Fig. 30 — Differential Enthalpy Control Wiring M3 0% 50% OFF 100% M1 M2 M3 LEGEND N/C — Normally Closed N/O — Normally Open The mode jumper should be set to M3 for 4 to 20 mA output. The factory test jumper should remain on OFF or the enthalpy sensor will not calculate enthalpy. ENTHALPY SENSORS AND CONTROL — The enthalpy control (HH57AC077) is supplied as a field-installed accessory to be used with the EconoMi$er2 damper control option. The outdoor air enthalpy sensor is part of the enthalpy control. The separate field-installed accessory return air enthalpy sensor (HH57AC078) is required for differential enthalpy control. NOTE: The enthalpy control must be set to the “D” setting for differential enthalpy control to work properly. The enthalpy control receives the indoor and return enthalpy from the outdoor and return air enthalpy sensors and provides a dry contact switch input to the PremierLink™ controller. Locate the controller in place of an existing economizer controller or near the actuator. The mounting plate may not be needed if existing bracket is used. A closed contact indicates that outside air is preferred to the return air. An open contact indicates that the economizer should remain at minimum position. Outdoor Air Enthalpy Sensor/Enthalpy Controller (HH57AC077) — To wire the outdoor air enthalpy sensor, perform the following (see Fig. 31 and 32): NOTE: The outdoor air sensor can be removed from the back of the enthalpy controller and mounted remotely. 1. Use a 4-conductor, 18 or 20 AWG cable to connect the enthalpy control to the PremierLink controller and power transformer. 2. Connect the following 4 wires from the wire harness located in rooftop unit to the enthalpy controller: a. Connect the BRN wire to the 24 vac terminal (TR1) on enthalpy control and to pin 1 on 12-pin harness. b. Connect the RED wire to the 24 vac GND terminal (TR) on enthalpy sensor and to pin 4 on 12-pin harness. c. Connect the GRAY/ORN wire to J4-2 on PremierLink controller and to terminal (3) on enthalpy sensor. d. Connect the GRAY/RED wire to J4-1 on PremierLink controller and to terminal (2) on enthalpy sensor. NOTE: If installing in a Carrier rooftop, use the two gray wires provided from the control section to the economizer to connect PremierLink controller to terminals 2 and 3 on enthalpy sensor. Return Air Enthalpy Sensor — Mount the return-air enthalpy sensor (HH57AC078) in the return-air duct. The return air sensor is wired to the enthalpy controller (HH57AC077). The outdoor enthalpy changeover set point is set at the controller. To wire the return air enthalpy sensor, perform the following (see Fig. 31): 1. Use a 2-conductor, 18 or 20 AWG, twisted pair cable to connect the return air enthalpy sensor to the enthalpy controller. 2. At the enthalpy control remove the factory-installed resistor from the (SR) and (+) terminals. 3. Connect the field-supplied RED wire to (+) spade connector on the return air enthalpy sensor and the (SR+) terminal on the enthalpy controller. Connect the BLK wire to (S) spade connector on the return air enthalpy sensor and the (SR) terminal on the enthalpy controller. OPTIONAL ECONOMI$ERIV AND ECONOMI$ER2 — See Fig. 33 and 34 for EconoMi$erIV component locations. See Fig. 35 for EconoMi$er2 component locations. NOTE: These instructions are for installing the optional EconoMi$erIV and EconoMi$er2 only. Refer to the accessory EconoMi$erIV or EconoMi$er2 installation instructions when field installing an EconoMi$erIV or EconoMi$er2 accessory. ENTHALPY CONTROLLER A B TR C D SO TR1 SR + + S (OUTDOOR AIR + ENTHALPY SENSOR) RED BRN BLK RED S (RETURN AIR + ENTHALPY SENSOR) 3 2 LED 1 GRAY/ORN GRAY/RED WIRE HARNESS IN UNIT NOTES: 1. Remove factory-installed jumper across SR and + before connecting wires from return air sensor. 2. Switches shown in high outdoor air enthalpy state. Terminals 2 and 3 close on low outdoor air enthalpy relative to indoor air enthalpy. 3. Remove sensor mounted on back of control and locate in outside airstream. Fig. 31 — Outdoor and Return Air Sensor Wiring Connections for Differential Enthalpy Control BRACKET HH57AC077 ENTHALPY CONTROL AND OUTDOOR AIR ENTHALPY SENSOR HH57AC078 ENTHALPY SENSOR (USED WITH ENTHALPY CONTROL FOR DIFFERENTIAL ENTHALPY OPERATION) C7400 A1004 + MOUNTING PLATE Fig. 32 — Differential Enthalpy Control, Sensor and Mounting Plate (33AMKITENT006) To complete installation of the optional EconoMi$erIV, perform the following procedure. 1. Remove the EconoMi$erIV hood. Refer to Step 11 — Install Outdoor-Air Hood on page 16 for information on removing and installing the outdoor-air hood. 2. Relocate outdoor air temperature sensor from shipping position to operation position on EconoMi$erIV. See Fig. 33. IMPORTANT: Failure to relocate the sensor will result in the EconoMi$erIV not operating properly. 3. Reinstall economizer hood. 4. Install all EconoMi$erIV accessories. EconoMi$erIV wiring is shown in Fig. 36. EconoMi$er2 wiring is shown in Fig. 37. 24 Outdoor air leakage is shown in Table 9. Return air pressure drop is shown in Table 10. FRAME TOP ECONOMI$ER2 SCREWS Table 9 — Outdoor Air Damper Leakage LEAKAGE (cfm) DAMPER STATIC PRESSURE (in. wg) 0.2 0.4 0.6 0.8 1.0 1.2 35 53 65 75 90 102 SCREWS Table 10 — Return Air Pressure Drop (in. wg) CFM 4500 5000 5400 6000 7200 7500 9000 10,000 11,250 0.040 0.050 0.060 0.070 0.090 0.100 0.110 0.120 0.140 SCREWS ECONOMI$ERIV Fig. 35 — EconoMi$er2 Component Locations ECONOMI$ERIV STANDARD SENSORS Outdoor Air Temperature (OAT) Sensor — The outdoor air temperature sensor (HH57AC074) is a 10 to 20 mA device used to measure the outdoor-air temperature. The outdoor air temperature is used to determine when the EconoMi$erIV can be used for free cooling. The sensor must be field-relocated. See Fig. 33. The operating range of temperature measurement is 40 to 100 F. Supply Air Temperature (SAT) Sensor — The supply air temperature sensor is a 3 K thermistor located at the inlet of the indoor fan. See Fig. 34. This sensor is factory installed. The operating range of temperature measurement is 0° to 158 F. See Table 11 for sensor temperature/resistance values. The temperature sensor looks like an eyelet terminal with wires running to it. The sensor is located in the “crimp end” and is sealed from moisture. Low Temperature Compressor Lockout Switch — The EconoMi$erIV is equipped with an ambient temperature lockout switch located in the outdoor airstream which is used to lockout the compressors below a 42 F ambient temperature. See Fig. 33. OUTDOOR AIR TEMPERATURE SENSOR FRAME (INSTALLED OPERATION TOP SCREWS POSITION) LOW TEMPERATURE COMPRESSOR LOCKOUT SWITCH Fig. 33 — EconoMi$erIV Component Locations — End View SUPPLY AIR TEMPERATURE SENSOR LOCATION Table 11 — Supply Air Sensor Temperature/ Resistance Values TEMPERATURE (F) –58 –40 –22 –4 14 32 50 68 77 86 104 122 140 158 176 185 194 212 230 248 257 266 284 302 ECONOMI$ERIV ACTUATOR TR1 TR 24 24 Vac HOT EXH Set Vac COM _ + 2 10V N1 CONTROLLER 2V 1 N 4 n P T1 5 Min Pos EXH P1 Ope 3 DCV Max T EF1 10V EF 2V DCV Set DCV 10V AQ1 AQ 2V SO+ C Free l Coo B SO SR+ SR D A FLANGE AND SCREWS (HIDDEN) Fig. 34 — EconoMi$erIV Component Locations — Side View 25 RESISTANCE (ohms) 200,250 100,680 53,010 29,091 16,590 9,795 5,970 3,747 3,000 2,416 1,597 1,080 746 525 376 321 274 203 153 116 102 89 70 55 LEGEND DCV — Demand Controlled Ventilation IAQ — Indoor Air Quality LALS — Low Temperature Compressor Lockout Switch OAT — Outdoor-Air Temperature POT — Potentiometer Potentiometer Default Settings: Power Exhaust Middle Minimum Pos. Fully Closed DCV Max. Middle DCV Set Middle Enthalpy C Setting NOTES: 1. 620 ohm, 1 watt 5% resistor should be removed only when using differential enthalpy or dry bulb. 2. If a separate field-supplied 24 v transformer is used for the IAQ sensor power supply, it cannot have the secondary of the transformer grounded. 3. For field-installed remote minimum position POT, remove black wire jumper between P and P1 and set control minimum position POT to the minimum position. Fig. 36 — EconoMi$erIV Wiring 4 3 7 RED 500 OHM RESISTOR 2 8 PINK 6 NOTE 1 BLUE RUN 5 OAT BLACK NOTE 2 1 10 50HJ540573 ACTUATOR ASSEMBLY 11 9 WHITE DIRECT DRIVE ACTUATOR 12 ECONOMISER2 PLUG LEGEND OAT — Outdoor Air Temperature Sensor NOTES: 1. Switch on actuator must be in run position for economizer to operate. 2. 50HJ540573 actuator consists of the 50HJ540567 actuator and a harness with 500-ohm resistor. Fig. 37 — EconoMi$er2 Wiring 26 ECONOMI$ERIV CONTROL MODES IMPORTANT: The optional EconoMi$er2 does not include a controller. The EconoMi$er2 is operated by a 4 to 20 mA signal from an existing field-supplied controller (such as PremierLink™ control). See Fig. 37 for wiring information. Determine the EconoMi$erIV control mode before set up of the control. Some modes of operation may require different sensors. Refer to Table 12. The EconoMi$erIV is supplied from the factory with a supply air temperature sensor, a low temperature compressor lockout switch, and an outdoor air temperature sensor. This allows for operation of the EconoMi$erIV with outdoor air dry bulb changeover control. Additional accessories can be added to allow for different types of changeover control and operation of the EconoMi$erIV and unit. Table 12 — EconoMi$erIV Sensor Usage Differential Enthalpy CO2 for DCV Control using a Wall-Mounted CO2 Sensor CO2 for DCV Control using a Duct-Mounted CO2 Sensor Fig. 38 — EconoMi$erIV Controller Potentiometer and LED Locations CRTEMPSN002A00* 19 HH57AC078 HH57AC078 and CRENTDIF004A00* LED ON 18 D 17 LED OFF 16 LED ON C 15 mA Outdoor Air Dry Bulb Differential Dry Bulb Single Enthalpy ECONOMI$ERIV WITH OUTDOOR AIR DRY BULB SENSOR Accessories Required None. The outdoor air dry bulb sensor is factory installed. 33ZCSENCO2 14 LED ON LED OFF B 13 33ZCSENCO2† and 33ZCASPCO2** 12 OR APPLICATION CRCBDIOX005A00†† LED OFF LED ON A 11 10 LED OFF 9 *CRENTDIF004A00 and CRTEMPSN002A00 accessories are used on many different base units. As such, these kits may contain parts that will not be needed for installation. †33ZCSENCO2 is an accessory CO2 sensor. **33ZCASPCO2 is an accessory aspirator box required for ductmounted applications. ††CRCBDIOX005A00 is an accessory that contains both 33ZCSENCO2 and 33ZCASPCO2 accessories. 40 45 50 55 60 65 70 75 80 DEGREES FAHRENHEIT 85 90 95 Fig. 39 — Outside Air Temperature Changeover Set Points Outdoor Dry Bulb Changeover — The standard controller is shipped from the factory configured for outdoor dry bulb changeover control. The outdoor air and supply air temperature sensors are included as standard. For this control mode, the outdoor temperature is compared to an adjustable set point selected on the control. If the outdoor-air temperature is above the set point, the EconoMi$erIV will adjust the outdoor-air dampers to minimum position. If the outdoor-air temperature is below the set point, the position of the outdoor-air dampers will be controlled to provide free cooling using outdoor air. When in this mode, the LED next to the free cooling set point potentiometer will be on. The changeover temperature set point is controlled by the free cooling set point potentiometer located on the control. See Fig. 38. The scale on the potentiometer is A, B, C, and D. See Fig. 39 for the corresponding temperature changeover values. Differential Dry Bulb Control — For differential dry bulb control the standard outdoor dry bulb sensor is used in conjunction with an additional accessory return air sensor (part number CRTEMPSN002A00). The accessory sensor must be mounted in the return airstream. See Fig. 40. In this mode of operation, the outdoor-air temperature is compared to the return-air temperature and the lower temperature airstream is used for cooling. When using this mode of changeover control, turn the free cooling/enthalpy set point potentiometer fully clockwise to the D setting. See Fig. 38. 1 TR TR c Va 24 M CO EX 24 c Va T HO H Se t _ + 10V N1 2 2V N EX P1 1 H P T1 Op 4 en DC V Ma T 3 x EF 10V DC AQ DC V 1 1 EF 2V V Se t 10V AQ SO 2V + e Fre ol Co B SO + SR SR IAQ SENSOR 5 Min s Po C D A RETURN AIR TEMPERATURE OR ENTHALPY SENSOR Fig. 40 — Return Air Temperature or Enthalpy Sensor Mounting Location 27 100 enter the building. Make minimum position adjustments with at least 10° F temperature difference between the outdoor and return-air temperatures. To determine the minimum position setting, perform the following procedure: 1. Calculate the appropriate mixed-air temperature using the following formula: OA RA (TO x ) + (TR x ) = TM 100 100 TO = Outdoor-Air Temperature OA = Percent of Outdoor Air TR = Return-Air Temperature RA = Percent of Return Air TM = Mixed-Air Temperature As an example, if local codes require 10% outdoor air during occupied conditions, outdoor-air temperature is 60 F, and return-air temperature is 75 F. (60 x .10) + (75 x .90) = 73.5 F 2. Disconnect the supply-air sensor from terminals T and T1. 3. Ensure that the factory-installed jumper is in place across terminals P and P1. If remote damper positioning is being used, make sure that the terminals are wired according to Fig. 36 and that the minimum position potentiometer is turned fully clockwise. 4. Connect 24 vac across terminals TR and TR1. 5. Carefully adjust the minimum position potentiometer until the measured mixed-air temperature matches the calculated value. 6. Reconnect the supply-air sensor to terminals T and T1. Remote control of the EconoMi$erIV damper is desirable when requiring additional temporary ventilation. If a field-supplied remote potentiometer (Honeywell part number S963B1128) is wired to the EconoMi$erIV controller, the minimum position of the damper can be controlled from a remote location. To control the minimum damper position remotely, remove the factory-installed jumper on the P and P1 terminals on the EconoMi$erIV controller. Wire the field-supplied potentiometer to the P and P1 terminals on the EconoMi$erIV controller. See Fig. 40. Damper Movement — Damper movement from full open to full closed (or vice versa) takes 21/2 minutes. Thermostats — The EconoMi$erIV control works with conventional thermostats that have a Y1 (cool stage 1), Y2 (cool stage 2), W1 (heat stage 1), W2 (heat stage 2), and G (fan). The EconoMi$erIV control does not support space temperature sensors. Connections are made at the thermostat terminal connection board located in the main control box. Occupancy Control — The factory default configuration for the EconoMi$erIV control is occupied mode. Occupied status is provided by the black jumper from terminal TB2-9 to terminal TB2-10. When unoccupied mode is desired, install a fieldsupplied timeclock function in place of the jumper between terminals TB2-9 and TB2-10. See Fig. 36. When the timeclock contacts are closed, the EconoMi$erIV control will be in occupied mode. When the timeclock contacts are open (removing the 24-v signal from terminal N), the EconoMi$erIV will be in unoccupied mode. Demand Controlled Ventilation (DCV) — When using the EconoMi$erIV for demand controlled ventilation, there are some equipment selection criteria which should be considered. When selecting the heat capacity and cool capacity of the equipment, the maximum ventilation rate must be evaluated for design conditions. The maximum damper position must be calculated to provide the desired fresh air. Outdoor Enthalpy Changeover — For enthalpy control, accessory enthalpy sensor (part number HH57AC078) is required. Replace the standard outdoor dry bulb temperature sensor with the accessory enthalpy sensor in the same mounting location. See Fig. 33. When the outdoor air enthalpy rises above the outdoor enthalpy changeover set point, the outdoorair damper moves to its minimum position. The outdoor enthalpy changeover set point is set with the outdoor enthalpy set point potentiometer on the EconoMi$erIV controller. The set points are A, B, C, and D. See Fig. 41. The factory-installed 620-ohm jumper must be in place across terminals SR and SR+ on the EconoMi$erIV controller. See Fig. 33 and 42. Differential Enthalpy Control — For differential enthalpy control, the EconoMi$erIV controller uses two enthalpy sensors (HH57AC078 and CRENTDIF004A00), one in the outside air and one in the return airstream or the EconoMi$erIV frame. The EconoMi$erIV controller compares the outdoor air enthalpy to the return air enthalpy to determine EconoMi$erIV use. The controller selects the lower enthalpy air (return or outdoor) for cooling. For example, when the outdoor air has a lower enthalpy than the return air and is below the set point, the EconoMi$erIV opens to bring in outdoor air for free cooling. Replace the standard outside air dry bulb temperature sensor with the accessory enthalpy sensor in the same mounting location. See Fig. 33. Mount the return air enthalpy sensor in the return airstream. See Fig. 40. The outdoor enthalpy changeover set point is set with the outdoor enthalpy set point potentiometer on the EconoMi$erIV controller. When using this mode of changeover control, turn the enthalpy set point potentiometer fully clockwise to the D setting. NOTE: Remove 620-ohm resistor if differential enthalpy sensor is installed. Indoor Air Quality (IAQ) Sensor Input — The IAQ input can be used for demand control ventilation control based on the level of CO2 measured in the space or return air duct. Mount the accessory IAQ sensor according to manufacturer specifications. The IAQ sensor should be wired to the AQ and AQ1 terminals of the controller. Adjust the DCV potentiometers to correspond to the DCV voltage output of the indoor air quality sensor at the user-determined set point. See Fig. 43. If a separate field-supplied transformer is used to power the IAQ sensor, the sensor must not be grounded or the EconoMi$erIV control board will be damaged. Exhaust Set Point Adjustment — The exhaust set point will determine when the exhaust fan runs based on damper position (if accessory power exhaust is installed). The set point is modified with the Exhaust Fan Set Point (EXH SET) potentiometer. See Fig. 36. The set point represents the damper position above which the exhaust fan will be turned on. When there is a call for exhaust, the EconoMi$erIV controller provides a 45 ± 15 second delay before exhaust fan activation to allow the dampers to open. This delay allows the damper to reach the appropriate position to avoid unnecessary fan overload. Minimum Position Control — There is a minimum damper position potentiometer on the EconoMi$erIV controller. See Fig. 36. The minimum damper position maintains the minimum airflow into the building during the occupied period. When using demand ventilation, the minimum damper position represents the minimum ventilation position for VOC (volatile organic compound) ventilation requirements. The maximum demand ventilation position is used for fully occupied ventilation. When demand ventilation control is not being used, the minimum position potentiometer should be used to set the occupied ventilation position. The maximum demand ventilation position should be turned fully clockwise. Adjust the minimum position potentiometer to allow the minimum amount of outdoor air, as required by local codes, to 28 Typically the maximum ventilation rate will be about 5 to 10% more than the typical cfm required per person, using normal outside air design criteria. A proportional anticipatory strategy should be taken with the following conditions: a zone with a large area, varied occupancy, and equipment that cannot exceed the required ventilation rate at design conditions. Exceeding the required ventilation rate means the equipment can condition air at a maximum ventilation rate that is greater than the required ventilation rate for maximum occupancy. A proportional-anticipatory strategy will cause the fresh air supplied to increase as the room CO2 level increases even though the CO2 set point has not been reached. By the time the CO2 level reaches the set point, the damper will be at maximum ventilation and should maintain the set point. 46 85 90 95 100 105 110 (29) (32) (35) (38) (41) (43) 44 CONTROL CONTROL POINT CURVE APPROX. °F (°C) AT 50% RH 73 (23) A 70 (21) B 67 (19) C 63 (17) D 36 75 (24) EH RE 30 U 70 (21) 16 12 14 50 (10) 40 (4) 45 (7) A 30 18 55 (13) B 40 20 60 (16) 50 22 60 70 24 65 (18) 80 10 0 90 8 EN TH AL 26 PY — 2 BT LA TIV 32 PE R 34 PO UN D UM ID DR Y IT Y 38 AI R (% ) 40 42 80 (27) C 20 D 10 35 (2) B A D C 35 (2) 40 (4) 45 (7) HIGH LIMIT CURVE 55 60 65 70 75 80 85 90 95 100 105 110 (13) (16) (18) (21) (24) (27) (29) (32) (35) (38) (41) (43) 50 (10) APPROXIMATE DRY BULB TEMPERATURE— °F (°C) Fig. 41 — Enthalpy Changeover Set Points EXH N1 2V EXH P1 P Min Pos T1 DCV 2V SO+ SO SR CO2 SENSOR MAX RANGE SETTING 24 Vac HOT 6000 24 Vac COM + _ 1 2 Max 10V 5 DCV AQ SR+ TR1 Open T AQ1 TR Set 10V RANGE CONFIGURATION (ppm) N 2V DCV Set 10V Free Cool B C A D 3 4 EF EF1 5000 4000 800 ppm 900 ppm 1000 ppm 1100 ppm 3000 2000 1000 0 2 3 4 5 6 7 8 DAMPER VOLTAGE FOR MAX VENTILATION RATE Fig. 42 — EconoMi$erIV Controller Fig. 43 — CO2 Sensor Maximum Range Setting 29 CO 2 Sensor Configuration — The CO2 sensor has preset standard voltage settings that can be selected anytime after the sensor is powered up. See Table 13. Use setting 1 or 2 for Carrier equipment. See Table 13. 1. Press Clear and Mode buttons. Hold at least 5 seconds until the sensor enters the Edit mode. 2. Press Mode twice. The STDSET Menu will appear. 3. Use the Up/Down button to select the preset number. See Table 13. 4. Press Enter to lock in the selection. 5. Press Mode to exit and resume normal operation. The custom settings of the CO2 sensor can be changed anytime after the sensor is energized. Follow the steps below to change the non-standard settings: 1. Press Clear and Mode buttons. Hold at least 5 seconds until the sensor enters the Edit mode. 2. Press Mode twice. The STDSET Menu will appear. 3. Use the Up/Down button to toggle to the NONSTD menu and press Enter. 4. Use the Up/Down button to toggle through each of the nine variables, starting with Altitude, until the desired setting is reached. 5. Press Mode to move through the variables. 6. Press Enter to lock in the selection, then press Mode to continue to the next variable. Dehumidification of Fresh Air with DCV Control — Information from ASHRAE indicates that the largest humidity load on any zone is the fresh air introduced. For some applications, a field-installed energy recovery unit can be added to reduce the moisture content of the fresh air being brought into the building when the enthalpy is high. In most cases, the normal heating and cooling processes are more than adequate to remove the humidity loads for most commercial applications. If normal rooftop heating and cooling operation is not adequate for the outdoor humidity level, an energy recovery unit and/or a dehumidification option should be considered. In order to have the CO2 sensor control the economizer damper in this manner, first determine the damper voltage output for minimum or base ventilation. Base ventilation is the ventilation required to remove contaminants during unoccupied periods. The following equation may be used to determine the percent of outside-air entering the building for a given damper position. For best results there should be at least a 10 degree difference in outside and return-air temperatures. (TO x OA RA ) + (TR x ) = TM 100 100 TO = Outdoor-Air Temperature OA = Percent of Outdoor Air TR = Return-Air Temperature RA = Percent of Return Air TM = Mixed-Air Temperature Once base ventilation has been determined, set the minimum damper position potentiometer to the correct position. The same equation can be used to determine the occupied or maximum ventilation rate to the building. For example, an output of 3.6 volts to the actuator provides a base ventilation rate of 5% and an output of 6.7 volts provides the maximum ventilation rate of 20% (or base plus 15 cfm per person). Use Fig. 43 to determine the maximum setting of the CO2 sensor. For example, a 1100 ppm set point relates to a 15 cfm per person design. Use the 1100 ppm curve on Fig. 43 to find the point when the CO2 sensor output will be 6.7 volts. Line up the point on the graph with the left side of the chart to determine that the range configuration for the CO2 sensor should be 1800 ppm. The EconoMi$erIV controller will output the 6.7 volts from the CO2 sensor to the actuator when the CO2 concentration in the space is at 1100 ppm. The DCV set point may be left at 2 volts since the CO2 sensor voltage will be ignored by the EconoMi$erIV controller until it rises above the 3.6 volt setting of the minimum position potentiometer. Once the fully occupied damper position has been determined, set the maximum damper demand control ventilation potentiometer to this position. Do not set to the maximum position as this can result in over-ventilation to the space and potential high-humidity levels. Table 13 — CO2 Sensor Standard Settings OUTPUT VENTILATION RATE (cfm/Person) Proportional Any Proportional Any 3 Exponential Any 4 Proportional 15 Proportional 20 6 Exponential 15 7 Exponential 20 SETTING EQUIPMENT 1 2 Interface with Standard Building Control System 5 Economizer 8 Health & Safety Proportional — 9 Parking/Air Intakes/ Loading Docks Proportional — ANALOG OUTPUT 0-10V 4-20 mA 2-10V 7-20 mA 0-10V 4-20 mA 0-10V 4-20 mA 0-10V 4-20 mA 0-10V 4-20 mA 0-10V 4-20 mA 0-10V 4-20 mA 0-10V 4-20 mA LEGEND ppm — Parts Per Million 30 CO2 CONTROL RANGE (ppm) OPTIONAL RELAY SETPOINT (ppm) RELAY HYSTERESIS (ppm) 0-2000 1000 50 0-2000 1000 50 0-2000 1100 50 0-1100 1100 50 0- 900 900 50 0-1100 1100 50 0- 900 900 50 0-9999 5000 500 0-2000 700 50 Step 14 — Install Humidistat for Optional MoistureMi$er™ Package — MoistureMi$er dehumidification package operation can be controlled by field installation of a Carrier-approved humidistat. To install the humidistat perform the following procedure: 1. Locate humidistat on a solid interior wall in the conditioned space. Location should be a well ventilated area to sense average humidity. 2. Route thermostat cable or equivalent single leads of colored wire from Humidistat terminals through conduit in unit to the low voltage connection on the 2-pole terminal strip (TB3) as shown in Fig. 44 and Fig. 45. See Fig. 46 for operational diagram. Fig. 45 — Typical MoistureMi$er Dehumidification Package Control Box MOISTUREMI$ER YEL YEL TO CRANKCASE HEATER CIRCUITS BLK BLK BLK ORN RED BLK ORN YEL TRAN1 RED BLK YEL TRAN3 24V A 24V A C GRN-YEL BLK C GRN-YEL BLK CB LLSV LPS TB TRAN — — — — — LEGEND Circuit Breaker Liquid Line Solenoid Valve Low-Pressure Switch Terminal Block Transformer S-LPS1 LLSV1 TB3 CB4 11 21 3.2 AMPS 1 2 BLK S-LPS2 FACTORY INSTALLED JUMPER (OR HUMIDISTAT IF USED) Fig. 44 — Typical MoistureMi$er Dehumidification Package Humidistat Wiring Schematic (460 V Unit Shown) 31 LLSV2 TXV — Thermostatic Expansion Valve Fig. 46 — MoistureMi$er™ Dehumidification Operation Diagram 32 START-UP CRANKCASE HEATER — Crankcase heater(s) is energized as long as there is power to the unit and the compressor is not operating. Use the following information and Start-Up Checklist on page CL-1 to check out unit PRIOR to start-up. IMPORTANT: Unit power must be on for 24 hours prior to start-up. Otherwise, damage to the compressor may result. Unit Preparation — Check that unit has been installed in accordance with these installation instructions and all applicable codes. COMPRESSOR MOUNTING — Compressors are internally spring mounted. Do not loosen or remove compressor holddown bolts. REFRIGERANT SERVICE PORTS — Each refrigerant system has a total of 3 Schrader-type service gage ports. One port is located on the suction line, one on the compressor discharge line, and one on the liquid line. In addition Schrader-type valves are located underneath the low-pressure switches. Be sure that caps on the ports are tight. COMPRESSOR ROTATION — It is important to be certain the compressors are rotating in the proper direction. To determine whether or not compressors are rotating in the proper direction: 1. Connect service gages to suction and discharge pressure fittings. 2. Energize the compressor. 3. The suction pressure should drop and the discharge pressure should rise, as is normal on any start-up. If the suction pressure does not drop and the discharge pressure does not rise to normal levels: 1. Note that the evaporator fan is probably also rotating in the wrong direction. 2. Turn off power to the unit. 3. Reverse any two of the incoming power leads. 4. Turn on power to the compressor. The suction and discharge pressure levels should now move to their normal start-up levels. NOTE: When compressors are rotating in the wrong direction, the unit will have increased noise levels and will not provide heating and cooling. After a few minutes of reverse operation, the scroll compressor internal overload protection will open, which will activate the unit’s lockout and requires a manual reset. Reset is accomplished by turning the thermostat on and off. INTERNAL WIRING — Check all electrical connections in unit control boxes; tighten as required. GAS PIPING — Check gas piping for leaks. EVAPORATOR FAN — Fan belt and variable pulleys are factory-installed. See Tables 14-21 for fan performance data. Be sure that fans rotate in the proper direction. See Table 22 for air quantity limits. See Table 23 for static pressure information for accessories and options. See Table 24 for fan rpm at various motor pulley settings. See Tables 25 and 26 for evaporator fan motor data. To alter fan performance, see Evaporator Fan Performance Adjustment section on page 44. NOTE: A 31/2-in. bolt and threaded plate are included in the installer’s packet. They can be added to the motor support channel below the motor mounting plate to aid in raising the fan motor. CONDENSER-FANS AND MOTORS — Condenser fans and motors are factory set. Refer to Condenser-Fan Adjustment section on page 45 as required. Be sure that fans rotate in the proper direction. RETURN-AIR FILTERS — Check that correct filters are installed in filter tracks (see Table 1). Do not operate unit without return-air filters. OUTDOOR-AIR INLET SCREENS — Outdoor-air inlet screens must be in place before operating unit. GAS HEAT — Verify gas pressures before turning on heat as follows: 1. Turn off manual gas stop. 2. Connect pressure gage to supply gas pressure tap (see Fig. 14). 3. Connect pressure gage to manifold pressure tap on gas valve. 4. Turn on manual gas stop and set thermostat to HEAT position. After the unit has run for several minutes, verify that incoming pressure is 5.5 in. wg or greater, and that the manifold pressure is 3.3 in. wg. If manifold pressure must be adjusted, refer to Gas Valve Adjustment section on page 46. 5. After unit has been in operation for 5 minutes, check temperature rise across the heat exchangers. See unit informative plate for correct rise limits of the heat supplied. Air quantities may need to be adjusted to bring the actual rise to within the allowable limits. Disconnect gas piping from unit when leak testing at pressure greater than 1/2 psig. Pressures greater than 1/2 psig will cause gas valve damage resulting in hazardous condition. If gas valve is subjected to pressure greater than 1/2 psig, it must be replaced before use. When pressure testing fieldsupplied gas piping at pressures of 1/2 psig or less, a unit connected to such piping must be isolated by manually closing the gas valve. 33 Table 14 — Fan Performance — 48TMD016 (Low Heat Units)* AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 4500 4800 5100 5700 6000 6300 6600 6900 7200 7500 Rpm 753 747 741 810 844 879 915 950 986 1022 0.2 Watts 1307 1384 1465 1911 2164 2439 2737 3057 3401 3770 Rpm 1044 1065 1086 1132 1157 1182 1208 1235 1262 — 1.2 Watts 2345 2561 2795 3324 3619 3935 4274 4636 5021 — Rpm 1322 1337 1353 1388 — — — — — — 2.2 Watts 3781 4025 4290 4881 — — — — — — Bhp 1.53 1.62 1.72 2.24 2.54 2.86 3.21 3.59 3.99 4.42 Rpm 761 790 820 882 914 947 980 1013 1047 1081 0.4 Watts 1330 1515 1718 2182 2444 2729 3035 3364 3717 4095 Rpm 1105 1124 1144 1187 1210 1234 1259 1285 — — 1.4 Watts 2619 2841 3082 3624 3925 4249 4595 4964 — — Rpm 1372 1386 1401 — — — — — — — 2.4 Watts 4088 4337 4607 — — — — — — — Bhp 1.56 1.78 2.01 2.56 2.87 3.20 3.56 3.95 4.36 4.80 Rpm 840 866 893 950 980 1010 1041 1072 1104 1136 0.6 Watts 1572 1765 1977 2459 2730 3023 3338 3675 4037 4423 Bhp 1.84 2.07 2.32 2.88 3.20 3.55 3.91 4.31 4.74 5.19 Rpm 912 936 961 1014 1042 1070 1099 1129 1159 1189 0.8 Watts 1822 2023 2243 2741 3021 3322 3645 3991 4361 4755 Bhp 2.14 2.37 2.63 3.21 3.54 3.90 4.28 4.68 5.11 5.58 Rpm 980 1002 1025 1075 1100 1127 1155 1183 1211 1241 1.0 Watts 2080 2289 2516 3029 3317 3626 3957 4311 4689 5091 Bhp 2.44 2.68 2.95 3.55 3.89 4.25 4.64 5.06 5.50 5.97 Bhp 3.74 4.01 4.31 4.97 5.34 5.74 — — — — Rpm 1271 1287 1304 1341 1361 — — — — — 2.0 Watts 3481 3720 3979 4558 4880 — — — — — Bhp 4.08 4.36 4.67 5.35 5.72 — — — — — Bhp 5.53 5.84 — — — — — — — — Rpm 1511 — — — — — — — — — 3.0 Watts 5042 — — — — — — — — — Bhp 5.91 — — — — — — — — — AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 4500 4800 5100 5700 6000 6300 6600 6900 7200 7500 Bhp 2.75 3.00 3.28 3.90 4.24 4.62 5.01 5.44 5.89 — Bhp 3.07 3.33 3.61 4.25 4.60 4.98 5.39 5.82 — — Rpm 1163 1180 1199 1240 1262 1285 1309 — — — 1.6 Watts 2899 3127 3375 3929 4239 4569 4922 — — — Bhp 3.40 3.67 3.96 4.61 4.97 5.36 5.77 — — — Rpm 1218 1235 1252 1291 1312 1334 — — — — 1.8 Watts 3187 3420 3674 4241 4557 4894 — — — — AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 4500 4800 5100 5700 6000 6300 6600 6900 7200 7500 Bhp 4.43 4.72 5.03 5.72 — — — — — — Bhp 4.79 5.09 5.40 — — — — — — — Rpm 1419 1433 1448 — — — — — — — 2.6 Watts 4400 4655 4930 — — — — — — — Bhp 5.16 5.46 5.78 — — — — — — — Rpm 1466 1479 — — — — — — — — 2.8 Watts 4719 4978 — — — — — — — — Refer to page 39 for general Fan Performance Data notes. LEGEND Bhp — Brake Horsepower Watts — Input Watts to Motor NOTE: Maximum continuous bhp for the standard motor is 6.13. The maximum continuous watts is 5180. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm. See Table 25 for more information. *Standard low-medium static drive range is 873 to 1021 rpm. Alternate high-static drive range is 1025 to 1200. Other rpms require a field-supplied drive. 34 Table 15 — Fan Performance — 48TMF016 (High Heat Units)* AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 4500 4800 5100 5700 6000 6300 6600 6900 7200 7500 Rpm 753 747 775 849 886 924 962 1000 1038 1077 0.2 Watts 1307 1384 1571 2054 2329 2628 2951 3298 3672 4072 Rpm 1060 1082 1106 1157 1184 1212 1241 1270 — — 1.2 Watts 2414 2644 2894 3459 3774 4114 4478 4866 — — Rpm 1332 1349 1367 1407 — — — — — — 2.2 Watts 3841 4100 4380 5007 — — — — — — Bhp 1.53 1.62 1.84 2.41 2.73 3.08 3.46 3.87 4.31 4.78 Rpm 786 818 850 918 952 987 1023 1059 1095 1131 0.4 Watts 1404 1603 1822 2323 2607 2915 3246 3603 3986 4394 Rpm 1119 1140 1163 1211 1236 1263 1290 — — — 1.4 Watts 2685 2922 3178 3757 4080 4427 4798 — — — Rpm 1381 1397 1414 — — — — — — — 2.4 Watts 4145 4409 4695 — — — — — — — Bhp 1.65 1.88 2.14 2.73 3.06 3.42 3.81 4.23 4.67 5.15 Rpm 861 890 920 982 1015 1047 1081 1115 1149 1184 0.6 Watts 1644 1852 2079 2598 2891 3207 3547 3912 4303 4720 Bhp 1.93 2.17 2.44 3.05 3.39 3.76 4.16 4.59 5.05 5.54 Rpm 932 958 986 1044 1074 1105 1136 1168 1201 1234 0.8 Watts 1893 2108 2344 2879 3180 3504 3853 4225 4625 5050 Bhp 2.22 2.47 2.75 3.38 3.73 4.11 4.52 4.96 5.42 5.92 Rpm 997 1022 1048 1102 1130 1160 1190 1220 1251 — 1.0 Watts 2150 2373 2616 3166 3474 3807 4163 4543 4950 — Bhp 2.52 2.78 3.07 3.71 4.08 4.46 4.88 5.33 5.81 — Bhp 3.81 4.10 4.42 5.13 5.52 5.94 — — — — Rpm 1282 1299 1319 1360 1382 — — — — — 2.0 Watts 3542 3795 4071 4686 5029 — — — — — Bhp 4.15 4.45 4.77 5.50 5.90 — — — — — Bhp 5.60 5.92 — — — — — — — — Rpm 1518 — — — — — — — — — 3.0 Watts 5095 — — — — — — — — — Bhp 5.98 — — — — — — — — — AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 4500 4800 5100 5700 6000 6300 6600 6900 7200 7500 Bhp 2.83 3.10 3.39 4.06 4.43 4.83 5.25 5.71 — — Bhp 3.15 3.43 3.73 4.41 4.79 5.19 5.63 — — — Rpm 1175 1195 1216 1262 1287 1312 1338 — — — 1.6 Watts 2964 3207 3470 4061 4391 4745 5122 — — — Bhp 3.48 3.76 4.07 4.76 5.15 5.57 6.01 — — — Rpm 1230 1248 1268 1312 1335 1359 — — — — 1.8 Watts 3250 3498 3767 4371 4707 5067 — — — — AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 4500 4800 5100 5700 6000 6300 6600 6900 7200 7500 Bhp 4.50 4.81 5.14 5.87 — — — — — — Bhp 4.86 5.17 5.51 — — — — — — — Rpm 1428 1443 1460 — — — — — — — 2.6 Watts 4456 4725 5016 — — — — — — — Bhp 5.23 5.54 5.88 — — — — — — — Rpm 1473 1488 — — — — — — — — 2.8 Watts 4772 5046 — — — — — — — — Refer to page 39 for general Fan Performance Data notes. LEGEND Bhp — Brake Horsepower Watts — Input Watts to Motor NOTE: Maximum continuous bhp for the standard motor is 6.13. The maximum continuous watts is 5180. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm. See Table 25 for more information. *Standard low-medium static drive range is 873 to 1021 rpm. Alternate high-static drive range is 1025 to 1200. Other rpms require a field-supplied drive. 35 Table 16 — Fan Performance — 48TMD020 (Low Heat Units)* AIRFLOW (cfm) 5,500 6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000 AIRFLOW (cfm) 5,500 6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000 Rpm 755 810 866 923 980 1038 1096 1154 1213 1272 0.2 Bhp 2.27 2.72 3.22 3.78 4.39 5.06 5.78 6.56 7.40 8.30 Rpm 1149 1183 1219 1258 1299 1341 1385 1431 1478 — 1.4 Bhp 4.28 4.76 5.29 5.88 6.52 7.21 7.97 8.78 9.65 — Watts 1908 2287 2710 3177 3690 4251 4859 5517 6224 6983 Watts 3602 4003 4450 4942 5480 6065 6699 7382 8114 — AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.6 0.8 Watts Rpm Bhp Watts Rpm Bhp Watts Rpm 2171 901 2.91 2443 968 3.24 2723 1031 2556 947 3.37 2833 1010 3.71 3116 1070 2985 994 3.88 3266 1054 4.23 3554 1111 3458 1044 4.45 3744 1100 4.80 4036 1155 3976 1094 5.07 4267 1148 5.43 4564 1200 4542 1146 5.75 4838 1197 6.11 5138 1246 5156 1198 6.49 5456 1247 6.85 5761 1294 5818 1251 7.28 6123 1298 7.65 6432 1343 6531 1306 8.13 6840 1350 8.51 7154 1394 7294 1360 9.05 7608 1403 9.43 7926 1445 Rpm 831 881 932 985 1038 1093 1148 1204 1260 1317 0.4 Bhp 2.58 3.04 3.55 4.11 4.73 5.40 6.13 6.92 7.77 8.67 Rpm 1204 1236 1270 1307 1346 1387 1429 1473 1519 — AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.6 1.8 1.9 Bhp Watts Rpm Bhp Watts Rpm Bhp 4.65 3907 1258 5.02 4217 1284 5.20 5.13 4310 1288 5.50 4622 1313 5.68 5.66 4759 1320 6.03 5073 1344 6.22 6.25 5253 1355 6.62 5569 1378 6.81 6.89 5794 1392 7.27 6113 1415 7.46 7.59 6383 1392 7.97 6704 1453 8.16 8.35 7019 1472 8.73 7343 1493 8.93 9.15 7705 1515 9.55 8032 1535 9.75 10.04 8441 — — — — — — — — — — — — Watts 4375 4780 5232 5729 6273 6866 7506 8196 — — Rpm 1309 1337 1368 1402 1437 1475 1514 — — — 1.0 Bhp 3.58 4.05 4.57 5.15 5.78 6.47 7.22 8.02 8.88 9.81 Watts 3009 3406 3847 4333 4864 5443 6070 6745 7471 8247 2.0 Bhp 5.39 5.87 6.41 7.00 7.65 8.36 9.12 — — — Watts 4533 4939 5391 5890 6435 7028 7670 — — — Rpm 1091 1127 1166 1207 1250 1294 1340 1388 1436 1486 1.2 Bhp 3.93 4.40 4.93 5.51 6.15 6.84 7.59 8.40 9.26 10.19 Watts 3302 3702 4146 4635 5170 5752 6382 7062 7791 8570 Refer to page 39 for general Fan Performance Data notes. NOTE: Maximum continuous bhp is 5.90. The maximum continuous watts is 5180. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm. See Table 25 for more information. LEGEND Bhp — Brake Horsepower Watts — Input Watts to Motor *Standard low-medium static drive range is 910 to 1095 rpm. Alternate highstatic drive range is 1069 to 1287. Other rpms require a field-supplied drive. Table 17 — Fan Performance — 48TMF020 (High Heat Units)* AIRFLOW (cfm) 5,500 6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000 AIRFLOW (cfm) 5,500 6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000 Rpm 795 854 914 975 1037 1099 1161 1223 1286 1349 Rpm 1173 1211 1252 1295 1340 1388 1436 1486 1538 — 0.2 Bhp 2.43 2.92 3.46 4.06 4.72 5.44 6.22 7.07 7.98 8.95 Watts 2043 2452 2909 3414 3969 4575 5232 5943 6708 7528 1.4 Bhp 4.44 4.95 5.53 6.16 6.85 7.60 8.41 9.28 10.22 — Watts 3732 4165 4646 5176 5756 6388 7071 7807 8597 — Rpm 866 921 977 1034 1092 1150 1210 1270 1331 1392 Rpm 1227 1263 1302 1343 1386 1431 1478 1527 — — 0.4 Bhp 2.74 3.24 3.79 4.39 5.06 5.79 6.57 7.43 8.34 9.32 AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.6 0.8 Watts Rpm Bhp Watts Rpm Bhp Watts Rpm 2306 934 3.07 2578 998 3.40 2856 1059 2722 984 3.57 3998 1044 3.90 3281 1102 3184 1036 4.12 3465 1093 4.46 3752 1148 3695 1090 4.73 3981 1144 5.08 4272 1196 4255 1145 5.41 4546 1196 5.76 4842 1256 4866 1201 6.14 5162 1249 6.50 5462 1297 5529 1258 6.93 5829 1304 7.29 6134 1349 6245 1315 7.79 6550 1360 8.16 6869 1403 7014 1374 8.71 7324 1416 9.08 7638 1457 7839 1433 9.70 8154 1473 10.07 8471 — AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.6 1.8 1.9 Bhp Watts Rpm Bhp Watts Rpm Bhp 4.80 4036 1279 5.17 4345 1304 5.35 5.32 4471 1313 5.69 4782 1337 5.87 5.89 4954 1350 6.26 5267 1373 6.56 6.52 5487 1389 6.90 5802 1412 7.09 7.22 6070 1431 7.60 6387 1452 7.79 7.97 6704 1474 8.35 7024 1495 8.54 8.79 7390 1520 9.17 7713 1540 9.37 9.67 8130 — — — — — — — — — — — — — — — — — — — Watts 4502 4939 5425 5961 6547 7186 7876 — — — Rpm 1329 1361 1396 1434 1474 1516 — — — — 1.0 Bhp 3.74 4.25 4.81 5.43 6.12 6.86 7.66 8.53 9.46 — Watts 3142 3570 4045 4569 5142 5766 6443 7171 7954 — 2.0 Bhp 5.54 6.06 6.64 7.28 7.98 8.74 — — — — Watts 4629 5097 5584 6121 6709 7348 — — — — Rpm 1117 1158 1201 1246 1294 1343 1393 1445 1498 — 1.2 Bhp 4.08 4.60 5.16 5.79 6.48 7.22 8.03 8.90 9.84 — Watts 3434 3865 4343 4870 5447 6075 6755 7487 8274 — Refer to page 39 for general Fan Performance Data notes. NOTE: Maximum continuous bhp is 5.90. The maximum continuous watts is 5180. Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm. See Table 25 for more information. LEGEND Bhp — Brake Horsepower Watts — Input Watts to Motor *Standard low-medium static drive range is 910 to 1095 rpm. Alternate highstatic drive range is 1069 to 1287. Other rpms require a field-supplied drive. 36 Table 18 — Fan Performance — 48TMD025 (Low Heat Units)* AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000 Rpm 824 881 939 998 1056 1116 1175 1235 1295 0.2 Watts 2607 3030 3488 3982 4512 5077 5678 6315 6988 Rpm 1141 1181 1223 1267 1313 1360 1408 1458 1508 1.2 Watts 3829 4247 4702 5194 5721 6285 6885 7521 8193 Rpm 1399 1429 1462 1498 1535 — — — — 2.2 Watts 5118 5527 5974 6459 6981 — — — — Bhp 3.09 3.59 4.14 4.72 5.35 6.02 6.74 7.49 8.29 Rpm 894 947 1001 1055 1111 1167 1224 1282 1340 0.4 Watts 2844 3266 3725 4218 4748 5314 5915 6552 7225 Rpm 1196 1234 1274 1316 1359 1405 1451 1499 1549 1.4 Watts 4082 4499 4953 5443 5970 6533 7132 7768 8440 Rpm 1446 1475 1507 1540 — — — — — 2.4 Watts 5381 5789 6234 6717 — — — — — Bhp 3.37 3.88 4.42 5.00 5.63 6.30 7.02 7.77 8.57 Rpm 961 1009 1060 1111 1164 1218 1272 1327 1383 0.6 Watts 3085 3507 3965 4458 4988 5553 6154 6791 7465 Bhp 3.66 4.16 4.70 5.29 5.92 6.59 7.30 8.06 8.86 Rpm 1023 1069 1116 1165 1215 1266 1319 1372 1426 0.8 Watts 3330 3751 4208 4701 5230 5795 6395 7033 7706 Bhp 3.95 4.45 4.99 5.58 6.20 6.87 7.59 8.34 9.14 Rpm 1083 1126 1170 1217 1264 1314 1364 1415 1468 1.0 Watts 3578 3998 4454 4946 5474 6039 6639 7276 7949 Bhp 4.24 4.74 5.28 5.87 6.49 7.16 7.88 8.63 9.43 1.8 Watts 4596 5009 5460 5947 6472 7034 7631 — — Bhp 5.45 5.94 6.48 7.06 7.68 8.34 9.05 — — Rpm 1351 1383 1417 1454 1493 1533 — — — 2.0 Watts 4856 5267 5716 6202 6726 7286 — — — Bhp 5.76 6.25 6.78 7.36 7.98 8.64 — — — 2.8 Watts 5914 — — — — — — — — Bhp 7.02 — — — — — — — — Rpm — — — — — — — — — 3.0 Watts — — — — — — — — — Bhp — — — — — — — — — AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000 Bhp 4.54 5.04 5.58 6.16 6.79 7.46 8.17 8.92 9.72 Bhp 4.84 5.34 5.88 6.46 7.08 7.75 8.46 9.22 10.01 Rpm 1249 1285 1323 1363 1405 1449 1494 1540 — 1.6 Watts 4337 4753 5205 5694 6220 6783 7381 8016 — Bhp 5.15 5.64 6.18 6.76 7.38 8.05 8.76 9.51 — Rpm 1301 1334 1371 1409 1449 1491 1535 — — AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000 Bhp 6.07 6.56 7.09 7.66 8.28 — — — — Bhp 6.38 6.87 7.40 7.97 — — — — — Rpm 1492 1520 1550 — — — — — — 2.6 Watts 5647 6052 6495 — — — — — — Bhp 6.70 7.18 7.71 — — — — — — Rpm 1537 — — — — — — — — Refer to page 39 for general Fan Performance Data notes. LEGEND Bhp — Brake Horsepower Watts — Input Watts to Motor NOTE: Maximum continuous bhp for the standard motor is 8.7 (for 208/230 and 575-v units) and 9.5 (for 460-v units). The maximum continuous watts is 7915 (for 208/230 and 575-v units) and 8640 (for 460-v units). Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm. See Table 25 for additional information. *Standard low-medium static drive range is 1002 to 1151 rpm. Alternate high-static drive range is 1193 to 1369. Other rpms require a field-supplied drive. 37 Table 19 — Fan Performance — 48TMF025 (High Heat Units)* AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000 Rpm 868 929 991 1054 1117 1180 1244 1308 1372 0.2 Watts 2752 3201 3687 4211 4773 5373 6011 6687 7401 Rpm 1171 1215 1262 1310 1360 1412 1465 1519 — 1.2 Watts 3965 4410 4894 5415 5976 6575 7212 7888 — Rpm 1422 1456 1493 1533 — — — — — 2.2 Watts 5243 5679 6155 6670 — — — — — Bhp 3.26 3.80 4.37 5.00 5.66 6.37 7.13 7.93 8.78 Rpm 934 991 1049 1109 1168 1229 1290 1352 1414 0.4 Watts 2987 3436 3923 4447 5009 5609 6247 6924 7638 Rpm 1224 1266 1311 1357 1405 1455 1506 — — 1.4 Watts 4216 4659 5142 5663 6222 6821 7457 — — Rpm 1468 1501 1536 — — — — — — 2.4 Watts 5505 5938 6412 — — — — — — Bhp 3.54 4.08 4.65 5.28 5.94 6.65 7.41 8.21 9.06 Rpm 997 1051 1105 1161 1218 1277 1335 1395 1455 0.6 Watts 3227 3675 4161 4686 5247 5847 6485 7162 7876 Bhp 3.83 4.36 4.94 5.56 6.22 6.94 7.69 8.50 9.34 Rpm 1058 1108 1159 1213 1267 1323 1380 1437 1496 0.8 Watts 3470 3917 4403 4926 5488 6088 6726 7402 8117 Bhp 4.12 4.65 5.22 5.84 6.51 7.22 7.98 8.78 9.63 Rpm 1115 1162 1211 1262 1314 1368 1423 1479 1535 1.0 Watts 3716 4163 4647 5170 5731 6331 6968 7644 8358 Bhp 4.41 4.94 5.51 6.13 6.80 7.51 8.27 9.07 9.92 Bhp 5.61 6.13 6.70 7.31 7.97 8.68 — — — Rpm 1374 1411 1449 1490 1533 — — — — 2.0 Watts 4983 5421 5899 6416 6973 — — — — Bhp 5.91 6.43 7.00 7.61 8.27 — — — — Bhp — — — — — — — — — Rpm — — — — — — — — — 3.0 Watts — — — — — — — — — Bhp — — — — — — — — — AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000 Bhp 4.70 5.23 5.81 6.42 7.09 7.80 8.56 9.36 — Bhp 5.00 5.53 6.10 6.72 7.38 8.09 8.85 — — Rpm 1276 1316 1358 1403 1449 1497 1547 — — 1.6 Watts 4469 4911 5392 5912 6471 7068 7705 — — Bhp 5.30 5.83 6.40 7.01 7.68 8.39 9.14 — — Rpm 1326 1364 1404 1447 1492 1538 — — — 1.8 Watts 4726 5165 5645 6164 6721 7318 — — — AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (cfm) 6,000 6,500 7,000 7,500 8,000 8,500 9,000 9,500 10,000 Bhp 6.22 6.74 7.30 7.91 — — — — — Bhp 6.53 7.04 7.61 — — — — — — Rpm 1513 1544 — — — — — — — 2.6 Watts 5768 6199 — — — — — — — Bhp 6.84 7.35 — — — — — — — Rpm — — — — — — — — — 2.8 Watts — — — — — — — — — Refer to page 39 for general Fan Performance Data notes. LEGEND Bhp — Brake Horsepower Watts — Input Watts to Motor NOTE: Maximum continuous bhp for the standard motor is 8.7 (for 208/230 and 575-v units) and 9.5 (for 460-v units). The maximum continuous watts is 7915 (for 208/230 and 575-v units) and 8640 (for 460-v units). Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm. See Table 25 for more information. *Standard low-medium static drive range is 1002 to 1151 rpm. Alternate high-static drive range is 1193 to 1369. Other rpms require a field-supplied drive. 38 Table 20 — Fan Performance — 48TMD028 (Low Heat Units)* AIRFLOW (cfm) 7,000 7,500 8,000 8,500 9,000 9,500 10,000 10,500 11,000 11,250 AIRFLOW (cfm) 7,000 7,500 8,000 8,500 9,000 9,500 10,000 10,500 11,000 11,250 Rpm 941 999 1058 1117 1177 1237 1297 1358 1418 1449 Rpm 1274 1316 1360 1406 1453 1501 — — — — AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.4 1.6 1.8 Bhp Watts Rpm Bhp Watts Rpm Bhp 6.35 5248 1323 6.92 5,718 1371 5.54 7.20 6960 1364 7.79 6,437 1410 6.41 8.14 6734 1406 8.76 7,239 1450 7.40 9.20 7605 1449 9.83 8,129 1492 8.48 10.36 8568 1495 11.02 9,111 1536 9.69 11.64 9627 1541 12.32 10,190 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — Watts 2,769 3,348 4,007 4,750 5,583 6,511 7,450 8,674 9,919 10,585 Rpm 1002 1057 1113 1169 1226 1284 1342 1400 1459 — 0.4 Bhp 3.80 4.53 5.35 6.28 7.31 8.46 9.74 11.14 12.67 — AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.6 0.8 Watts Rpm Bhp Watts Rpm Bhp Watts Rpm 3,140 1061 4.27 3528 1117 4.76 3,934 1171 3,742 1112 5.02 4152 1166 5.54 4,579 1218 4,424 1165 5.87 4856 1216 6.41 5,304 1266 5,190 1219 6.83 5645 1268 7.40 6,114 1315 6,047 1274 7.89 6524 1320 8.48 7,015 1365 6,999 1329 9.07 7499 1374 9.69 8,012 1417 8,051 1385 10.37 8574 1428 11.02 9,110 1469 9,209 1442 11.80 9755 1483 12.47 10,314 1523 10,478 — — — — — — — — — — — — — — — 0.2 Bhp 3.35 4.05 4.85 5.74 6.75 7.98 9.12 10.49 12.00 12.80 1.0 Bhp 5.27 6.07 6.97 7.98 9.09 10.33 11.68 13.16 — — Watts 4,356 5,020 5,766 6,597 7,520 8,538 9,657 10,883 — — Rpm 1224 1268 1314 1361 1410 1459 1510 — — — 1.2 Bhp 5.80 6.63 7.55 8.58 9.72 10.98 12.36 — — — Watts 4,794 5,478 6,243 7,094 8,037 9,076 10,217 — — — Watts 6204 6939 7759 8666 9667 — — — — — Refer to this page for general Fan Performance Data notes. NOTE: Maximum continuous bhp is 10.20 (208/230, 575 v) or 11.80 (460 v) and the maximum continuous watts are 9510 (208/230, 575 v) or 11,000 (460 v). Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm. See Table 25 for more information. LEGEND Bhp — Brake Horsepower Watts — Input Watts to Motor *Standard low-medium static drive range is 1066 to 1283 rpm. Alternate highstatic drive range is 1332 to 1550. Other rpms require a field-supplied drive. Table 21 — Fan Performance — 48TMF028 (High Heat Units)* AIRFLOW (cfm) 7,000 7,500 8,000 8,500 9,000 9,500 10,000 10,500 11,000 11,250 AIRFLOW (cfm) 7,000 7,500 8,000 8,500 9,000 9,500 10,000 10,500 11,000 11,250 Rpm 992 1055 1118 1182 1246 1310 1374 1439 1503 1536 0.2 Bhp 4.05 4.77 5.58 6.46 7.42 8.47 9.61 10.84 12.17 12.86 Rpm 1311 1358 1406 1456 1507 — — — — — Watts 3,348 3,947 4,610 5,339 6,136 7,005 7,947 8,964 10,059 10,636 Rpm 1051 1110 1170 1231 1292 1354 1416 1479 1542 — 0.4 Bhp 4.44 5.17 5.99 6.88 7.86 8.92 10.07 11.32 12.65 — AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.6 0.8 Watts Rpm Bhp Watts Rpm Bhp Watts Rpm 3,668 1106 4.83 3995 1160 5.24 4331 1212 4,277 1162 5.58 4615 1214 6.00 4960 1263 4,950 1220 6.41 5298 1268 6.84 5653 1315 5,690 1278 7.31 6047 1324 7.75 6411 1369 6,498 1337 8.30 6865 1381 8.75 7239 1424 7,377 1397 9.38 7754 1439 9.84 8137 1480 8,329 1457 10.54 8715 1497 11.02 9107 1537 9,356 1518 11.79 9752 — — — — 10,460 — — — — — — — — — — — — — — — AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1.4 1.6 1.8 Bhp Watts Rpm Bhp Watts Rpm Bhp 6.51 5385 1359 6.96 5751 1405 6.00 7.30 6039 1403 7.76 6412 1448 6.84 8.17 6767 1560 8.63 7137 1492 7.75 9.12 7541 1498 9.59 7929 1539 8.75 10.15 8393 1548 10.63 8790 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — 1.0 Bhp 5.65 6.43 7.27 8.20 9.21 10.31 11.50 — — — Watts 4675 5312 6014 6782 7618 8525 9504 — — — Rpm 1262 1311 1361 1413 1466 1520 — — — — 1.2 Bhp 6.08 6.86 7.72 8.66 9.68 10.79 — — — — Watts 5026 5672 6382 7158 8003 8918 — — — — Watts 6124 6792 7524 8323 — — — — — — Refer to this page for general Fan Performance Data notes. NOTE: Maximum continuous bhp is 10.20 (208/230, 575 v) or 11.80 (460 v) and the maximum continuous watts are 9510 (208/230, 575 v) or 11,000 (460 v). Do not adjust motor rpm such that motor maximum bhp and/or watts is exceeded at the maximum operating cfm. See Table 25 for more information. LEGEND Bhp — Brake Horsepower Watts — Input Watts to Motor *Standard low-medium static drive range is 1066 to 1283 rpm. Alternate highstatic drive range is 1332 to 1550. Other rpms require a field-supplied drive. GENERAL NOTES FOR FAN PERFORMANCE DATA TABLES confidence. Using fan motors up to the watts or bhp rating shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. 5. Use of a field-supplied motor may affect wire size. Contact your Carrier representative for details. 1. Static pressure losses (i.e., economizer) must be added to external static pressure before entering Fan Performance table. 2. Interpolation is permissible. Do not extrapolate. 3. Fan performance is based on wet coils, clean filters, and casing losses. See Table 23 for accessory/FIOP static pressure information. 4. Extensive motor and drive testing on these units ensures that the full horsepower and watts range of the motor can be utilized with 39 Table 22 — Air Quantity Limits UNIT 48TM MINIMUM COOLING CFM 016 020 025 028 4500 5400 6000 7000 MINIMUM HEATING CFM Low Heat High Heat 3800 3800 4750 5450 4750 5450 4750 5450 MAXIMUM CFM 7,500 9,000 10,000 11,250 Table 23 — Accessory/FIOP Static Pressure (in. wg)* — 48TM016-028 COMPONENT 4500 0.040 0.045 EconoMi$erIV and EconoMi$er2 MoistureMi$er™ Dehumidification FIOP — 5000 0.050 0.048 5400 0.060 0.060 6000 0.070 0.071 CFM 7200 0.090 0.103 7500 0.100 0.111 9000 0.110 0.160 10,000 0.120 0.197 11,250 0.140 0.250 LEGEND Factory-Installed Option *The static pressure must be added to external static pressure. The sum and the evaporator entering-air cfm should then be used in conjunction with the Fan Performance tables to determine blower rpm and watts. Table 24 — Fan Rpm at Pulley Settings* UNIT 48TM 016† 016** 020† 020** 025† 025** 028† 028** 0 1/2 1 11/2 2 †† †† †† †† †† †† †† †† †† †† †† †† †† †† †† †† †† †† 1095 1287 †† †† 1283 †† †† †† 1077 1265 †† †† 1269 †† 1021 1200 1058 1243 1151 1369 1247 1551 MOTOR PULLEY TURNS OPEN 21/2 3 31/2 1002 1178 1040 1222 1132 1347 1225 1524 984 1156 1021 1200 1114 1325 1203 1497 965 1134 1002 1178 1095 1303 1182 1470 4 41/2 5 51/2 6 947 1112 984 1156 1077 1281 1160 1443 928 1091 965 1134 1058 1259 1138 1415 910 1069 947 1112 1040 1237 1116 1388 891 1047 928 1091 1021 1215 1095 1361 873 1025 910 1069 1002 1193 1066 1332 *Approximate fan rpm shown. †Indicates standard drive package. **Indicates alternate drive package. ††Due to belt and pulley size, pulley cannot be set to this number of turns open. Table 25 — Evaporator-Fan Motor Data UNIT 48TM 016 020 025 028 BHP — BkW — UNIT VOLTAGE 208/230 460 575 208/230 460 575 208/230 460 575 208/230 460 575 MAXIMUM ACCEPTABLE CONTINUOUS BHP* MAXIMUM ACCEPTABLE CONTINUOUS BkW* MAXIMUM ACCEPTABLE OPERATING WATTS 6.13 4.57 5,180 5.90 4.40 5,180 8.70 9.50 8.70 10.20 11.80 10.20 6.49 7.08 6.49 7.61 8.80 7.61 7,915 8,640 7,915 9,510 11,000 9,510 LEGEND Brake Horsepower Brake Kilowatts MAXIMUM AMP DRAW 15.8 7.9 6.0 15.8 7.9 6.0 22.0 13.0 10.0 28.0 14.6 13.0 Table 26 — Evaporator-Fan Motor Efficiency *Extensive motor and electrical testing on these units ensures that the full horsepower (brake kilowatt) range of the motors can be utilized with confidence. Using fan motors up to the horsepower (brake kilowatt) ratings shown in this table will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. NOTE: All indoor-fan motors 5 hp and larger meet the minimum efficiency requirements as established by the Energy Policy Act of 1992 (EPACT) effective October 24, 1997. UNIT 48TM 5 Hp 7.5 Hp 10 Hp MOTOR EFFICIENCY (%) 87.5 88.5 89.5 NOTE: All indoor-fan motors 5 hp and larger meet the minimum efficiency requirements as established by the Energy Policy Act of 1992 (EPACT) effective October 24, 1997. 40 Operating Sequence the dampers open to maintain the supply air temperature set point at 50 to 55 F. As the supply air temperature drops below the set point range of 50 to 55 F, the control will modulate the outdoor-air dampers closed to maintain the proper supply-air temperature. HEATING, UNITS WITH ECONOMI$ERIV — When the room thermostat calls for heat, the heating controls are energized as described in the Heating, Units Without Economizer section. When the indoor fan is energized, the economizer damper moves to the minimum position. When the indoor fan is off, the economizer damper is fully closed. COOLING, UNITS WITH ECONOMI$ER2, PREMIERLINK™ CONTROL AND A THERMOSTAT — When free cooling is not available, the compressors will be controlled by the PremierLink control in response to the Y1 and Y2 inputs from the thermostat. The PremierLink control will use the following information to determine if free cooling is available: • Indoor fan has been on for at least 30 seconds. • The SPT, SAT, and OAT inputs must have valid readings. • OAT must be less than 75 F. • OAT must be less than SPT. • Enthalpy must be LOW (may be jumpered if an enthalpy sensor not available). • Economizer position is NOT forced. Pre-cooling occurs when the is no call from the thermostat except G. Pre-cooling is defined as the economizer modulates to provide 70 F supply air. When free cooling is available the PremierLink control will control the compressors and economizer to provide a supplyair temperature determined to meet the Y1 and Y2 calls from the thermostat using the following three routines. The three control routines are based on OAT. The 3 routines are based on OAT where: SASP = Supply Air Set Point DXCTLO = Direct Expansion Cooling Lockout Set Point PID = Proportional Integral Routine 1 (OAT < DXCTLO) • Y1 energized – economizer maintains a SASP = (SATLO1 + 3). • Y2 energized – economizer maintains a SASP = (SATLO2 + 3). Routine 2 (DXCTLO < OAT < 68 F) • If only Y1 energized, the economizer maintains a SASP = (SATLO1 + 3). • If SAT > SASP + 5 and economizer position > 80%, economizer will go to minimum position for 3 minutes or until SAT > 68 F. • First stage of mechanical cooling will be energized. • Integrator resets. • Economizer opens again and controls to current SASP after stage one on for 90 seconds. • With Y1 and Y2 energized economizer maintains an SASP = SATLO2 + 3. • If SAT > SASP + 5 and economizer position >80%, economizer will go to minimum position for 3 minutes or until SAT > 68 F. • If compressor one is on then second stage of mechanical cooling will be energized. Otherwise the first stage will be energized. • Integrator resets. • Economizer opens again and controls to SASP after stage one on for 90 seconds. COOLING, UNITS WITHOUT ECONOMIZER — When thermostat calls for cooling, terminals G and Y1 are energized. The indoor (evaporator) fan contactor (IFC), compressor contactor no. 1 (C1) and outdoor-fan contactor (OFC) are energized, and evaporator-fan motor, compressor no. 1, and both condenser fans start. The condenser-fan motors run continuously while unit is cooling. If the thermostat calls for a second stage of cooling by energizing Y2, compressor contactor no. 2 (C2) is energized and compressor no. 2 starts. When the thermostat is satisfied, C1 and C2 are deenergized and the compressors and outdoor (condenser) fan motors (OFM) shut off. After a 30-second delay, the indoor (evaporator) fan motor (IFM) shuts off. If the thermostat fan selector switch is in the ON position, the evaporator-fan motor will run continuously. HEATING, UNITS WITHOUT ECONOMIZER — When the thermostat calls for heating, terminal W1 is energized. In order to prevent thermostat short-cycling, the unit is locked into the Heating mode for at least 1 minute when W1 is energized. The induced-draft motor (IDM) is then energized and the burner ignition sequence begins. The indoor (evaporator) fan motor (IFM) is energized 45 seconds after a flame is ignited. On units equipped for two stages of heat, when additional heat is needed, W2 is energized and the high-fire solenoid on the main gas valve (MGV) is energized. When the thermostat is satisfied and W1 and W2 are deenergized, the IFM stops after a 45-second time-off delay. COOLING, UNITS WITH ECONOMI$ERIV — When free cooling is not available, the compressors will be controlled by the zone thermostat. When free cooling is available, the outdoor-air damper is modulated by the EconoMi$erIV control to provide a 50 to 55 F supply-air temperature into the zone. As the supply-air temperature fluctuates above 55 or below 50 F, the dampers will be modulated (open or close) to bring the supply-air temperature back within the set point limits. For EconoMi$erIV operation, there must be a thermostat call for the fan (G). This will move the damper to its minimum position during the occupied mode. Above 50 F supply-air temperature, the dampers will modulate from 100% open to the minimum open position. From 50 F to 45 F supply-air temperature, the dampers will maintain at the minimum open position. Below 45 F the dampers will be completely shut. As the supply-air temperature rises, the dampers will come back open to the minimum open position once the supply-air temperature rises to 48 F. If optional power exhaust is installed, as the outdoor-air damper opens and closes, the power exhaust fans will be energized and deenergized. If field-installed accessory CO2 sensors are connected to the EconoMi$er IV control, a demand controlled ventilation strategy will begin to operate. As the CO2 level in the zone increases above the CO2 set point, the minimum position of the damper will be increased proportionally. As the CO2 level decreases because of the increase in fresh air, the outdoor-air damper will be proportionally closed. Damper position will follow the higher demand condition from DCV mode or free cooling mode. Damper movement from full closed to full open (or vice versa) will take between 11/2 and 21/2 minutes. If free cooling can be used as determined from the appropriate changeover command (switch, dry bulb, enthalpy curve, differential dry bulb, or differential enthalpy), a call for cooling (Y1 closes at the thermostat) will cause the control to modulate 41 below the cooling set point, allowing for a smooth transition from mechanical cooling with economizer assist, back to economizer cooling as the cooling set point is achieved. The compressors may be used for initial cooling then the PremierLink controller will modulate the economizer using an error reduction calculation to hold the space temperature between the heating and cooling set points. See Fig. 48. The controller uses the following conditions to determine economizer cooling: • Enthalpy is Low • SAT reading is available • OAT reading is available • SPT reading is available • OAT ≤ SPT • Economizer Position is NOT forced If any of the above conditions are not met, the economizer submaster reference (ECSR) is set to maximum limit and the damper moves to minimum position. The operating sequence is complete. The ECSR is recalculated every 30 seconds. If an optional power exhaust is installed, as the outdoor-air damper opens and closes, the power exhaust fans will be energized and deenergized. If field-installed accessory CO2 sensors are connected to the PremierLink control, a PID-controlled demand ventilation strategy will begin to operate. As the CO2 level in the zone increases above the CO2 set point, the minimum position of the damper will be increased proportionally. As the CO2 level decreases because of the increase in fresh air, the outdoor-air damper will be proportionally closed. Routine 3 (OAT > 68) • Economizer is opened 100%. • Compressors 1 and 2 are cycled based on Y1 and Y2 using minimum on and off times and watching the supply air temperature as compared to SATLO1 and SATLO2 set points. If optional power exhaust is installed, as the outdoor-air damper opens and closes, the power exhaust fans will be energized and deenergized. If field-installed accessory CO2 sensors are connected to the PremierLink™ control, a PID-controlled demand ventilation strategy will begin to operate. As the CO2 level in the zone increases above the CO2 set point, the minimum position of the damper will be increased proportionally. As the CO2 level decreases because of the increase in fresh air, the outdoor-air damper will be proportionally closed. HEATING, UNITS WITH ECONOMI$ER2, PREMIERLINK CONTROL AND A THERMOSTAT — When the thermostat calls for heating, terminal W1 is energized. The PremierLink control will move the economizer damper to the minimum position if there is a call for G and closed if there is a call for W1 without G. In order to prevent thermostat from short cycling, the unit is locked into the heating mode for at least 10 minutes when W1 is energized. The induced-draft motor is then energized and the burner ignition sequence begins. On units equipped for two stages of heat, when additional heat is needed, W2 is energized and the high-fire solenoid on the main gas valve (MGV) is energized. When the thermostat is satisfied and W1 is deenergized, the IFM stops after a 45-second time-off delay unless G is still maintained. COOLING, UNITS WITH ECONOMI$ER2, PREMIERLINK CONTROL AND A ROOM SENSOR — When free cooling is not available, the compressors will be controlled by the PremierLink controller using a PID Error reduction calculation as indicated by Fig 47. The PremierLink controller will use the following information to determine if free cooling is available: • Indoor fan has been on for at least 30 seconds. • The SPT, SAT, and OAT inputs must have valid readings. • OAT must be less than 75 F. • OAT must be less than SPT. • Enthalpy must be LOW (may be jumpered if and enthalpy sensor is not available). • Economizer position is NOT forced. When free cooling is available, the outdoor-air damper is positioned through the use of a Proportional Integral (PID) control process to provide a calculated supply-air temperature into the zone. The supply air will maintain the space temperature between the heating and cooling set points as indicated in Fig. 48. The PremierLink will integrate the compressors stages with the economizer based on similar logic as the three routines listed in the previous section. The SASP will float up and down based on the error reduction calculations that compare space temperature and space set point. When outdoor-air temperature conditions require the economizer to close for a compressor stage-up sequence, the economizer control integrator is reset to zero after the stage-up sequence is completed. This prevents the supply-air temperature from dropping too quickly and creating a freeze condition that would make the compressor turn off prematurely. The high space set point is used for DX (direct expansion) cooling control, while the economizer space set point is a calculated value between the heating and cooling set points. The economizer set point will always be at least one degree SPACE TEMPERATURE TEMPERATURE CONTROL 75 74 73 72 SET POINT TEMPERATURE 71 70 69 68 TIME NOTE: PremierLink control performs smart staging of 2 stages of DX cooling and up to 3 stages of heat. Fig. 47 — DX Cooling Temperature Control Example SPACE TEMPERATURE TEMPERATURE CONTROL 75 74 73 72 COOL SETPOINT TEMPERATURE HEAT SETPOINT 71 70 69 68 TIME Fig. 48 — Economizer Temperature Control Example 42 HEATING, UNIT WITH ECONOMI$ER2, PREMIERLINK CONTROL AND A ROOM SENSOR — Every 40 seconds the controller will calculate the required heat stages (maximum of 3) to maintain supply air temperature (SAT) if the following qualifying conditions are met: • Indoor fan has been on for at least 30 seconds. • COOL mode is not active. • OCCUPIED, TEMP.COMPENSATED START or HEAT mode is active. • SAT reading is available. • Fire shutdown mode is not active. If all of the above conditions are met, the number of heat stages is calculated; otherwise the required number of heat stages will be set to 0. If the PremierLink controller determines that heat stages are required, the economizer damper will be moved to minimum position if occupied and closed if unoccupied. Staging should be as follows: If Heating PID STAGES=2 • HEAT STAGES=1 (75% capacity) will energize HS1 • HEAT STAGES=2 (100% capacity) will energize HS2 In order to prevent short cycling, the unit is locked into the Heating mode for at least 10 minutes when HS1 is deenergized. When HS1 is energized the induced-draft motor is then energized and the burner ignition sequence begins. On units equipped for two stages of heat, when additional heat is needed, HS2 is energized and the high-fire solenoid on the main gas valve (MGV) is energized. When the space condition is satisfied and HS1 is deenergized the IFM stops after a 45-second time-off delay unless in the occupied mode. The fan will run continuously in the occupied mode as required by national energy and fresh air standards. CERAMIC BAFFLE CLIP HEAT EXCHANGER TUBES NOTE: One baffle and clip will be in each upper tube of the heat exchanger. Fig. 49 — Removing Heat Exchanger Ceramic Baffles and Clips To inspect blower wheel, remove heat exchanger access panel. Shine a flashlight into opening to inspect wheel. If cleaning is required, remove motor and wheel assembly by removing screws holding motor mounting plate to top of combustion fan housing. The motor and wheel assembly will slide up and out of the fan housing. Remove the blower wheel from the motor shaft and clean with a detergent or solvent. Replace motor and wheel assembly. EVAPORATOR COIL — Clean as required with a commercial coil cleaner. CONDENSER COIL — Clean condenser coil annually and as required by location and outdoor-air conditions. Inspect coil monthly — clean as required. CONDENSATE DRAIN — Check and clean each year at start of cooling season. In winter, keep drains and traps dry. FILTERS — Clean or replace at start of each heating and cooling season, or more often if operating conditions require. Refer to Table 1 for type and size. NOTE: The 48TM028 unit requires industrial grade throwaway filters capable of withstanding face velocities up to 625 fpm. Ensure that replacement filters for the 48TM028 units are rated for 625 fpm. OUTDOOR-AIR INLET SCREENS — Clean screens with steam or hot water and a mild detergent. Do not use throwaway filters in place of screens. SERVICE Before performing service or maintenance operations on unit, turn off main power switch to unit. Electrical shock could cause personal injury. Cleaning — Inspect unit interior at beginning of each heating and cooling season and as operating conditions require. Remove unit top panel and/or side panels for access to unit interior. MAIN BURNER — At the beginning of each heating season, inspect for deterioration or blockage due to corrosion or other causes. Observe the main burner flames. Refer to Main Burners section on page 46. FLUE GAS PASSAGEWAYS — The flue collector box and heat exchanger cells may be inspected by removing heat exchanger access panel (Fig. 4-6), flue box cover, and main burner assembly. Refer to Main Burners section on page 46 for burner removal sequence. If cleaning is required, remove heat exchanger baffles and clean tubes with a wire brush. Use caution with ceramic heat exchanger baffles. When installing retaining clip, be sure the center leg of the clip extends inward toward baffle. See Fig. 49. COMBUSTION-AIR BLOWER — Clean periodically to assure proper airflow and heating efficiency. Inspect blower wheel every fall and periodically during heating season. For the first heating season, inspect blower wheel bi-monthly to determine proper cleaning frequency. Lubrication COMPRESSORS — Each compressor is charged with the correct amount of oil at the factory. Conventional white oil (Sontext 200LT) is used. White oil is compatible with 3GS oil, and 3GS oil may be used if the addition of oil is required. See compressor nameplate for original oil charge. A complete recharge should be four ounces less than the original oil charge. When a compressor is exchanged in the field it is possible that a major portion of the oil from the replaced compressor may still be in the system. While this will not affect the reliability of the replacement compressor, the extra oil will add rotor drag and increase power usage. To remove this excess oil, an access valve may be added to the lower portion of the suction line at the inlet of the compressor. The compressor should then be run for 10 minutes, shut down, and the access valve opened until no oil flows. This should be repeated twice to make sure the proper oil level has been achieved. 43 FAN SHAFT BEARINGS — Lubricate bearings at least every 6 months with suitable bearing grease. Extended grease line is provided for far side fan bearing (opposite drive side). Typical lubricants are given below: MANUFACTURER Texaco Mobil Sunoco Texaco 6. Replace and tighten belts. See Belt Tension Adjustment section on page 45. To align fan and motor pulleys: 1. Loosen fan pulley setscrews. 2. Slide fan pulley along fan shaft. 3. Make angular alignment by loosening motor from mounting plate. LUBRICANT Regal AFB-2* Mobilplex EP No. 1 Prestige 42 Multifak 2 Evaporator Fan Service and Replacement — The 48TM units use a fan motor mounting system that features a slide-out motor mounting plate. See Fig. 51. To replace or service the motor, slide out the bracket. 1. Remove the evaporator-fan access panel and the heating control access panel. 2. Remove the center post (located between the evaporator fan and heating control access panels) and all screws securing it. 3. Loosen nuts on the 2 carriage bolts in the motor mounting base. 4. Using jacking bolt under motor base, raise motor to top of slide and remove belt. Secure motor in this position by tightening the nuts on the carriage bolts. 5. Remove the belt drive. 6. Remove jacking bolt and tapped jacking bolt plate. 7. Remove the 2 screws that secure the motor mounting plate to the motor support channel. 8. Remove the 3 screws from the end of the motor support channel that interfere with the motor slide path. 9. Slide out the motor and motor mounting plate. 10. Disconnect wiring connections and remove the 4 mounting bolts. 11. Remove the motor. 12. To install the new motor, reverse Steps 1-11. *Preferred lubricant because it contains rust and oxidation inhibitors. CONDENSER AND EVAPORATOR-FAN MOTOR BEARINGS — The condenser-fan and evaporator-fan motors have permanently sealed bearings, so no field lubrication is necessary. Evaporator Fan Performance Adjustment (Fig. 50 and 51) — Fan motor pulleys are factory set for speed shown in Table 1. To change fan speeds: 1. Shut off unit power supply. 2. Loosen nuts on the 2 carriage bolts in the motor mounting base. Install jacking bolt and plate under motor base (bolt and plate are shipped in installer’s packet). Using bolt and plate, raise motor to top of slide and remove belt. Secure motor in this position by tightening the nuts on the carriage bolts. 3. Loosen movable-pulley flange setscrew (see Fig. 50). 4. Screw movable flange toward fixed flange to increase speed and away from fixed flange to decrease speed. Increasing fan speed increases load on motor. Do not exceed maximum speed specified in Table 1. See Table 22 for air quantity limits. 5. Set movable flange at nearest keyway of pulley hub and tighten setscrew. (See Table 1 for speed change for each full turn of pulley flange.) NOTE: A 31/2-in. bolt and threaded plate are included in the installer’s packet. They should be added to the motor support channel below the motor mounting plate to aid in raising the motor. The plate part number is 50DP503842. The adjustment bolt is 3/8-16 x 13/4 in. LG. Fig. 51 — Evaporator-Fan Motor Section Fig. 50 — Evaporator-Fan Pulley and Adjustment 44 Belt Tension Adjustment — To adjust belt tension: Refrigerant Charge — Amount of refrigerant charge is listed on unit nameplate and in Table 1. Refer to Carrier GTAC II; Module 5; Charging, Recovery, Recycling, and Reclamation section for charging methods and procedures. Unit panels must be in place when unit is operating during charging procedure. NOTE: Do not use recycled refrigerant as it may contain contaminants. NO CHARGE — Use standard evacuating techniques. After evacuating system, weigh in the specified amount of refrigerant (refer to Table 1). LOW CHARGE COOLING — Using cooling charging chart (see Fig. 54), add or remove refrigerant until conditions of the chart are met. Note that charging chart is different from those normally used. An accurate pressure gage and temperaturesensing device is required. Charging is accomplished by ensuring the proper amount of liquid subcooling. Measure liquid line pressure at the liquid line service valve using pressure gage. Connect temperature sensing device to the liquid line near the liquid line service valve and insulate it so that outdoor ambient temperature does not affect reading. TO USE THE COOLING CHARGING CHART — Use the above temperature and pressure readings, and find the intersection point on the cooling charging chart. If intersection point on chart is above line, add refrigerant. If intersection point on chart is below line, carefully recover some of the charge. Recheck suction pressure as charge is adjusted. NOTE: Indoor-air cfm must be within normal operating range of unit. All outdoor fans must be operating. The TXV (thermostatic expansion valve) is set to maintain between 15 and 20 degrees of superheat at the compressors. The valves are factory set and should not require re-adjustment. MOISTUREMI$ER™ SYSTEM CHARGING — The system charge for units with the MoistureMi$er option is greater than that of the standard unit alone. The charge for units with this option is indicated on the unit nameplate drawing. To charge systems using the MoistureMi$er dehumidification package, fully evacuate, recover, and re-charge the system to the nameplate specified charge level. To check or adjust refrigerant charge on systems using the MoistureMi$er dehumidification package, charge per the standard subcooling charts. The subcooler MUST be deenergized to use the charging charts. The charts reference a liquid pressure (psig) and temperature at a point between the condenser coil and the subcooler coil. A tap is provided on the unit to measure liquid pressure entering the subcooler (leaving the condenser). 1. Loosen fan motor bolts. 2. Turn motor jacking bolt to move motor mounting plate up or down for proper belt tension (3/8 in. deflection at midspan with one finger [9 lb force]). 3. Tighten nuts. 4. Adjust bolts and nut on mounting plate to secure motor in fixed position. Condenser-Fan Adjustment 48TM016,020,028 UNITS (Fig. 52) 1. Shut off unit power supply. 2. Remove access panel(s) closest to the fan to be adjusted. 3. Loosen fan hub setscrews. 4. Adjust fan height on shaft using a straightedge placed across the fan orifice. 5. Tighten setscrews and replace panel(s). 6. Turn on unit power. 48TM025 UNITS (Fig. 53) 1. Shut off unit power supply. 2. Remove fan top-grille assembly and loosen fan hub screws. 3. Adjust fan height on unit, using a straightedge placed across the fan orifice. 4. Tighten setscrews and replace rubber hubcap to prevent hub from rusting to motor shaft. 5. Fill hub recess with permagum if rubber hubcap is missing. Power Failure — Dampers have a spring return. In event of power failure, dampers will return to fully closed position until power is restored. Do not manually operate economizer motor. NOTE: Dimensions are in inches. BOTH CIRCUITS ALL OUTDOOR FANS MUST BE OPERATING LIQUID TEMPERATURE AT LIQUID VALVE (DEG F) Fig. 52 — Condenser Fan Adjustment, 48TM016,020,028 NOTE: Dimensions are in inches. Fig. 53 — Condenser-Fan Adjustment, 48TM025 140 120 ADD CHARGE IF ABOVE CURVE 100 80 REDUCE CHARGE IF BELOW CURVE 60 40 50 150 100 200 250 350 300 LIQUID PRESSURE AT LIQUID VALVE (PSIG) Fig. 54 — Cooling Charging Chart 45 400 Gas Valve Adjustment CLEANING AND ADJUSTMENT 1. Remove burner rack from unit as described in Main Burner Removal section above. 2. Inspect burners, and if dirty, remove burners from rack. 3. Using a soft brush, clean burners and crossover port as required. 4. Adjust spark gap. See Fig. 56. 5. Reinstall burners on rack. 6. Reinstall burner rack as described above. NATURAL GAS — The gas valve opens and closes in response to the thermostat or limit control. When power is supplied to valve terminals D1 and C2, the main valve opens to its preset position. The regular factory setting is stamped on the valve body (3.3 in. wg). To adjust regulator: 1. Set thermostat at setting for no call for heat. 2. Turn main gas valve to OFF position. 3. Remove 1/8-in. pipe plug from manifold or gas valve pressure tap connection. Install a suitable pressuremeasuring device. 4. Set main gas valve to ON position. 5. Set thermostat at setting to call for heat. 6. Remove screw cap covering regulator adjustment screw (See Fig. 55). 7. Turn adjustment screw clockwise to increase pressure or counterclockwise to decrease pressure. 8. Once desired pressure is established, set thermostat setting for no call for heat, turn off main gas valve, remove pressure-measuring device, and replace 1/8-in. pipe plug and screw cap. Filter Drier — Replace whenever refrigerant system is exposed to atmosphere. Protective Devices COMPRESSOR PROTECTION Overcurrent — Each compressor has internal line break motor protection. Crankcase Heater — All units are equipped with a 70-watt crankcase heater to prevent absorption of liquid refrigerant by oil in the crankcase when the compressor is idle. The crankcase heater is energized whenever there is a main power to the unit and the compressor is not energized. IMPORTANT: After a prolonged shutdown or servicing, energize the crankcase heaters for 24 hours before starting the compressors. REGULATOR ADJUSTMENT SCREW (REMOVE COVER) 2 LEADS, #18 WIRE 1/32 INSULATION, 600V. MAX., 105°C Compressor Lockout — If any of the safeties (high-pressure, low-pressure, freeze protection thermostat, compressor internal thermostat) trip, or if there is loss of power to the compressors, the cooling lockout (CLO) will lock the compressors off. To reset, manually move the thermostat setting. EVAPORATOR-FAN MOTOR PROTECTION — A manual reset, calibrated trip, magnetic circuit breaker protects against overcurrent. Do not bypass connections or increase the size of the breaker to correct trouble. Determine the cause and correct it before resetting the breaker. CONDENSER-FAN MOTOR PROTECTION — Each condenser-fan motor is internally protected against overtemperature. HIGH-PRESSURE AND LOW-PRESSURE SWITCHES — If either switch trips, or if the compressor overtemperature switch activates, that refrigerant circuit will be automatically locked out by the CLO. To reset, manually move the thermostat setting. FREEZE PROTECTION THERMOSTAT (FPT) — An FPT is located on the top and bottom of the evaporator coil. They detect frost build-up and turn off the compressor, allowing the coil to clear. Once the frost has melted, the compressor can be reenergized by resetting the compressor lockout. OUTLET PRESSURE TAP (PLUGGED) 1/8-27 N.P.T. THDS. C1 OFF ON C2 PILOT ADJ. INLET PRESSURE TAP (PLUGGED) 1/8 - 27 N.P.T. THDS. RECEPTACLE AND TAB COMBINATION TERMINAL D-1 D-2 W-1 W-2 PILOT CONNECTION FOR 1/4” O.D. TUBING (PLUGGED) RECEPTACLE TERMINAL Fig. 55 — Gas Valve Main Burners — For all applications, main burners are factory set and should require no adjustment. MAIN BURNER REMOVAL 1. Shut off (field-supplied) manual main gas valve. 2. Shut off power to unit. 3. Remove unit control box access panel, burner section access panel, and center post (Fig. 4-6). 4. Disconnect gas piping from gas valve inlet. 5. Remove wires from gas valve. 6. Remove wires from rollout switch. 7. Remove sensor wire and ignitor cable from IGC board. 8. Remove 2 screws securing manifold bracket to basepan. 9. Remove 2 screws that hold the burner support plate flange to the vestibule plate. 10. Lift burner assembly out of unit. Relief Devices — All units have relief devices to protect against damage from excessive pressures (i.e., fire). These devices protect the high and low side. Control Circuit, 24-V — This control circuit is protected against overcurrent by a 3.2 amp circuit breaker. Breaker can be reset. If it trips, determine cause of trouble before resetting. See Fig. 57 and 58 for typical wiring diagrams. Replacement Parts — A complete list of replacement parts may be obtained from any Carrier distributor upon request. 46 Diagnostic IGC Control LEDs — The IGC board has LEDs for diagnostic purposes. Refer to Troubleshooting section on page 51. control box access door is interlocked with the non-fused disconnect which must be in the OFF position to open the door. Two doors are provided on 48TM016-025 units for access to the compressor compartment. Two internal access doors are provided inside the filter/ drive access door. The filter access door (on the left) is secured by 2 small 1/4 turn latches with folding bail-type handles. This door must be opened prior to opening the drive access door. The drive access door is shipped with 2 sheet metal screws holding the door closed. Upon initial opening of the door, these screws may be removed and discarded. The door is then held shut by the filter access door, which closes over it. Optional Hinged Access Doors — When the optional service package is ordered or the if the hinged access doors option is ordered, the unit will be provided with external and internal hinged access doors to facilitate service. Four external hinged access doors are provided on size 016-025 units. Two external hinged doors are provided on size 028 units. All external doors are provided with 2 large 1/4 turn latches with folding bail-type handles. (Compressor access doors have one latch.) A single door is provided for filter and drive access. One door is provided for control box access. The SEE DETAIL "C" 48TMD016 SEE DETAIL "C" 48TMD020-028 AND 48TMF016 SEE DETAIL "C" 48TMF020-028 Fig. 56 — Spark Gap Adjustment 47 Fig. 57 — Typical Wiring Schematic (48TM016,020 — 208/230 V Shown) 48 Fig. 58 — Typical Component Arrangement 49 LEGEND AND NOTES FOR FIG. 57 AND 58 LEGEND AHA C CAP CB CC CH CLO COMP CR DM DU EQUIP FPT FU GND HPS HS HV I IAQ IDM IFC IFCB IFM IGC L — — — — — — — — — — — — — — — — — — — — — — — — — — Adjustable Heat Anticipator Contactor, Compressor Capacitor Circuit Breaker Cooling Compensator Crankcase Heater Compressor Lockout Compressor Motor Control Relay Damper Motor Dummy Terminal Equipment Freeze Protection Thermostat Fuse Ground High-Pressure Switch Hall Effect Sensor High Voltage Ignitor Indoor Air Quality Sensor Induced-Draft Motor Indoor-Fan Contactor Indoor-Fan Circuit Breaker Indoor-Fan Motor Integrated Gas Unit Controller Light LED LOR LPS LS MGV NEC OAT OCCUP OFC OFM PL PRI QT RAT RS SN SR SW TB TC TH TRAN — — — — — — — — — — — — — — — — — — — — — — Light-Emitting Diode Lockout Relay Low-Pressure Switch Limit Switch Main Gas Valve National Electrical Code Outdoor Air Temperature Sensor Occupancy Sensor Outdoor-Fan Contactor Outdoor-Fan Motor Plug Assembly Primary Quadruple Terminal Return Air Temperature Sensor Rollout Switch Sensor Solenoid Relay Switch Terminal Block Thermostat Cooling Thermostat Heating Transformer Terminal Block Splice Factory Wiring Field Control Wiring Option/Accessory Wiring To indicate common potential only; not to represent wiring. Economizer Motor Remote POT Field Accessory OAT Sensor Disch Air Sensor RAT Accessory Sensor Terminal (Marked) Low Ambient Lockout Switch Terminal (Unmarked) NOTES: 1. Compressor and/or fan motor(s) thermally protected. Three-phase motors protected against primary single phasing conditions. 2. If any of the original wire furnished must be replaced, it must be replaced with Type 90° C or its equivalent. 3. Jumpers are omitted when unit is equipped with economizer. 4. IFCB must trip amps is equal to or less than 140% FLA. 5. On TRAN1 use BLK lead for 460-v power supply and ORN lead for 575-v power supply. 6. The CLO locks out the compressor to prevent short cycling on compressor overload and safety devices; before replacing CLO check these devices. 7. Number(s) indicates the line location of used contacts. A bracket over (2) numbers signifies a single pole, double throw contact. An underlined number signifies a normally closed contact. Plain (no line) number signifies a normally open contact. 8. 620 Ohm, 1 watt, 5% resistor should be removed only when using differential enthalpy or dry bulb. 9. If a separate field supplied 24 v transformer is used for the IAQ sensor power supply, it cannot have the secondary of the transformer grounded. 10. OAT sensor is shipped inside unit and must be relocated in the field for proper operation. 11. For field installed remote minimum position POT. remove black wire jumper between P and P1 and set control minimum position POT to the minimum position. 50 TROUBLESHOOTING Unit Troubleshooting — Refer to Tables 27-29 and 2. Ensure terminals AQ and AQ1 are open. The LED for both DCV and Exhaust should be off. The actuator should be fully closed. 3. Connect a 9-v battery to AQ (positive node) and AQ1 (negative node). The LED for both DCV and Exhaust should turn on. The actuator should drive to between 90 and 95% open. 4. Turn the Exhaust potentiometer CW until the Exhaust LED turns off. The LED should turn off when the potentiometer is approximately 90%. The actuator should remain in position. 5. Turn the DCV set point potentiometer CW until the DCV LED turns off. The DCV LED should turn off when the potentiometer is approximately 9 v. The actuator should drive fully closed. 6. Turn the DCV and Exhaust potentiometers CCW until the Exhaust LED turns on. The exhaust contacts will close 30 to 120 seconds after the Exhaust LED turns on. 7. Return EconoMi$erIV settings and wiring to normal after completing troubleshooting. DCV MINIMUM AND MAXIMUM POSITION — To check the DCV minimum and maximum position: 1. Make sure EconoMi$erIV preparation procedure has been performed. 2. Connect a 9-v battery to AQ (positive node) and AQ1 (negative node). The DCV LED should turn on. The actuator should drive to between 90 and 95% open. 3. Turn the DCV Maximum Position potentiometer to midpoint. The actuator should drive to between 20 and 80% open. 4. Turn the DCV Maximum Position potentiometer to fully CCW. The actuator should drive fully closed. 5. Turn the Minimum Position potentiometer to midpoint. The actuator should drive to between 20 and 80% open. 6. Turn the Minimum Position Potentiometer fully CW. The actuator should drive fully open. 7. Remove the jumper from TR and N. The actuator should drive fully closed. 8. Return EconoMi$erIV settings and wiring to normal after completing troubleshooting. SUPPLY-AIR INPUT — To check supply-air input: 1. Make sure EconoMi$erIV preparation procedure has been performed. 2. Set the Enthalpy potentiometer to A. The Free Cool LED turns on. The actuator should drive to between 20 and 80% open. 3. Remove the 5.6 kilo-ohm resistor and jumper T to T1. The actuator should drive fully open. 4. Remove the jumper across T and T1. The actuator should drive fully closed. 5. Return EconoMi$erIV settings and wiring to normal after completing troubleshooting. ECONOMI$ERIV TROUBLESHOOTING COMPLETION — This procedure is used to return the EconoMi$erIV to operation. No troubleshooting or testing is done by performing the following procedure. 1. Disconnect power at TR and TR1. 2. Set enthalpy potentiometer to previous setting. 3. Set DCV maximum position potentiometer to previous setting. 4. Set minimum position, DCV set point, and exhaust potentiometers to previous settings. 5. Remove 620-ohm resistor from terminals SR and +. 6. Remove 1.2 kilo-ohm checkout resistor from terminals SO and +. If used, reconnect sensor from terminals SO and +. Fig. 59. EconoMi$erIV Troubleshooting — See Table 30 for EconoMi$er IV logic. A functional view of the EconoMi$erIV is shown in Fig. 60. Typical settings, sensor ranges, and jumper positions are also shown. An EconoMi$erIV simulator program is available from Carrier to help with EconoMi$erIV training and troubleshooting. ECONOMI$ERIV PREPARATION — This procedure is used to prepare the EconoMi$erIV for troubleshooting. No troubleshooting or testing is done by performing the following procedure. NOTE: This procedure requires a 9-v battery, 1.2 kilo-ohm resistor, and a 5.6 kilo-ohm resistor which are not supplied with the EconoMi$erIV. IMPORTANT: Be sure to record the positions of all potentiometers before starting troubleshooting. 1. Disconnect power at TR and TR1. All LEDs should be off. Exhaust fan contacts should be open. 2. Disconnect device at P and P1. 3. Jumper P to P1. 4. Disconnect wires at T and T1. Place 5.6 kilo-ohm resistor across T and T1. 5. Jumper TR to 1. 6. Jumper TR to N. 7. If connected, remove sensor from terminals SO and +. Connect 1.2 kilo-ohm 4074EJM checkout resistor across terminals SO and +. 8. Put 620-ohm resistor across terminals SR and +. 9. Set minimum position, DCV set point, and exhaust potentiometers fully CCW (counterclockwise). 10. Set DCV maximum position potentiometer fully CW (clockwise). 11. Set enthalpy potentiometer to D. 12. Apply power (24 vac) to terminals TR and TR1. DIFFERENTIAL ENTHALPY — To check differential enthalpy: 1. Make sure EconoMi$erIV preparation procedure has been performed. 2. Place 620-ohm resistor across SO and +. 3. Place 1.2 kilo-ohm resistor across SR and +. The Free Cool LED should be lit. 4. Remove 620-ohm resistor across SO and +. The Free Cool LED should turn off. 5. Return EconoMi$erIV settings and wiring to normal after completing troubleshooting. SINGLE ENTHALPY — To check single enthalpy: 1. Make sure EconoMi$erIV preparation procedure has been performed. 2. Set the enthalpy potentiometer to A (fully CCW). The Free Cool LED should be lit. 3. Set the enthalpy potentiometer to D (fully CW). The Free Cool LED should turn off. 4. Return EconoMi$erIV settings and wiring to normal after completing troubleshooting. DCV (Demand Controlled Ventilation) AND POWER EXHAUST — To check DCV and Power Exhaust: 1. Make sure EconoMi$erIV preparation procedure has been performed. 51 10. Remove jumper from P to P1. Reconnect device at P and P1. 11. Apply power (24 vac) to terminals TR and TR1. 7. Remove jumper from TR to N. 8. Remove jumper from TR to 1. 9. Remove 5.6 kilo-ohm resistor from T and T1. Reconnect wires at T and T1. Table 27 — Cooling Service Analysis PROBLEM Compressor and Condenser Fan Will Not Start. Compressor Will Not Start but Condenser Fan Runs. Compressor Cycles (other than normally satisfying thermostat). Compressor Operates continuously. Excessive Head Pressure. Head Pressure Too Low. Excessive Suction Pressure. Suction Pressure Too Low. CAUSE Power failure. Fuse blown or circuit breaker tripped. Defective thermostat, contactor, transformer, or control relay. Insufficient line voltage. Incorrect or faulty wiring. Thermostat setting too high. Faulty wiring or loose connections in compressor circuit. Compressor motor burned out, seized, or internal overload open. Defective overload. Compressor locked out One leg of 3-phase power dead. Refrigerant overcharge or undercharge. Defective compressor. Insufficient line voltage. Blocked condenser. Defective overload. Defective thermostat. Faulty condenser-fan motor. Restriction in refrigerant system. Dirty air filter. Unit undersized for load. Thermostat set too low. Low refrigerant charge. Air in system. Condenser coil dirty or restricted. Dirty air filter. Dirty condenser coil. Refrigerant overcharged. Faulty TXV. Air in system. Condenser air restricted or air short-cycling. Low refrigerant charge. Restriction in liquid tube. High heat load. Faulty TXV. Refrigerant overcharged. Dirty air filter. Low refrigerant charge. Metering device or low side restricted. Faulty TXV. Insufficient evaporator airflow. Temperature too low in conditioned area. Field-installed filter drier restricted. LEGEND TXV — Thermostatic Expansion Valve 52 REMEDY Call power company. Replace fuse or reset circuit breaker. Replace component. Determine cause and correct. Check wiring diagram and rewire correctly. Lower thermostat setting below room temperature. Check wiring and repair or replace. Determine cause. Replace compressor. Determine cause and replace. Determine cause for safety trip and reset lockout. Replace fuse or reset circuit breaker. Determine cause. Recover refrigerant, evacuate system, and recharge to nameplate. Replace and determine cause. Determine cause and correct. Determine cause and correct. Determine cause and replace. Replace thermostat. Replace. Locate restriction and remove. Replace filter. Decrease load or increase unit size. Reset thermostat. Locate leak, repair, and recharge. Recover refrigerant, evacuate system, and recharge. Clean coil or remove restriction. Replace filter. Clean coil. Recover excess refrigerant. 1. Check TXV bulb mounting and secure tightly to suction line. 2. Replace TXV if stuck open or closed. Recover refrigerant, evacuate system, and recharge. Determine cause and correct. Check for leaks, repair, and recharge. Remove restriction. Check for source and eliminate. 1. Check TXV bulb mounting and secure tightly to suction line. 2. Replace TXV if stuck open or closed. Recover excess refrigerant. Replace filter. Check for leaks, repair, and recharge. Remove source of restriction. 1. Check TXV bulb mounting and secure tightly to suction line. 2. Replace TXV if stuck open or closed. Increase air quantity. Check filter and replace if necessary. Reset thermostat. Replace. Table 28 — Heating Service Analysis PROBLEM Burners Will Not Ignite. CAUSE Misaligned spark electrodes. No gas at main burners. Water in gas line. No power to furnace. No 24 v power supply to control circuit. Inadequate Heating. Miswired or loose connections. Burned-out heat anticipator in thermostat. Broken thermostat wires. Dirty air filter. Gas input to unit too low. Unit undersized for application. Restricted airflow. Blower speed too low. Limit switch cycles main burners. Too much outdoor air. Poor Flame Characteristics. Incomplete combustion (lack of combustion air) results in: Aldehyde odors, CO, sooting flame, or floating flame. Burners Will Not Turn Unit is locked into Heating mode for a one minute Off. minimum. REMEDY Check flame ignition and sensor electrode positioning. Adjust as needed. Check gas line for air; purge as necessary. After purging gas line of air, allow gas to dissipate for at least 5 minutes before attempting to relight unit. Check gas valve. Drain water and install drip leg to trap water. Check power supply, fuses, wiring, and circuit breaker. Check transformer. Transformers with internal overcurrent protection require a cool-down period before resetting. Check 24-v circuit breaker; reset if necessary. Check all wiring and wire nut connections. Replace thermostat. Run continuity check. Replace wires if necessary. Clean or replace filter as necessary. Check gas pressure at manifold. Clock gas meter for input. If too low, increase manifold pressure or replace with correct orifices. Replace with proper unit or add additional unit. Clean filter, replace filter, or remove any restrictions. Install alternate motor, if applicable, or adjust pulley to increase fan speed. Check rotation of blower, thermostat heat anticipator settings, and temperature rise of unit. Adjust as needed. Adjust minimum position. Check economizer operation. Check all screws around flue outlets and burner compartment. Tighten as necessary. Cracked heat exchanger. Overfired unit — reduce input, change orifices, or adjust gas line or manifold pressure. Check vent for restriction. Clean as necessary. Check orifice to burner alignment. Wait until mandatory one minute time period has elapsed or power to unit. LEGEND GR — Ground Table 29 — MoistureMi$er™ Dehumidification Subcooler Service Analysis PROBLEM Subcooler Will Not Energize CAUSE No power to subcooler control transformer. No power from subcooler control transformer to liquid line three-way valve. Liquid line three-way valve will not operate. Subcooler Will Not Deenergize Low System Capacity Liquid Line three-way valve will not close. Low refrigerant charge or frosted coil. 53 REMEDY Check power source. Ensure all wire connections are tight. 1. Fuse open; check fuse. Ensure continuity of wiring. 2. Subcooler control low-pressure switch open. Cycle unit off and allow low-pressure switch to reset. Replace switch if it will not close. 3. Transformer bad; check transformer. 1. Solenoid coil defective; replace. 2. Solenoid valve stuck closed; replace. Valve is stuck open; replace. 1. Check charge amount. See system charging section. 2. Evaporator coil frosted; check and replace subcooler control low-pressure switch if necessary. Table 30 — EconoMi$erIV Input/Output Logic Demand Control Ventilation (DCV) Below set (DCV LED Off) Above set (DCV LED On) INPUTS Enthalpy* Outdoor OUTPUTS N Terminal† Occupied Unoccupied Stage Stage 1 2 Damper On On Minimum position Closed On Off Off Off On Off Modulating** (between min. Modulating** (between position and full-open) closed and full-open) Off Off Off Off Minimum position Closed On On Modulating†† (between min. Modulating†† (between position and DCV maximum) closed and DCV On Off maximum) Off Off On Off Modulating*** Modulating††† Off Off Off Off Compressor Return High (Free Cooling LED Off) Low Low (Free Cooling LED On) High High (Free Cooling LED Off) Low Low (Free Cooling LED On) High Y1 Y2 On On Off On On Off On On Off On On Off On Off Off On Off Off On Off Off On Off Off *For single enthalpy control, the module compares outdoor enthalpy to the ABCD set point. †Power at N terminal determines Occupied/Unoccupied setting: 24 vac (Occupied), no power (Unoccupied). **Modulation is based on the supply air sensor signal. ††Modulation is based on the DCV signal. ***Modulation is based on the greater of DCV and supply-air sensor signals, between minimum position and either maximum position (DCV) or fully open (supply-air signal). †††Modulation is based on the greater of DCV and supply-air sensor signals, between closed and either maximum position (DCV) or fully open (supply-air signal). 54 LEGEND IGC — Integrated Gas Unit Controller NOTE: Thermostat Fan Switch in the “AUTO” position. Fig. 59 — IGC Control (Heating and Cooling) 55 Fig. 60 — EconoMi$erIV Functional View 56 INDEX Air quality limits 40 Altitude compensation 12 Burner section 12 Burner spark gap 47 Carrier Comfort Network® 19 Charging chart, refrigerant 45 Clearance 6-8 CO2 sensor Configuration 30 Settings 29, 30 Combustion blower wheel 43 Compressor Lockout 25, 46 Lubrication 43 Mounting 33 Rotation 33 Concentric duct 11 Condensate drain Cleaning 43 Location 11, 12 Condenser coil 9 Cleaning 43 Condenser fan 9 Adjustment 45 Control circuit 46 Wiring 13 Convenience outlet 14 Crankcase heater 33, 46 Demand control ventilation 28 Dehumidification 30 Dimensions 3, 4, 6-8 Ductwork 11 EconoMi$erIV 24-30 Control mode 27 Controller wiring 26 Damper movement 28 Demand ventilation control 28 Troubleshooting 51, 52, 54 Usage 27 Wiring 26 EconoMi$er2 24-26 Electrical connections 13 Electrical data 15 Enthalpy changeover set points 29 Error codes 47, 55 Evaporator coil 9 Cleaning 43 Evaporator fan motor Efficiency 40 Lubrication 44 Motor data 40 Performance 34-39 Pulley adjustment 44 Pulley setting 9, 40 Speed 9 Filter Cleaning 43 Size 10 Filter drier 46 Flue collector box 43 Flue gas passageways 43 Flue hood 11 Freeze protection thermostat 10, 46 Gas connection 10 Gas input 10 Gas piping 13, 33 Gas pressure 1, 10 Heat anticipator settings 10, 13 High-pressure switch 10, 46 Hinged access doors 47 Horizontal adapter roof curb 2 Humidistat 31 Indoor air quality sensor 19 Integrated gas controller Error codes 55 Liquid propane 10, 12 Low-pressure switch 10, 46 Main burners 43, 46 Manual outdoor air damper 16 MoistureMi$er dehumidification package 31, 32, 45, 53 MotorMaster® I control 17 Motormaster V control 18 Mounting Compressor 33 Unit 2 Natural gas 10 Non-fused disconnect 14 Operating limits 18 Operating sequence 41-43 Cooling 41-43 EconoMi$erIV 41 EconoMi$er2 with PremierLink control 41-43 Heating 41-43 Outdoor air hood 16 Outdoor air temperature sensor 19, 25 Outdoor air inlet screens Cleaning 43 Dimensions 10 Physical data 9, 10 Power supply 13 Wiring 13 PremierLink controls 19-22 Pressure, drop EconoMi$erIV 40 MoistureMi$er 40 Pressure switches High pressure 10 Low pressure 10 Refrigerant Charge 45 Type 9 Refrigerant service ports 33 Replacement parts 46 Return air filter 10, 33 Return air temperature sensor 27 Rigging unit 2, 5 Roof curb Assembly 2 Dimensions 3, 4 Leveling tolerances 2-4 Safety considerations 1 Service 43-50 Service ports 33 Start-up 33-43 Start-up checklist CL-1 Supply-air temperature sensor 19, 25 Thermostat 14, 28 Troubleshooting 51-56 Weight Corner 6-8 EconoMi$erIV 6-9 Maximum 5 MoistureMi$er 9 Unit 6-9 Wind baffle 11, 17, 18 Wiring 4 to 20 mA control 24 EconoMi$erIV 26 EconoMi$er2 26 Humidistat 31 Power connections 13 PremierLink 20 Thermostat 14 Unit 48, 49 57 SERVICE TRAINING Packaged Service Training programs are an excellent way to increase your knowledge of the equipment discussed in this manual, including: • Unit Familiarization • Installation Overview • Maintenance • Operating Sequence A large selection of product, theory, and skills programs are available, using popular video-based formats and materials. All include video and/or slides, plus companion book. Classroom Service Training which includes “hands-on” experience with the products in our labs can mean increased confidence that really pays dividends in faster troubleshooting and fewer callbacks. Course descriptions and schedules are in our catalog. CALL FOR FREE CATALOG 1-800-644-5544 [ ] Packaged Service Training [ ] Classroom Service Training Copyright 2006 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480016-01 Printed in U.S.A. Form 48TM-4SI Pg 58 3-06 Replaces: 48TM-3SI Book 1 4 Tab 1a 6a MODEL NO.: SERIAL NO.: DATE: TECHNICIAN: PRE-START-UP VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT VERIFY INSTALLATION OF INDOOR FAN MOTOR ADJUSTMENT BOLT AND PLATE VERIFY INSTALLATION OF OUTDOOR-AIR HOOD VERIFY INSTALLATION OF FLUE HOOD AND WIND BAFFLE VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT CHECK GAS PIPING FOR LEAKS CHECK THAT FILTERS AND SCREENS ARE CLEAN AND IN PLACE VERIFY THAT UNIT IS LEVEL CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE, AND VERIFY SETSCREW IS TIGHT VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED VERIFY THAT SCROLL COMPRESSOR IS ROTATING IN THE CORRECT DIRECTION VERIFY THAT CRANKCASE HEATER HAS BEEN ENERGIZED FOR 24 HOURS START-UP ELECTRICAL SUPPLY VOLTAGE L1-L2 L2-L3 L3-L1 COMPRESSOR AMPS — COMPRESSOR NO. 1 L1 L2 L3 — COMPRESSOR NO. 2 L1 L2 L3 SUPPLY FAN AMPS EXHAUST FAN AMPS TEMPERATURES OUTDOOR-AIR TEMPERATURE F DB (Dry-Bulb) RETURN-AIR TEMPERATURE F DB COOLING SUPPLY AIR F GAS HEAT SUPPLY AIR F F WB (Wet-Bulb) PRESSURES GAS INLET PRESSURE GAS MANIFOLD PRESSURE STAGE NO. 1 REFRIGERANT SUCTION CIRCUIT NO. 1 REFRIGERANT DISCHARGE CIRCUIT NO. 1 IN. WG IN. WG PSIG PSIG STAGE NO. 2 CIRCUIT NO. 2 CIRCUIT NO. 2 IN. WG PSIG PSIG VERIFY REFRIGERANT CHARGE USING CHARGING CHART ON PAGE 45. GENERAL ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO JOB REQUIREMENTS Copyright 2006 Carrier Corporation Book Tab Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. 1 4 Catalog No. 04-53480016-01 Printed in U.S.A. Form 48TM-4SI Pg CL-1 3-06 Replaces: 48TM-3SI 1a 6a - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE START-UP CHECKLIST
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