Page 1: Table Of Contents
48TC**04 --- 16 Nominal 3 to 15 Tons with Puron (R---410A) Refrigerant Service and Maintenance Instructions TABLE OF CONTENTS FASTENER TORQUE VALUES ....APPENDIX I. PHYSICAL DATA .
Page 2 physical injury. NOTE is used to highlight suggestions CAUTION which will result in enhanced installation, reliability, or operation. UNIT DAMAGE HAZARD IMPORTANT: Lockout/Tagout is a term used when Failure to follow this caution may result in reduced electrical power switches are physically locked unit performance or unit shutdown.
Page 3: Unit Arrangement And Access
UNIT ARRANGEMENT AND ACCESS Quarterly Inspection (& 30 days after initial start) S Replace return air filter General S Clean outdoor hood inlet filters Fig. 1 and Fig. 2 show the general unit arrangement and S Check belt tension access locations. S Check belt condition FILTER ACCESS S Check pulley alignment...
Page 4 CAUTION 17 1/4” (438 mm) PERSONAL INJURY HAZARD Failure to follow this caution may result in premature wear and damage to equipment. Dirt and debris can collect on heat exchangers and DIVIDER coils and can cause excessive current used resulting in OUTSIDE motor failure.
Page 5 MODEL NOMENCLATURE 11 12 13 15 16 17 18 Packaging and Seismic Compliant 0 = Standard 1 = LTL Unit Heat Type 3 = CA Seismic Compliant 48 – Gas Heat 4 = LTL and CA Seismic Compliant Label Packaged Rooftop Electrical Options A = None...
Page 6: Supply Fan (Blower) Section
SUPPLY FAN (BLOWER) SECTION Changing Fan Speed: 1. Shut off unit power supply. WARNING 2. Loosen belt by loosening fan motor mounting nuts. See Fig. 5. ELECTRICAL SHOCK HAZARD 3. Loosen movable pulley flange setscrew. See Fig. 7. 4. Screw movable flange toward fixed flange to in- Failure to follow this warning could cause personal injury or death.
Page 7: Staged Air Volume Control (Sav) - - 2 Speed
5. Install the new belt by gently sliding the belt over LOCKING COLLAR both pulleys and then sliding the motor and plate away from the fan housing until proper tension is achieved. 6. Check the alignment of the pulleys, adjust if neces- sary.
Page 8: Additional Variable Frequency Drive (Vfd) Installation And Troubleshooting
Additional Variable Frequency Drive (VFD) See “Variable Frequency Drive (VFD) Installation, Setup and Troubleshooting Supplement” for wiring schematics Installation and Troubleshooting and performance charts and configuration. Additional installation, wiring troubleshooting information for the Variable Frequency Drive can be found in the following manual: “Variable Frequency Drive (VFD) Installation, Setup and Troubleshooting Supplement.”...
Page 9 13. Inspect variable pitch pulley on old motor for cracks CAUTION and wear. 14. Remove variable pitch pulley from old motor and EQUIPMENT DAMAGE HAZARD attach it to the new motor. Secure the pulley to the motor by tightening the setscrew to the motor shaft. Failure to follow this caution can result in premature wear and damage to equipment.
Page 10: Cooling
Routine Cleaning of NOVATION Condenser Coil EXAMPLE - - Pulley dimensions 2.9 to 3.9 (full close to full open) Surfaces - - 3.9 - - 2.9 = 1 - - 1 divided by 5 (turns from full close to full open) DO NOT clean the NOVATION condenser coil with - - 0.2 change in pulley diameter per turn open chemicals.
Page 11 This Failure to follow this warning could cause personal cleaner available from Carrier Replacement injury, death. Components Division as part number P902- - 0301 for a one gallon container, and part number P902- - 0305 for a 5 Using a high pressure washer (900 psig - - 6205 kPa) gallon container.
Page 12 CAUTION UNIT DAMAGE HAZARD Failure to follow this caution can result in reduced unit performance or unit shutdown. High velocity water from a pressure washer, garden hose, or compressed air should never be used to clean a coil. The force of the water or air jet will bend the fin edges and increase airside pressure drop.
Page 13: Evaporator Coil Metering Devices
Acutrol + TXV to the underside of the diaphragm. Acutrol 3. The needle valve on the pin carrier is spring loaded, exerting pressure on the underside of the diaphragm. Therefore, the bulb pressure equals the evaporator Check this unit’s informative data plate for Position 6...
Page 14 CAPILLARY TUBE DIAPHRAGM PUSHRODS FEEDER TUBES INLET COIL OUTLET NEEDLE VALVE SPRING DISTRIBUTOR BULB EXTERNAL EQUALIZER TUBE C12046 Fig. 18 - - Thermostatic Expansion Valve (TXV) Operation Replacing TXV 10. Attach the equalizer tube to the suction line. If the replacement TXV has a flare nut on its equalizer line, CAUTION use a tubing cutter to remove the mechanical flare...
Page 15 C14125 48TC 7.5 TON 2 COMP REHEAT C14126 48TC 8.5, 10 TON 2 COMP REHEAT C14127 48TC 12.5 TON 2 COMP REHEAT C14128 Fig. 20 - - TXV Sensor Bulb Locations...
Page 16: Puronr (R- -410A) Refrigerant
Amount of refrigerant charge is listed on the unit’s caps. The hose connection fittings are standard 1/4 SAE nameplate. Refer Carrier GTAC2- - 5 Charging, male flare couplings. Recovery, Recycling and Reclamation training manual The brass fittings are two- - piece High Flow valves, with a and the following procedures.
Page 17 Low- -Charge Cooling READING THE CHART (EXAMPLE): Model 48TC*A04 Unit charging charts are used to diagnose and correct Outdoor Temperature ....85_F (29_C) incomplete (undercharged) conditions (and overcharged Suction Pressure .
Page 18 Sizes B04- -B07 When charging procedure is completed, remove the bypass wiring on the Motormaster control. Readjust the Refer to charts (Fig. 36- - 39) to determine the proper cooling thermostat setting and the humidistat setting to leaving condenser liquid temperature at the test condition appropriate design setpoints.
Page 19 Size E16 For Pressure Transducer wiring. Replace and secure the controller cover. Check for clearances around the blower Unit size E16 (two circuit design with TXVs) uses the and belt. Restore power to the unit. liquid temperature/discharge pressure charging method. Charge check and adjustment See Fig.
Page 20 FROM FUSE BLOCK TERMINAL BLOCK 12 13A TO PRESSURE T1 T2 T3 B- B+ TRANSDUCER PRESSURE TRANSDUCER TO MOTOR(S) C10773 Fig. 22 - - MM- -V Bypass Conns PT Conns Bypass Motormaster Controller and LAS Change unit mode to Reheat2. Adjust the humidistat to lowest possible setting, then adjust the thermostat to a To bypass the 32LT and run outdoor fan motors OFM1 high setting until there is no demand on Y1.
Page 21: Cooling Charging Charts
COOLING CHARGING CHARTS Table 2 – Single Compressor Position 6 = A Unit Reference Fig. Figure Title Source Drw Nbr -- Rev Size Tons 3 Tons Charging Chart, 48TC Size A04 48TM500231 Rev 3.0 4 Tons Charging Chart, 48TC Size A05 48TM500232 Rev 3.0 5 Tons Charging Chart, 48TC Size A06...
Page 22 COOLING CHARGING CHARTS OUTDOOR TEMP 1241 ° F ° C 1172 1103 1034 SUCTION LINE TEMPERATURE ( °F) SUCTION LINE TEMPERATURE ( °C) C12132 Fig. 23 - - Charging Chart, 48TC Size A04 OUTDOOR TEMP 1241 ° F ° C 1172 1103 1034...
Page 23 COOLING CHARGING CHARTS (cont.) OUTDOOR TEMP 1241 ° F ° C 1172 1103 1034 SUCTION LINE TEMPERATURE ( °F) SUCTION LINE TEMPERATURE ( °C) C12134 Fig. 25 - - Charging Chart, 48TC Size A06 OUTDOOR TEMP 1241 ° F ° C 1172 1103 1034...
Page 24 COOLING CHARGING CHARTS (cont.) 7.5 TON CHARGING CHART R410A REFRIGERANT 1172 OUTDOOR TEMP 1103 115 / 46 105 / 41 95 / 35 1034 85 / 29 75 / 24 65 / 18 55 / 13 45 / 7 SUCTION LINE TEMPERATURE ( SUCTION LINE TEMPERATURE ( 48TM500885 3 .
Page 25 COOLING CHARGING CHARTS (cont.) 10 TON CHARGING CHART R410A REFRIGERANT OUTDOOR TEMP 1241 115 / 46 105 / 41 95 / 35 1103 85 / 29 75 / 24 65 / 18 55 / 13 45 / 7 SUCTION LINE TEMPERATURE ( SUCTION LINE TEMPERATURE ( 48TM500887 3 .
Page 26 COOLING CHARGING CHARTS (cont.) C13214 Fig. 31 - - Charging Chart, 48TC Size D, E 09 OUTDOOR TEMP 115 / 46 1241 105 / 41 95 / 35 1172 85 / 29 75 / 24 1103 65 / 18 55 / 13 1034 45 / 7 SUCTION LINE TEMPERATURE (...
Page 27 COOLING CHARGING CHARTS (cont.) C14064 Fig. 33 - - Cooling Charging Charts (12.5 Ton)
Page 28 COOLING CHARGING CHARTS (cont.) C13217 Fig. 34 - - Charging Chart, 48TC Size D14 with Novation Coil...
Page 29 COOLING CHARGING CHARTS (cont.) C13218 Fig. 35 - - Charging Chart, 48TC Size D16...
Page 30 COOLING CHARGING CHARTS (cont.) C10666 Fig. 36 - - Charging Chart, 48TC Size B04 Humidi- -MiZer in Reheat 1...
Page 31 COOLING CHARGING CHARTS (cont.) C10667 Fig. 37 - - Charging Chart, 48TC Size B05 Humidi- -MiZer in Reheat 1...
Page 32 COOLING CHARGING CHARTS (cont.) C10668 Fig. 38 - - Charging Chart, 48TC Size B06 Humidi- -MiZer in Reheat 1...
Page 33 COOLING CHARGING CHARTS (cont.) C10669 Fig. 39 - - Charging Chart, 48TC Size B07 Humidi- -MiZer in Reheat 1...
Page 34: Compressor
COMPRESSOR Compressor Rotation On 3- - phase units with scroll compressors, it is important Lubrication to be certain compressor is rotating in the proper direction. To determine whether or not compressor is The compressor is charged with the correct amount of oil rotating in the proper direction: at the factory.
Page 35 TROUBLESHOOTING COOLING SYSTEM Refer to Table 5 for Troubleshooting Cooling System topics. Table 5 – Cooling System Troubleshooting PROBLEM CAUSE REMEDY Power failure. Call power company. Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. Defective thermostat, contactor, transformer, or Compressor and Replace defective component.
Page 36: Convenience Outlets
CONVENIENCE OUTLETS WARNING ELECTRICAL OPERATION HAZARD Failure to follow this warning could result in personal injury or death. Units with convenience outlet circuits can use multiple disconnects. Check convenience outlet for power status before opening unit for service. Locate its disconnect switch, if appropriate, and open it. Tag- - out this switch, if necessary.
Page 37: Smoke Detectors
4. Press the RESET button to clear the tripped 4. Mount the weatherproof cover to the backing plate condition. as shown in Fig. 43. 5. Remove two slot fillers in the bottom of the cover Fuse on powered type: The factory fuse is a Bussman allowing service tool cords to exit the cover.
Page 38 Sensor For installations using two sensors, the duct smoke detector does not differentiate which sensor signals an The sensor, see Fig. 45, includes a plastic housing, a alarm or trouble condition. printed circuit board, a clear plastic cover, a sampling Smoke Detector Locations tube inlet and an exhaust tube.
Page 39 housing, placing it across the return air opening on the nection of the flexible tubing to the sampling tube is unit basepan. See Fig. 48. The holes in the sampling tube the same. face downward, into the return air stream. The sampling RETURN AIR SENSOR tube is connected through tubing to the return air sensor (Operating Position Shown)
Page 40 C14052 Fig. 51 - - Typical Smoke Detector System Wiring...
Page 41: Sensor And Controller Tests
Dirty Controller Test Table 6 – Smoke Detector Field Use Wires Wire The dirty controller test checks the controller’s ability to Unit Source / Smoke Detector Terminals Color initiate a dirty sensor test and indicate its results. 24VAC (Unit CTB) NOTICE: Pressing the controller’s test/reset switch for longer than seven seconds will put the duct detector into COM, 24VAC (Unit CTB)
Page 42 Configuring the Dirty Sensor Test Operation C08247 Fig. 52 - - Remote Test/Reset Station Connections 1. Hold the test magnet where indicated on the side of the sensor housing until the sensor’s Alarm LED NOTICE: If the test/reset station’s key switch is left in turns on and its Dirty LED flashes twice (approxim- the RESET/TEST position for longer than seven seconds, ately 60 seconds).
Page 43: Indicators
INDICATORS controller’s Trouble LED flashes continuously. S If a wiring fault between a sensor and the controller, the Normal State controller’s Trouble LED turns on but not the sensor’s. The smoke detector operates in the normal state in the TROUBLE absence of any trouble conditions and when its sensing chamber is free of smoke.
Page 44: Protective Devices
Controller’s Trouble LED is Flashing Over Temperature 1. One or both of the sensors is 100% dirty. The compressor has an internal protector to protect it 2. Determine which Dirty LED is flashing then clean against excessively high discharge gas temperatures. that sensor assembly as described in the detector cleaning section.
Page 45: Gas Heating System
Control Circuit, 24- - V On 48TC size 16, the tubes are arranged in a two- - pass flow pattern. Each tube has a smooth primary tube The control circuit is protected against overcurrent segment on the bottom pass through the heating plenum conditions by a circuit breaker mounted on control and a dimpled secondary tube segment on the top pass as transformer TRAN.
Page 46 Table 9 – Quantity of Heating Stages MODELS SIZES 3---PH 1---PH SIDE SHOT LIMIT SWITCH 04--- 06 DOWN SHOT LIMIT SWITCH 48TCD, S 08--- 09 12--- 16 05--- 06 48TCE, R 08--- 16 05--- 06 48TCF,T 08--- 16 48TCL, M 04--- 06 48TCN 05--- 06...
Page 47 Table 12 – Liquid Propane Supply Line Pressure This switch also prevents operation when the propane tank Ranges level is low which can result in gas with a high concentration of impurities, additives, and residues that UNIT MODEL UNIT SIZE have settled to the bottom of the tank.
Page 48 HEATER TUBE ASSEMBLY SEAL STRIPS, SPONGE RUBBER REGULATOR GASKET REGULATOR RETAINER WIND CAP ASSEMBLY (SHOWN INVERTED AS SHIPPED) SUPPORT INSULATION ASSEMBLY INDUCER FAN-MOTOR ASSEMBLY BURNER ASSEMBLY C08227 Fig. 60 - - Typical Heat Exchanger Assembly Sizes 04- -14 Heater Tube Assembly Inducer Fan Assembly Insulation...
Page 49 Burners and Igniters 6. Remove igniter wires and sensor wires at the Integ- rated Gas Unit Controller (IGC). See Fig. 64. CAUTION INTEGRATED GAS UNIT RACEWAY CONTROLLER (IGC) EQUIPMENT DAMAGE HAZARD Failure to follow this caution can result in equipment damage.
Page 50 1. Remove manifold pressure tap plug from manifold and connect pressure gauge or manometer. See Fig. 2. Turn on electrical supply. 3. Turn on unit main gas valve. 4. Set room thermostat to call for heat. If unit has two- - 125,000/90,000 BTUH INPUT stage gas valve, verify high- - stage heat operation be- fore attempting to adjust manifold pressure.
Page 51 Evaporator Fan On/Off Delay Modified indicates orifice reference size). When replacing unit 2 Flashes Limit Switch Fault orifices, order the necessary parts through Carrier RCD. 3 Flashes Flame Sense Fault See Table 16 for available orifice sizes. See Table 17...
Page 52 Red LED-Status C08452 Fig. 69 - - Integrated Gas Control (IGC) Board Table 15 – IGC Connections CONNECTION TERMINAL LABEL POINT DESCRIPTION SENSOR LOCATION TYPE OF I/O PIN NUMBER INPUTS RT, C Input power from TRAN 1 control box 24 VAC —...
Page 53 Table 16 – Orifice Sizes ORIFICE CARRIER DRILL DRILL SIZE PART NUMBER DIA. (in.) LH32RF129 0.1285 LH32RF125 0.1250 LH32RF120 0.1200 LH32RF116 0.1160 LH32RF113 0.1130 LH32RF111 0.1110 LH32RF110 0.1100 LH32RF105 0.1065 LH32RF104 0.1040 LH32RF102 0.1015 LH32RF103 0.0995 LH32RF098 0.0980 LH32RF096 0.0960 LH32RF094 0.0935...
Page 54 Table 17 – Altitude Compensation* Low NOx Models 48TC04- - 06 (L, M, N) NATURAL GAS ONLY NOMINAL HEAT INPUT ELEVATION 60k BTUH 90k BTUH 120k BTUH Orifice Input Orifice Input Orifice Input Feet Meters Size (btu/hr) Size (btu/hr) Size (btu/hr) 0 --- 2000 0 --- 610...
Page 55 Table 18 – Altitude Compensation* Models 48TC04- - 07 (D, E, F, S, R, T) NATURAL GAS NOMINAL HEAT INPUT ELEVATION 72k BTUH 115k BTUH 150k BTUH Orifice Input Orifice Input Orifice Input Feet Meters Size (btu/hr) Size (btu/hr) Size (btu/hr) 0 --- 2000 0 --- 610...
Page 56 Table 19 – Altitude Compensation* Models 48TC04- - 07 (D, E, F, S, R, T) PROPANE GAS NOMINAL HEAT INPUT ELEVATION 72k BTUH 115k BTUH 150k BTUH Orifice Input Orifice Input Orifice Input Feet Meters Size (btu/hr) Size (btu/hr) Size (btu/hr) 0 --- 2000 0 --- 610...
Page 57 Table 20 – Altitude Compensation* Models 48TC08- - 14 (D, E, F, S, R, T) NATURAL GAS NOMINAL HEAT INPUT ELEVATION 72k BTUH 125k BTUH 150k BTUH 180k BTUH 224k BTUH 250k BTUH Orifice Input Orifice Input Orifice Input Orifice Input Orifice Input...
Page 58 Table 22 – Altitude Compensation* Models 48TC16 (D, E, F, S, R, T) NATURAL GAS NOMINAL HEAT INPUT ELEVATION 150k BTUH 180k BTUH 240k BTUH 315k BTUH 350k BTUH Orifice Input Orifice Input Orifice Input Orifice Input Orifice Input Size (btu/hr) Size (btu/hr)
Page 59 Minimum heating entering air temperature Thermostat LCTB When operating on first stage heating, the minimum temperature of air entering the dimpled heat exchanger is OALT 50_F (10 _C) continuous and 45_F (7 _C) intermittent for standard heat exchangers and 40_F (4 _C) continuous and 35_F (2 _C) intermittent for stainless steel heat exchangers.
Page 60 Table 24 – Heating Service Troubleshooting PROBLEM CAUSE REMEDY Check flame ignition and sensor electrode positioning. Misaligned spark electrodes. 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 No gas at main burners.
Page 61 Table 25 – IGC Board LED Alarm Codes ACTION TAKEN BY FLASH DESCRIPTION RESET METHOD PROBABLE CAUSE CONTROL CODE Normal Operation — — — Loss of power to the IGC. Check 5 amp fuse on IGC, power to unit, 24V circuit Hardware Failure No gas heating.
Page 62: Premierlink Control
Open enables the unit to run in 100% stand- - alone control and Service Tool. (Standard tier display tools Navigatort mode, Carrier’s I- - Vu Open network, or a Third Party and Scrolling Marquee are not suitable for use with latest Building Automation System (BAS).
Page 63: Sensory/Accessory Installation
SENSORY/ACCESSORY WARNING INSTALLATION ELECTRICAL SHOCK HAZARD There are a variety of sensors and accessories available for the RTU-OPEN. Some of these can be factory or field Failure to follow this warning could result in personal installed, while others are only field installable. The injury, death and/or equipment damage.
Page 64: Humidi- - Mizer Adaptive Dehumidification
HUMIDI- -MIZER ADAPTIVE the bypassed discharge gas offsets the Sensible Cooling effect from the evaporator coil during the Reheat2 Mode. DEHUMIDIFICATION SYSTEM See Fig. 76. Units equipped with the factory installed Humidi- - MiZer If the space temperature drops during a Reheat2 Mode option are capable of providing multiple modes of until the Heating Thermostat W1 closes, the W1 signal is improved dehumidification as variations of the normal...
Page 65 valves, remain de- - energized and closed. See Fig. 75 for Hot Gas Reheat (Reheat 2) Mode: When the unit is illustration of each circuit’s operation. operating in a part- - load Cooling Mode (with the space temperature above the set- - point, but only Y1 calling) and Hot Gas Reheat (Reheat 2) Mode: When the unit is the space humidity is also above its set- - point, the operating in a part- - load Cooling Mode (space temperature...
Page 66 DSVx INDOOR LEAVING VALVE METERING DEVICE (TXV) CONDENSER COIL HUMIDI-MIZER COIL OUTDOOR AIR CSVx VALVE COMPRESSOR EVAPORATOR COIL ACUTROL METERING = CLOSED VALVE DEVICE = OPEN VALVE INDOOR ENTERING C12647 Fig. 74 - - Normal Cooling Mode (Sizes 04 / 07 - - Type 1) - - Humidi- -MiZer System with Single Stage Cooling (Sizes 08- -14 have two parallel circuits) DSVx...
Page 67 INDOOR LEAVING RDV1 RDV2 VALVE VALVE LDV1 LDV2 HUMIDI-MIZER COIL VALVE VALVE CONDENSER COIL CONDENSER COIL CIR 1 CIR 2 OUTDOOR AIR OUTDOOR AIR METERING METERING COMPRESSOR DEVICE DEVICE COMPRESSOR CIR 1 CIR 2 = CLOSED VALVE EVAPORATOR COIL = OPEN VALVE = 3-WAY VALVE INDOOR ENTERING C12705...
Page 68 HK50AA050 DHRA DHRB IN: HTSTAT-LTLO IN: CTB R 24-V \ | - - - | DHRB2 DHRB2 IN: TSTAT W1 IN: TSTAT W1 OUT: LSV1,2 OUT: LSV1,2 | - - - - | OUT: DSV1 \ | - - - | \ | - - - | DHRB2...
Page 75 Table 33 – Humidi- - MiZer Troubleshooting PROBLEM CAUSE SOLUTION No Dehumidification Demand. See “No Dehumidification Demand” below. Outdoor temperature too low. Compare outdoor temperature to LTLO setting. Normal operation. Reheat1 (Subcooling) Mode Will Not General Cooling Mode problem. See Cooling Service Troubleshooting. Activate Faulty Reheat Control Board (RCB) relay operation.
Page 76 Table 33 - - Humidi- - MiZer Troubleshooting (cont) PROBLEM CAUSE SOLUTION Reheat Control board: No Input on RCB pin J1B- - 4. Compressor Not Running in Reheat2 Mode. See “Reheat Control Board (RCB) Relay Operation”. RCB Relay failure at output RCB pins J1A- - 5 J1B- - 1.
Page 77 Table 34 – Inputs/Modes/Outputs Summary HUM/ MODE COMP1 COMP2 LSV1 LSV2 DSV1 DSV2 LTLO Normal ON=G ON=R Normal Cool1 ON=Y1 ON=G ON=R Normal Cool2 0N=Y2 ON=G ON=R Normal Heat 1 ON=G ON=R Reheat Dehumidify ON=G ON=R ON=R Subcool Cool1 and Cir1/ Cool2/Subcool--- ON=G...
Page 78: Economizer Systems
ECONOMIZER SYSTEMS ECONOMI$ER IV CONTROLLER The 48TC units may be equipped with a factory- - installed OUTSIDE AIR WIRING TEMPERATURE SENSOR HARNESS or accessory (field- - installed) economizer system. Two LOW AMBIENT SENSOR types are available: with a logic control system ACTUATOR (EconoMi$er without...
Page 79 BLACK TRANSFORMER GROUND BLUE 500 OHM RESISTOR VIOLET NOTE 1 PINK OAT SENSOR 24 VAC NOTE 3 50HJ540573 ACTUATOR ASSEMBLY 4-20 mA WHITE DIRECT DRIVE 4-20mA SIGNAL TO J9 ON ACTUATOR PremierLink BOARD ECONOMISER2 PLUG NOTES: 1. Switch on actuator must be in run position for economizer to operate. 2.
Page 80 The temperature sensor looks like an eyelet terminal with shown. An EconoMi$er IV simulator program is available wires running to it. The sensor is located in the “crimp from Carrier to help with EconoMi$er IV training and end” and is sealed from moisture. troubleshooting.
Page 81 temperature is compared to an adjustable setpoint selected Differential Dry Bulb Control on the control. If the outdoor-air temperature is above the For differential dry bulb control the standard outdoor dry setpoint, the EconoMi$er IV will adjust the outside air bulb sensor is used in conjunction with an additional dampers to minimum position.
Page 82 (29) (32) (35) (38) (41) (43) CONTROL CONTROL POINT CURVE APPROX. deg. F (deg. C) AT 50% RH (27) 73 (23) 70 (21) 67 (19) 63 (17) (24) (21) (18) (16) (13) (10) HIGH LIMIT CURVE (10) (13) (16) (18) (21) (24) (27)
Page 83 To determine the minimum position setting, perform the CO SENSOR MAX RANGE SETTING following procedure: 6000 1. Calculate the appropriate mixed air temperature 5000 using the following formula: 4000 ) + (TR 800 ppm ) =T 900 ppm 3000 1000 ppm = Outdoor-Air Temperature 1100 ppm 2000...
Page 84 A proportional anticipatory strategy should be taken with the following conditions: a zone with a large area, varied Use setting 1 or 2 for Carrier equipment. occupancy, and equipment that cannot exceed the required 1. Press Clear and Mode buttons. Hold at least 5 ventilation rate at design conditions.
Page 85 Single Enthalpy 4. Use the Up/Down button to toggle through each of the nine variables, starting with Altitude, until the desired setting is reached. To check single enthalpy: 5. Press Mode to move through the variables. 1. Make sure EconoMi$er IV preparation procedure 6.
Page 86 EconoMi$er IV Troubleshooting Completion 6. Turn the Minimum Position Potentiometer fully CW. The actuator should drive fully open. 7. Remove the jumper from TR and N. The actuator This procedure is used to return the EconoMi$er IV to should drive fully closed. operation.
Page 87: Pre- -Start- -Up
PRE- -START- -UP 2. Read and follow instructions on all WARNING, CAUTION, and INFORMATION labels attached to, or shipped with, unit. WARNING 3. Make the following inspections: a. Inspect for shipping and handling damages PERSONAL INJURY HAZARD such as broken lines, loose parts, or discon- Failure to follow this warning could result in personal nected wires, etc.
Page 88 Gas Piping Refrigerant Service Ports Check gas piping for leaks. Each unit system has two 1/4” SAE flare (with check valves) service ports: one on the suction line, and one on WARNING the compressor discharge line. Be sure that caps on the ports are tight.
Page 89 Refer to Table 16 through Table 20 for the correct orifice If the limit switch trips at the start of the heating cycle to use at high altitudes. during the evaporator on delay, the time period of the on delay for the next cycle will be 5 seconds less than the Heating time at which the switch tripped.
Page 90: Start- -Up, Premierlink Controls
- up. setpoints from a zone sensor or terminal control module. During start- - up, the Carrier software can also be used to verify communication with PremierLink controller. NOTE: All set- - up and setpoint configurations are factory set and field- - adjustable.
Page 91: Appendix I. Physical Data
APPENDIX I. PHYSICAL DATA Table 39 – PHYSICAL DATA (COOLING) 3 - - 6 TONS 48TC*A04 48TC*A05 48TC*A06 48TC*A07 Refrigeration System # Circuits / # Comp. / Type 1 / 1 / Scroll 1 / 1 / Scroll 1 / 1 / Scroll 1 / 1 / Scroll Puronr refrig.
Page 92 APPENDIX I. PHYSICAL DATA (cont.) Table 40 – PHYSICAL DATA (HEATING) 3 - - 6 TONS 48TC**04 48TC**05 48TC**06 48TC**07 Gas Connection # of Gas Valves Nat. gas supply line press (in. w.g.)/ (PSIG) 4 --- 13 / 0.18 --- 0.47 4 --- 13 / 0.18 --- 0.47 4 --- 13 / 0.18 --- 0.47 4 --- 13 / 0.18 --- 0.47...
Page 93 APPENDIX I. PHYSICAL DATA (cont.) Table 41 – PHYSICAL DATA (COOLING) 7.5 - - 8.5 TONS 48TC*A08 48TC*D08 48TC*A09 48TC*D09 Refrigeration System # Circuits / # Comp. / Type 1 / 1 / Scroll 2 / 2 / Scroll 1 / 1 / Scroll 2 / 2 / Scroll RTPF models R--- 410a charge A/B (lbs --- oz) 13 --- 12...
Page 94 APPENDIX I. PHYSICAL DATA (cont.) Table 42 – PHYSICAL DATA (COOLING) 10 - - 15 TONS 48TC*A12 48TC*D12 48TC*D14 48TC*D16 Refrigeration System # Circuits / # Comp. / Type 1 / 1 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll RTPF models R--- 410a charge A/B (lbs --- oz) 20 --- 0...
Page 95 APPENDIX I. PHYSICAL DATA (cont.) Table 43 – PHYSICAL DATA (HEATING) 7.5 - - 10 TONS 48TC**08 48TC**09 48TC**12 Gas Connection # of Gas Valves Nat. gas supply line press (in. w.g.)/ (PSIG) 4 --- 13 / 0.18 --- 0.47 4 --- 13 / 0.18 --- 0.47 4 --- 13 / 0.18 --- 0.47 LP supply line press (in.
Page 96 APPENDIX I. PHYSICAL DATA (cont.) Table 44 – PHYSICAL DATA (HEATING) 12.5 - - 15 TONS 48TC**14 48TC**16 Gas Connection # of Gas Valves Nat. gas supply line press (in. w.g.)/ (PSIG) 4 --- 13 / 0.18 --- 0.47 5 --- 13 / 0.18 --- 0.47 LP supply line press (in.
Page 97: Appendix Ii. Fan Performance
4. The Fan Performance tables offer motor/drive recommendations. In cases when two motor/drive combinations would work, Carrier recommended the lower horsepower option. 5. For information on the electrical properties of Carrier’s motors, please see the Electrical information section of this book.
Page 98 APPENDIX II. FAN PERFORMANCE (cont.) Table 45 – 48TC**04 1 PHASE 3 TON HORIZONTAL SUPPLY Available External Static Pressure (in. wg) 0.14 0.22 0.32 0.42 0.53 0.16 0.25 0.35 0.46 0.57 1050 0.18 0.28 0.38 0.49 0.61 1125 0.21 0.31 0.42 0.54 1001...
Page 99 APPENDIX II. FAN PERFORMANCE (cont.) Table 47 – 48TC**04 3 PHASE 3 TON HORIZONTAL SUPPLY Available External Static Pressure (in. wg) 0.14 0.22 0.32 0.42 0.53 0.16 0.25 0.35 0.46 0.57 1050 0.18 0.28 0.38 0.49 0.61 1125 0.21 0.31 0.42 0.54 1001...
Page 100 APPENDIX II. FAN PERFORMANCE (cont.) Table 49 – 48TC**05 1 PHASE 4 TON HORIZONTAL SUPPLY Available External Static Pressure (in. wg) 1200 0.23 0.34 0.46 0.58 1020 0.71 1300 0.28 0.40 0.52 0.65 1044 0.78 1400 0.33 0.45 0.58 0.72 1070 0.86 1500...
Page 101 APPENDIX II. FAN PERFORMANCE (cont.) Table 51 – 48TC**05 3 PHASE 4 TON HORIZONTAL SUPPLY Available External Static Pressure (in. wg) 1200 0.23 0.34 0.46 0.58 1020 0.71 1300 0.28 0.40 0.52 0.65 1044 0.78 1400 0.33 0.45 0.58 0.72 1070 0.86 1500...
Page 102 APPENDIX II. FAN PERFORMANCE (cont.) Table 53 – 48TC**06 1 PHASE 5 TON HORIZONTAL SUPPLY Available External Static Pressure (in. wg) 1500 0.39 0.49 0.60 1087 0.72 1169 0.85 1625 0.48 0.59 1038 0.70 1122 0.83 1201 0.96 1750 0.59 0.70 1078 0.82...
Page 103 APPENDIX II. FAN PERFORMANCE (cont.) Table 55 – 48TC**06 3 PHASE 5 TON HORIZONTAL SUPPLY Available External Static Pressure (in. wg) 1500 0.39 0.49 0.60 1087 0.72 1169 0.85 1625 0.48 0.59 1038 0.70 1122 0.83 1201 0.96 1750 0.59 0.70 1078 0.82...
Page 104 APPENDIX II. FAN PERFORMANCE (cont.) Table 57 – 48TC**07 3 PHASE 6 TON HORIZONTAL SUPPLY Available External Static Pressure (in. wg) 1800 0.64 1010 0.80 1098 0.98 1178 1.16 1252 1.35 1950 0.78 1065 0.96 1148 1.14 1226 1.34 1298 1.54 2100 1032...
Page 105 APPENDIX II. FAN PERFORMANCE (cont.) Table 59 – 48TC**08 3 PHASE 7.5 TON HORIZONTAL SUPPLY Available External Static Pressure (in. wg) 2250 0.52 0.73 0.97 1.22 1.50 2438 0.62 0.85 1.09 1.36 1.65 2625 0.74 0.98 1.23 1.51 1.81 2813 0.88 1.13 1.39...
Page 106 APPENDIX II. FAN PERFORMANCE (cont.) Table 61 – 48TC**09 3 PHASE 8.5 TON HORIZONTAL SUPPLY Available External Static Pressure (in. wg) 2550 0.48 0.61 0.75 0.90 1.05 2763 0.58 0.72 0.87 1.03 1.19 2975 0.70 0.86 1.01 1.18 1.35 3188 0.84 1.00 1.17...
Page 107 APPENDIX II. FAN PERFORMANCE (cont.) Table 63 – 48TC**12 3 PHASE 10 TON HORIZONTAL SUPPLY Available External Static Pressure (in. wg) 3000 0.70 0.89 1.09 1.29 1.50 3250 0.85 1.06 1.27 1.49 1.71 3500 1.03 1.25 1.48 1.71 1.95 3750 1.23 1.47 1.71...
Page 108 APPENDIX II. FAN PERFORMANCE (cont.) Table 65 – 48TC**14 3 PHASE 12.5 TON HORIZONTAL SUPPLY Available External Static Pressure (in. wg) 3438 0.98 1.20 1.43 1.65 1.88 3750 1.23 1.47 1.71 1.96 2.21 4063 1.52 1.78 2.04 2.31 2.57 4375 1.85 2.13 2.41...
Page 109 APPENDIX II. FAN PERFORMANCE (cont.) Table 67 – 48TC**16 3 PHASE 15 TON VERTICAL SUPPLY Available External Static Pressure (in. wg) 4500 0.98 1.26 1.55 1.86 2.20 4875 1.18 1.49 1.80 2.13 2.47 5250 1.42 1.75 2.09 2.43 2.78 5625 1.68 2.05 2.40...
Page 110 APPENDIX II. FAN PERFORMANCE (cont.) Table 69 – PULLEY ADJUSTMENT MOTOR PULLEY TURNS OPEN (RPM) MOTOR/DRIVE UNIT COMBO Standard Static Medium Static 1175 1135 1094 1054 1013 Standard Static Medium Static 1175 1135 1094 1054 1013 High Static 1466 1423 1380 1337 1294...
Page 111: Appendix Iii. Wiring Diagrams
APPENDIX III. WIRING DIAGRAMS Table 70 – Wiring Diagrams - - Refrigeration System STANDARD HUMIDI---MIZER™ SIZE VOLTAGE CONTROL POWER CONTROL POWER 208/230---1---60 48TM500213 L 48TM500749 M 208/230---3---60 48TM500213 L 48TM500748 N A04/A05/A06 460---3---60 48TM500213 L 48TM500748 N 575---3---60 48TM500213 L 48TM500215 P 208/230---1---60 48TM500213 L...
Page 112 TABLE OF WIRING DIAGRAM FIGURE NUMBERS UNIT MODELS DIAGRAM TYPE FIGURE NUMBER UNITS WITH STANDARD REFRIGERATION SYSTEM Control Power, 208/230-1-60 48TC A04-07 Power, 208/230-3-60, 460-3-60 Power, 575-3-60 Control 48TC A08-12 Power, 208/230-3-60, 460-3-60 Power, 575-3-60 Control 48TC D08-12 Power, 208/230-3-60, 460-3-60 Power, 575-3-60 Control 48TC D14...
Page 113 APPENDIX III. WIRING DIAGRAMS C12408 Fig. 94 - - 48TC A04 - - A07 Control Diagram; 208/230- -1- -60; 208/230- -3- -60; 460- -3- -60;575- -3- -60...
Page 114 APPENDIX III. WIRING DIAGRAMS C14065 Fig. 95 - - 48TC A08 - - A12 Control Diagram; 208/230- -3- -60; 460- -3- -60;575- -3- -60...
Page 115 APPENDIX III. WIRING DIAGRAMS C13240 Fig. 96 - - 48TC D08- -D12 Control Diagram; 208/230- -3- -60; 460- -3- -60;575- -3- -60...
Page 116 APPENDIX III. WIRING DIAGRAMS C13241 Fig. 97 - - 48TC D14 Control Diagram; 208/230- -3- -60; 460- -3- -60;575- -3- -60...
Page 117 APPENDIX III. WIRING DIAGRAM LIST C12412 Fig. 98 - - 48TC D16 Control Diagram; 208/230- -3- -60; 460/575- -3- -60...
Page 118 APPENDIX III. WIRING DIAGRAM LIST C14066 Fig. 99 - - 48TC B04- -B07 Control Diagram; 208/230- -3- -60; 460/575- -3- -60 with Humidi- -MiZert...
Page 119 APPENDIX III. WIRING DIAGRAM LIST C12425 Fig. 100 - - 48TC E08- -E12 Control Diagram; 208/230- -3- -60; 460/575- -3- -60 with Humidi- -MiZert...
Page 120 APPENDIX III. WIRING DIAGRAM LIST C14062 Fig. 101 - - 48TC E14 Control 208/230- -3- -60, 460- -3- -60, 575- -3- -60 with Humidi- -MiZert...
Page 121 APPENDIX III. WIRING DIAGRAM LIST C13243 Fig. 102 - - 48TC E16 Control Diagram; 208/230- -3- -60; 460/575- -3- -60 with Humidi- -MiZert...
Page 122 APPENDIX III. WIRING DIAGRAMS C12413 Fig. 103 - - 48TC A04- -A07 Power Diagram; 208/230- -1- -60...
Page 123 APPENDIX III. WIRING DIAGRAMS C12414 Fig. 104 - - 48TC A04- -A07 Power Diagram; 208/230- -3- -60; 460- -3- -60...
Page 124 APPENDIX III. WIRING DIAGRAM LIST C12415 Fig. 105 - - 48TC A04- -A07 Power Diagram; 575- -3- -60...
Page 125 APPENDIX III. WIRING DIAGRAMS C13245 Fig. 106 - - 48TC A08- -A12 Power Diagram; 208/230- -3- -60; 460- -3- -60...
Page 126 APPENDIX III. WIRING DIAGRAM LIST C13246 Fig. 107 - - 48TC A08- -A12 Power Diagram; 575- -3- -60...
Page 127 APPENDIX III. WIRING DIAGRAMS C13484 Fig. 108 - - 48TC D08- -D12 Power Diagram; 208/230- -3- -60; 460- -3- -60...
Page 128 APPENDIX III. WIRING DIAGRAM LIST C13247 Fig. 109 - - 48TC D08- -D12 Power Diagram; 575- -3- -60...
Page 129 APPENDIX III. WIRING DIAGRAMS C13248 Fig. 110 - - 48TC D14 Power Diagram; 208/230- -3- -60; 460- -3- -60...
Page 130 APPENDIX III. WIRING DIAGRAM LIST C13249 Fig. 111 - - 48TC D14 Power Diagram; 575- -3- -60...
Page 131 APPENDIX III. WIRING DIAGRAMS C12428 Fig. 112 - - 48TC B04- -B07 Power Diagram; 208/230- -1- -60 with Humidi- -MiZert...
Page 132 APPENDIX III. WIRING DIAGRAM LIST C12429 Fig. 113 - - 48TC B04- -B07 Power Diagram; 208/230- -3- -60; 460- -3- -60 with Humidi- -MiZert...
Page 133 APPENDIX III. WIRING DIAGRAM LIST C12430 Fig. 114 - - 48TC B04- -B07 Power Diagram; 575- -3- -60 with Humidi- -MiZert...
Page 134 APPENDIX III. WIRING DIAGRAMS C12432 Fig. 115 - - 48TC E08- -E12 Power Diagram; 208/230- -3- -30; 460- -3- -60 with Humidi- -MiZert...
Page 135 APPENDIX III. WIRING DIAGRAM LIST C12433 Fig. 116 - - 48TC E08- -E12 Power Diagram; 575- -3- -60 with Humidi- -MiZert...
Page 136 APPENDIX III. WIRING DIAGRAMS C12434 Fig. 117 - - 48TC E14 Power Diagram; 208/230- -3- -60; 460- -3- -60 with Humidi- -MiZert...
Page 137 APPENDIX III. WIRING DIAGRAM LIST C12435 Fig. 118 - - 48TC E14 Power Diagram; 575- -3- -60 with Humidi- -MiZert...
Page 138 APPENDIX III. WIRING DIAGRAM LIST C12422 Fig. 119 - - 48TC D16 Power Diagram; 208/230- -3- -60; 460- -3- -60...
Page 139 APPENDIX III. WIRING DIAGRAMS C12423 Fig. 120 - - 48TC D16 Power Diagram; 575- -3- -60...
Page 140 APPENDIX III. WIRING DIAGRAM LIST C12436 Fig. 121 - - 48TC E16 Power Diagram; 208/230- -3- -60; 460- -3- -60 with Humidi- -MiZert...
Page 141 APPENDIX III. WIRING DIAGRAMS C12437 Fig. 122 - - 48TC E16 Power Diagram; 575- -3- -60 with Humidi- -MiZert...
Page 142 APPENDIX III. WIRING DIAGRAM LIST C14063 Fig. 123 - - 48TC A04- -12, D08- -14 PremierLink Control Diagram...
Page 143 APPENDIX III. WIRING DIAGRAM LIST C13485 Fig. 124 - - 48TC 16 PremierLink Control Diagram...
Page 144 APPENDIX III. WIRING DIAGRAM LIST C13486 Fig. 125 - - 48TC A04- -07, A08- -12, B04- -07, D08- -14, E08- -14 RTU Open Control Diagram...
Page 145 APPENDIX III. WIRING DIAGRAM LIST C13487 Fig. 126 - - 48TC 16 RTU- -Open Control Diagram...
Page 146 APPENDIX III. WIRING DIAGRAM LIST C14124 Fig. 127 - - 48TC D08- -14, E08- -14 W7220/2- -Speed IFM...
Page 147 APPENDIX III. WIRING DIAGRAM LIST C13489 Fig. 128 - - 48TC D16, E16 W7220/2- -Speed IFM Control Diagram...
Page 148 APPENDIX III. WIRING DIAGRAMS C14062 Fig. 129 - - 48TC E- -14 Control Diagram: 208/230- -3- -60:460- -3- -60;575- -3- -60...
Page 149 APPENDIX IV. MOTORMASTER SENSOR LOCATIONS SENSOR SENSOR C12154 C12155 Fig. 130 - - 48TC**04 Motormaster Sensor Location Fig. 132 - - 48TC**07 Motormaster Sensor Location SENSOR SENSOR C12156 C12157 Fig. 131 - - 48TC**05/06 Motormaster Sensor Location Fig. 133 - - 48TC**08 Motormaster Sensor Location...
Page 150: Appendix Iv. Motormaster Sensor
NOTE: Motormaster Sensor location for 48TC**14 is unavailable. Catalog No: 48TC ---4---16---01SM Copyright 2014 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Edition Date: 05/14 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Page 151: Unit Start-Up Checklist
UNIT START-UP CHECKLIST I. PRELIMINARY INFORMATION: MODEL NO.: SERIAL NO: _____________________________________ DATE: ______________ TECHNICIAN: ___________________________________ BUILDING LOCATION:____________________________ II. PRE-START-UP (insert check mark in box as each item is completed): VERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS VERIFY THAT FLUE HOOD IS INSTALLED CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS CHECK TO ENSURE NO WIRES ARE TOUCHING REFRIGERANT TUBING OR SHARP EDGES...
Page 152 Catalog No: 48TC ---4---16---01SM Copyright 2014 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Edition Date: 05/14 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. Replaces: 48TC--- 2SM & 48TC--- 3SM...

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