Carrier 48TC 17 Series Service And Maintenance Instructions
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Carrier 48TC 17 Series Service And Maintenance Instructions

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48TC**17 - 30
Nominal 15 to 27.5 Tons
with Puron® (R-410A) Refrigerant
Service and Maintenance Instructions

TABLE OF CONTENTS

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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
6
should
install,
equipment. Untrained personnel can perform the basic
8
maintenance functions of replacing filters. Trained service
10
personnel should perform all other operations.
When working on air-conditioning equipment, observe
precautions in the literature, tags and labels attached to
17
the unit, and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work
19
gloves. Use quenching cloth for unbrazing operations.
20
Have
fire
extinguishers
operations.
24
Follow all safety codes. Wear safety glasses and work
26
gloves. Use quenching cloth for brazing operations. Have
27
fire extinguisher available. Read these instructions
thoroughly and follow all warnings or cautions attached to
28
the unit. Consult local building codes and National
Electrical Code (NEC) for special requirements.
34
Recognize safety information. This is the safety−alert
35
symbol
. When you see this symbol on the unit and in
37
instructions or manuals, be aware of the potential for
physical injury hazards.
38
Understand the signal words DANGER, WARNING, and
40
CAUTION. These words are used with the safety−alert
51
symbol. DANGER identifies a hazardous situation which,
if not avoided, will result in death or severe personal
60
injury. WARNING indicates a hazardous situation which,
if not avoided, could result in death or personal injury.
62
CAUTION indicates a hazardous situation which, if not
63
avoided, could result in minor
product and property damage. NOTICE is used to address
64
practices not related to physical injury. NOTE is used to
65
highlight suggestions which will result in enhanced
installation, reliability, or operation.
75
. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . .
repair,
or
service
air-conditioning
available
for
to moderate injury or
81
94
95
all
brazing

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Summary of Contents for Carrier 48TC 17 Series

  • Page 1: Table Of Contents

    48TC**17 - 30 Nominal 15 to 27.5 Tons with Puron® (R-410A) Refrigerant Service and Maintenance Instructions TABLE OF CONTENTS APPENDIX IV. WIRING DIAGRAMS ... . APPENDIX V. MOTORMASTER SENSOR SAFETY CONSIDERATIONS .
  • Page 2 CAUTION CAUTION CUT HAZARD UNIT DAMAGE HAZARD Failure to follow this caution may result in personal Failure to follow this caution can result in reduced injury. unit performance or unit shutdown. Sheet metal parts may have sharp edges or burrs. Use High velocity water from a pressure washer, garden care and wear appropriate protective clothing, safety hose, or compressed air should never be used to clean...

  • Page 3: Unit Arrangement And Access

    UNIT ARRANGEMENT AND Seasonal Maintenance ACCESS These items should be checked at the beginning of each season (or more often if local conditions and usage General patterns dictate): Fig. 1 and Fig. 2 show general unit arrangement and Air Conditioning access locations.

  • Page 4: Supply Fan (Blower) Section

    Removing the Return Air Filters Supply Fan Assembly 1. Remove the return air filter and indoor coil access The supply fan system consists of two forward−curved panel. See Fig. 1. centrifugal blower wheels mounted on a solid blower shaft 2. Reach inside and remove filters from the filter rack. that is supported by two greasable pillow block concentric 3.
  • Page 5 1. Loosen the four motor mounting nuts that attach the motor shaft) and a movable flange side that can be rotated motor to the blower rail. around the fixed flange side that increases or reduces the pitch diameter of this driver pulley. (See Fig. 6.) 2.

  • Page 6: Staged Air Volume (Sav) Control: 2−Speed Fan With Variable Frequency Drive (Vfd)

    Bearings Unit Installation with SAV Option This fan system uses bearings featuring concentric split 48TC Rooftop—Refer to the base unit installation locking collars. The collars are tightened through a cap instructions for standard required operating and service screw bridging the split portion of the collar. The cap clearances.
  • Page 7 THIS UNIT’S MODEL NUMBER Enter Unit’s Model Number: Position: 9 10 11 12 13 14 15 16 17 18 Example: Factory Assigned Product Type Electrical Options Product Series A = None Heat Options C = Non-Fused Disconnect D = Thru-The-Base Connections Refrig.

  • Page 8: Condenser Coil Service

    25. Adjust the V-belt tension using the adjustment tool. CAUTION 26. Turn the two jack bolts clockwise, moving the motor assembly away from the blower pulley, increasing the EQUIPMENT DAMAGE HAZARD V-belt tension. Failure to follow this CAUTION can result in equipment 27.
  • Page 9 Periodic cleaning with TotalineR environmentally sound coil cleaner is essential to extend the life of coils. This cleaner available from Carrier Replacement Components Division as p/n: P902- 0301 for one-gallon C08206 (3.8L) container, and P902- 0305 for a 5-gallon (18.9L) Fig.

  • Page 10: Evaporator Coils

    1. Proper protection such as safety glasses, gloves and coil cleaner is essential to extend the life of the coils. This protective clothing are recommended during mixing cleaner is available from Carrier Replacement Parts and application. Division (p/n: P902- 0301 for one-gallon (3.8L) container, 2.

  • Page 11: Humidi−Mizerr Dehumidification System

    3. Thoroughly wet finned surfaces with clean water and the liquid header, located at the entrance to each a low velocity garden hose, being careful not to bend evaporator coil circuit path. These are non−adjustable. fins. Service requires replacing the entire liquid header assembly.
  • Page 12 Humidi−MiZerR System Components The Humidi−MiZerR system is initiated based on an input from a discrete input from a mechanical space or Humidi−MiZerR uses standard unit return air humidistat. compressor(s), evaporator coil and Round Tube−Plate Fin Humidi−MiZerR Modes (RTPF) condenser coil. Additional refrigeration system hardware includes a subcooler/reheat coil and solenoid Dehumidification Mode (Subcooling) valves.
  • Page 13 Operating Sequences both circuits. See Fig. 18, Hot Gas Reheat Schematic for system refrigerant flow. The Humidi−−MiZerR system provides three sub−modes When there is both cooling demand (thermostat Y1 of operation: Normal Cooling (see Fig. 17), Subcooling demand) and dehumidification demand, circuit 1 will Reheat1 (see Fig.
  • Page 14 RH2.x VALVE RH1.x VALVE HUMIDI-MIZER COIL CONDENSER COIL OUTDOOR AIR COMPRESSOR VALVE EVAPORATOR COIL = CLOSED VALVE = OPEN VALVE INDOOR AIR = 3-WAY VALVE C07124A Fig. 19 − Hot Gas Reheat Mode (Reheat 2) – Humidi−MiZerR System...
  • Page 15 Table 1 – Humidi−MiZerR Reheat Control Board I/O Connection Unit Point Name Type Note Pin Number Connection Humidistat/LTLO DI, 24VAC J1A - 1 (1) LTLO Thermostat W1 DI, 24VAC J1A - 2 (2) CTB - REHEAT - 4 Econ Y1 DI, 24VAC J1A - 6 (6) CTB - REHEAT - 5...
  • Page 16 Table 3 – Humidi−MiZerR Troubleshooting PROBLEM CAUSE REMEDY General cooling mode problem See Cooling Service Troubleshooting (Table 4). No dehumidification demand See No Dehumidification Demand, below. Subcooling Reheat Mode Will Not Activate CRC relay operation See CRC Relay Operation, below. Circuit RLV, CLV or LDV valve problem See CLV, RLV or LDV Valve Operation, below.

  • Page 17: Thermostatic Expansion Valve (Txv)

    410A) refrigerant, recover all refrigerant from the to the underside of the diaphragm. system. 3. The needle valve on the pin carrier is spring loaded, 3. Remove the TXV support clamp. exerting pressure on the underside of the diaphragm. Therefore, the bulb pressure equals the evaporator 4.
  • Page 18 equalizer line to the stub (previous equalizer line) in 13. Check for leaks. the suction line. 14. Evacuate the system completely and then recharge. 10. Attach the TXV bulb in the same location as the orig- 15. Remove the lockout/tagout on the main power switch inal (in the sensing bulb indent), wrap the bulb in pro- and restore power to the unit.

  • Page 19: Puronr (R−410A) Refrigerant

    PURONR (R−410A) REFRIGERANT GTAC2-5. After evacuating the system, weigh in the specified amount of refrigerant as listed on the unit's This unit is designed for use with PuronR (R−410A) rating plate. refrigerant. Do not use any other refrigerant in this system.

  • Page 20: Cooling Charging Charts

    COOLING CHARGING CHARTS COOLING CHARGING CHART 17.5 Ton - Circuit A 115F / 46.1C 185.0 105F / 40.6C 175.0 95F / 35.0C 85F / 29.4C 165.0 75F / 23.9C 65F / 18.3C 155.0 55F / 12.8C 45F / 7.2C 145.0 135.0 125.0 115.0...
  • Page 21 COOLING CHARGING CHARTS (cont) COOLING CHARGING CHART 20 Ton - Circuit A 115F / 46.1C 185.0 105F / 40.6C 175.0 95F / 35.0C 85F / 29.4C 165.0 75F / 23.9C 65F / 18.3C 155.0 55F / 12.8C 45F / 7.2C 145.0 135.0 125.0...
  • Page 22 COOLING CHARGING CHARTS (cont) C12231A Fig. 27 − Cooling Charging Chart − 20 Ton (Circuit A) C12232A Fig. 28 − Cooling Charging Chart − 20 Ton (Circuit B)
  • Page 23 COOLING CHARGING CHARTS (cont) C12233A Fig. 29 − Cooling Charging Chart − 25 Ton (Circuit A) C12234A Fig. 30 − Cooling Charging Chart − 25 Ton (Circuit B)

  • Page 24: Compressors

    COMPRESSORS CAUTION Lubrication UNIT DAMAGE HAZARD The compressor is charged with the correct amount of oil Failure to follow this caution may result in damage to at the factory. components. The compressor is in a PuronR refrigerant system and WARNING uses a polyolester (POE) oil.
  • Page 25 1. Using a PuronR (R410) gauge set, recover all refrig­ erant from the system. 2. Use a tubing cutter to remove the filter drier from the line. NOTE: Do Not use a torch to remove the old filter drier. The heat from the torch will allow contaminants into the air and into the open refrigeration system.

  • Page 26: Troubleshooting The Cooling System

    TROUBLESHOOTING THE COOLING SYSTEM Refer to Table 4 for additional troubleshooting topics. Table 4 – Cooling Service 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 Replace defective component.

  • Page 27: 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 may 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 28: Smoke Detectors

    The primary leads to the convenience outlet transformer GFCI RECEPTACLE NOT INCLUDED COVER - WHILE-IN-USE are not factory−connected. Selection of primary power WEATHERPROOF source is a customer−option. If local codes permit, the transformer primary leads can be connected at the line−side terminals unit−mounted...
  • Page 29 wiring terminals. The controller has three LEDs: Power, from a fire, causes the sensor to signal an alarm state but Trouble and Alarm. A manual test/reset button is located dust and debris accumulated over time does not. on the cover face. Duct Smoke Sensor Duct Smoke Sensor Controller...
  • Page 30 Return Air without Economizer FIOP Smoke Detector Wiring and Response The sampling tube is located across the return air opening All units: The FIOP smoke detector is configured to on the unit basepan. See Fig. 38. The holes in the automatically shut down all unit operations when a smoke sampling tube face downward, into the return air stream.
  • Page 31 RETURN AIR SENSOR (Operating Position Shown) CONTROLLER MODULE SCREWS (2) SAMPLE TUBE C12050 Fig. 39 − Return Air Sampling Tube Location in Unit with Economizer 48TM502525 C12559 Fig. 40 − Typical Smoke Detector System Wiring...
  • Page 32 Sensor and Controller Tests NOTICE Sensor Alarm Test OPERATIONAL TEST NOTICE The sensor alarm test checks a sensor’s ability to signal an alarm state. This test requires that you use a field provided Failure to follow this NOTICE may result in an unnecessary evacuation of the facility.
  • Page 33 Changing the Dirt Sensor Test By default, sensor dirty test results are indicated by: S The sensor’s Dirty LED flashing. S The controller’s Trouble LED flashing. S The controller’s supervision relay contacts toggle. The operation of a sensor’s dirty test can be changed so that the controller’s supervision relay is not used to indicate test results.

  • Page 34: Indicators

    Alarm State NOTICE The smoke detector enters the alarm state when the amount of smoke particulate in the sensor’s sensing OPERATIONAL TEST NOTICE chamber exceeds the alarm threshold value. (See Table 6.) Failure to follow this NOTICE can result in an Upon entering the alarm state: unnecessary evacuation of the facility.

  • Page 35: Protective Devices

    Table 6 – Detector Indicators CONTROL OR INDICATOR DESCRIPTION Resets the sensor when it is in the alarm or trouble state. Activates or tests the sensor when it is in Magnetic test/reset switch the normal state. Alarm LED Indicates the sensor is in the alarm state. Trouble LED Indicates the sensor is in the trouble state.
  • Page 36 Supply (Indoor) Fan Motor Protection Troubleshooting Supply Fan Motor Overload Trips WARNING The supply fan used in 48TC units is a forward−curved centrifugal wheel. At a constant wheel speed, this wheel PERSONAL INJURY HAZARD has a characteristic that causes the fan shaft load to Failure to follow this WARNING can result in DECREASE when the static pressure in the unit−duct personal injury.

  • Page 37: Premierlink™ Control

    The PremierLinkt controller (see Fig. 44) is compatible The PremierLinkt control is factory−mounted in the with Carrier Comfort Networkr (CCN) devices. This 48TC unit’s main control box to the left of the LCTB. control is designed to allow users the access and ability to Factory wiring is completed through harnesses connected change factory−defined settings, thus expanding the...

  • Page 38: Rtu−Open Control System

    The RTU (Roof Top Unit) Open controller is an integrated installation refer to base unit installation instructions and component of the Carrier rooftop unit. Its internal the unit’s wiring diagrams. application programming provides optimum performance WARNING and energy efficiency.
  • Page 39 C10818 Fig. 45 − RTU−OPEN Control Module...

  • Page 40: Gas Heating System

    GAS HEATING SYSTEM Fuel Types and Pressures Natural Gas General The 48TC unit is factory−equipped for use with Natural The heat exchanger system consists of a gas valve feeding Gas fuel at elevation under 2000 ft (610 m). See section multiple inshot burners off a manifold.
  • Page 41 Ignition Fault (5 flashes) lockout. Reset of the low This switch also prevents operation when the propane tank pressure switch is automatic on rise in supply line level is low which can result in gas with a high pressure. Reset of the IGC requires a recycle of unit concentration of impurities, additives, and residues that power after the low pressure switch has closed.
  • Page 42 HEATER TUBE ASSEMBLY SEAL STRIPS (SPONGE RUBBER) REGULATOR GASKET REGULATOR RETAINER WIND CAP ASSEMBLY (SHOWN INVERTED AS SHIPPED) SUPPORT INSULATION ASSEMBLY VESTIBULE PLATE INDUCER FAN MOTOR ASSEMBLY BURNER ASSEMBLY GAS VALVE C08227 Fig. 51 − Typical Heat Exchanger Assembly Burners and Igniters Orifice Projection Refer to Fig.
  • Page 43 8. Slide the burner tray out of the unit (Fig. 54). WARNING 9. To reinstall, reverse the procedure outlined above. PERSONAL INJURY HAZARD Cleaning and Adjustment Failure to follow this WARNING can result in 1. Remove the burner rack from the unit as described in personal injury.
  • Page 44 IGC Board IGC Board C10337 Fig. 55 − Unit Control Box/IGC Location Gas Valve Adjusting Gas Valve Pressure Settings All unit sizesare equipped with 2−stage gas valves. See IMPORTANT: Leak check (using a mixture of soapy Fig. 56 for locations of adjustment screws and features. water or leak detection fluid) all gas connections including the main service connection, gas valve, gas REGULATOR...
  • Page 45 When replacing unit contains a self−diagnostic LED (light−emitting diode). A orifices, order the necessary parts through the Carrier single LED (see Fig. 59) on the IGC provides a visual Replacement Components Division (RCD). See Table 13 display of operational or sequential problems when the for available orifice sizes.
  • Page 46 Table 13 – Orifice Sizes ORIFICE DRILL SIZE CARRIER PART NMBR DRILL 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 47 Red LED-Status C08452 Fig. 59 − Integrated Gas Control (IGC) Board Table 14 – 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 48 Table 15 – Altitude Compensation* (17 − 30) – Natural Gas NATURAL GAS NOMINAL HEAT INPUT ELEVATION 220k BTUH 310k BTUH 400k BTUH Orifice Input Orifice Input Orifice Input Feet Meters Size (btu/hr) Size (btu/hr) Size (btu/hr) 0 - 2000 0-610 220,000 310,000...
  • Page 49 Minimum heating entering air temperature initiated using low entering air temperatures with insufficient heating temperature rise. When operating on first stage heating, the minimum temperature of air entering the dimpled heat exchanger is Thermostat LCTB 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)
  • Page 50 Table 18 – 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 51: Economi$Er Systems

    ECONOMI$ER SYSTEMS ECONOMIER IV CONTROLLER IMPORTANT: economizer that meets OUTSIDE AIR WIRING TEMPERATURE SENSOR economizer requirements as laid out in California’s Title HARNESS LOW AMBIENT mandatory section 120.2 (fault detection and SENSOR ACTUATOR diagnostics) and/or prescriptive section 140.4 (life−cycle tests, damper leakage, 5 year warranty, sensor accuracy, etc), will have a label on the economizer.
  • Page 52 BLACK TRANSFORMER GROUND BLUE 500 OHM RESISTOR VIOLET NOTE 1 PINK OAT SENSOR 24 VAC NOTE 3 50HJ540573 ACTUATOR ASSEMBLY 4-20 mA WHITE DIRECT DRIVE TO J9 ON 4-20mA SIGNAL ACTUATOR PremierLink BOARD ECONOMISER2 PLUG NOTES: 1. Switch on actuator must be in run position for economizer to operate. 2.
  • Page 53 C06053 Fig. 64 − EconoMi$er IV Functional View EconoMi$er IV Standard Sensors SUPPLY AIR TEMPERATURE Table 19 provides a summary of the EconoMi$er IV SENSOR MOUNTING LOCATION Input/Output logic. A functional view of the EconoMi$er is shown in Fig. 64. Typical settings, sensor ranges, and SUPPLY AIR jumper positions are also shown.
  • Page 54 Outdoor Dry Bulb Changeover The standard controller is shipped from the factory configured for outdoor dry bulb changeover control. The outdoor air and supply air temperature sensors are included as standard. For this control mode, the outdoor temperature is compared to an adjustable setpoint selected on the control.
  • Page 55 (29) (32) (3 ) (3 ) (41) (43) CONTROL CONTROL POINT CURVE APPROX. deg. F (deg. C) AT 50% RH (27) 73 (23) 7 (21) 7 (19) 3 (17) (24) (21) (1 ) (1 ) (13) (1 ) HIGH LIMIT CURVE (1 ) (13)
  • Page 56 adjustments with at least 10_F temperature difference between the outdoor and return-air temperatures. CO SENSOR MAX RANGE SETTING To determine the minimum position setting, perform the 6000 following procedure: 5000 1. Calculate the appropriate mixed air temperature using the following formula: 4000 800 ppm ) + (TR...
  • Page 57 Occupancy Control the maximum ventilation rate of 20% (or base plus 15 cfm per person). Use Fig. 72 to determine the maximum The factory default configuration for the EconoMi$er IV setting of the CO sensor. For example, an 1100 ppm control is occupied mode.
  • Page 58 The custom settings of the CO sensor can be changed 4. Remove 620−ohm resistor across SO and +. The Free anytime after the sensor is energized. Follow the steps Cool LED should turn off. below to change the non-standard settings: 5.
  • Page 59 7. Remove the jumper from TR and N. The actuator should drive fully closed. 8. Return EconoMi$er IV settings and wiring to normal after completing troubleshooting. Supply−Air Sensor Input To check supply−air sensor input: 1. Make sure EconoMi$er IV preparation procedure has been performed.

  • Page 60: Pre−Start−Up/Start−Up

    PRE−START−UP/START−UP 3. Make the following inspections: a. Inspect for shipping and handling damages such WARNING as broken lines, loose parts, or disconnected wires, etc. b. Inspect for oil at all refrigerant tubing connec- PERSONAL INJURY HAZARD tions and on unit base. Detecting oil generally Failure to follow this warning could result in personal indicates a refrigerant leak.
  • Page 61 Gas Piping Refrigerant Service Ports Each unit system has two 1/4” SAE flare (with check Check gas piping for leaks. valves) service ports: one on the suction line, and one on the compressor discharge line. Be sure that caps on the WARNING ports are tight.

  • Page 62: Start−Up, Premierlink] Controls

    45 seconds. The Integrated Gas Unit During start−up, the Carrier software can also be used to Controller (IGC) modifies this value when abnormal limit verify communication with PremierLinkt controller.

  • Page 63: Start−Up, Rtu−Open Controls

    START−UP, RTU−OPEN CONTROLS NOTICE SET−UP INSTRUCTIONS Refer to the following manuals for additional installation, wiring and troubleshooting information for the RTU−OPEN Controller.: “Controls, Start−up, Operation and Troubleshooting Instructions,” “RTU Open Installation Start−up Guide” “RTU−Open Integration Guide”. Have a copy of these manuals available at unit start−up.

  • Page 64: Appendix I. Model No. Nomenclature

    APPENDIX I. MODEL NUMBER NOMENCLATURE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Unit Heat Type Packaging and Seismic Complaince 48 = Gas Heat 0 = Standard Packaged Rooftop 3 = California Seismic Complaint Tier Model Electrical Options TC = Standard Efficiency...

  • Page 65: Appendix Ii. Physical Data

    APPENDIX II. PHYSICAL DATA Table 22 – PHYSICAL DATA − VERTICAL (COOLING) 15 − 27.5 TONS RTPF − ROUND TUBE/PLATE FIN COIL DESIGN 48TC*D17 48TC*E17 48TC*D20 48TC*E20 Refrigeration System RTPF RTPF RTPF RTPF # Circuits / # Comp. / Type 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll...
  • Page 66 APPENDIX II. PHYSICAL DATA (cont) Table 22 (cont) − PHYSICAL DATA − VERTICAL (COOLING) 15 − 27.5 TONS RTPF − ROUND TUBE/PLATE FIN COIL DESIGN 48TC*D24 48TC*E24 48TC*D28 48TC*E28 48TC*D30 Refrigeration System RTPF RTPF RTPF RTPF RTPF # Circuits / # Comp. / Type 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll...
  • Page 67 APPENDIX II. PHYSICAL DATA (cont) Table 22 (cont) − PHYSICAL DATA − VERTICAL (COOLING) 15 − 27.5 TONS RTPF − ROUND TUBE/PLATE FIN COIL DESIGN 48TC*D17 48TC*E17 48TC*D20 48TC*E20 48TC*D24 48TC*E24 48TC*D28 48TC*E28 48TC*D30 Cond. Coil (Circuit A) Coil type RTPF RTPF RTPF...
  • Page 68 APPENDIX II. PHYSICAL DATA (cont) Table 23 – PHYSICAL DATA − VERTICAL (COOLING) 15 − 27.5 TONS NOVATION − ALL ALUMINUM COIL DESIGN 48TC-D17 48TC-D20 48TC-D24 48TC-D28 Refrigeration System MCHX MCHX MCHX MCHX # Circuits / # Comp. / Type 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll...
  • Page 69 APPENDIX II. PHYSICAL DATA (cont) Table 23 (cont) − PHYSICAL DATA − VERTICAL (COOLING) 15 − 27.5 TONS NOVATION − ALL ALUMINUM COIL DESIGN 48TC-D17 48TC-D20 48TC-D24 48TC-D28 Cond. Coil (Circuit A) Coil type Novation Novation Novation Novation Coil Length (in) Coil Height (in) Number of Passes l 1 / 20.3...
  • Page 70 APPENDIX II. PHYSICAL DATA (cont) Table 24 – PHYSICAL DATA − HORIZONTAL (COOLING) 15 − 25 TONS RTPF − Round Tube/Plate Fin Coil Design 48TC*D18 48TC*E18 48TC*D21 48TC*E21 Refrigeration System # Circuits / # Comp. / Type 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll...
  • Page 71 APPENDIX II. PHYSICAL DATA (cont) TABLE 24 (cont) − PHYSICAL DATA − HORIZONTAL (COOLING) 15 − 25 TONS RTPF − Round Tube/Plate Fin Coil Design 48TC*D25 48TC*E25 48TC*D29 48TC*E29 Refrigeration System # Circuits / # Comp. / Type 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll...
  • Page 72 APPENDIX II. PHYSICAL DATA (cont) TABLE 24 (cont) − PHYSICAL DATA − HORIZONTAL (COOLING) 15 − 25 TONS RTPF − Round Tube/Plate Fin Coil Design 48TC*D18 48TC*E18 48TC*D21 48TC*E21 48TC*D25 48TC*E25 48TC*D29 48TC*E29 Cond. Coil (Circuit A) Coil type RTPF RTPF RTPF RTPF...
  • Page 73 APPENDIX II. PHYSICAL DATA (cont) Table 25 – PHYSICAL DATA − VERTICAL (HEATING) 15 − 27.5 TONS 48TC**17 48TC**20 48TC**24 48TC**28 48TC**30 Gas Connection 5 -13 / 5 -13 / 5 -13 / 5 -13 / 5 -13 / 0.18-0.47 0.18-0.47 0.18-0.47 0.18-0.47...
  • Page 74 APPENDIX II. PHYSICAL DATA (cont) Table 26 – PHYSICAL DATA − HORIZONTAL (HEATING) 15 − 25 TONS 48TC**18 48TC**21 48TC**25 48TC**29 Gas Connection # of Gas Valves Nat. gas supply line press (in. w.g.) / (PSIG) 5 -13 / 0.18-0.47 5 -13 / 0.18-0.47 5 -13 / 0.18-0.47 5 -13 / 0.18-0.47...

  • Page 75: Appendix Iii. Fan Performance

    APPENDIX III. FAN PERFORMANCE Table 27 – 48TC*D17 VERTICAL SUPPLY / RETURN 15 TON Available External Static Pressure (in. wg) 4500 0.77 1.09 1.43 1.80 2.19 4900 0.93 1.27 1.64 2.03 2.44 5250 1.10 1.45 1.84 2.24 2.67 5650 1.32 1.68 2.09 2.51...
  • Page 76 APPENDIX III. FAN PERFORMANCE (cont) Table 29 – 48TC*D24 VERTICAL SUPPLY / RETURN 20 TON Available External Static Pressure (in. wg) 6000 1.53 1.84 2.16 2.49 2.83 6500 1.88 2.22 2.56 2.92 3.28 7000 2.29 2.65 3.02 3.40 3.78 7500 2.76 3.15 3.54...
  • Page 77 APPENDIX III. FAN PERFORMANCE (cont) Table 31 – 48TC*D30 VERTICAL SUPPLY / RETURN 27.5 TON Available External Static Pressure (in. wg) 8250 2.86 3.28 3.72 4.16 1010 4.60 8950 3.57 4.03 4.50 1008 4.97 1055 5.45 9650 4.39 4.89 1009 5.39 1057 5.89...
  • Page 78 APPENDIX III. FAN PERFORMANCE (cont) Table 32 – 48TC*D18 HORIZONTAL SUPPLY / RETURN 15 TON Available External Static Pressure (in. wg) 4500 1.25 1.76 2.31 2.89 3.51 4900 1.51 2.05 2.64 3.26 3.91 5250 1.78 2.35 2.96 3.61 4.29 5650 2.13 2.73 3.37...
  • Page 79 APPENDIX III. FAN PERFORMANCE (cont) Table 34 – 48TC*D25 HORIZONTAL SUPPLY / RETURN 20 TON Available External Static Pressure (in. wg) 6000 1.92 2.44 2.98 3.53 4.10 6500 2.34 2.90 3.48 4.07 4.67 7000 2.83 3.43 4.05 4.67 5.31 7500 3.39 4.03 4.68...
  • Page 80 APPENDIX III. FAN PERFORMANCE (cont) Table 36 – Pulley Adjustment − Vertical Fan RPM at Motor Pulley Settings Motor Pulley Turns Open MODEL Motor/Drive Combo SIZE Standard Static Medium Static Phase High Static 1009 Standard Static Medium Static Phase High Static 1078 1058 1039...

  • Page 81: Appendix Iv. Wiring Diagrams

    APPENDIX IV. WIRING DIAGRAMS Table 38 – Wiring Diagrams 48TC−D17 / 48TC−D28 UNITS DUAL CIRCUIT HUMIDI-MIZER[ SIZE VOLTAGE CONTROL POWER CONTROL POWER 208/230-3-60 50HE500751-J 50HE500889-I 50HE502181-E 50HE502186-B 460-3-60 50HE500751-J 50HE500752-I 50HE502181-E 50HE502183-C 575-3-60 50HE500751-J 50HE500888-I 50HE502181-E 50HE502184-C 208/230-3-60 50HE500751-J 50HE500889-I 50HE502181-E 50HE502186-B 460-3-60...
  • Page 82 APPENDIX IV. WIRING DIAGRAMS (cont) C12615 Fig. 73 − 48TC D17 − D28 Control Diagram − 208/230−3−60; 460/575−3−60...
  • Page 83 APPENDIX IV. WIRING DIAGRAMS (cont) C12616 Fig. 74 − 48TC D17 − D28 Power Diagram − 208/230−3−60...
  • Page 84 APPENDIX IV. WIRING DIAGRAMS (cont) C12266 Fig. 75 − 48TC D17 − D28 Power Diagram − 460−3−60...
  • Page 85 APPENDIX IV. WIRING DIAGRAMS (cont) C12618 Fig. 76 − 48TC D17 − D28 Power Diagram − 575−3−60...
  • Page 86 APPENDIX IV. WIRING DIAGRAMS (cont) C14061 Fig. 77 − 48TC D17 − D28 Control Diagram with Humidi−MiZer®...
  • Page 87 APPENDIX IV. WIRING DIAGRAMS (cont) C12620 Fig. 78 − 48TC D17 − D28 Power Diagram 208/230−3−60 with Humidi−MiZer®...
  • Page 88 APPENDIX IV. WIRING DIAGRAMS (cont) C12621 Fig. 79 − 48TC D17 − D28 Power Diagram 460−3−60 with Humidi−MiZer®...
  • Page 89 APPENDIX IV. WIRING DIAGRAMS (cont) C12622 Fig. 80 − 48TC D17 − D28 Power Diagram 575−3−60 with Humidi−MiZer®...
  • Page 90 APPENDIX IV. WIRING DIAGRAMS (cont) 50HE500751 J 50HE500891 F C12263 Fig. 81 − PremierLinkt System Control Wiring Diagram...
  • Page 91 APPENDIX IV. WIRING DIAGRAMS (cont) C13766 Fig. 82 − PremierLinkt System Control Wiring Diagram with Humidi−MiZer®...
  • Page 92 APPENDIX IV. WIRING DIAGRAMS (cont) C13767 Fig. 83 − RTU−OPEN Wiring Diagram...
  • Page 93 APPENDIX IV. WIRING DIAGRAMS (cont) C13768 Fig. 84 − RTU−OPEN Wiring Diagram with Humidi−MiZer®...

  • Page 94: Appendix V. Motormaster Sensor Locations

    LOCATION C12259 Fig. 86 − Motormaster Sensor Location − D28 Copyright 2015 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Catalog No: 48TC-17-30-01SM Edition Date: 12/15 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

  • Page 95: Unit Start-Up Checklist

    UNIT START-UP CHECKLIST I. PRELIMINARY INFORMATION: MODEL NO.: SERIAL NO: _____________________________________ DATE: ______________ TECHNICIAN: ___________________________________ II. PRE-START-UP (insert check mark in box as each item is completed): VERIFY THAT JOBSITE VOLTAGE AGREES WITH VOLTAGE LISTED ON RATING PLATE VERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS VERIFY THAT FLUE HOOD IS INSTALLED...
  • Page 96 Copyright 2015 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Catalog No: 48TC-17-30-01SM Edition Date: 12/15 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. Replaces: 48TC-04SM...

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