Carrier WeatherMaster 48HC04 Service And Maintenance Instructions
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Carrier WeatherMaster 48HC04 Service And Maintenance Instructions

Single package rooftop gas heat/electric cooling unit with puron (r-410a) refrigerant
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See also: Instruction and Installation Manual
Service and Maintenance Instructions
CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . 2
UNIT ARRANGEMENT AND ACCESS. . . . . . . . . . . . . 3
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Seasonal Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . 3
RETURN AIR FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . 3
Outside Air Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Economizer Inlet Air Screen . . . . . . . . . . . . . . . . . . . . 4
Manual Outside Air Hood Screen . . . . . . . . . . . . . . . . 4
SUPPLY FAN (BLOWER) SECTION . . . . . . . . . . . . . . 4
Supply Fan (Direct-Drive) . . . . . . . . . . . . . . . . . . . . . . 4
Supply Fan (Belt-Drive) . . . . . . . . . . . . . . . . . . . . . . . . 6
Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Identifying Factory Option . . . . . . . . . . . . . . . . . . . . . 7
Unit Installation with SAV Option . . . . . . . . . . . . . . . . 8
MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Replacing the Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Changing Fan Wheel Speed . . . . . . . . . . . . . . . . . . . . 9
REMOTE VFD KEYPAD REFERENCE . . . . . . . . . . . . 9
COOLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Condenser Coil. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Recommendation. . . . . . . . . . . . . . . . . . . . . . . . . . 12
Evaporator Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
TXV Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Replacing TXV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
PURON® (R-410A) REFRIGERANT. . . . . . . . . . . . . . 15
Refrigerant Charge. . . . . . . . . . . . . . . . . . . . . . . . . . . 15
COOLING CHARGING CHARTS . . . . . . . . . . . . . . . . 15
COMPRESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Replacing Compressor . . . . . . . . . . . . . . . . . . . . . . . 18
Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . . . 18
Filter Drier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Condenser-Fan Adjustment . . . . . . . . . . . . . . . . . . . 18
CONVENIENCE OUTLETS . . . . . . . . . . . . . . . . . . . . . 20
SMOKE DETECTORS . . . . . . . . . . . . . . . . . . . . . . . . . 21
System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480156-01
Single Package Rooftop Gas Heat/Electric Cooling Unit
Printed in U.S.A.
Form 48HC-4-14-03SM Rev. C
with Puron
®
Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
Smoke Detector Sensor . . . . . . . . . . . . . . . . . . . . . . .21
Smoke Detector Locations. . . . . . . . . . . . . . . . . . . . .22
Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
SENSOR AND CONTROLLER TESTS . . . . . . . . . . . .24
Sensor Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Controller Alarm Test . . . . . . . . . . . . . . . . . . . . . . . . .24
Dirty Controller Test . . . . . . . . . . . . . . . . . . . . . . . . . .24
Dirty Sensor Test . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Dirty Sensor Test Procedure . . . . . . . . . . . . . . . . . . .25
Changing the Dirt Sensor Test . . . . . . . . . . . . . . . . .25
Remote Station Test . . . . . . . . . . . . . . . . . . . . . . . . . .25
Dirty Sensor Test Using an SD-TRK4 . . . . . . . . . . . .26
Detector Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
PROTECTIVE DEVICES . . . . . . . . . . . . . . . . . . . . . . .27
Compressor Protection . . . . . . . . . . . . . . . . . . . . . . .27
Relief Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Control Circuit, 24-V . . . . . . . . . . . . . . . . . . . . . . . . . .27
GAS HEATING SYSTEM . . . . . . . . . . . . . . . . . . . . . . .28
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Fuel Types and Pressures . . . . . . . . . . . . . . . . . . . . .28
Flue Gas Passageways . . . . . . . . . . . . . . . . . . . . . . .29
Combustion-Air Blower . . . . . . . . . . . . . . . . . . . . . . .29
Burners and Igniters. . . . . . . . . . . . . . . . . . . . . . . . . .31
Removing the Heat Exchanger . . . . . . . . . . . . . . . . .32
Burner Ignition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Orifice Replacement . . . . . . . . . . . . . . . . . . . . . . . . . .33
Troubleshooting Heating System . . . . . . . . . . . . . . .42
PremierLink™ Control . . . . . . . . . . . . . . . . . . . . . . . .43
RTU Open Control System. . . . . . . . . . . . . . . . . . . . .43
ECONOMIZER SYSTEMS . . . . . . . . . . . . . . . . . . . . . .43
EconoMi$er IV Standard Sensors . . . . . . . . . . . . . . .49
EconoMi$er IV Control Modes . . . . . . . . . . . . . . . . . .49
EconoMi$er IV Preparation . . . . . . . . . . . . . . . . . . . .53
Differential Enthalpy . . . . . . . . . . . . . . . . . . . . . . . . . .53
Single Enthalpy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
DCV Minimum and Maximum Position . . . . . . . . . . .53
Supply-Air Sensor Input. . . . . . . . . . . . . . . . . . . . . . .53
EconoMi$er® X (Factory Option) . . . . . . . . . . . . . . .54
PRE-START-UP/START-UP . . . . . . . . . . . . . . . . . . . .68
Pg 1
WeatherMaster
48HC04-14
(R-410A) Refrigerant
10-19
Replaces: 48HC-4-14-02SM
®

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  • Page 1: Table Of Contents

    ® WeatherMaster 48HC04-14 Single Package Rooftop Gas Heat/Electric Cooling Unit with Puron ® (R-410A) Refrigerant Service and Maintenance Instructions CONTENTS Controller........21 Smoke Detector Sensor .

  • Page 2: Safety Considerations

    START-UP, GENERAL ......68 Unit Preparation ......68 WARNING Additional Installation/Inspection .

  • Page 3: Unit Arrangement And Access

    • Condenser coil cleanliness checked • Condensate drain checked IMPORTANT: OPERATIONAL TEST ALERT Seasonal Maintenance Failure to follow this ALERT can result in an unnecessary These items should be checked at the beginning of each season (or evacuation of the facility. more often if local conditions and usage patterns dictate).

  • Page 4: Outside Air Hood

    To re-install the access panel: To remove the screen, loosen the screws in the top retainer and slip the retainer up until the filter can be removed. Re-install by plac- Slide the top of the panel up under the unit top panel. ing the frame in its track, rotating the retainer back down, and Slide the bottom into the side channels.
  • Page 5 design, the electronic circuitry is integral to the motor assembly Table 1 — Motor Tap Programing (Percent of and cannot be serviced or replaced separately. Full-Load Torque) The 208/230-v units use a 230-v motor. 460-v units use a 230-v motor with a stepdown transformer (mounted on the end of the fan 48HC TAP 1 TAP 2...

  • Page 6: Supply Fan (Belt-Drive)

    TROUBLESHOOTING THE ECM MOTOR BLOWER PULLEY Troubleshooting the X13 ECM requires a voltmeter. Disconnect main power to the unit. V--- BELT Remove the motor power plug (including the control BRN lead) and VIO control signal lead at the motor terminals. MOTOR PULLEY Restore main unit power.

  • Page 7: Staged Air Volume Control - 2 Speed Fan With Variable Frequency Drive (Vfd)

    Remove the belt by gently lifting the old belt over one of Set movable flange at nearest keyway of pulley hub. the pulleys. Tighten setscrew and torque to 65 to 70 in.-lb (7.4 to Install the new belt by gently sliding the belt over both 7.9 Nm).

  • Page 8: Unit Installation With Sav Option

    Table 3 — Model-Size / VFD Option Indicator POSITION IN MODEL VFD FIOP MODEL / SIZES NUMBER INDICATOR 48HC / 07-14 G, J NOTE: See Appendix A for an example of Model Number Nomenclature. Unit Installation with SAV Option 48HC ROOFTOP Refer to the base unit installation instructions for standard required operating and service clearances.

  • Page 9: Changing Fan Wheel Speed

    23. Install motor drive V-belt to motor pulley and blower wheel pulley. See the CAUTION above. CAUTION 24. Align the motor pulley and blower wheel pulley using a EQUIPMENT DAMAGE HAZARD straight edge. See Fig. 10. Failure to follow this CAUTION can result in premature wear 25.

  • Page 12: Cooling

    Avoid use of: COOLING • coil brighteners • acid cleaning prior to painting WARNING • high pressure washers UNIT OPERATION AND SAFETY HAZARD • poor quality water for cleaning Failure to follow this warning could cause personal injury, Totaline environmentally sound coil cleaner is nonflammable, hy- death and/or equipment damage.

  • Page 13: Evaporator Coil

    TOTALINE ENVIRONMENTALLY SOUND COIL CLEANER APPLICATION INSTRUCTIONS Proper eye protection such as safety glasses is recom- mended during mixing and application. Remove all surface loaded fibers and dirt with a vacuum cleaner as described above. Thoroughly wet all finned surfaces with clean water and a low velocity garden hose, being careful not to bend fins.

  • Page 14: Replacing Txv

    downward on the diaphragm, which opens the valve using the Refrigerant System Pressure Access Ports push rods. There are two access ports in the system: on the suction tube The suction pressure at the outlet of the evaporator coil is near the compressor and on the discharge tube near the compres- transferred through the external equalizer tube to the sor.

  • Page 15: Puron® (R-410A) Refrigerant

    Remove charge if below the curve Amount of refrigerant charge is listed on the unit’s nameplate. Re- fer to Carrier GTAC2-5 Charging, Recovery, Recycling and Rec- lamation training manual and the following procedures. Unit panels must be in place when unit is operating during the charging procedure.
  • Page 16 2-Stage 6 Ton Charging Chart R-410A Refrigerant CHARGING CHART – R-410A REFRIGERANT (Cooling Mode - Compressor at Full Load COOLING MODE – OUTDOOR FAN MUST BE RUNNING and Outdoor Fans at High Speed) Add Charge if Above the Curve Add charge if above the curve Remove Charge if Below the Curve Remove charge if below the curve...
  • Page 17 CHARGING CHART – R-410A REFRIGERANT CHARGING CHART – R-410A REFRIGERANT COOLING MODE – ALL OUTDOOR FANS MUST BE RUNNING COOLING MODE – CIRCUIT A & B Add charge if above the curve Add charge if above the curve Remove charge if below the curve Remove charge if below the curve Compressor Discharge Pressure (psig) 48TM502682...

  • Page 18: Compressor

    COMPRESSOR Compressor Rotation Lubrication CAUTION The compressor is charged with the correct amount of oil at the factory. EQUIPMENT DAMAGE HAZARD Failure to follow this caution can result in premature wear and damage to equipment. CAUTION Scroll compressors can only compress refrigerant if rotat- UNIT DAMAGE HAZARD ing in the right direction.
  • Page 19 Fig. 31 — Typical Piping Schematic (Dual Circuit Unit Shown)

  • Page 20: Convenience Outlets

    Loosen the two screws at the GFCI duplex outlet, until CONVENIENCE OUTLETS approximately -in. (13 mm) under screw heads are exposed. WARNING Press the gasket over the screw heads. Slip the backing plate over the screw heads at the keyhole slots and align ELECTRICAL OPERATION HAZARD with the gasket;...

  • Page 21: Smoke Detectors

    SMOKE DETECTORS Smoke detectors are available as factory-installed options on 48HC models. Smoke detectors may be specified for supply air only, for return air without or with economizer, or in combina- tion of supply air and return air. Return air smoke detectors are arranged for vertical return configurations only.

  • Page 22: Smoke Detector Locations

    Air is introduced to the duct smoke detector sensor’s sensing chamber through a sampling tube that extends into the HVAC duct and is directed back into the ventilation system through a (shorter) exhaust tube. The difference in air pressure between the two tubes pulls the sam- pled air through the sensing chamber.

  • Page 23: Completing Installation Of Return Air Smoke

    RETURN AIR SENSOR (Operating Position Shown) CONTROLLER MODULE SCREWS (2) RETURN AIR SAMPLING TUBE SAMPLE TUBE Fig. 39 — Return Air Sampling Tube Location (View reoriented to show opposite side for clarity) Fig. 41 — Return Air Sensor Operating Position Completing Installation of Return Air Smoke FIOP Smoke Detector Wiring and Response Detector...

  • Page 24: Sensor And Controller Tests

    Fig. 42 — Typical Smoke Detector System Wiring ADDITIONAL APPLICATION DATA Refer to Factory-Installed Smoke Detectors for Small and Medi- IMPORTANT: OPERATIONAL TEST ALERT um Rooftop Units 2 to 25 Tons for discussions on additional con- trol features of these smoke detectors including multiple unit coor- Failure to follow this ALERT can result in an unnecessary dination.

  • Page 25: Dirty Sensor Test

    Dirty Sensor Test The dirty sensor test provides an indication of the sensor’s ability IMPORTANT: OPERATIONAL TEST ALERT to compensate for gradual environmental changes. A sensor that can no longer compensate for environmental changes is consid- Failure to follow this ALERT can result in an unnecessary ered 100% dirty and requires cleaning or replacing.

  • Page 26: Dirty Sensor Test Using An Sd-Trk4

    Indicators IMPORTANT: OPERATIONAL TEST ALERT NORMAL STATE The smoke detector operates in the normal state in the absence of Failure to follow this ALERT can result in an unnecessary any trouble conditions and when its sensing chamber is free of evacuation of the facility.

  • Page 27: Troubleshooting

    RESETTING ALARM AND TROUBLE CONDITION TRIPS PROTECTIVE DEVICES Manual reset is required to restore smoke detector systems to Nor- Compressor Protection mal operation. For installations using two sensors, the duct smoke detector does not differentiate which sensor signals an alarm or OVERCURRENT trouble condition.

  • Page 28: Gas Heating System

    GAS HEATING SYSTEM Table 8 — Natural Gas Supply Line Pressure Ranges General UNIT UNIT The heat exchanger system consists of a gas valve feeding multi- MODEL SIZE ple in-shot burners off a manifold. The burners fire into matching 48HC 4.0 in.

  • Page 29: Flue Gas Passageways

    exchanger system. Contact your fuel supplier if this condition is suspected. Flue Gas Passageways To inspect the flue collector box and upper areas of the heat exchanger: Remove the combustion blower wheel and motor assem- bly according to directions in Combustion-Air Blower sec- tion.
  • Page 30 HEATER TUBE ASSEMBLY SEAL STRIPS, SPONGE RUBBER REGULATOR GASKET REGULATOR BAFFLE ASSEMBLY (LOW NO x ONLY) RETAINER FLUE COVER ASSEMBLY PRESSURE SWITCH HOSE CONNECTION VESTIBULE PLATE FLUE BAFFLE (LOW NO x ONLY) INDUCER FAN-MOTOR ASSEMBLY BURNER ASSEMBLY Fig. 50 — Heat Exchanger Assembly...

  • Page 31: Burners And Igniters

    HEAT EXCHANGER SUPPORT RACK HEAT EXCHANGER COVER PANEL BURNER UNIT PARTITION CENTER PANEL POST Fig. 51 — Heat Exchanger Access - Internal Panels, Center Post, and HX Rack Locations Burners and Igniters ORIFICE CAUTION EQUIPMENT DAMAGE HAZARD 1.00-in Failure to follow this CAUTION can result in premature wear (25.4 mm) and damage to equipment.

  • Page 32: Removing The Heat Exchanger

    Disconnect gas piping at unit gas valve. INTEGRATED GAS UNIT Remove wires connected to gas valve. Mark each wire. RACEWAY CONTROLLER (IGC) Remove igniter wires and sensor wires at the Integrated Gas Unit Controller (IGC). (See Fig. 54.) Remove the two screws attaching the burner rack to the vestibule plate (see Fig.

  • Page 33: Burner Ignition

    GAS VALVE Burner Ignition All three-phase models (except Low NOx) are equipped with 2- Unit is equipped with a direct spark ignition 100% lockout sys- stage gas valves. Single-phase models and all Low NOx models tem. The Integrated Gas Unit Controller (IGC) is located in the are equipped with single-stage gas valves.
  • Page 34 LOW HEAT 72,000 BTUH INPUT AND 60,000 BTUH INPUT MEDIUM AND HIGH HEAT 115,000 BTUH INPUT, 150,000 BTUH INPUT, 90,000BTUH INPUT AND 120,000 BTUH INPUT Fig. 55 — Spark Adjustment (Size 04-07)
  • Page 35 125,000/90,000 BTUH INPUT 125,000/90,000 BTUH INPUT 180,000/120,000 BTUH INPUT 180,000/120,000 BTUH INPUT 240,000/180,000 BTUH INPUT 240,000/180,000 BTUH INPUT 250,000/200,000 BTUH INPUT 250,000/200,000 BTUH INPUT Fig. 57 — Spark Adjustment (Size 12) Fig. 56 — Spark Adjustment (Size 08-09)
  • Page 36 IGNITER AND SENSOR LOCATIONS (BRACKET HEAT COVER NOT SHOWN FOR CLARITY) 0.130 5 CELL 50TM400735 6 CELL 50TM400484 0.181 8 CELL 50TM400485 10 CELL 50TM400439 Fig. 58 — Spark Adjustment (Size 14) REGULATOR COVER SCREW (2) REGULATOR ON/OFF COVER SCREW PLASTIC ADJUST ON/OFF SWITCH...
  • Page 37 RED LED - STATUS Fig. 60 — Integrated Gas Control (IGC) Board...
  • Page 38 Table 13 — IGC Connections TERMINAL LABEL POINT DESCRIPTION SENSOR LOCATION TYPE OF I/O CONNECTION PIN NUMBER INPUTS Input power from TRAN 1 control box 24 VAC — RT, C Speed sensor gas section analog input J1, 1-3 Flame sensor gas section switch input —...
  • Page 39 Table 15 — Altitude Compensation* (Sizes 04-06) NATURAL GAS NOMINAL HEAT INPUT ELEVATION 72K BTUH 115KBTUH 150K BTUH Feet Meters Orifice Size Input (btu/hr) Orifice Size Input (btu/hr) Orifice Size Input (btu/hr) 0 to 2,000 0-610 72,000 115,000 †30 150,000 2,000 66,240 105,800...
  • Page 40 Table 16 — Altitude Compensation* (Sizes 07-12) 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 Orifice Input Size (btu/hr) Size (btu/hr) Size (btu/hr)
  • Page 41 Table 17 — Altitude Compensation* (Size 14) NATURAL GAS NOMINAL HEAT INPUT ELEVATION 150K BTUH 180K BTUH 240K BTUH 315K BTUH 380K BTUH ORIFICE INPUT ORIFICE INPUT ORIFICE INPUT ORIFICE INPUT ORIFICE INPUT SIZE (BTU/HR) SIZE (BTU/HR) SIZE (BTU/HR) SIZE (BTU/HR) SIZE (BTU/HR)

  • Page 42: Troubleshooting Heating System

    MINIMUM HEATING ENTERING AIR TEMPERATURE Thermostat When operating on first stage heating, the minimum temperature of air entering the dimpled heat exchanger is 50°F continuous and 45°F intermittent for standard heat exchangers and 40°F continu- ous and 35°F intermittent for stainless steel heat exchangers. To OALT operate at lower mixed-air temperatures, a field-supplied outdoor- air thermostat must be used to initiate both stages of heat when the...

  • Page 43: Premierlink™ Control

    Table 20 — 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 Hardware Failure No gas heating. — on IGC, power to unit, 24V circuit breaker, transformer, and wiring to the IGC.
  • Page 44 WIRING HARNESS OUTDOOR AIR HOOD OUTSIDE AIR TEMPERATURE SENSOR ECONOMI$ER2 HOOD PLUG SHIPPING BRACKET GEAR DRIVEN BAROMETRIC DAMPER RELIEF DAMPER Fig. 64 — EconoMi$er2 Component Locations Fig. 63 — EconoMi$er X Component Locations...
  • Page 45 Fig. 65 — RTU Open Overlay for Economizer Wiring...
  • Page 46 Fig. 66 — VFD Overlay for W2770 Controller Wiring...
  • Page 47 FOR OCCUPANCY CONTROL REPLACE JUMPER WITH FIELD-SUPPLIED TIME CLOCK LEGEND NOTES: — Demand Controlled Ventilation 1. 620 ohm, 1 watt 5% resistor should be removed only when using — Indoor Air Quality differential enthalpy or dry bulb. — Low Ambient Lockout Device 2.
  • Page 48 BLACK TRANSFORMER GROUND BLUE 500 OHM RESISTOR VIOLET PINK OAT SENSOR ACTULATOR FEEDBACK (2-10VDC) ORANGE ACTULATOR WHITE DIRECT DRIVE 4-20mA SIGNAL CONTROL ACTUATOR (4-20mA) ECONOMI$ER2 PLUG NOTES: 1. Switch on actuator must be in run position for economizer to operate. 3.

  • Page 49: Economi$Er Iv Standard Sensors

    OUTDOOR AIR LOCKOUT SENSOR EconoMi$er IV Standard Sensors Table 21 provides a summary of EconoMi$er IV. Troubleshoot- The EconoMi$er IV is equipped with an ambient temperature ing instructions are enclosed. A functional view of the lockout switch located in the outdoor airstream which is used to EconoMi$er is shown in Fig.
  • Page 50 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 enthalpy set point potentiometer fully clockwise to the D setting.
  • Page 51 DIFFERENTIAL ENTHALPY CONTROL CO SENSOR MAX RANGE SETTING For differential enthalpy control, the EconoMi$er IV controller 6000 uses two enthalpy sensors (HH57AC078 and CRENT- DIF004A00), one in the outside air and one in the return air duct. 5000 The EconoMi$er IV controller compares the outdoor air enthalpy to the return air enthalpy to determine EconoMi$er IV use.
  • Page 52 When the timeclock contacts are open (removing the 24-v signal lected anytime after the sensor is powered up. from terminal N), the EconoMi$er IV will be in unoccupied Use setting 1 or 2 for Carrier equipment. mode. Press Clear and Mode buttons. Hold at least 5 seconds DEMAND CONTROLLED VENTILATION (DCV) until the sensor enters the Edit mode.

  • Page 53: Economi$Er Iv Preparation

    The custom settings of the CO sensor can be changed anytime af- Single Enthalpy ter the sensor is energized. Follow the steps below to change the To check single enthalpy: non-standard settings: Make sure EconoMi$er IV preparation procedure has been Press Clear and Mode buttons.

  • Page 54: Economi$Er Iv Troubleshooting Completion

    Remove the 5.6 kilo-ohm resistor and jumper T to T1. The SYSTEM COMPONENTS actuator should drive fully open. The EconoMi$er X system includes an economizer module, 20k Remove the jumper across T and T1. The actuator should mixed air sensor, damper actuator, and either a 20k outdoor air drive fully closed.
  • Page 55 Humidity: range 0 to 100% RH with 5% accuracy. NOTE: Up to three (3) S-Bus sensors may be connected to the W7220 economizer module for outdoor air (OA), return air (RA) and discharge (supply) air (DA). 4 Binary Inputs 1-wire 24 vac + common GND (see page 56 for wiring details). 24 vac power supply AUX2- 20 to 30 vac 50/60Hz;...
  • Page 56 Table 24 — Economizer Module Table 25 — HH57AC081 Sensor Wiring Terminations (Right Hand Terminal Blocks) TERMINAL TYPE DESCRIPTION LABEL TYPE DESCRIPTION NUMBER LABEL Top Right Terminal Blocks S-BUS Communications AUX2 I 24 vac IN The first terminal is not used. S-BUS S-BUS (Enthalpy Control...
  • Page 57 To use the keypad when working with menus: NOTE: When values are displayed, pressing and holding the ▲ or ▼ button causes the display to automatically increment or • Press the ▲ (Up arrow) button to move to the previous decrement.
  • Page 58 Table 27 — W7220 Menu Structure* PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † FIRST STAGE COOLING DEMAND (Y1–IN) ECON AVAIL YES/NO YES = economizing available; the system can use outside air for free cooling when required FIRST STAGE COOLING RELAY OUTPUT ECONOMIZING YES/NO...
  • Page 59 Table 27 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † EXHAUST STAGE 2 RELAY OUTPUT Output of AUX1 O terminal Displays ON when damper position reaches programmed EXH2 OUT ON/OFF percentage set point.
  • Page 60 Table 27 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † EXHAUST FAN STAGE 1 SETPOINT Set point for OA damper position when exhaust fan 1 is powered 0 to 100%; by the economizer.
  • Page 61 Table 27 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † NONE Used for alarm for when the DA air temperature is too high. Sets 70°F to 180°F DA HI ALM 80°F (27°C) upper range of alarm;...
  • Page 62 Table 27 — W7220 Menu Structure* (cont) PARAMETER PARAMETER EXPANDED PARAMETER NAME MENU PARAMETER DEFAULT RANGE AND Notes VALUE INCREMENT † Check if outdoor temperature is below the LOW Temp Lockout on set point menu. Check if Mixed air temperature on STATUS FREEZE ALARM menu is below the Lo Set point on Advanced menu.
  • Page 63 Table 29 — Dry Bulb Operation without DCV (CO Sensor) — 1 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I FAN SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED VENTILATION (DCV) ECONOMIZE High 0-v/Off 0-v/Off MIN POS Closed High 24-v/On 0-v/Off MIN POS Closed High...
  • Page 64 Table 32 — Enthalpy Operation with DCV (CO Sensor) — 1 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I FAN SPEED Y1-O Y2-O OCCUPIED UNOCCUPIED VENTILATION (DCV) ECONOMIZE High 0-v/Off 0-v/Off Closed VENTMIN High 24-v/On 0-v/Off Closed VENTMIN High 24-v/On 24-v/On...
  • Page 65 Table 34 — Dry Bulb Operation with DCV (CO Sensor) — 2 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE 0v/Off 0v/Off VENTMIN Closed 24v/On 0v/Off VENTMIN Closed HIGH 24v/On 24v/On VENTMIN Closed...
  • Page 66 Table 36 — Enthalpy Operation with DCV (CO Sensor) — 2 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE 0v/Off 0v/Off VENTMIN Closed 24v/On 0v/Off VENTMIN Closed HIGH 24v/On 24v/On VENTMIN Closed 0v/Off...
  • Page 67 ECONOMIZING DUAL ENTHALPY AVAILABLE HIGH LIMIT NOT AVAILABLE SINGLE ENTHALPY P2 (T,RH) (T,RH) TEMPERATURE Fig. 83 — Single Enthalpy Curve Boundaries Table 38 — Single Enthalpy and Dual Enthalpy High Limit Curves POINT P1 POINT P2 ENTHALPY TEMP. DRY TEMP. ENTHALPY HUMIDITY HUMIDITY...

  • Page 68: Pre-Start-Up/Start-Up

    You can also navigate to the Alarms menu at any time. Clearing Alarms WARNING Once the alarm has been identified and the cause has been re- ELECTRICAL OPERATION HAZARD moved (e.g. replaced faulty sensor) the alarm can be cleared from Failure to follow this warning could result in personal injury or the display.

  • Page 69: Return-Air Filters

    Compressor Mounting Compressors are internally spring mounted. Do not loosen or re- WARNING move compressor hold down bolts. FIRE, EXPLOSION HAZARD Internal Wiring Failure to follow this warning could result in death, serious Check all electrical connections in unit control boxes. Tighten as personal injury and/or property damage.

  • Page 70: Ventilation (Continuous Fan)

    20 in-lbs (2.3 Nm) ± 2 in-lbs 0.2 Nm) bolts Condenser fan hub setscrew 84 in-lbs (9.5 Nm) ± 12 in-lbs (1.4 Nm) Use the Carrier network communication software to start up and configure the PremierLink controller. Changes can be made using the ComfortWORKS software, ®...

  • Page 71: Appendix A -Model Number Nomenclature

    APPENDIX A — MODEL NUMBER NOMENCLATURE HC D E 09 A 2 A 6 A 0 A 3 B 0 Unit Heat Type Factory Assigned 48 - Gas Heat Packaged Rooftop 0 = Standard 1 = LTL Model Series - WeatherMaster ®...

  • Page 72: Appendix B - Physical Data

    APPENDIX B — PHYSICAL DATA Table A — PHYSICAL DATA (Cooling) 3-5 Tons 48HC*A04 48HC*B04 48HC*A05 48HC*B05 48HC*A06 48HC*B06 Refrigeration System # Circuits / # Comp. / Type 1 / 1 / Scroll 1 / 1 / Scroll 1 / 1 / Scroll 1 / 1 / Scroll 1 / 1 / Scroll 1 / 1 / Scroll...
  • Page 73 APPENDIX B — PHYSICAL DATA Table A — PHYSICAL DATA (Cooling) 3-5 Tons (cont) 48HC*A04 48HC*B04 48HC*A05 48HC*B05 48HC*A06 48HC*B06 Cond. fan / motor Qty / Motor Drive Type 1 / direct 1 / direct 1 / direct 1 / direct 1 / direct 1 / direct Motor HP / RPM...
  • Page 74 APPENDIX B — PHYSICAL DATA Table B — PHYSICAL DATA (Cooling) 6 Tons 48HC*A07 48HC*B07 48HC*D07 48HC*E07 Refrigeration System # Circuits / # Comp. / Type 1 / 1 / Scroll 1 / 1 / Scroll 1 / 1 / 2-Stage Scroll 1 / 1 /2-Stage Scroll Puron refrigerant (R-410A) charge (lb-oz)
  • Page 75 APPENDIX B — PHYSICAL DATA Table B — PHYSICAL DATA (Cooling) 6 Tons (cont) 48HC*A07 48HC*B07 48HC*D07 48HC*E07 Cond. fan / motor Qty / Motor Drive Type 2 / direct 2 / direct 2 / direct 2 / direct Motor HP / RPM / 1100 / 1100 / 1100...
  • Page 76 APPENDIX B — PHYSICAL DATA Table C — PHYSICAL DATA (Cooling) 7.5-8.5 Tons 48HC*D08 48HC*E08 48HC*D09 48HC*E09 Refrigeration System # Circuits / # Comp. / Type 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll RTPF models R-410a charge A/B (lbs - oz) 9 - 10 / 9 - 10 —...
  • Page 77 APPENDIX B — PHYSICAL DATA Table D — PHYSICAL DATA (Cooling) 10-12.5 Tons 48HC*D11 48HC*E11 48HC*D12 48HC*E12 48HC*D14 48HC*E14 Refrigeration System # Circuits / # Comp. / Type 2/2/Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll 2 / 2 / Scroll RTPF models R-410a charge A/B (lbs - oz) 12-10/ 13-0...

  • Page 78: Appendix C - Fan Performance

    APPENDIX C — FAN PERFORMANCE Table E — 48HC*A04 Horizontal Unit - Direct Drive Table F — 48HC*A04 Vertical Unit - Direct Drive Fan Fan Performance Performance SPEED SPEED (TORQUE) (TORQUE) 0.45 0.23 0.30 0.19 0.33 0.22 0.17 0.17 1050 0.22 0.20 1050...
  • Page 79 APPENDIX C — FAN PERFORMANCE Table G — 48HC*A05 Horizontal Unit - Direct Drive Table H — 48HC*A05 Vertical Unit - Direct Drive Fan Performance Fan Performance SPEED SPEED (TORQUE) (TORQUE) 1200 0.49 0.35 1200 0.38 0.30 1300 0.34 0.33 1300 0.24 0.28...
  • Page 80 APPENDIX C — FAN PERFORMANCE Table I — 48HC*A06 Horizontal Unit - Direct Drive Table J — 48HC*A06 Vertical Unit - Direct Drive Fan Fan Performance Performance SPEED SPEED (TORQUE) (TORQUE) 1500 0.40 0.50 1500 0.27 0.45 1625 0.20 0.48 1625 0.08 0.43...
  • Page 81 APPENDIX C — FAN PERFORMANCE Table K — 48HC**04 3 Phase without Humidi-MiZer ® , 3 Ton, Horizontal Supply — Belt Drive Fan Performance AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.14 0.24 0.35 0.48 1007 0.63 0.16 0.26 0.38 0.51 1023 0.66 1050...
  • Page 82 APPENDIX C — FAN PERFORMANCE Table M — 48HC**04 3 Phase with Humidi-MiZer ® , 3 Ton, Horizontal Supply — Belt Drive Fan Performance AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.14 0.24 0.35 0.48 1007 0.63 0.16 0.26 0.38 0.51 1023 0.66 1050...
  • Page 83 APPENDIX C — FAN PERFORMANCE Table O — 48HC**05 3 Phase without Humidi-MiZer ® , 4 Ton, Horizontal Supply — Belt Drive Fan Performance AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 0.24 0.35 0.48 0.63 1074 0.78 1300 0.29 0.41 0.54 1019 0.69...
  • Page 84 APPENDIX C — FAN PERFORMANCE Table Q — 48HC**05 3 Phase with Humidi-MiZer ® , 4 Ton, Horizontal Supply — Belt Drive Fan Performance AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1200 0.24 0.35 0.48 0.63 1074 0.78 1300 0.29 0.41 0.54 1019 0.69...
  • Page 85 APPENDIX C — FAN PERFORMANCE Table S — 48HC**06 3 Phase without Humidi-MiZer ® , 5 Ton, Horizontal Supply — Belt Drive Fan Performance AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 0.41 0.55 1002 0.71 1088 0.87 1167 1.05 1625 0.50 0.65 1041...
  • Page 86 APPENDIX C — FAN PERFORMANCE Table U — 48HC**06 3 Phase with Humidi-MiZer ® , 5 Ton, Horizontal Supply — Belt Drive Fan Performance AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1500 0.41 0.55 1002 0.71 1088 0.87 1167 1.05 1625 0.50 0.65 1041...
  • Page 87 APPENDIX C — FAN PERFORMANCE Table W — 48HC**07 3 Phase, 6 Ton, Horizontal Supply — Belt Drive Fan Performance AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 1800 0.33 0.51 0.72 0.96 1.23 1950 0.38 0.58 0.80 1.04 1.31 2100 0.45 0.65 0.88 1.13...
  • Page 88 APPENDIX C — FAN PERFORMANCE Table Y — 48HC**08 3 Phase, 7.5 Ton, Horizontal Supply — Belt Drive Fan Performance AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 2250 0.36 0.51 0.66 0.82 0.98 2438 0.43 0.59 0.75 0.92 1.09 2625 0.51 0.68 0.85 1.03...
  • Page 89 APPENDIX C — FAN PERFORMANCE Table AA — 48HC**09 3 Phase, 8.5 Ton, Horizontal Supply — Belt Drive Fan Performance AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 2550 0.47 0.64 0.81 0.99 1.16 2750 0.57 0.75 0.93 1.11 1.30 3000 0.70 0.89 1.09 1.29...
  • Page 90 APPENDIX C — FAN PERFORMANCE Table AC — 48HC**11 3 Phase, 10 Ton, Horizontal Supply — Belt Drive Fan Performance 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...
  • Page 91 APPENDIX C — FAN PERFORMANCE Table AE — 48HC**12 3 Phase, 10 Ton, Horizontal Supply — Belt Drive Fan Performance 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...
  • Page 92 APPENDIX C — FAN PERFORMANCE Table AG — 48HC**14 3 Phase, 12.5 Ton, Horizontal Supply — Belt Drive Fan Performance AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 3438 0.57 0.78 1.02 1.30 1.62 3750 0.69 0.91 1.17 1.45 1.77 4063 0.84 1.07 1.33 1.62...
  • Page 93 Carrier recommends the lower horsepower option. For information on the electrical properties of Carrier motors, please see the Electrical Data section of this unit’s product data. For more information on the performance limits of Carrier motors, see the application data section of this unit’s product data.

  • Page 94: Appendix D - Wiring Diagrams

    APPENDIX D — WIRING DIAGRAMS Table AI — Wiring Diagrams 48HC*A04-D14 UNITS STANDARD HUMIDI-MIZER SIZE VOLTAGE CONTROL POWER CONTROL POWER 230-1-60 48TM502526 (page 102) 48TM503099 (Page 125) 208/230-3-60 48TM502527 (page 103) 48TM503100 (Page 126) A04 - A06 48TM502525 (page 95) 48TM503098 (Page 120) 460-3-60 48TM502527 (page 103)
  • Page 95 APPENDIX D — WIRING DIAGRAMS Fig. B — 48HC*A04-A06 YAC Control Diagram — 208-1-60; 208/230-3-60; 460/575-3-60...
  • Page 96 APPENDIX D — WIRING DIAGRAMS Fig. C — 48HC*D07 YAC Control Diagram — 208/230-3-60; 460/575-3-60 (6 Ton 2 Stage Cooling)
  • Page 97 APPENDIX D — WIRING DIAGRAMS Fig. D — 48HC*D07 YAC Control Diagram — 208/230-3-60; 460/575-3-60 (6 Ton 2 Stage with Dehumidification)
  • Page 98 APPENDIX D — WIRING DIAGRAMS Fig. E — 48HC*A07 YAC Control Diagram — 208/230-3-60; 460/575-3-60...
  • Page 99 APPENDIX D — WIRING DIAGRAMS Fig. F — 48HC*D08-D09 YAC Control Diagram — 208/230-3-60; 460/575-3-60...
  • Page 100 APPENDIX D — WIRING DIAGRAMS Fig. G — 48HC*D11YAC Control Diagram — 208/230-3-60, 460/575-3-60...
  • Page 101 APPENDIX D — WIRING DIAGRAMS Fig. H — 48HC*D12 YAC Control Diagram — 208/230-3-60; 460/575-3-60...
  • Page 102 APPENDIX D — WIRING DIAGRAMS Fig. I — 48HC*A04-A06 YAC Power Diagram — 208/230-1-60...
  • Page 103 APPENDIX D — WIRING DIAGRAMS Fig. J — 48HC*A04-A06 YAC Power Diagram — 208/230-3-60; 460-3-60...
  • Page 104 APPENDIX D — WIRING DIAGRAMS Fig. K — 48HC*A04-A06 YAC Power Diagram — 575-3-60...
  • Page 105 APPENDIX D — WIRING DIAGRAMS Fig. L — 48HC*D07-D12 YAC Power Diagram — 208/230-3-60, 460-3-60 (6 Ton 2 Stage with Cooling)
  • Page 106 APPENDIX D — WIRING DIAGRAMS Fig. M — 48HC*D07-D12 YAC Power Diagram — 208/230-3-60, 460-3-60 (6 Ton 2 Stage with Dehumidification)
  • Page 107 APPENDIX D — WIRING DIAGRAMS Fig. N — 48HC*A07-A12 YAC Power Diagram — 208/230-3-60, 460-3-60...
  • Page 108 APPENDIX D — WIRING DIAGRAMS Fig. O — 48HC*A07-A12 YAC Power Diagram — 575-3-60...
  • Page 109 APPENDIX D — WIRING DIAGRAMS Fig. P — 48HC*D08-D09 YAC Power Diagram — 230/460-3-60...
  • Page 110 APPENDIX D — WIRING DIAGRAMS Fig. Q — 48HC*D08-D09 YAC Power Diagram — 575-3-60...
  • Page 111 APPENDIX D — WIRING DIAGRAMS Fig. R — 48HC*D11 YAC Power Diagram 208/230-3-60...
  • Page 112 APPENDIX D — WIRING DIAGRAMS Fig. S — 48HC*D11 YAC Power Diagram 460-3-60...
  • Page 113 APPENDIX D — WIRING DIAGRAMS Fig. T — 48HC*D11 YAC Power Diagram 575-3-60...
  • Page 114 APPENDIX D — WIRING DIAGRAMS Fig. U — 48HC*D12 YAC Power Diagram — 230/460-3-60...
  • Page 115 APPENDIX D — WIRING DIAGRAMS Fig. V — 48HC*D12 YAC Power Diagram — 575-3-60...
  • Page 116 APPENDIX D — WIRING DIAGRAMS Fig. W — 48HC*D14 YAC Control Diagram — 208/230-3-60; 460/575-3-60...
  • Page 117 APPENDIX D — WIRING DIAGRAMS Fig. X — 48HC*D14 YAC Power Diagram — 208/230-3-60...
  • Page 118 APPENDIX D — WIRING DIAGRAMS Fig. Y — 48HC*D14 YAC Power Diagram — 460-3-60...
  • Page 119 APPENDIX D — WIRING DIAGRAMS Fig. Z — 48HC*D14 YAC Power Diagram — 575-3-60...
  • Page 120 APPENDIX D — WIRING DIAGRAMS Fig. AA — 48HC*A04-A06 YAC Control Diagram — 230-1-60; 230/460/575-3-60 with Dehumidification...
  • Page 121 APPENDIX D — WIRING DIAGRAMS Fig. AB — 48HC*A07 YAC Control Diagram — 230-1-60; 230/460/575-3-60 with Dehumidification...
  • Page 122 APPENDIX D — WIRING DIAGRAMS Fig. AC — 48HC*D08-D09 YAC Control Diagram — 230/460/575-3-60 with Dehumidification...
  • Page 123 APPENDIX D — WIRING DIAGRAMS Fig. AD — 48HC*D11 YAC Control Diagram — 230-1-60; 230/460/575-3-60 with Dehumidification...
  • Page 124 APPENDIX D — WIRING DIAGRAMS Fig. AE — 48HC*D12 YAC Control Diagram — 230/460/575-3-60 with Dehumidification...
  • Page 125 APPENDIX D — WIRING DIAGRAMS Fig. AF — 48HC*A04-A06 YAC Power Diagram — 208/230-1-60 with Humidi-MiZer ® System...
  • Page 126 APPENDIX D — WIRING DIAGRAMS ® Fig. AG — 48HC*A04-A06 YAC Power Diagram — 230/460-3-60 with Humidi-MiZer System...
  • Page 127 APPENDIX D — WIRING DIAGRAMS ® Fig. AH — 48HC*A04-A06 YAC Power Diagram — 575-3-60 with Humidi-MiZer System...
  • Page 128 APPENDIX D — WIRING DIAGRAMS ® Fig. AI — 48HC*A07 YAC Power Diagram — 230/460-3-60 with Humidi-MiZer System...
  • Page 129 APPENDIX D — WIRING DIAGRAMS ® Fig. AJ — 48HC*A07 YAC Power Diagram — 575-3-60 with Humidi-MiZer System...
  • Page 130 APPENDIX D — WIRING DIAGRAMS ® Fig. AK — 48HC*D08-D09 YAC Power Diagram — 230/460-3-60 with Humidi-MiZer System...
  • Page 131 APPENDIX D — WIRING DIAGRAMS ® Fig. AL — 48HC*D08-D09 YAC Power Diagram — 575-3-60 with Humidi-MiZer System...
  • Page 132 APPENDIX D — WIRING DIAGRAMS ® Fig. AM — 48HC*D11 YAC Power Diagram — 208/230-3-60 with Humidi-MiZer System...
  • Page 133 APPENDIX D — WIRING DIAGRAMS ® Fig. AN — 48HC*D11 YAC Power Diagram — 460-3-60 with Humidi-MiZer System...
  • Page 134 APPENDIX D — WIRING DIAGRAMS ® Fig. AO — 48HC*D11 YAC Power Diagram — 575-3-60 with Humidi-MiZer System...
  • Page 135 APPENDIX D — WIRING DIAGRAMS Fig. AP — 48HC*D12 YAC Power Diagram — 230/460-3-60 with Humidi-MiZer ® System...
  • Page 136 APPENDIX D — WIRING DIAGRAMS ® Fig. AQ — 48HC*D12 YAC Power Diagram — 575-3-60 with Humidi-MiZer System...
  • Page 137 APPENDIX D — WIRING DIAGRAMS Fig. AR — 48HC*D14 YAC Control Diagram — 230/460/575-3-60 with Humidi-MiZer ® System...
  • Page 138 APPENDIX D — WIRING DIAGRAMS ® Fig. AS — 48HC*D14 YAC Power Diagram — 208/230-3-60 with Humidi-MiZer System...
  • Page 139 APPENDIX D — WIRING DIAGRAMS ® Fig. AT — 48HC*D14 YAC Power Diagram — 460-3-60 with Humidi-MiZer System...
  • Page 140 APPENDIX D — WIRING DIAGRAMS ® Fig. AU — 48HC*D14 YAC Power Diagram — 575-3-60 with Humidi-MiZer System...
  • Page 141 APPENDIX D — WIRING DIAGRAMS 50HE500891 Fig. AV — YAC Direct Digital System Control Wiring Diagram System...
  • Page 142 APPENDIX D — WIRING DIAGRAMS Fig. AW — PremierLink™ System Control Wiring Diagram System...
  • Page 143 APPENDIX D — WIRING DIAGRAMS ® Fig. AX — PremierLink™ System Control Wiring Diagram with Humidi-MiZer System...
  • Page 144 APPENDIX D — WIRING DIAGRAMS Fig. AY — RTU-Open Wiring Diagram...

  • Page 145: Locations

    APPENDIX E — MOTORMASTER SENSOR LOCATIONS Fig. BB — 48HC*A07 and 48HC*D07 Outdoor Circuiting Fig. AZ — 48HC*A04 Outdoor Circuiting Fig. BC — 48HC*A08 Outdoor Circuiting Fig. BA — 48HC*A05/06 Outdoor Circuiting...
  • Page 146 C12493 Fig. BG — 48HC*D12 Motormaster Sensor Location — Novation Coils (MCHX) © Carrier Corporation 2019 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480156-01 Printed in U.S.A.

  • Page 147: Start-Up Checklist

    UNIT START-UP CHECKLIST (Remove and use for Job File) NOTE: To avoid injury to personnel and damage to equipment or property when completing the procedures listed in this start-up checklist, use good judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preceding sec- tions of this Service and Maintenance Instructions document.
  • Page 148 10. Restore set-points for thermostat and humidistat (Y/N) _____ REPEAT PROCESS FOR 2 COMPRESSOR SYSTEMS. © Carrier Corporation 2019 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53480156-01 Printed in U.S.A.

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