Page 1: Table Of Contents
48HJ004---007 48HE003---006 Single---Package Rooftop Heating/Cooling Standard and Low NOx Units Installation Instructions CONTENTS SAFETY CONSIDERATIONS ......INSTALLATION .
Page 2: Step 1 -Provide Unit Support
WARNING FIRE, EXPLOSION HAZARD Failure to follow this warning could death and/or property damage. Disconnect gas piping from unit when leak testing at pressure greater than psig. Pressures greater than psig will cause gas valve damage resulting in hazardous condition. If gas valve is subjected to pressure greater than psig, it must be replaced before use.
Page 3 D ALT CONNECTOR DRAIN PKG. ACCY. HOLE CRBTMPWR001A01 CRBTMPWR002A01 1 -9 1 -4 CRBTMPWR003A01 [551] [406] [44.5] CRBTMPWR004A01 ACCESSORY POWER CONTROL POWER [19] NPT [19] NPT [31.7] [19] NPT [12.7] [12.7] [12.7] NPT [31.7] [19] NPT Fig. 2 --- Roof Curb Details ROOF CURB UNIT ACCESSORY...
Page 4: Positioning
Lifting holes are provided in base rails as shown in Fig. 8 and 9. Refer to rigging instructions on unit. WARNING PROPERTY DAMAGE HAZARD Failure to follow this warning could result in personal injury, death and property damage. All panels must be in place when rigging and lifting. positioning Maintain clearance around and above unit to provide minimum distance from combustible materials, proper airflow, and service...
Page 5 OPERATING UNIT WEIGHT 48HE OPERATING UNIT WEIGHT 48HJ Fig. 7 --- Roof Curb Alignment Support gas piping as shown in the table in Fig. 11. For example, -in. gas pipe must have one field-fabricated support beam every 8 ft. Therefore, an 18-ft long gas pipe would have a minimum of 3 support beams, and a 48-ft long pipe would have a minimum of 6 support beams.
Page 8: Step 7 -Make Electrical Connections
(See Fig. 2.) field control wiring Install a Carrier-approved accessory thermostat assembly according to installation instructions included with the accessory. Locate thermostat assembly on a solid wall in the conditioned space to sense average temperature in accordance with thermostat installation instructions.
Page 9 BASE UNIT 48HJ NOMINAL CAPACITY OPERATING WEIGHT (lb) Unit Humidi-MiZer™ Adaptive Dehumidification System EconoMi$er IV Roof Curb COMPRESSOR Quantity Oil (oz) REFRIGERANT TYPE Expansion Device Operating Charge (lb-oz) Standard Unit Unit With Humidi-Mizer Adaptive Dehumidification System CONDENSER FAN Quantity...Diameter (in.) Nominal Cfm Motor Hp...Rpm Watts Input (Total)
Page 10 BASE UNIT 48HJ FURNACE SECTION Rollout Switch Cutout Temp (F)† Burner Orifice Diameter (in..drill size)** Natural Gas — Std Liquid Propane — Alt†† Thermostat Heat Anticipator Setting (amps) 208/230/460/575 v First Stage Second Stage Gas Input (Btuh) First Stage/Second Stage Efficiency (Steady State) (%) Temperature Rise Range Manifold Pressure (in.
Page 11 BASE UNIT 48HE NOMINAL CAPACITY OPERATING WEIGHT (lb) Unit Humidi-MiZer™ Adaptive Dehumidification System EconoMi$er IV Roof Curb COMPRESSOR Quantity Oil (oz) REFRIGERANT TYPE Expansion Device Operating Charge (lb-oz) Standard Unit Unit With Humidi-Mizer Adaptive Dehumidification System CONDENSER FAN Quantity...Diameter (in.) Nominal Cfm Motor Hp...Rpm Watts Input (Total)
Page 12 BASE UNIT 48HE FURNACE SECTION Rollout Switch Cutout Temp (F)† Burner Orifice Diameter (in..drill size)** Natural Gas — Std* Liquid Propane — Alt†† Thermostat Heat Anticipator Setting (amps) 208/230/460/575 v First Stage Second Stage Gas Input (Btuh) First Stage/Second Stage Efficiency (Steady State) (%) Temperature Rise Range Manifold Pressure (in.
Page 13 48HE003-006 48HE006 COOL STAGE 1 Y1/W2 HEAT STAGE 1 W/W1 WIRE CONNECTIONS COOL STAGE 2 Y/Y2 HEAT STAGE 2 O/W2 LOW-VOLTAGE SECTION 24 VAC HOT 24 VAC COM IPD/X OUTDOOR AIR SENSOR THERMOSTAT DIPSWITCH SETTINGS LEGEND Field Wiring NOTE: Underlined letter indicates active thermostat output when configured for A/C operation.
Page 17: Step 8 -Adjust Factory-Installed Options
HUMIDI- -MIZER™ ADAPTIVE DEHUMIDIFICATION SYSTEM Humidi- -MiZer system operation can be controlled by field installation of a Carrier- -approved humidistat. (See Fig. 16.) NOTE: A light commercial Thermidistat™ device (Fig. 17) can be used instead of the humidistat if desired. The Thermidistat device includes a thermostat and a humidistat.
Page 18 LEGEND — Circuit Breaker — Cooling Relay — Dehumidify Relay — Discharge Solenoid Valve — Heater Relay — Low Pressure Switch — Liquid Solenoid Valve LTLO — Low Temperature Lockout Field Splice Fig. 18 --- Typical Humidi- -MiZert Adaptive Dehumidification System DEHUM TS TAT WIRES LEGEND...
Page 19: Premierlink™ Control
PremierLink controller. The PremierLink controller (see Fig. 24 and 25) requires the use of a Carrier electronic thermostat or a CCN connection for time broadcast to initiate its internal timeclock. This is necessary for broadcast of time of day functions (occupied/unoccupied). No sensors are supplied with the field- -mounted PremierLink control.
Page 20 OUTDOOR AIR APPLICATION TEMPERATURE SENSOR Differential Dry Bulb Temperature with PremierLink* Included --- (PremierLink CRTEMPSN001A00 requires 4-20 mA Actuator) Single Enthalpy with PremierLink* Included --- (PremierLink Not Used requires 4-20 mA Actuator) Differential Enthalpy with PremierLink* Included --- (PremierLink Not Used requires 4-20 mA Actuator) *PremierLink control requires Supply Air Temperature sensor 33ZCSENSAT and Outdoor Air Temperature sensor CRTEMPSN001A00...
Page 21 PREMIERLINK CONTROL HINGED DOOR PANEL Space Temp./ Set Point Adjustment Indoor Air Quality Sensor Outdoor Air Quality Sensor Power Exhaust/Energy Recycler RMTOCC CMPSAFE GRAY GRAY OUTDOOR AIR ENTHALPY SENSOR Economi$er2 4 - 20mA RETURN AIR ENTHALPY SENSOR Fig. 25 --- PremierLinktController (Installed) TB - 2 TB - 3 Comm.
Page 22: Optional Economi$Er Iv And Economi$Er2
Connect the GRAY/RED wire to J4-1 on PremierLink controller and to terminal (2) on enthalpy sensor. NOTE: If installing in a Carrier rooftop, use the two gray wires provided from the control section to the economizer to connect PremierLink controller to terminals 2 and 3 on enthalpy sensor.
Page 23: Economi$Er Iv Standard Sensors
NOTE: These instructions are for installing the optional EconoMi$er IV and EconoMi$er2 only. Refer to the accessory EconoMi$er IV or EconoMi$er2 installation instructions when field installing an EconoMi$er IV or EconoMi$er2 accessory. 1. To remove the existing unit filter access panel, raise the panel and swing the bottom outward.
Page 24: Economi$Er Iv Control Modes
Supply Air Temperature (SAT) Sensor The supply air temperature sensor is a 3 K thermistor located at the inlet of the indoor fan. (See Fig. 41.) This sensor is factory installed. The operating range of temperature measurement is 0° to 158_F. See Table 6 for sensor temperature/resistance values. Table 6—Supply Air Sensor Temperature/ Resistance Values TEMPERATURE (F)
Page 25 LEGEND Potentiometer Defaults Settings: Power Exhaust DCV— Demand Controlled Ventilation Minimum Pos. IAQ — Indoor Air Quality DCV Max. LA — Low Ambient Lockout Device DCV Set OAT — Outdoor-Air Temperature Enthalpy POT — Potentiometer RAT — Return-Air Temperature 500 OHM RESISTOR NOTE 1 NOTE 3...
Page 26 Differential Enthalphy Control For differential enthalpy control, the EconoMi$er IV controller uses enthalpy sensors (HH57AC078 CRENTDIF004A00), one in the outside air and one in the return air duct. The EconoMi$er IV controller compares the outdoor air enthalpy to the return air enthalpy to determine EconoMi$er IV use.
Page 27 activation to allow the dampers to open. This delay allows the damper to reach the appropriate position to avoid unnecessary fan overload. Minimum Position Control There is a minimum damper position potentiometer on the EconoMi$er IV controller. (See Fig. 42.) The minimum damper position maintains the minimum airflow into the building during the occupied period.
Page 28 CONTROL CONTROL POINT CURVE APPROX. deg. F (deg. C) AT 50% RH 73 (23) 70 (21) 67 (19) 63 (17) (18) (16) (13) (10) (10) (13) (16) (18) APPROXIMATE DRY BULB TEMPERATURE--degrees F (degrees C) Typically the maximum ventilation rate will be about 5 to 10% more than the typical cfm required per person, using normal outside air design criteria.
Page 29: Step 9 - Adjust Evaporator-Fan Speed
(See Table 8.) Use setting 1 or 2 for Carrier equipment. (See Table 8.) 1. Press Clear and Mode buttons. Hold at least 5 seconds until the sensor enters the Edit mode.
Page 30 SETTING EQUIPMENT OUTPUT Proportional Interface w/Standard Proportional Building Control System Exponential Proportional Proportional Economizer Exponential Exponential Health & Safety Proportional Parking/Air Intakes/ Proportional Loading Docks LEGEND ppm — Parts Per Million 0.35 0.25 0.15 0.05 1000 2000 Fig. 48 --- Humidi- -MiZert Adaptive Dehumidification System Static Pressure Drop (in. wg) Fig.
Page 31 Table 9—48HJ and 48he Fan Rpm at Motor Pulley Setting With Standard Motor* UNIT 48HJ 48HE 1044 1008 1185 1144 1460 1425 1585 1538 *Approximate fan rpm shown (standard motor/drive). Table 10—48HJ Fan Rpm at Motor Pulley Setting With High-Static Motor* UNIT 48HJ 1455...
Page 32 Unit warranty will not be affected. See Tables 9 and 10 on this page for additional information. 3. Use of a field-supplied motor may affect wire sizing. Contact your Carrier representative to verify. 4. Interpolation is permissible. Do not extrapolate.
Page 33 Table 17—Fan Performance 48HJ004, 48HE004 — Vertical Discharge Units; Standard Motor AIRFLOW Watts 0.15 1000 0.18 1100 0.22 1200 0.26 1300 0.31 1400 0.36 1500 0.42 AIRFLOW Watts 1016 0.51 1080 1000 1041 0.59 1104 1100 1066 0.68 1129 1200 1093 0.77 1155...
Page 34 Table 19— Fan Performance 48HJ005, 48HE005 — Vertical Discharge Units; Standard Motor AIRFLOW Watts 1200 0.26 1300 0.31 1400 0.36 1500 0.42 1600 0.49 1700 0.57 1800 0.66 1900 0.75 1014 2000 0.85 1049 AIRFLOW Watts 1200 1093 0.77 1155 1300 1119 0.87...
Page 35 Table 20—Fan Performance 48HJ005, 48HE005 — Vertical Discharge Units; High-Static Motor (Belt Drive)* AIRFLOW Watts 1200 0.26 1300 0.31 1400 0.36 1500 0.42 1600 0.49 1700 0.57 1800 0.66 1900 0.75 1014 2000 0.85 1049 AIRFLOW Watts 1200 1093 0.77 1155 1300 1119...
Page 36 Table 22—Fan Performance 48HJ006, 48HE006 Three-Phase — Vertical Discharge Units; AIRFLOW Watts 1500 0.42 1600 0.49 1004 1700 0.57 1040 1800 0.65 1077 1900 1007 0.75 1115 2000 1048 0.85 1153 2100 1090 0.97 1191 2200 1131 1.09 1230 2300 1173 1.23 1091...
Page 37 Table 24—Fan Performance 48HJ007 — Vertical Discharge Units; Standard Motor (Belt Drive)* AIRFLOW Watts 1800 0.63 1075 1900 1008 0.72 1112 2000 1049 0.82 1151 2100 1091 0.93 1189 2200 1133 1.05 1229 2300 1176 1.18 1047 1268 2400 1218 1.32 1170 1308...
Page 38 Table 25—Fan Performance 48HJ007 — Vertical Discharge Units; High-Static Motor (Belt Drive)* AIRFLOW Watts 1800 0.63 1075 1900 1008 0.72 1112 2000 1049 0.82 1151 2100 1091 0.93 1189 2200 1133 1.05 1229 2300 1176 1.18 1047 1268 2400 1218 1.32 1170 1308...
Page 39 Table 27—Fan Performance 48HJ004, 48HE004 — Horizontal Discharge Units; Standard Motor AIRFLOW Watts 0.14 1000 0.16 1100 0.20 1200 0.23 1300 0.28 1400 0.33 1500 0.38 AIRFLOW Watts 1019 0.64 1084 1000 1042 0.70 1107 1100 1065 0.77 1130 1200 1089 0.84 1153...
Page 40 Table 29—Fan Performance 48HJ005, 48HE005 — Horizontal Discharge Units; Standard Motor AIRFLOW Watts 1200 0.23 1300 0.28 1400 0.33 1500 0.38 1600 0.45 1700 0.52 1800 0.59 1900 0.68 2000 0.77 1006 AIRFLOW Watts 1200 1089 0.84 1153 1300 1113 0.92 1177 1400...
Page 41 Table 31—Fan Performance 48HJ006, 48HE006 Single-Phase — Horizontal Discharge Units; AIRFLOW Watts 1500 0.39 1600 0.46 1700 0.54 1800 0.63 1010 1900 0.73 1047 2000 1001 0.84 1085 2100 1043 0.96 1123 2200 1085 1.09 1162 2300 1127 1.23 1092 —...
Page 42 Table 32—Fan Performance 48HJ006, 48HE006 Three-Phase — Horizontal Discharge Units; AIRFLOW Watts 1500 0.39 1600 0.46 1700 0.54 1800 0.63 1010 1900 0.73 1047 2000 1001 0.84 1085 2100 1043 0.96 1123 2200 1085 1.09 1162 2300 1127 1.23 1092 1201 2400 1169...
Page 43 Table 34—Fan Performance 48HJ007 — Horizontal Discharge Units; Standard Motor (Belt Drive)* AIRFLOW Watts 1800 0.64 1010 1900 0.73 1046 2000 0.84 1083 2100 1032 0.95 1120 2200 1073 1.07 1158 2300 1114 1.21 1074 1196 2400 1155 1.36 1204 1234 2500 1196...
Page 44 Table 35—Fan Performance 48HJ007 — Horizontal Discharge Units; High-Static Motor (Belt Drive)* AIRFLOW Watts 1800 0.64 1010 1900 0.73 1046 2000 0.84 1083 2100 1032 0.95 1120 2200 1073 1.07 1158 2300 1114 1.21 1074 1196 2400 1155 1.36 1204 1234 2500 1196...
Page 45: Pre-Start-Up
PRE-START-UP WARNING FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury, death and/or property damage: 1. Follow recognized safety practices and wear protective goggles when checking or servicing a refrigerant system. 2. Do not operate the compressor or provide any electric power to the unit unless the compressor terminal cover is in place and secured.
Page 46 *As the height above sea level increases, there is less oxygen per cubic foot of air. Therefore, the input rate should be reduced at higher alti- tudes. †Orifices are available through your local Carrier distributor. Step 12 —Heating 1. Purge gas supply line of air by opening union ahead of the gas valve.
Page 47 A maximum of 9 trips can occur, extending the evaporator-fan off delay to 180 seconds. To restore the original default value, reset the power to the unit. To Shut Off Unit —Set system selector switch at off Resetting heating selector lever below room temperature will temporarily shut unit off until space temperature falls below thermostat setting.
Page 48 If SAT > SASP + 5 and economizer position >80%, economizer will go to minimum position for 3 minutes or until SAT > 68_F. If compressor one is on then second stage of mechanical cooling will be energized; otherwise the first stage will be energized.
Page 49 SPT reading is available OAT ± SPT Economizer Position is NOT forced If any of the above conditions are not met, the economizer submaster reference (ECSR) is set to maximum limit and the damper moves to minimum position. The operating sequence is complete.
Page 50: Service
Fig. 54 --- Humidi- -MiZer Subcooling Mode Operation Fig. 55 --- Humidi- -Mizert Hot Gas Reheat Mode Operation Hot Gas Reheat Mode When the humidity levels in the space require humidity control, a hot gas solenoid valve (specific to hot gas reheat mode only) will open to bypass a portion of hot gas refrigerant around the condenser coil.
Page 51 Table 39—Humidi-Mizer Adaptive Dehumidification System Sequence of Operation and System Response — Single Compressor Unit (48HE003- -006, 48HJ004-007) THERMOSTAT INPUT ECONOMIZER FUNCTION OAT. < Economizer Set Point — — NOTE: On a thermostat call for W1, all cooling and dehumidification will be off. LEGEND OAT --- Outdoor Air Temperature Fig.
Page 52 Step 7 —Loss- -of- -Charge Switch The loss-of-charge switch contains a Schrader core depressor, and is located on the compressor liquid line. This switch opens at 7 psig and closes at 22 psig. No adjustments are necessary. Step 8 —Freeze- -Stat The freeze-stat is a bimetal temperature-sensing switch that is located on the “hair-pin”...
Page 53 Fig. 62 --- Cooling Charging Chart, Standard 48HJ006 Fig. 63 --- Cooling Charging Chart, Standard 48HJ007 C06141 Fig. 64 --- Cooling Charging Chart, 48HJ004 with Optional Humidi- -MiZer Adaptive Dehumidification System C06142 Fig. 65 --- Cooling Charging Chart, 48HJ005 with Optional Humidi- -MiZer Adaptive Dehumidification System NOTE: When using the charging charts, it is important that only the subcooling/reheat dehumidification coil liquid line solenoid...
Page 54 The charts reference a liquid pressure (psig) and temperature at a point between the condenser coil and the subcooling/reheat dehumidification coil. A tap is provided on the unit to measure liquid pressure entering the subcooling/reheat dehumidification coil. IMPORTANT: The subcooling mode charging charts (Fig. 64- -67) are to be used ONLY with units having the Humidi- -MiZer adaptive dehumidification system.
Page 55 48HE - - 2 TON CHARGING CHART Suction Line Temperature (deg C) 10.5 15.5 20.5 25.5 105.0 100.0 95.0 90.0 85.0 80.0 75.0 70.0 65.0 Suction Line Temp (deg F) Fig. 68 --- Cooling Charging Chart, Standard 48HE003 48HE - - 3 TON CHARGING CHART Suction Line Temperature (deg C) 11.1 16.1...
Page 56 by removing one setscrew. Then remove nuts that hold motor to mounting plate. 6. To reinstall, reverse the procedure outlined above. Step 12 —Limit Switch Remove blower access panel (Fig. 8). Limit switch is located on the fan deck. Step 13 —Burner Ignition Unit is equipped with a direct spark ignition 100% lockout system.
Page 57 Fig. 74 --- Spark Gap Adjustment 5. Reinstall burner rack as described above. Step 15 —Replacement Parts A complete list of replacement parts may be obtained from any Carrier distributor upon request. Refer to Fig. 75 for a typical unit wiring schematic. C06154...
Page 58 — Contactor, Compressor — Capacitor — Compressor Lockout COMP — Compressor Motor EQUIP — Equipment — Freeze Up Protection Thermostat — Fuse — Ground — High-Pressure Switch — Hall-Effect Sensor — Ignitor — Induced-Draft Motor — Indoor Fan Contactor — Indoor Fan Motor —...
Page 59: Troubleshooting
See Table 40 for EconoMi$er IV logic. A functional view of the EconoMi$er IV is shown in Fig. 69. Typical settings, sensor ranges, and jumper positions are also shown. An EconoMi$er IV simulator program is available from Carrier help with EconoMi$er troubleshooting.
Page 60 3. Set DCV maximum position potentiometer to previous setting. 4. Set minimum position, DCV set point, and exhaust potentiometers to previous settings. 5. Remove 620-ohm resistor from terminals S 6. Remove 1.2 kilo-ohm checkout resistor from terminals S and +. If used, reconnect sensor from terminals S SYMPTOM Hardware Failure.
Page 61 PROBLEM CAUSE Burners Will Not Misaligned spark electrodes. Ignite. No gas at main burners. Water in gas line. No power to furnace. No 24 v power supply to control circuit. Miswired or loose connections. Burned-out heat anticipator in thermostat. Broken thermostat wires. Inadequate Heating.
Page 62 PROBLEM Compressor and Condenser Fan Will Not Start. Compressor Will Not Start But Condenser Fan Runs. Compressor Cycles (Other Than Normally Satisfying Thermostat). Compressor Operates Continuously. Excessive Head Pressure. Head Pressure Too Low. Excessive Suction Pressure. Suction Pressure Too Low. Evaporator Fan Will Not Shut Off.
Page 63 INPUTS Enthalpy* Demand Control Outdoor Ventilation (DCV) Below set High (DCV LED Off) (Free Cooling LED Off) (Free Cooling LED On) Above set High (DCV LED On) (Free Cooling LED Off) (Free Cooling LED On) *For single enthalpy control, the module compares outdoor enthalpy to the ABCD set point. †Power at N terminal determines Occupied/Unoccupied setting: **Modulation is based on the supply-air sensor signal.
Page 64: Start-Up Checklist
VERIFY THAT 3-PHASE SCROLL COMPRESSOR IS ROTATING IN THE CORRECT DIRECTION j VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS Copyright 2006 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

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