Table of Contents
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CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42
Step 1 — Provide Unit Support . . . . . . . . . . . . . . . . . . . 1
• ROOF CURB
• SLAB MOUNT
Step 2 — Field Fabricate Ductwork . . . . . . . . . . . . . . . 2
Step 3 — Install External Trap for Condensate
Drain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 4 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 2
•
POSITIONING
Step 5 — Install Flue Hood . . . . . . . . . . . . . . . . . . . . . . . 4
Step 6 — Install Gas Piping . . . . . . . . . . . . . . . . . . . . . . 4
Step 7 — Make Electrical Connections . . . . . . . . . . 11
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
• HEAT ANTICIPATOR SETTINGS
Step 8 — Adjust Factory-Installed Options . . . . . . 15
• MANUAL OUTDOOR-AIR DAMPER
• CONVENIENCE OUTLET
• NOVAR CONTROLS
• APOLLO CONTROL
• PREMIERLINK™ CONTROL
• OPTIONAL ECONOMI$ER2
• ECONOMI$ER2 CONTROLLER WIRING
AND CONFIGURATION
Step 9 — Adjust Evaporator-Fan Speed . . . . . . . . . 25
• DIRECT-DRIVE MOTORS
• BELT-DRIVE MOTORS
Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43-45
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45-50
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . 51-56
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Start-Up Checklist . . . . . . . . . . . . . . . . . . . . . . . . CL-1
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical compo-
nents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance func-
tions of cleaning coils and filters and replacing filters. All other
operations should be performed by trained service personnel.
When working on air-conditioning equipment, observe precau-
tions in the literature, tags and labels attached to the unit, and
other safety precautions that apply.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguishers available for all brazing operations.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Book 1
4
Tab
1a 6a
Installation, Start-Up, and
Service Instructions
Page
Catalog No. 534-80103
Single-Package Rooftop
Before performing service or maintenance operations on
unit, turn off main power switch to unit and install a lock-
out tag. Electrical shock could cause personal injury.
Unit is shipped in the vertical duct configuration. To convert
to horizontal configuration, remove and save screws from side
duct opening covers and remove covers. Using the same
screws, install covers on vertical duct openings with the
insulation-side down. Seals around duct openings must be
tight. See Fig. 1.
Confirm before installation of unit that voltage, amperage
and circuit protection requirements listed on unit data plate
agree with power supply provided.
Step 1 — Provide Unit Support
ROOF CURB — Assemble and install accessory roof curb in
accordance with instructions shipped with curb. See Fig. 2. In-
stall insulation, cant strips, roofing felt, and counter flashing as
shown. Ductwork must be attached to curb, not to the unit. The
accessory thru-the-bottom power and gas connection package
must be installed before the unit is set on the roof curb. If field-
installed (thru-the-roof curb) gas connections are desired, use
factory-supplied
mount the thru-the-roof curb connection to the roof curb. Gas
connections and power connections to the unit must be field
installed after the unit is installed on the roof curb.
If electric and control wiring is to be routed through the
basepan, attach the accessory thru-the-bottom service connec-
tions to the basepan in accordance with the accessory installa-
tion instructions.
IMPORTANT: The gasketing of the unit to the roof curb is
critical for a watertight seal. Install gasket supplied with the
roof curb as shown in Fig. 2. Improperly applied gasket can
result in air leaks and poor unit performance.
Printed in U.S.A.
Form 48T-1SI
48TF004-007
48TM004-007
Heating/Cooling Units
Disconnect gas piping from unit when leak
testing at pressure greater than
1
sures greater than
/
psig will cause gas
2
valve damage resulting in hazardous condi-
tion. If gas valve is subjected to pressure
1
greater than
/
psig, it must be replaced
2
before use. When pressure testing field-
supplied gas piping at pressures of
or less, a unit connected to such piping must
be isolated by manually closing the gas
valve.
INSTALLATION
3
/
-in. pipe coupling and gas plate assembly to
4
Pg 1
4-02
1
/
psig. Pres-
2
1
/
psig
2
Replaces: 48TF-3SI
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Related Manuals for Carrier 48TM004-007
Summary of Contents for Carrier 48TM004-007
- Page 1 48TF004-007 48TM004-007 Single-Package Rooftop Heating/Cooling Units Installation, Start-Up, and Service Instructions CONTENTS Page Disconnect gas piping from unit when leak SAFETY CONSIDERATIONS ..... . 1 testing at pressure greater than psig.
- Page 2 Fig. 1 — Horizontal Conversion Panels Curb should be level. Unit leveling tolerances are shown in When using the standard side drain connection, make sure Fig. 3. This is necessary for unit drain to function properly. the plug (Red) in the alternate bottom connection is tight before Refer to Accessory Roof Curb Installation Instructions for installing the unit.
- Page 3 ROOF CURB CONNECTOR D ALT UNIT SIZE POWER CONTROL ACCESSORY PKG. ACCY. DRAIN HOLE ″ [19] NPT ″ ″ 1′-2″ CRBTMPWR001A00 CRRFCURB001A00 [356] ″ [31.7] 48TF,TM [19] NPT [12.7] CRBTMPWR002A00 004-007 ″ ″ 2′-0″ ″ 1′-9 1′-4″ CRRFCURB002A00 ″ [19] NPT CRBTMPWR003A00 [610] [551]...
- Page 4 mechanical draft system flue assembly at least 48 in. from an adjacent building or combustible material. Adequate combustion- and ventilation-air space must be MAXIMUM ALLOWABLE provided for proper operation of this equipment. Be sure that DIFFERENCE (in.) installation complies with all local codes and Section 5.3, Air for Combustion and Ventilation, NFGC (National Fuel Gas Code), and ANSI (American National Standards Institute) Z223.1, and NFPA (National Fire Protection Association)
- Page 5 Table 1A — Physical Data — 48TF004-007 UNIT SIZE 48TF E/F/H/M/N004 D/E/F/G/H/K/L/M/N005 D/E/F/G/H/K/L/M/N006 D/E/F007 NOMINAL CAPACITY (tons) OPERATING WEIGHT (lb) Unit Al/Al* Al/Cu* Cu/Cu* Economizer EconoMi$er2 Roof Curb† COMPRESSOR Reciprocating Scroll Quantity No. Cylinders (per Circuit) Oil (oz) REFRIGERANT TYPE R-22 Expansion Device Acutrol™...
- Page 6 Table 1A — Physical Data — 48TF004-007 (cont) UNIT SIZE 48TF E/F/H/K/M/N004 D/E/F/G/H/K/L/M/N005 D/E/F/G/H/K/L/M/N006 D/E/F007 FURNACE SECTION Rollout Switch Cutout Temp (F)†† Burner Orifice Diameter (in..drill size) Natural Gas TFD/GII — .113...33 .113...33 .113...33 TFE/HII .113...33 .113...33 .113...33 .113...33 TFF/KII .113...33 .129...30...
- Page 7 Table 1B — Physical Data — 48TM004-007 UNIT SIZE 48TM E/F/H/K/M/N004 D/E/F/G/H/K/L/M/N005 D/E/F/G/H/K/L/M/N006 D/E/F007 NOMINAL CAPACITY (tons) OPERATING WEIGHT (lb) Unit Al/Al* Economizer EconoMi$er2 Roof Curb† COMPRESSOR Reciprocating Scroll Quantity No. Cylinders (per Circuit) Oil (oz) REFRIGERANT TYPE R-22 Expansion Device Acutrol™...
- Page 8 Table 1B — Physical Data — 48TM004-007 (cont) UNIT SIZE 48TM E/F/H/K/M/N004 D/E/F/G/H/K/L/M/N005 D/E/F/G/H/K/L/M/N006 D/E/F007 FURNACE SECTION Rollout Switch Cutout Temp (F)†† Burner Orifice Diameter (in..drill size) Natural Gas TMD/GII — .113...33 .113...33 .113...33 TME/HII .113...33 .113...33 .113...33 .113...33 TMF/KII .113...33...
- Page 11 Fig. 8 — Gas Piping Guide (With Accessory would invalidate any applicable Carrier warranty. Thru-the-Curb Service Connections) 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 aver-...
- Page 12 208/230-3-60 208/230-1-60 460-3-60 (SIZE 007 ONLY) 575-3-60 208/230-3-60 (SIZE 007 ONLY) 575-3-60, 460-3-60 (SIZES 004-006) LEGEND — Contactor COMP — Compressor — Indoor-Fan Contactor — National Electrical Code — Terminal Block Fig. 9 — Power Wiring Connections RACEWAY LOW VOLTAGE INTEGRATED GAS UNIT CONNECTIONS CONTROLLER (IGC)
- Page 13 Table 2A — Electrical Data (Without Convenience Outlet) VOLTAGE COMPR DISCONNECT COMBUSTION POWER SUPPLY NOMINAL RANGE (ea) (ea) SIZE* UNIT FAN MOTOR VOLTAGE TYPE MOCP† 25.2/25.2 30/30 24/24 106/106 208/230-1-60 16.2 96.0 26.6/26.6 35/35 26/26 111/111 17.7/17.7 25/25 17/17 85/ 85 208/230-3-60 10.2 75.0...
- Page 14 Table 2B — Electrical Data (With Convenience Outlet) VOLTAGE COMPR DISCONNECT COMBUSTION POWER SUPPLY NOMINAL RANGE (ea) (ea) SIZE* UNIT FAN MOTOR VOLTAGE TYPE MOCP† 31.2/31.2 35/35 30/30 111/111 208/230-1-60 16.2 96.0 32.6/32.6 40/40 31/31 116/116 22.5/22.5 25/25 23/23 90/ 90 208/230-3-60 10.2 75.0...
- Page 15 (evaporator) fan status, filter status, and indoor-air quality. The 6. Remove and save 6 screws (3 on each side) from sides of Apollo control is designed to work with Carrier TEMP and the manual outdoor-air damper. ®...
- Page 16 The PremierLink controller (see Fig. 16) requires the use of c. Reinstall the EconoMi$er2 controller in its original a Carrier electronic thermostat or a CCN connection for time position using the screws saved in Step 2a. Tighten broadcast to initiate its internal timeclock. This is necessary for screws.
- Page 17 HK50AA039 SPACE TEMP./ SET POINT ADJUSTMENT GAS HEATING UNIT ONLY OPTIONAL ACCESSORY PremierLink 5 AMP INDOOR AIR QUALITY SENSOR LOGIC SAFETY LOGIC COMMS 0-20mA PP/MP RELAYS TRAN 1 2 3 COMMUNICATIONS FIELD COMMON ACCUSENSOR LOGIC CLO 1 (004-007) P .S. ECONOMISER2 (008-014) OFC;C1...
- Page 18 ECONOMISER2 ACTUATOR ECONOMISER2 GEAR-DRIVEN CONTROLLER DAMPER PLUG CONTROLLER COMPRESSOR LOCKOUT HOOD BOX SENSOR BRACKET ECONOMISER2 DRY BULB OUTSIDE AIR SENSOR BAROMETRIC RELIEF DAMPERS Fig. 18 — EconoMi$er2 Component Locations Fig. 21 — Hood Box Removal FILTER ACCESS PANEL SIDE PANEL COMPRESSOR ACCESS PANEL OUTDOOR-AIR OPENING AND...
- Page 19 Mount the return air enthalpy sensor in the return air duct. 17 1/4” The return air enthalpy sensor is wired to terminals S and + on the EconoMi$er2 controller. See Fig. 31. The outdoor enthalpy changeover set point is set with the outdoor enthalpy set point potentiometer on the EconoMi$er2 controller.
- Page 20 BLACK BLUE 500 OHM RESISTOR VIOLET NOTE 1 PINK NOTE 3 50HJ540573 ACTUATOR ASSEMBLY OPTIONAL CO SENSOR 4 - 20 mA OUTPUT WHITE DIRECT DRIVE ACTUATOR ECONOMISER2 PLUG NOTES: 1. Switch on actuator must be in run position for economizer to operate. 2.
- Page 21 Fig. 30 — Enthalpy Changeover Set Points ECONOMISER2 CONTROLLER VIOLET VIOLET NOTE: Remove the 620-ohm resistor between SR and + before installing a differential enthalpy or adjustable dry bulb sensor. Fig. 31 — Differential Enthalpy Wiring...
- Page 22 Table 3 — EconoMi$er2 Sensor Usage OUTDOOR AIR RETURN AIR OUTDOOR AIR RETURN AIR APPLICATION TEMPERATURE SENSOR TEMPERATURE SENSOR ENTHALPY SENSOR ENTHALPY SENSOR Standard Unit* Included — 50HJ540569 — — — Differential Required — Required — — — Dry Bulb CROASENR001A00 CROASENR001A00 Single...
- Page 23 Air Change (Evacuation) — When terminals AC and AC1 on the EconoMi$er2 controller connect through relay contacts or a NOTE: Use setting 1 or 2 for Carrier equipment. See Table 4. jumper, an air change is initiated. See Fig. 34. The 1.
- Page 24 Dehumidification of Fresh Air with DCV Control — Infor- mation from AHSRAE indicates that the largest humidity load on any zone is the fresh air introduced. For some applications, a device such as a 62AQ energy recovery unit is added to re- duce the moisture content of the fresh air being brought into the building when the enthalpy is high.
- Page 25 Table 4 — CO Sensor Standard Settings VENTILATION OPTIONAL RELAY RATE ANALOG CONTROL RELAY SETTING EQUIPMENT OUTPUT HYSTERESIS (cfm/ OUTPUT RANGE SETPOINT (ppm) Person) (ppm) (ppm) 0-10V Proportional 0-2000 1000 4-20 mA Interface w/Standard 2-10V Proportional 0-2000 1000 Building Control System 7-20 mA 0-10V Exponential...
- Page 26 6000 5000 4000 3000 2000 1000 0.05 0.10 0.15 0.20 0.25 0.30 0.35 STATIC PRESSURE (in. wg) MOTOR MOUNTING Fig. 36 — Vertical EconoMi$er2 Static Pressure PLATE NUTS (48TF,TM004-007) Fig. 39 — Belt Drive Motor Mounting 6000 5000 4000 3000 2000 1000 0.1"...
- Page 27 Table 6 — Evaporator-Fan Motor Performance UNIT EVAPORATOR-FAN UNIT MAXIMUM ACCEPTABLE MAXIMUM ACCEPTABLE MAXIMUM 48TF,TM MOTOR VOLTAGE CONTINUOUS BHP* OPERATING WATTS AMP DRAW 208/230 Standard 0.34 208/230 Alternate 1.00 1000 208/230 High Static 2.40 2120 208/230 Standard 0.75 208/230 Alternate 1.00 1000 208/230...
- Page 28 Table 8 — Fan Performance 48TF,TM004 — Vertical Discharge Units — Standard Motor LOW SPEED HIGH SPEED AIRFLOW 208 V 230, 460, 575 V 208 V 230, 460, 575 V (Cfm) Watts Watts Watts Watts 0.49 0.21 0.50 0.23 0.51 0.26 0.55 0.31...
- Page 29 Table 10 — Fan Performance 48TF,TM004 — Vertical Discharge Units — High Static Motor* EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) Watts Watts Watts Watts Watts 0.18 0.25 0.34 0.43 1061 0.47 1000 0.22 0.30 0.38 1039 0.49 1086 0.55 1100 0.26 0.35...
- Page 30 Table 12 — Fan Performance 48TF,TM005 — Vertical Discharge Units — Alternate Motor* EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts 1200 596 0.20 665 0.25...
- Page 31 Table 14 — Fan Performance 48TF,TM006 — Vertical Discharge Units and Standard Motor LOW SPEED MEDIUM SPEED HIGH SPEED AIRFLOW 208 V 230,460,575 V 208 V 230,460,575 V 208 V 230,460,575 V (Cfm) ESP Bhp Watts ESP Bhp Watts ESP Bhp Watts ESP Bhp Watts...
- Page 32 Table 16 — Fan Performance 48TF,TM006 — Vertical Discharge Units — High Static Motor* EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) Watts Watts Watts Watts Watts 1500 0.42 0.56 1001 0.69 1084 0.85 1168 1.01 1032 1600 0.49 0.64 1034 0.78 1111 0.94...
- Page 33 Table 17 — 48TF,TM007 — Vertical Discharge Units — Standard Motor* EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts 1800 942 0.70 978 0.66 1063 0.82 1147 0.97 1248 1.20...
- Page 34 Table 18 — 48TF,TM007 Fan Performance — Vertical Discharge Units — High Static Motor* EXTERNAL STATIC PRESURE (in. wg) AIRFLOW (Cfm) Watts Watts Watts Watts Watts 1800 0.66 1063 0.82 1147 0.97 1248 1.20 1081 1322 1.33 1190 1900 1023 0.78 1097 0.91...
- Page 35 Table 19 — Fan Performance 48TF,TM004 — Horizontal Discharge Units — Standard Motor LOW SPEED HIGH SPEED AIRFLOW 208 V 230, 460, 575 V 208 V 230, 460, 575 V (Cfm) Watts Watts Watts Watts 0.54 0.21 0.57 0.23 0.55 0.26 0.60 0.31...
- Page 36 Table 21 — Fan Performance 48TF,TM004 — Horizontal Discharge Units — High Static Motor* EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) Watts Watts Watts Watts Watts 0.08 0.22 0.27 0.36 1028 0.42 1000 0.13 0.26 0.31 0.39 1064 0.48 1100 0.16 0.29 0.35...
- Page 37 Table 22 — Fan Performance — 48TF,TM005 — Horizontal Discharge Units — Standard Motor LOW SPEED HIGH SPEED AIRFLOW 208 V 230, 460, 575 V 208 V 230, 460, 575 V (Cfm) Watts Watts Watts Watts 1200 0.75 0.41 0.81 0.45 0.87 0.51...
- Page 38 Table 24 — Fan Performance — 48TF,TM005 — Horizontal Discharge Units — High Static Units* EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) Watts Watts Watts Watts Watts 1200 0.23 0.34 0.46 0.58 1030 0.70 1300 0.28 0.39 0.52 0.65 1044 0.77 1400 0.33...
- Page 39 Table 26 — Fan Performance — 48TF,TM006 — Horizontal Discharge Units — Alternate Motor* EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts 1500 730 0.34 789 0.40 896 0.53...
- Page 40 Table 27 — Fan Performance — 48TF,TM006 — Horizontal Discharge Units — High Static Units* EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts 1500 789 0.40 896 0.53...
- Page 41 Table 28 — Fan Performance — 48TF,TM007 — Horizontal Discharge Units — Standard Motor* EXTERNAL STATIC PRESSURE (in. wg) AIRFLOW (Cfm) Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts Rpm Bhp Watts 1800 885 0.63 942 0.73 1047 0.90...
- Page 42 3. Use of a field-supplied motor may affect wire sizing. Contact that the full range of the motor can be utilized with confidence. your Carrier representative for details. Using your fan motors up to the wattage ratings shown will not...
- Page 43 *As the height above sea level increases, there is less oxygen per cubic foot of air. Therefore, heat input rate should be reduced at the wrong direction. higher altitudes. 2. Turn off power to the unit. †Orifices available through your Carrier distributor. 3. Reverse any two of the unit power leads.
- Page 44 (C) is deenergized and the com- higher altitudes. pressor and OFM shut off. After a 30-second delay, the IFM †Orifices are available through your local Carrier distributor. shuts off. If the thermostat fan selector switch is in the ON posi- Heating tion, the evaporator motor will run continuously.
- Page 45 backflush toward return-air section to remove foreign OUTPUT material. Flush condensate pan after completion. 5. Reinstall economizer and filters. LIGHT ON 6. Reconnect wiring. D SETPOINT 7. Replace access panels. LIGHT OFF LIGHT ON CONDENSER COIL — Inspect coil monthly. Clean con- C SETPOINT denser coil annually, and as required by location and outdoor air conditions.
- Page 46 Amount of refrigerant charge is listed on unit nameplate (also refer to Tables 1A and 1B). Refer 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 charging procedure.
- Page 47 SUCTION LINE TEMPERATURE (DEG. C) OUTDOOR TEMP SUCTION LINE TEMPERATURE (DEG. F) Fig. 46 — Cooling Charging Chart, 48TF,TM004 SUCTION LINE TEMPERATURE (DEG. C) OUTDOOR TEMP SUCTION LINE TEMPERATURE (DEG. F) Fig. 47 — Cooling Charging Chart, 48TF,TM005...
- Page 48 SUCTION LINE TEMPERATURE (DEG. C) OUTDOOR TEMP SUCTION LINE TEMPERATURE (DEG. F) Fig. 48 — Cooling Charging Chart, 48TF,TM006 SUCTION LINE TEMPERATURE (DEG. C) OUTDOOR TEMP SUCTION LINE TEMPERATURE (DEG. F) Fig. 49 — Cooling Charging Chart, 48TF,TM007...
- Page 49 Replacement Parts — A complete list of replacement If lockout occurs, unit may be reset by interrupting power parts may be obtained from any Carrier distributor upon supply to unit for at least 5 seconds. request. Table 31 — LED Error Code Description*...
- Page 50 Fig. 51 — Burner Tray Details LOW HEAT 48TFE/TME004, 48TFH/TMH004, 48TFD/TMD005-007, 48TFG/TMG005,006 — 74,000 BTUH INPUT 48TFM/TMM004, 48TFL/TML005,006 — 60,000 BTUH INPUT MEDIUM AND HIGH HEAT 48TFE/TME005-007, 48TFH/TMH005,006, 48TFF/TMF004, 48TFK/TMK004 — 115,000 BTUH INPUT 48TFF/TMF005-007, 48TFK/TMK005,006 — 150,000 BTUH INPUT 48TFN/TMN004, 48TFM/TMM005,006 —...
- Page 51 TROUBLESHOOTING Fan should turn on. The actuator should drive to 90 to 95% open. Refer to Tables 32-34 for unit troubleshooting. 4. Turn the exhaust potentiometer CW until the Exhaust EconoMi$er2 Troubleshooting LED turns off. The LED should turn off when the poten- tiometer is approximately 90%.
- Page 52 6. Remove the jumper from the Air Change terminals. MIXED-AIR SENSOR — The mixed-air sensor has a nega- Jumper the Shutdown terminals. The exhaust LED turns tive coefficient. As the ambient temperature increases, the off. The Unit Control, Indoor Fan, and Exhaust Fan con- resistance decreases.
- Page 53 Table 33 — Heating Service Analysis PROBLEM CAUSE REMEDY Burners will not ignite. Misaligned spark electrodes. Check flame ignition and sensor electrode positioning. Adjust as needed. No gas at main burners. Check gas line for air, purge as necessary. After purging gas line of air, allow gas to dissipate for at least 5 minutes before attempting to relight unit.
- Page 54 Table 34 — Cooling Service Analysis PROBLEM CAUSE REMEDY Compressor and condenser fan Power failure. Call power company. will not start. Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. Defective thermostat, contactor, transformer, or Replace component. control relay.
- Page 55 ECONOMISER2 CONTROLLER ACTUATOR BROWN 24 VAC HOT BLACK BROWN 24 VAC COM BLACK BLACK ECONOMIZER 820 OHM DRY BULB RESISTOR GRAY VIOLET GRAY SENSOR 620 OHM RESISTOR BLUE BLUE BLACK YELLOW YELLOW WHITE VIOLET VIOLET Compressor Lockout N.C. PINK PINK WHITE 2-10V WHITE...
- Page 56 LEGEND FOR FIG. 54 — TYPICAL WIRING SCHEMATIC AND COMPONENT ARRANGEMENT IMPORTANT: Refer to unit wiring label for actual unit wiring information. — Adjustable Heat Anticipator — Switch Fully Open — Contactor, Compressor — Switch Fully Closed — Capacitor — Switch Min. Vent Position —...
- Page 57 Power connections Burner rack Error codes PremierLink Burner section Leak test Smoke control Burner spark gap Limit switch Thermostat Carrier Comfort Network Liquid propane Unit 6, 8 55, 56 Charging chart, refrigerant Low pressure switch 47, 48 6, 8 Clearance...
- Page 58 Copyright 2002 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 1 PC 111 Catalog No. 534-80103 Printed in U.S.A. Form 48T-1SI Pg 58 4-02 Replaces: 48TF-3SI...
- Page 60 VERIFY REFRIGERANT CHARGE USING CHARGING TABLES VERIFY THAT 3-PHASE SCROLL COMPRESSOR IS ROTATING IN CORRECT DIRECTION (48TF,TM007 ONLY) Copyright 2002 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
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