Carrier 48TF004-007 Specifications

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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111 Catalog No. 534-80000 Printed in U.S.A. Form 48TF-1SI Pg 1 8-00 Replaces: New
Book 1 4
Tab 1a 6a
Installation, Start-Up, and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS
. . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35
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
. . . . . . . . . . . 8
FIELD POWER SUPPLY
FIELD CONTROL WIRING
HEAT ANTICIPATOR SETTINGS
Step 8 — Make Outdoor-Air Adjustments
and Install Outdoor-Air Hood
. . . . . . . . . . . . . . . . . . 11
MANUAL OUTDOOR-AIR DAMPER
OPTIONAL DURABLADE ECONOMIZER
OPTIONAL ECONOMI$ER
Step 9 — Adjust Evaporator-Fan Speed
. . . . . . . . . 19
DIRECT-DRIVE MOTORS
BELT-DRIVE MOTORS
START-UP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-38
SERVICE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-43
TROUBLESHOOTING
. . . . . . . . . . . . . . . . . . . . . . . . . 44-49
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.
INSTALLATION
Unit is shipped in the vertical duct configuration. To convert
to horizontal configuration, remove screws from side duct
opening covers and remove covers. Using the same screws, in-
stall 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
3
/
4
-in. pipe coupling and gas plate assembly to
mount the thru-the-roof curb connection to the roof curb. Gas
connections and power connections to the unit must be field in-
stalled 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.
Disconnect gas piping from unit when leak
testing at pressure greater than
1
/
2
psig.
Pressures greater than
1
/
2
psig will cause
gas valve damage resulting in hazardous
condition. If gas valve is subjected to pres-
sure greater than
1
/
2
psig, it must be
replaced before use. When pressure testing
field-supplied gas piping at pressures of
1
/
2
psig or less, a unit connected to such
piping must be isolated by manually closing
the gas valve.
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.
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.
48TF004-007
Single-Package Rooftop
Heating/Cooling Units
Page view 0
1 2 3 4 5 6 ... 51 52

Summary of Contents

Page 1 - Service Instructions

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 1

Page 2 - Drain —

10Table 2 — Electrical Data LEGEND*Used to determine minimum disconnect per NEC.†Fuse or HACR circuit breaker.NOTES:1. In

Page 3 - Fig. 2 — Roof Curb Dimensions

11Step 8 — Make Outdoor-Air Adjustments andInstall Outdoor-Air HoodMANUAL OUTDOOR-AIR DAMPER — The outdoor-airhood and screen are attached to the bas

Page 4 - Step 5 — Install Flue Hood —

12OPTIONAL DURABLADE ECONOMIZER — The op-tional economizer hood assembly is packaged and shipped inthe filter section. Damper blades and control boar

Page 5

13BLOCK-OFF PLATEECONOMIZERCONTROLBOARDECONOMIZERPLUGECONOMIZERMOTORTOPSCREWBAROMETRICRELIEF DAMPERWIRINGHARNESSPOSITION SETTINGBRACKETU-SHAPEDHOLE(NO

Page 6

14OPTIONAL ECONOMI$ER — See Fig. 25 for EconoMi$ercomponent locations.1. To remove the existing unit filter access panel, raise thepanel and swing the

Page 7 - Fig. 6 — Base Unit Dimensions

155. Slide the outdoor-air inlet screens into the screen track onthe hood side panels. While holding the screens in place,fasten the screen retainer t

Page 8

16OUTDOORAIRSENSORTEMPTEMPCOMOUTPWRBROWNVIOLETWHITEREDBROWNTEMPTEMPCOMOUTPWRRETURNAIRSENSORVIOLETWHITEREDOATCOMOAH-15 VRATCOMRAH+15 VECONOMI$ERCONTROL

Page 9 - HOLE IN END PANEL (HIDDEN)

174-PINCONNECTORPLUGL1L2GREEN11223344GND230 VAC1 PHASEGREEN/YELLOW3215869BA74LT. BLUEBLACKBROWNC1BLUEGREEN/YELLOW3215869BA74LT. BLUEBLACKBROWNC1BLUEFA

Page 10 - Table 2 — Electrical Data

18CO2 Control Setup — If a CO2 sensor is not being used, pro-ceed to the next section. If a CO2 sensor is being used, performthe following:1. Determin

Page 11 - Install Outdoor-Air Hood

19Step 9 — Adjust Evaporator-Fan Speed — Ad-just evaporator-fan rpm to meet jobsite conditions. Table 5shows fan rpm at motor pulley settings. Table

Page 12

2Curb should be level. Unit leveling tolerances are shown inFig. 3. This is necessary for unit drain to function properly. Re-fer to Accessory Roof Cu

Page 13 - Determine — Setting = 5 in

20Table 5 — Fan Rpm at Motor Pulley Settings**Approximate fan rpm shown.†Indicates alternate motor and drive package.**Indicates high-static motor and

Page 14

21Table 8 — Fan Performance 48TF004 — Vertical Discharge Units, Standard Motor LEGENDNOTES:1. Values include losses for filte

Page 15

22Table 10 — Fan Performance 48TF004 — Vertical Discharge Units, High-Static Motor LEGEND*Motor drive range is 1075 to 1455

Page 16 - Fig. 32 — EconoMi$er Wiring

23Table 12 — Fan Performance 48TF005 — Vertical Discharge Units, Alternate Motor LEGEND*Motor drive range is 835 to 118

Page 17 - ACCESS PANEL

24Table 14 — Fan Performance 48TF006 — Vertical Discharge Units, Standard Motor LEGENDNOTES:1. Values include losses for filt

Page 18

25Table 16 — Fan Performance 48TF006 — Vertical Discharge Units, High-Static Motor LEGEND*Motor drive range is 1300 to 1685 rpm

Page 19 - PLATE NUTS

26Table 17 — Fan Performance 48TF007 — Vertical Discharge Units, Standard Motor LEGEND*Motor drive range is 1070 to 1460 rpm. A

Page 20 - Table 6 — Motor Data

27Table 18 — Fan Performance 48TF007 — Vertical Discharge Units, High-Static Motor LEGEND*Motor drive range is 1300 to 1685 r

Page 21

28Table 19 — Fan Performance 48TF004 — Horizontal Discharge Units, Standard Motor LEGENDNOTES:1. Values include losses for filt

Page 22

29Table 21 — Fan Performance 48TF004 — Horizontal Discharge Units, High-Static Motor LEGEND*Motor drive range is 1075 to 1455 rpm.

Page 23

3Fig. 2 — Roof Curb DimensionsROOF CURBACCESSORYA UNIT SIZECRRFCURB001A001′-2″[356]48TF004-007CRRFCURB002A002′-0″[610]NOTES:1. Roof curb accessory is

Page 24

30Table 22 — Fan Performance 48TF005 — Horizontal Discharge Units, Standard Motor LEGENDNOTES:1. Values include losses for filt

Page 25

31Table 24 — Fan Performance 48TF005 — Horizontal Discharge Units, High-Static Motor LEGEND*Motor drive range is 1075 to 1455 rpm.

Page 26

32Table 26 — Fan Performance 48TF006 — Horizontal Discharge Units, Alternate Motor LEGEND*Motor drive range is 900 to 1300 rpm. Al

Page 27

33Table 27 — Fan Performance 48TF006 — Horizontal Discharge Units, High-Static Motor LEGEND*Motor drive range is 1300 to 1685 rpm.

Page 28

34Table 28 — Fan Performance 48TF007 — Horizontal Discharge Units, Standard Motor LEGEND*Motor drive range is 1070 to 1460 rpm. Al

Page 29

35Table 29 — Fan Performance 48TF007 — Horizontal Discharge Units, High-Static Motor LEGEND*Motor drive range is 1300 to 1685 rpm.

Page 30

36START-UPUnit Preparation — Make sure that unit has been in-stalled in accordance with these installation instructions andapplicable codes.Return-Air

Page 31

37If the limit switch trips at the start of the heating cycle dur-ing the evaporator ON delay, the time period of the ON delayfor the next cycle will

Page 32

38HEATING, UNITS WITH ECONOMIZER — When thethermostat calls for heating, terminal W1 is energized. To pre-vent thermostat short-cycling, the unit

Page 33

39LubricationCOMPRESSORS — Each compressor is charged with thecorrect amount of oil at the factory.FAN MOTOR BEARINGS — Fan motor bearings are of thep

Page 34

4Unit may be installed directly on wood flooring or onClass A, B, or C roof-covering material when roof curb is used.Although unit is weatherproof, gu

Page 35

404 TON UNIT CHARGING CHART3040506070809010020 30 40 50 60 70 80SUCTION LINE TEMPERATURE (DEG. F)207276345414483552621689-7 -1 4 10162127SUCTION LINE

Page 36

415 TON UNIT CHARGING CHART3040506070809010020 30 40 50 60 70 80SUCTION LINE TEMPERATURE (DEG. F)207276345414483552621689-7 -1 4 10 16 21 27SUCTION LI

Page 37 - Operating Sequence

42Combustion-Air Blower — Clean periodically toassure proper airflow and heating efficiency. Inspect blowerwheel every fall and periodically during

Page 38 - Cleaning —

43Fig. 51 — Burner Tray DetailsFig. 52 — Spark AdjustmentLOW HEAT48TFE004, 48TFD005-007 — 74,000 BTUH INPUT48TFM004, 48TFL005-006 — 60,000 BTUH INPUTM

Page 39

44TROUBLESHOOTINGTable 32 — LED Error Code Service AnalysisLEGENDTable 33 — Heating Service AnalysisPROBLEM CAUSE REMEDYHardware failure.(LED OFF)Loss

Page 40 - 3 TON UNIT CHARGING CHART

45Table 34 — Cooling Service AnalysisPROBLEM CAUSE REMEDYCompressor and condenser fan will not start.Power failure. Call power company.Fuse blown or c

Page 41 - 5 TON UNIT CHARGING CHART

46Table 35 — Durablade Economizer TroubleshootingLEGENDPROBLEM CAUSE REMEDYDamper does not open.Indoor (evaporator) fan is off. 1. Check to ensure tha

Page 42 - Replacement Parts —

47Table 36 — EconoMi$er TroubleshootingLEGENDOAT — Outdoor-Air TemperaturePROBLEM CAUSE REMEDYDamper does not open.Indoor (evaporator) fan is Off. Che

Page 43 - Fig. 52 — Spark Adjustment

48Fig. 53 — Typical Wiring Diagram and Component Arrangement

Page 44 - TROUBLESHOOTING

49LEGEND FOR FIG. 53 — TYPICAL WIRING SCHEMATIC AND COMPONENT ARRANGEMENTIMPORTANT: Refer to unit wiring label for actual unit wiringinformation.AHA —

Page 45

5Table 1 — Physical Data — 48TF004-007 LEGEND*Evaporator coil fin material/condenser coil fin material. Contact your localrepresentative f

Page 46

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 1

Page 48

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 1

Page 49

6Table 1 — Physical Data — 48TF004-007 (cont) LEGEND*Evaporator coil fin material/condenser coil fin material. Contact your localrepresen

Page 50 - Tab 1 a 6 a

7Fig. 6 — Base Unit DimensionsUNITSTD UNITWEIGHTDURABLADEECONOMIZER WEIGHTECONOMI$ERWEIGHT(A)CORNER WEIGHT(B)CORNER WEIGHT(C)CORNER WEIGHT(D)CORNER WE

Page 51

8Step 7 — Make Electrical ConnectionsFIELD POWER SUPPLY — All units except 208/230-vunits are factory wired for the voltage shown on the nameplate.

Page 52 - III. START-UP:

9RACEWAY LOW VOLTAGECONNECTIONSINTEGRATED GAS UNITCONTROLLER (IGC)HOLE IN END PANEL (HIDDEN)LEGENDFig. 9 — Power Wiring ConnectionsC—ContactorCOMP —Co

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