Carrier 48TF004-007 User Manual

Installation, Start-Up, and

Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS
INSTALLATION

Step 1 — Provide Unit Support

•ROOF CURB

• SLAB MOUNT

Step 2 — Field Fabricate Ductwork
Step 3 — In stall Exte rnal Trap for Condensate

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Drain

Step 4 — Rig and Place Unit

• POSITIONING

Step 5 — Install Flue Hood
Step 6 — Install Gas Piping
Step 7 — Make Electrical Connections

• FIELD POWER SUPPLY

• FIELD CONTROL WIRING

• HEA T ANTICIPATOR SETTINGS

Step 8 — Make Outdoor-Air Adjustments

and Install Outdoor-Air Hood

• MANUAL OUTDOOR-AIR DAMPER

• OPTIONAL DURABLADE ECONOMIZER

• OPTIONAL ECONOMI$ER

Step 9 — Adjust Evaporator-Fan Speed

• DIRECT-DRIVE MOTORS

• BELT-DRIVE MOTORS

ST ART-UP
SERVICE
TROUBLESHOOTING
START-UP CHECKLIST

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-38

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-43

. . . . . . . . . . . . . . . . . . . . . . . . . 44-49

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical compo­nents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance func­tions 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 precau­tions in the li terature, tag s and labels attached to t he 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.

. . . . . . . . . . . . . . . . . . . . . . 1

. . . . . . . . . . . . . . . . . . . 1

. . . . . . . . . . . . . . . 2

. . . . . . . . . . . . . . . . . . . . . 2

. . . . . . . . . . . . . . . . . . . . . . . 4

. . . . . . . . . . . . . . . . . . . . . . 4

. . . . . . . . . . . 8

. . . . . . . . . . . . . . . . . . 11

. . . . . . . . . 19

. . . . . . . . . . . . . . . . . . . . . . . .CL-1

48TF004-007

Single-Package Rooftop

Heating/Cooling Units

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 pres­sure greater than
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 cl osing
the gas valve.

Before performing service or maintenance operations on
unit, turn off main power switch to unit and install a lock­out tag. Electrical shock could cause personal injury.

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, 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 — Assemb le and install accessor y roof cu rb in
accordance with instructions shipped with curb. See Fig. 2. In­stall 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 connec­tions to the basepan in accordance with the accessory installa­tion instructions.

3

/4-in. pipe coupling and gas plate assembly to

1

/2 psig, it must be

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.

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

Book 1 4
Ta b 1 a 6 a

PC 111 Catalog No. 534-80000 Printed in U.S.A. Form 48TF-1SI Pg 1 8-00 Replaces: New

Fig. 1 — Horizontal Conversion Panels

Curb should be level. Unit leveling tolerances are shown in
Fig. 3. This is necessary for unit drain to function properly. Re­fer to Accessory Roof Curb Installation Instructions for addi­tional information as required.

SLAB MOUNT (Horizontal Units Only) — Provide a level
concrete slab that extends a minimum of 6 in. beyond unit
cabinet. Install a gravel apron in front of condenser coil air inlet
to prevent grass and foliage from obstructing airflow .

NOTE: Horizontal units may be installed on a roof curb if
required.

Step 2 — Field Fabricate Ductwork —

Secure all
ducts to roof curb and building structure on vertical ducted
units. Do not connect ductwork to unit. For horizontal applica-
tions, field-supplied flanges should be attached to horizontal
duct openings and all ductwork should be secured to the
flanges. Insulate and weatherproof all external ductwork,
joints, and roof openings with counter flashing and mastic in
accordance with applicable codes.

Ducts passing through an unconditioned space must be in-

sulated and covered with a vapor barrier.

If a plenum return is used on a vertical unit, the return
should be ducted through the roof deck to comply with applica­ble fire codes.

A minimum clearance is not required around ductwork.
Cabinet return air static shall not exceed –.20 in. wg with
EconoMi$er, –.35 in. wg with Durablade economizer, or
–.45 in. wg without economizer.

These units are designed for a minimum continuous heating
return-air temperature of 50 F (dry bulb), or an intermittent op­eration down to 45 F (dry bulb), such as when used with a night
set-back thermostat.

Step 3 — Install External Trap for Condensate
Drain —

located on the bottom and side of the unit. Unit discharge con­nections do not determine the use of drain connections; either
drain connection can be used with vertical or horizontal
applications.

The unit’s 3/4-in. condensate drain connections are

When using the standard side drain connection, make sure
the plug (Red) in the alternate bottom connection is tight before
installing the unit.

To use the bottom drain connection for a roof curb installa­tion, relocate the factory-installed plug (Red) from the bottom
connection to the side connection. See Fig. 4. The piping for
the condensate drain and external trap can be completed after
the unit is in place.

All units must have an external trap for condensate drain­age. Install a trap at least 4-in. deep and protect agai nst freez e­up. If drain line is installed downstream from the external trap,
pitch the line away from the unit at 1 in. per 10 ft of run. Do not
use a pipe size smaller than the unit connection (

Step 4 — Rig and Place Unit —

3

/4 in.).

Inspect unit for
transportation damage. File any claim with transportation
agency. Keep unit upright and do not drop. Spreader bars are
not required if top crating is left on unit. Rollers may be used to
move unit across a roof. Level by using unit frame as a refer­ence. See Table 1 and Fig. 5 for additional information.

Lifting holes are provided in base rails as shown in Fig. 6.

Refer to rigging instructions on unit.

All panels must be in place when rigging.

POSI TION I NG — Maintain clearance around and above unit
to provide minimum distance from combustible materials,
proper airflow, and service access. See Fig. 6. A properly posi­tioned unit will have the following clearances between unit and
roof curb:

1

/4-in. clearance between roof curb and base rails on
each side and duct end of unit; 1/4-in. clearance between roof
curb and condenser coil end of unit. (See Fig. 2, section C-C.)

Do not install unit in an indoor location. Do not locate unit
air inlets near exhaust vents or other sources of contaminated
air.

Be sure that unit is installed such that snow will not block

the combustion intake or flue outlet.

2

ROOF CURB

ACCESSORY

CRRFCURB001A00
CRRFCURB002A00

A UNIT SIZE

1′-2″
[356]

2′-0″
[610]

48TF004-007

NOTES:

1. Roof curb accessory is shipped disassembled.

2. Insulated panels.

3. Dimensions in [ ] are in millimeters.

4. Roof curb, galvanized steel.

5. Attach ductwork to curb (flanges of duct rest on curb).

6. Service clearance: 4 ft on each side.

7. Direction of airflow.

8. Connector packages CR BTMPWR001A00 and 002A00 a re for thru-the­curb connections. Packages CRBTMPWR003A00 and 004A00 are for
thru-the-bottom connections.

BC

11

1′-9

/16″

[551]

1′-4″
[406]

D AL T

DRAIN

HOLE

13/4″

[44.5]

“E”

GAS

3

/4″

[19] NPT

1

/2″

[12.7] NPT

3

/4″

[19] NPT

“F”

POWER

3

/4″ [19] NPT)

1

1

/4″ [31.7] CRBTMPWR002A00

3

/4″ [19] NPT
11/4″ [31.7] CRBTMPWR004A00

“G”

CONTROL

1

/2″

[12.7]

1

/2″

[12.7]

CONNECTOR

PKG. ACCY.

CRBTMPWR001A00

CRBTMPWR003A00

3

Fig. 2 — Roof Curb Dimensions

MAXIMUM ALLOWABLE

DIFFERENCE (in.)

A-B B-C A-C

0.5 1.0 1.0

Fig. 3 — Unit Leveling Tolerances

OTE: Drain plug is shown in factory-installed position.

Fig. 4 — Condensate Drain Connection

Unit may be installed directly on wood flooring or on

Class A, B, or C roof-covering material when roof curb is used.

Although unit is weatherproof, guard against water from

higher level runoff and overhangs.

Flue vent discharge must have a minimum horizontal clear­ance of 4 ft from electric and gas meters, gas regulators, and
gas relief equipment.

Minimum distance between unit and other electrically live
parts is 48 inches.

Flue gas can deteriorate building materials. Orient unit such

that flue gas will not affect building materials.

Adequate combustion-air space must be provided for proper
operation of this equipment. Be sure that 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) 54 TIA-54-84-1.
In Canada, installation must be in accordance with the
CAN1-B149 installation codes for gas burning appliances.

After unit is in position, remove rigging skids and shipping
materials.

Step 5 — Install Flue Hood —

Flue hood is shipped
screwed to the basepan beside the burner compa rtment access
panel. Remove from shipping location and using screws pro­vided, install flue hood and screen in location shown in Fig. 7.

Step 6 — Install Gas Piping —

Unit is equipped for
use with type of gas shown on nameplate. Refer to local build­ing codes, or in the absence of local codes, to ANSI Z223.1 en­titled National Fuel Gas Code. In Canada, installation must be
in accordance with the CAN1.B149.1 and CAN 1.B149.2 in­stallation codes for gas burning appliances.

For natural gas applications, gas pressure at unit gas con-

nection must not be less than 4 in. wg or greater than

13.0 in. wg while unit is operating. On 48TF005,006,007 high
heat units, the gas pressure at unit gas connection must not be
less than 5 in. wg or greater than 13 in. wg while the unit is op­erating. For propane applications, the gas pressure must not
be less than 5 in. wg or greater than 13 in. wg at the unit
connection.

Size gas supply piping for 0.5 in. wg maximum pressure
drop. Do not use supply pipe smaller than unit gas connection.
Support gas piping as shown in the table in Fig. 8. For exam-

3

ple, a

/4-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 2 support beams, a 48-ft long pipe would have a
minimum of 6 support beams.

See Fig. 8 for typical pipe guide and locations of external

manual main shutoff valve.

NOTES:

1. Dimensions in ( ) are in millimeters.

2. Hook rigging shackles thr ough holes in base rail, as shown in d etail “A.’
Holes in base rails are centered around the unit center of gravity. Use
wooden top skid when rigging to prevent rigging straps from damaging unit.

UNIT

48TFE,TFF,TFM,TFN004 510 231
48TFD,TFE,TFF ,TFL,TFM,TFN005 520 236
48TFD,TFE,TFF ,TFL,TFM,TFN006 540 245

48TFD,TFE,TFF007 615 279

MAX WEIGHT “A” “B” “C”
Lb Kg in. mm in. mm in. mm

Fig. 5 — Rigging Details

3. Unit weights do not include economizer. See Table 1 for economizer
weights.

All panels must be in place when rigging.

73.69 1872 37.50 953 33.35 845

4

Table 1 — Physical Data — 48TF004-007

UNIT SIZE 48TF E/F/M/N004 D/E/F/L/M/N005 D/E/F/L/M/N006 D/E/F007
NOMINAL CAPACITY (tons) 3456
OPERATING WEIGHT (lb)

Unit

Al/Al* 460 470 490 565
Al/Cu* 465 476 497 576
Cu/Cu* 468 482 505 587

Economizer

Durablade 34 34 34 34
EconoMi$er 47 47 47 47

Roof Curb† 115 115 115 115

COMPRESSOR Reciprocating

Quantity 1111
No. Cylinders (per Circuit) 2222
Oil (oz) 50 50 50 54

REFRIGERANT TYPE R-22

Expansion Device Acutrol™ Metering Device
Operating Charge (lb-oz)

Circuit 1 4-4 6-6 6-14 9-0
Circuit 2 ————

CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced Fins

Rows...Fins/in. 1...17 2...17 2...17 2...17
Total Face Area (sq ft) 8.36 8.36 10.42 10.42

CONDENSER FAN Propeller Type

Nominal Cfm 3500 4000 4000 4000
Quantity...Diameter (in.) 1...22.0 1...22.0 1...22.0 1...22.0
Motor Hp...Rpm
Watts Input (Total) 325 325 325 325

EVAPORATOR COIL Enhanced Copper Tubes, Aluminum Double-Wavy Fins

Rows...Fins/in. 2...15 2...15 3...15 4...15
Total Face Area (sq ft) 4.17 5.5 5.5 5.5

EVAPORATOR FAN Centrifugal Type

Quantity...Size (in.) Std 1...10 x 10 1...10 x 10 1...11 x 10 1...10 x 10

Type Drive Std Direct Direct Direct Belt

Nominal Cfm 1200 1600 2000 2400
Maximum Co ntinuous Bhp Std .34 .75 1.20 2.40

Motor Frame Size Std 48 48 48 56

Nominal Rpm High/Low Std 860/800 1075/970 1075/970 —

Fan Rpm Range Std — — — 1070-1460

Motor Bearing Type Ball Ball Ball Ball
Maximum Allowable Rpm 2100 2100 2100 2100
Motor Pulley Pitch Diameter Min/Max (in.) Std — — — 2.8/3.8

Nominal Motor Shaft Diameter (in.) Std

Fan Pulley Pitch Diameter (in.) Std ———4.5

Belt, Quantity...Type...Length (in.) Std — — — 1...A...40

Pulley Center Line Dis tance (in.) Std — — — 14.7-15.5

Speed Change per Full Turn of Std ———80

Movable Pulley Flange (rpm) Alt 48 70 80 —

Movable Pulley Maximum Full Turns Std ——— 5

From Closed Position Alt 555—

Factory Setting Std ——— 3

Factory Speed Setting (rpm) Std ———1225

Fan Shaft Diameter at Pulley (in.)

Alt 1...10 x 10 1...10 x 10 1...10 x 10 —
High-Static 1...10 x 10 1...10 x 10 1...11 x 10 1...10 x 10

Alt Belt Belt Belt —
High-Static Belt Belt Belt Belt

Alt 1.00 1.00 1.30/2.40** —
High-Static 2.40 2.40 2.90 2.90

Alt 48 48 56 —
High-Static 56 56 56 56

Alt 1620 1620 1725 —
High-Static 1725 1725 1725 1725

Alt 760-1000 835-1185 900-1300 —
High-Static 1075-1455 1075-1455 1300-168 5 1300-1685

Alt 1.9/2.9 1.9/2.9 2.4/3.4 —
High-Static 2.8/3.8 2.8/3.8 3.4/4.4 3.4/4.4

Alt
High-Static

Alt 4.5 4.0 4.5 —
High-Static 4.5 4.5 4.5 4.5

Alt 1...A...34 1...A...34 1...A...39 —
High-Static 1...A...39 1...A...39 1...A...40 1...A...40

Alt 10.0-12.4 10.0-12.4 14.7-15.5 —
High-Static 10.0-12.4 10.0-12.4 14.7-15.5 14.7-15.5

High-Static 65 65 60 60

High-Static 6655
Alt 333—

High-Static 3
Alt 856 975 1060 —

High-Static 1233 1233 1396 1396

LEGEND

Al — Aluminum
Bhp — Brake Horsepower
Cu — Copper

*Evaporator coil fin material/co ndenser coil fin material. Cont act your local

representative for details about coated fins.

†Weight of 14-in. roof curb.

**Single phase/three-phase.

1

/4...1100

1

/

1

/

5

/

1

5

/

1

/4...1100

1

31/

/

2

1

/

2

5

/

8

2

5

/

8

2
2
8

/

2

8

††Rollout switch lockout is manually reset by interrupting power to unit or

resetting thermostat.

|| Single- phase unit s have a single-st age gas valve. The heating in put values

are as follows:

48TFF004, 115,000 Btuh
48TFF005, 150,000 Btuh
48TFF006, 150,000 Btuh

1

/4...1100

1

/

5

/

5

/

31/

5

/

2
8
8

2

8

NOTE: High-static motor not available on single-phase units.

Scroll

1

/4...1100

5

/

—

5

/

31/

5

/

8

8

2

8

5

Table 1 — Physical Data — 48TF004-007 (cont)

UNIT SIZE 48TF E/F/M/N004 D/E/F/L/M/N005 D/E/F/L/M/N006 D/E/F007
FURNACE SECTION

Rollout Switch Cutout
Temp (F)†† 195 195 195 195
Burner Orifice Diameter

(in. ...drill size)

Natural Gas Std TFD — .113...33 .113...33 .113...33

Liquid Propane Alt TFD — .089...43 .089...43 .089...43

Thermostat Heat Anticipator
Setting (amps)

208/230 v and 575 Stage 1 .14 .14 .14 .14
460 v Stage 1 .14 .14 .14 .14

Gas Input (B tuh)|| Stage 1 TFD — 72,000 72,000 72,000

Efficiency (Steady

State) (%) 80 80 80 80

Temperature Rise Range TFD — 25-55 25-55 25-55

Manifold Pressure (in. wg)

Natural Gas Std 3.5 3.5 3.5 3.5
Liquid Propane Alt 3.5 3.5 3.5 3.5

Gas Valve Quantity 1111
Gas Valve Pressure Range

Psig 0.180-0.487 0.180-0.487 0.180-0.487 0.180-0.487
in. wg 5.0-13.5 5.0-13.5 5.0-13.5 5.0-13.5

Field Gas Connection
Size (in.)

HIGH-PRESSURE SWITCH (psig)

Standard Com p ressor 450 ± 50 500 ± 50
Internal Relief (Differential)
Cutout 428 428
Reset (Auto.) 320 320

LOSS-OF-CHARGE (LOW­PRESSURE SWITCH) (psig)

Cutout
Reset (Auto.) 22 ± 7

FREEZE PROTECTION
THERMOSTAT (F)

Opens 30 ± 5
Closes 45 ± 5

OUTDOOR-AIR INLET SCREENS Cleanable

Quantity...Size (in.) 1...20 x 24 x 1

RETURN-AIR FILTERS Throwaway

Quantity...Size (in.) 2...16 x 25 x 2

Stage 2 .14 .14 .14 .14
Stage 2 .14 .14 .14 .14

Stage 2
(3-phase units)

LEGEND

Al — Aluminum
Bhp — Brake Horsepower
Cu — Copper

*Evaporator coil fin material/co ndenser coil fin material. Cont act your local

representative for details about coated fins.

†Weight of 14-in. roof curb.

**Single phase/three-phase.

TFE .113...33 .113...33 .113...33 .113...33
TFF .113...33 .129...30 .129...30 .129...30
TFL — .102...38 .102...38 —
TFM .102...38 .102...38 .102...38 —
TFN .102...38 .116...32 .116...32 —

TFE .089...43 .089...43 .089...43 .089...43
TFF .089...43 .102...38 .102...38 .102...38
TFL — .082...45 .082...45 —
TFM .082...45 .082...45 .082...45 —
TFN .082...45 .089...43 .089...43 —

TFE 72,000 115,000 115,00 0 115,000
TFF 82,000 120 ,000 120,000 120,000
TFL — 60,000 60,000 —
TFM 60,000 90,000 90,000 —
TFN 90,000 120,000 120,000 —

TFF 115,000 150,000 150,000 150,000

TFE 25-55 35-65 35-65 35-65
TFF 55-85 50-80 50-80 50-80
TFL — 20-50 20-50 —
TFM 20-50 30-60 30-60 —
TFN 30-60 40-70 40-70 —

1

/

2

1

/

2

1

/

2

1

/

2

7 ± 3

††Rollout switch lockout is manually reset by interrupting power to unit or

resetting thermostat.

|| Single-phase units have a single-stage gas valve. The heating input values

are as follows:

48TFF004, 115,000 Btuh
48TFF005, 150,000 Btuh
48TFF006, 150,000 Btuh

NOTE: High-static motor not available on single-phase units.

6

STD UNIT

UNIT

48TFN,TFM,TFF,TFE004
48TFN,TFM,TFL,TFF,TFE,TFD005
48TFN,TFM,TFL,TFF,TFE,TFD006

48TFF,TFE,TFD007

CONNECTION SIZES

3

1

/

Dia. [35] Field Power Supply Hole

A
B
C
D
E
F

NOTES:

1. Dimen s ions in [ ] are in millimeters.

″

8

2″ Dia. [51] Power Supply Knockout

1

/

2

Dia. [64] Power Supply Knockout

″

2

7

/

Dia. [22] Field Control Wiring Hole

″

8

3

/

-14 NPT Condensate Drain

″

4

1

/

-14 NPT Gas Connection

″

2

WEIGHT

Lbs Kg Lbs Kg Lbs Kg Lbs Kg Lbs Kg Lbs Kg Lbs Kg

460 209
470 213 142 64.4 106 48.1 162 73.5 60 27.2 1′-10
490 222 150 68.0 115 52.2 160 72.6 65 29.5 1′-0
565 256 165 74.8 136 61.7 200 90.7 64 29.0 1′-0

2. Center of Gravity.

3. Direction of Airflow.

4. On vertical discharge units, ductwork to be attached to accessory
roof curb only. For horizontal discharge units, field-supplied flanges
should be attached to horizontal discharge openings, and all duct­work should be attached to the flanges.

5. Minimum clearance (local codes or jurisdiction may prevail):
a. Between unit, flue side and combustible surfaces, 36 inches.
b. Bottom of unit to combustible surfaces (when not using curb)

1 inch. Bottom of base rail to combustible surfaces (when not
using curb) 0 inches.

c. C ondenser coil for proper airflow, 36 in. one side, 12 in. the other.

The side getting the greater clearance is optional.
d. Overhead, 60 in. to assure proper condenser fan operation.
e. Between units, control box side, 42 in. per NEC (National Electri-

7

cal Code).
f. Between unit and ungrounded surfaces, control box side, 36 in.

per NEC.
g. Between unit and block or concrete walls and other grounded sur-

faces, control box side, 42 in. per NEC.
h. Horizontal supply and return end, 0 inches.

6. With the exception of the clearance for the condenser coil and com­bustion side as stated in Note 5a, b, and c, a removable fence or bar­ricade requires no clearance.

7. Units may be installed on combustible floors made from wood or
Class A, B, or C roof covering material if set on base rail.

8. The vertical center of gravity is 1′-6″ [457] up from the bottom of the
base rail.

DURABLADE

ECONOMIZER WEIGHT

ECONOMI$ER

WEIGHT

34 15.4 47 21.3

(A)

CORNER WEIGHT

(B)

CORNER WEIGHT

(C)

CORNER WEIGHT

(D)

CORNER WEIGHT

140 63.5 105 47.6 159 72.1 56 25.4 1′-10

“A”

PANEL

LENGTH

3

/

[568.0]

″

8

3

/

[568.0]

″

8

3

/

[315.0]

″

8

3

/

[315.0]

″

8

BOTTOM POWER CHART,

THESE HOLES REQ’D FOR USE

WITH ACCESSORY PACKAGES —

CRBTMPWR001A00, 3A00 (

THREADED

CONDUIT

SIZE

1

″

/

2

3

″

/

4

1

″

FPT

/

2

WIRE

USE

24 V

Power 1

Gas 1

1

/2″, 3/4″)

REQ’D HOLE

SIZES
(Max.)

7

/

″

8

1

/

8

1

/

4

[22.2]

[28.4]

″

[31.8]

″

Fig. 6 — Base Unit Dimensions

Step 7 — Make Electrical Connections

BLOWER
ACCESS
PANEL

LEGEND

NFGC —

National Fuel Gas Code
*Field supplied.
NOTE: Follow all local codes.

SPACING OF SUPPORTS

Fig. 8 — Gas Piping Guide (With Accessory

Thru-the-Curb Service Connections)

STEEL PIPE

NOMINAL DIAMETER

(in.)

X

DIMENSIONS

(feet)

1

/

2

6

3

/4 or 1

8

11/4 or larger

10

Fig. 7 — Flue Hood Details

Unit cabinet must have an uninterrupted, unbroken electri­cal ground to minimize the possibility of personal injury if
an electrical fault should occur. This ground may consist of
electrical wire connected to unit ground lug in control com­partment, or conduit approved for electrical ground when
installed in accordance with NEC (National Electrical
Code), ANSI/NFPA, latest edition, and local electrical
codes. Do not use gas piping as an electrical ground. Fail-
ure to follow this warning could result in the installer being
liable for personal injury of others.

FIELD POWER SUPPLY — All units except 208/230-v
units are factory wired for the voltage shown on the nameplate.
If the 208/230-v unit is to be connected to a 208-v power sup­ply, the transformer must be rewired by moving the black wire
with the
nection and moving to the 200-volt
primary side of the transformer.

tails are provided for field wire connections. Use factory­supplied splices or UL (Underwriters’ Laboratories) approved
copper/aluminum connector .

requirements.
Install field wiring as follows:

within voltage range indicated on unit nameplate (see Table 2).
On 3-phase units, voltages between phases must be balanced
within 2% and the current within 10%. Use the formula shown
in the legend for Table 2, Note 2 to determine the percent of
voltage imbalance. Operation on improper line voltage or ex­cessive phase imbalance constitutes abuse and may cause dam­age to electrical components. Such operation would invalidate
any applicable Carrier warranty.

FIELD CO NTROL WIRING — Install a Carrier-approved
accessory thermostat assembly according to installation
instructions included with the acc essory. Locate thermostat as­sembly on a solid wall in the conditioned space to sense ave r­age temperature in accordanc e with thermostat ins tallation in­structions. Connect thermostat wires to terminal board.

wire from subbase terminals through connector on unit to low­voltage connections (shown in Fig. 10).

NOTE: For wire runs up 50 ft, use no. 18 AWG (American
Wire Gage) insulated wire (35 C minimum). For 50 to 75 ft,
use no. 16 AWG insulated wire (35 C minimum). For over
75 ft, use no. 14 AWG insulated wire (35 C minimum). All
wire larger than no. 18 AWG cannot be directly connected to

1

/4-in. female space connector from the 230-volt con-

1

/4-in. male terminal on the

Refer to unit label diagram for additional information. Pig-

When installing units, provide a disconnect per the NEC.
All field wiring must comply with NEC and local

1. Install conduit through side panel openings. For units
without electric heat, install conduit between disconnect
and control box.

2. Install power lines to terminal connections as shown in
Fig. 9.

Voltage to compressor terminals during operation must be

Route thermostat cable or equivalent single leads of colored

the thermostat and will require a junction box and splice at the
thermostat.

Pass the control wires through the hole provided in the cor­ner post; then feed wires through the raceway built into the
corner post to the 24-v barrier located on the left side of the
control box. See Fig. 11. The raceway provides the UL re­quired clearance between high- and low-voltage wiring.

HEAT ANTICIPATOR SETTINGS — Set heat anticipator
settings at .14 amp for the first stage and .14 amp for second­stage heating, when available.

8

RACEWAY LOW VOLTAGE

CONNECTIONS

INTEGRATED GAS UNIT
CONTROLLER (IGC)

HOLE IN END PANEL (HIDDEN)

208/230-1-60

208/230-3-60

460-3-60

(SIZE 007 ONLY)

LEGEND

C—
COMP —
NEC —
TB —

575-3-60

(SIZE 007 ONLY)

Contactor
Compressor
National Electrical Code
Terminal Block

208/230-3-60

575-3-60, 460-3-60

(SIZES 004-006)

Fig. 9 — Power Wiring Connections

AHA —

NOTES:

1. Connect Y2 when unit is equipped with an economizer.

2. Connect W2 when unit is equipped with two stages of heat.

Adjustable Heat Anticipator
Field Wiring
Factory Wiring

Fig. 10 — Low-Voltage Connections

LEGEND

Fig. 11 — Field Control Wiring Raceway

9

Table 2 — Electrical Data

UNIT
48TF

NOMINAL

V-Ph-Hz

208/230-1-60

VOLTAGE

IFM

TYPE

RANGE

Min Max RLA LRA Qty Hp FLA MCA MOCP† FLA LRA

Std

187 254 16.2 96.0 1

Alt 4.9 26.6/26.6 35/35 26/26 111/111

COMPRESSOR

(ea)

Std

208/230-3-60

187 254 10.2 75.0 1

Alt 4.9 19.1/19.1 25/25 19/19 90/90

High 5.2 19.4/19.4 25/25 19/19 109/109

004

460-3-60

Std

Alt 2.1 8.4 15 8 48/48

414 508 4.4 40.0 1

High 2.6 8.9 15 9 57/57

Std

575-3-60

Alt 2.1 6.9 15 8 37

518 632 3.7 31.0 1

High 2.6 7.3 15 7 45

208/230-1-60

Std

187 254 23.3 118.0 1

Alt 4.9 35.4/35.4 45/45 34/34 133/133

Std

208/230-3-60

187 254 15.4 90.0 1

Alt 4.9 25.6/25.6 30/30 25/25 105/105

High 5.2 25.9/25.9 30/30 25/25 124/124

005

460-3-60

Std

Alt 2.1 13.3 20 13 53

414 508 8.3 45.0 1

High 2.6 13.8 20 13 62

Std

575-3-60

Alt 2.1 10.3 15 11 42

518 632 6.4 36.0 1

High 2.6 10.7 15 10 50

208/230-1-60

Std

187 254 28.8 147 1

Alt 6.6 44.0/44.0 60/60 42/42 184/184

Std

208/230-3-60

187 254 16.3 114 1

Alt 5.2 26.6/26.6 35/35 26/26 148/148

High 7.5 28.9/28.9 35/35 29/29 174/174

006

460-3-60

Std

Alt 2.6 12.7 15 12 81

414 508 7.4 64 1

High 3.4 13.5 20 13 94

Std

575-3-60

Alt 3.0 10.5 15 10 66

518 632 6.2 62 1

High 3.4 12.6 15 11 76

Std

187 254 23.6 146 1

High 7.5 32.5/32.5 40/40 32/32 205/205

Std

414 508 10.6 73 1

High 3.4 16.1 20 16 103

Std

518 632 8.5 58.4 1

High 3.4 12.9 20 14 82

007

208/230-3-60

460-3-60

575-3-60

LEGEND

FLA — Full Load Amps
HACR — Heating, Air Conditioning and Refrigeration
IFM — Indoor (Evaporator) Fan Motor
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
NEC — National Electrical Code
OFM — Outdoor (Condenser) Fan Motor
RLA — Rated Load Amps

*Used to determine minimum disconnect per NEC.

†Fuse or HACR circuit breaker.

NOTES:

1. In compliance with NEC requirements for multimotor and combination
load equipment (refer to NEC Articles 430 and 440), the overcurrent
protective device for th e uni t sha ll be f use o r HA CR br eak er. Canadian
units may be fuse or circuit breaker.

2.

Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is
greater than 2%.

of voltage imbalance.

Use the following formula to determine the percent

% Voltage Imbalance

= 100 x

max voltage dev i ation from average voltage

average voltage

OFM

(ea)

1

/41.4

1

/41.4

1

/40.8

1

/40.8

1

/41.4

1

/41.4

1

/40.8

1

/40.8

1

/41.4

1

/41.4

1

/40.8

1

/40.8

1

/41.4

1

/40.6

1

/40.6

IFM

FLA

3.5

3.5

COMBUSTION

FAN MOTOR

FLA

.6

POWER
SUPPLY

24.5/24.5 30/30 23/23 106/106

17.7/17.7 25/25 17/17 85/85

DISCONNECT

SIZE*

.6

1.3

7.6 15 7 48/48

.3

1.3

6.3 15 7 35

.3

3.5

3.5

.6

34.0/34.0 40/40 32/32 129/129

24.2/24.2 30/30 23/23 101/101

.6

1.8

13.0 20 13 51

.3

1.8

10.1 15 10 41

.3

5.9

5.9

.6

43.3/43.3 60/60 42/42 161/161

27.3/27.3 35/35 29/29 128/128

.6

3.1

13.2 20 13 72

.3

3.1

10.9 15 11 58

.3

5.2

2.6

2.6

.6

.3

.3

30.2/30.2 35/35 29/29 180/180

15.4 20 15 90

12.3 15 13 72

Example: Supply voltage is 460-3-60.

AB = 452 v
BC = 464 v
AC = 455 v

Average Voltage =

Determi ne maximum deviation from average volt ag e.

(AB) 457 – 452 = 5 v
(BC) 464 – 457 = 7 v
(AC) 457 – 455 = 2 v

452 + 464 + 455

1371

=

3

= 457

3

Maximum deviation is 7 v.
Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

7

457

= 1.53%

This amount of phase imbalance is satis f act ory as it is below t he max­imum allowable 2%.

IMPORTANT:

than 2%, contact your loca l electric utility company immediately.

If the supply voltage phase imbalance is more

10

Step 8 — Make Outdoor-Air Adjustments and

Fig. 14 — Outdoor-Air Damper with

Hood Att ached

Fig. 15 — Position Setting

Install Outdoor-Air Hood

MANUAL OUTDOOR-AIR DAMPER — The outdoor-air
hood and screen are attached to the basepan at the bottom of
the unit for shipping.

Assembly:

1. Determine quantity of ventilation required for building.
Record amount for use in Step 8.

2. Remove and save outdoor air opening panel and screws.
See Fig. 12.

3. Separate hood and screen from basepan by removing the
4 screws securing them. Save all screws.

4. Replace evaporator coil access panel.

OUTDOOR
AIR OPENING
PANEL

3 SCREWS
(SIDE)

5. Place hood on front of outdoor air opening panel. See
Fig. 13 for hood details. Secure top of hood with the
4 screws removed in Step 3. See Fig. 14.

6. Remove and save 6 screws (3 on each side) from sides of
the manual outdoor-air damper.

7. Align screw holes on hood with screw holes on side of
manual outdoor-air damper. See Fig. 13 and 14. Secure
hood with 6 screws from Step 6.

8. Adjust minimum position setting of the damper blade by
adjusting the manual outdoor-air adjustment screws on
the front of the damper blade. See Fig. 12. Slide blade
vertically until it is in the appropriate position determined
by Fig. 15. Tighten screws.

9. Remove and save screws currently on sides of hood. In­sert screen. Secure screen to hood using the screws. See
Fig. 14.

Fig. 12 — Damper Panel with Manual Outdoor-Air

Damper Installed

Fig. 13 — Outdoor-Air Hood Details

11

OPTIONAL DURABLADE ECONOMIZER — The op-

Fig. 16 — Typical Access Panel Locations

Fig. 17 — Outdoor-Air Hood Details

Fig. 18 — Horizontal Durablade Economizer

Installation

tional economizer hood assembly is packaged and shipped in
the filter section. Damper blades and control boards are in­stalled at the factory and the economizer is shipped in the verti­cal discharge position.

NOTE: Horizontal discharge block-off plate is shipped with
the air hood package. If unit is to be used for vertical discharge
application, discard this plate.

Assembly:

1. Determine if ventilation air is required in building. If so,
determine minimum amount to be supplied by each unit
and record quantity of ventilation air needed for use in
Step 6.

2. Remove filter access panel by raising panel and swinging
panel outward. Panel is now disengaged from track and
can be removed. No tools are required to remove filter
access panel. Remove outdoor-air opening panel. Save
panels and screws. See Fig. 16. Remove optional
outdoor-air damper hood package from filter section.

3. Assemble outdoor-air hood top and side plates as shown
in Fig. 17. Install seal strips on hood top and sides. Put
aside screen retainer and screws for later assembly. Do

not attach hood to unit at this time.

4. To convert to horizontal discharge application:
a. Rotate economizer 90 degrees until the

economizer motor faces the condenser section
(see Fig. 18).

b. Rotate the barometric relief damper hinge

90 degrees. Barometric relief damper should open
vertically to operate properly.

c. Install horizontal discharge block-off plate over

the opening on the access panel. (Block-off plate
MUST be installed before installing hood assem­bly.) See Fig. 19.

5. Insert economizer plug into economizer harness. Remove
tape from barometric relief damper. See Fig. 20.

6. If ventilation air is not required, proceed to St ep 7. If ven­tilation air is required, determine minimum position set­ting for required airflow. See Fig. 21. Adjust minimum
position setting by adjusting the screws on the position
setting bracket. Slide bracket until the top screw is in the
position determined by Fig. 21. Tighten screws.

7. Remove tape from outdoor-air thermostat (OAT). Fasten
OAT to inside of hood using screws and speed c lips pro­vided. See Fig. 22. Make sure OAT terminals are posi­tioned up.

8. Replace outdoor-air opening panel using screws from
Step 2. Replace filter a ccess panel. Ensure the filter ac ­cess panel slides along the tracks and is securely engaged.

9. Fasten hood top and side plate assembly (Fig. 17) to
outdoor-air opening panel with screws provided.

10. Place knob supplied with economizer on OAT. See
Fig. 22. Set for 3° F below indoor room thermostat set­ting. If accessory enthalpy control (EC) is used in place of
OAT, see instructions shipped with EC for installation
and adjustment. See Fig. 22.

11. Connect OAT per Fig. 23.

12. Slide outdoor-air inlet screen into screen track on hood
side plate. While holding screen in place, fasten screen re­tainer to hood using screws provided.

NOTE: Refer to Fig. 24 for economizer barometric relief
damper characteristics.

ECONOMIZER
CONTROL
BOARD

BAROMETRIC
RELIEF
DAMPER

ECONOMIZER
PLUG

SHIPPING
SCREW

ECONOMIZER
MOTOR

12

BLOCK-OFF PLATE

MINIMUM

POSITION

OPEN

3

1

T

P

P1

T1

4

2

5

S

S

O

D

C

TR

B

REV.B

198818A

%

H

U

M

I

D

I

T

Y

90

70

60

30

10

D
C

B
A

60
65
70

75

55

50

85

80

DAMPER

DAMPER

CLOSED

OPEN

OUTDOOR TEMP

.

°

F

REV

.

97-3672

CW–SETPOINTS–CCW

CONT

A
CTS SHO

WN IN HIGH ENTHALPY

RUSH

AT 24V

AC

3 mA

MIN. A

T 1

1 VDC

CONT

ACT RA

TINGS: 1.5A

RUN, 3.5A IN

OR UNPOWERED ST

A
TE

1

2

3

TR

TR1

24V

AC

ENTHALPY CONTROL

ENTHALPY
CONTROL

HOOD

Fig. 22 — Outdoor-Air Thermostat/

Enthalpy Control Installation

Fig. 19 — Horizontal Discharge Block-Off Plate

U-SHAPED
HOLE
(NOT
SHOWN)

ECONOMIZER
CONTROL
BOARD

ECONOMIZER
PLUG

WIRING
HARNESS

BAROMETRIC
RELIEF DAMPER

SHIPPING
SCREW

ECONOMIZER
MOTOR

POSITION SETTING
BRACKET

TOP
SCREW

Fig. 20 — Durablade Economizer Installed in Unit

EXAMPLE:

Given —Negative Pressure. . . . . . . . . . . . . . . . . . . . . . .0.2 in. wg

Determine — Setting = 5 in.

Outdoor Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 900 cfm

Fig. 21 — Durablade Economizer

Minimum Position Setting

13

OUTDOOR AIR
OPENING PANEL

SEAL STRIP

EXHAUST AIR SCREEN

EXHAUST AIR
HOOD TOP

SCREEN
RETAINER

EXHAUST AIR
HOOD SIDES

EXHAUST AIR
BOTTOM BRACKET

Fig. 26 — Typical Access Panel Locations

Fig. 27 — Exhaust Air Hood Assembly

LEGEND

Outdoor-Air Thermostat

OAT —

NOTE: See unit wiring diagram for details.

Fig. 23 — Wiring Connections for

Outdoor-Air Thermostat

ECONOMI$ER
PLUG

CONTROLLER

GEAR-DRIVEN
DAMPER

OUTDOOR AIR
TEMPERATURE
SENSOR

ACTUATOR

0.90

0.80

0.70

0.60

0.50

0.40

0.30

PRESSURE DROP (in. wg)

0.20

0.10

0.00

200 300 400

100

CFM

Fig. 24 — Durablade Economizer

Barometric Relief Damper Characteristics

OPTIONAL ECONOMI$ER — See Fig. 25 for EconoMi$er
component locations.

1. To remove the existing unit filter access panel, raise the
panel and swing the bottom outward. The panel is now
disengaged from the track and can be removed. Remove
the indoor coil access panel and discard. See Fig. 26.

If installing an optional Power Exhaust Assembly, refer to
the EconoMi$er Power Exhaust Installation Instructions.

Controller should be mounted in vertical position as
shown in Fig. 25.

2. Assemble the hood assembly as follows:
Remove the EconoMi$er hood from its packaging. Re-

move shipping brackets holding hood package to
EconoMi$er. Locate the outdoor-air opening panel. See
Fig. 27. Remove hood assembly shipping brackets locat­ed on the back (sloped) side of the EconoMi$er assembly.
These brackets are used to retain the hood assembly dur­ing shipping only.

3. Installs the
side panels and the bottom bracket. Assemble the exhaust

1

/8 x 3/4-in. seal strip on the exhaust air hood

air hood to the outdoor-air opening panel as shown in
Fig. 27, using the screws provided. Do not attach hood
assembly to unit at this time.

4. Install the
top and side panels. Assemble the outdoor-air hood to the
outdoor-air opening panel as shown in Fig. 28, using the
screws provided. Do not attach hood assembly to the uni t

1

/8 x 3/4-in. seal strip on the outdoor-air hood

at this time.

500 600

700

800

BAROMETRIC RELIEF DAMPERS

Fig. 25 — EconoMi$er Component Locations

OUTDOOR-AIR
OPENING PANEL

FILTER ACCESS
PANEL

14

5. Slide the outdoor-air inlet screens into the screen track on

ECONOMI$ER

ECONOMI$ER REAR
FLANGE

UNIT BASE

UNIT FILTER
RACK

ECONOMI$ER CLIP
HVAC UNIT

WIRING
HARNESS

OUTDOOR
AIR
BLOCK-OFF
PLATE

Fig. 29 — Completed Hood Assembly

Fig. 30 — Rear EconoMi$er Flange Installation

Fig. 31 — EconoMi$er Installed

the hood side panels. While holding the screens in place,
fasten the screen retainer to the hood using the screws
provided. Repeat the process for the barometric exhaust
air screen. Do not attach completed (Fig. 29) hood as-
sembly to unit at this time .

6. Slide the EconoMi$er assembly into the rooftop uni t. S ee
Fig. 30 and 31.

NOTE: Be sure to engage rear EconoMi$er flange under
tabs in return-air opening of the unit base. See Fig. 30.

7. Install the outdoor-air block-off plate, then secure the
EconoMi$er with the screws provided. See Fig. 31.

8. Remove and discard the 12-pin jumper pl ug from the unit
wiring harness located in the upper left corner and insert
the EconoMi$er plug into the unit wiring harness. Refer
to wiring diagram Fig. 32 and 33. Also refer to Fig. 34 if
installing an accessory power exhaust.

9. Install the complete hood assembly on the unit and secure
using the screws provided.

10. Remove the indoor fan motor access panel. See Fig. 35.

11. Mount the supply-air temperature sensor to the lower left
portion of the indoor blower housing with the two (2)
screws provided (see Fig. 36). Connect the violet and
pink wires to the corresponding connections on the
supply-air temperature sensor. Replace the indoor fan
motor access panel.

OUTDOOR AIR
OPENING
PANEL

ASSEMBLED
EXHAUST HOOD

SEAL STRIP

SEAL STRIP

OUTDOOR AIR
HOOD SIDES

Fig. 28 — Outdoor-Air Hood Assembly

OUTDOOR AIR
HOOD TOP

SCREEN
RETAINER

OUTDOOR AIR
INLET
SCREENS

15

OAT —
RAT —

LEGEND

Outdoor-Air Tem perature
Return-Air T emper ature

Fig. 32 — EconoMi$er Wiring

ECONOMI$ER
CONTROLLER

OAT

COM

OAH

-15 V
RAT

COM

RAH

+15 V

(+)

CO

2

COM

CO

2

DAT

COM

REM POT

COM

LED

COM

BROWN
VIOLET

WHITE

RED

BROWN
VIOLET

WHITE
RED

SUPPLY AIR

TEMPERATURE SENSOR

PINK
VIOLET

TEMP

TEMP

TEMP

TEMP

COM
OUT
PWR

TEMP
TEMP
COM

OUT
PWR

CO

SENSOR

2

V+

COM VAC

OUTDOOR
AIR
SENSOR

RETURN
AIR
SENSOR

24

Fig. 33 — EconoMi$er Sensor Wiring

16