Carrier 48TFD008-014, 48TFE008-014, 48TFF008-012 User Manual

Single-Package Rooftop Heating/Cooling Units

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 — Install External Trap for

Condensate Drain

Step 4 — Rig and Place Unit

• POSITIONING

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

• FIELD POWER SUPPLY

• FIELD CONTROL WIRING

• HEA T ANTICIPATOR SETTINGS

Step 8 — Adjust Factory-Installed Options

• APOLLO CONTROL

• MANUAL OUTDOOR-AIR DAMPER

• OPTIONAL DURABLADE ECONOMIZER

• OPTIONAL ECONOMI$ER

Step 9 — Adjust Evaporator-Fan Speed START-UP SERVICE TROUBLESHOOTING START-UP CHECKLIST

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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. . . . . . . . . . . . . . . . . . . . . . . . . 42-46

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, ta gs and label s attached t o the uni t, and other safety precautions that may 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

1-33

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

48TFD008-014

48TFE008-014

48TFF008,012

50 Hz

Disconnect gas piping from unit when leak testing at pressure greater than 3.4 kPa (1/2 psig).

Before performing service or maintenance operations on unit, turn off main power swit ch to unit. Electrical shock could cause personal injury.

Unit is shipped in the vertical discharge 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.

Step 1 — Provide Unit Support

ROO F CU R B — Assemble and instal l acces sory roof curb 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. If gas, electric power or control power is to be routed through the curb, attach the accessory thru-the-curb service connection plates to the roof curb in accordance with the accessory installation instructions. Connection plates must be installed before unit is set in roof curb.

IMPORTANT: The gasketing of th e 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 also result in air leaks and poor unit

performance.

Curb should be level. Unit leveling tolerances a re 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.

Pressures greater than 3.4 kPa (1/2 psig) will cause gas valve damage resulting in hazardous condition. If gas valve is ever subjected to pressure greater than 3.4 kPa ( replaced before use. When pressure testing field-supplied gas piping at pressures of 3.4 kPa

(

/2 psig) or less, a unit connected to such piping must be isolated by manually closing the gas valve(s).

psig), it must be

INSTALLATION

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

Catalog No. 004-816 Printed in U.S.A. Form 48TF-C1SI Pg 1 1-01 Replaces: New

SLAB MOUNT (Horizontal Units Only) — Provide a level concrete slab that extends a minimum of 152 mm (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 —

ducts to roof curb and building structure on vertical units. Do not connect ductwork to unit. For horizontal applications, field-

supplied flanges should be attached to horizontal discharge openings and all ductwork 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 –87 Pa (–.35 in. wg) with Durablade economizer, –26 Pa (–.30 in. wg) with EconoMi$er or –112 Pa (–.45 in. wg) without economizer.

These units are designed for a minimum heati ng operation continuous return-air temperature of 10 C (50 F) (dry bulb), or an intermittent operation down to 7 C (45 F) (dry bulb), such as when used with a night set-back thermostat.

Secure all

Step 3 — Install External Trap for Condensate Drain —

nections are located at 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.

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

The unit’s 19-mm (3/4-in.) condensate drain con-

To use the bottom drai n 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 102-mm (4-in.) deep and protect against freeze-up. If drain line is installed downstream from the external trap, pitch the line away from the unit at 25 mm (1 in.) per 3 m (10 ft) of run. Do not use a pipe size smaller than the 19-mm (

Step 4 — Rig and Place Unit —

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 Tables 1A and 1B and Fig. 5 for additional information. Operating weight is shown in Tables 1A and 1B and Fig. 5.

and 6. Refer to rigging instructions on unit.

POS ITION ING — Maintain cl earan ce around and a bove unit to provide minimum distance from combustible materials, proper airflow, and service access. See Fig. 6.

air inlets near exhaust vents or other sources of contami nated air.

combustion intake or flue outlet.

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

/4-in.) unit connection.

Inspect unit for

Lifting holes are provided in base rails as shown in Fig. 5

All panels must be in place when rigging.

Do not install unit in an indoor location. Do not locate unit

Be sure that unit is installed so that snow will not block the

Unit may be installed directly on wood flooring or on Class

(Copy continued on page 4.)

Fig. 1 — Horizontal Conversion Panels

CONNECTOR

PKG. ACCY.

CRBTMPWR001A00 CRBTMPWR002A00 1

CRBTMPWR003A00

2′-8

[827]

″

1′-10

[583]

CRBTMPWR004A00

D ALT

DRAIN

HOLE

″

[44.5]

GAS POWER CONTROL

/4″

[19] NPT

″

[12.7] NPT

″

[19] NPT

″ [19] NPT

″ [31.7]

/4″ [19] NPT

11/4″ [31.7]

/2″

[12.7]

ROOF CURB

ACCESSORY

“A”

CRRFCURB003A00 1′-2″ [356] CRRFCURB004A00 2′-0″ [610]

″

NOTES:

1. Roof curb accessory is shipped disassembled.

2. Insulated panels: 1-in. [25] thick polyurethane

3. Dimensions in [ ] are in millimeters.

4. Roof curb: 16-gage steel.

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

6. Service clearance 4 ft [1219] on each side.

foam, 1

curb).

/4 lb density.

UNIT SIZE

48TF

008-014

7. Direction of airflow.

8. Connector packages CRBTMPWR001A00 and 2A00 are for thru-the-curb gas type. Packages CRBTMPWR003A00 and 4A00 are for thruthe-bottom type gas connections.

Fig. 2 — Roof Curb Details

Although unit is weatherproof, guard against water from

DRAIN PLUG

MAXIMUM ALLOWABLE

DIFFERENCE mm (in.)

A-B B-C A-C

13 (0.5) 25 (1.0) 25 (1.0)

Fig. 3 — Unit Leveling Tolerances

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

Fig. 4 — Condensate Drain Pan

higher level runoff and overhangs.

Position unit on roof curb so that the following clearances are maintaine d: 7 mm ( base rails on each side and duct end of unit; 84 mm (3

/4-in.) clearance between roof curb and

/16-in.) clearance between roof curb and condenser c oil end of unit. (See Fig. 2, section C-C.)

Locate mechanical draft system flue assembly at least 1219 mm (48 in.) from any opening through which combustion products could enter the building, and at least 1219 mm (48 in.) from an adjacent building or combustible material. When unit is located adjacent to public walkways, flue assembly must be at least 2.13 m (7 ft) above grade.

Flue vent discharge must have a minimum horizontal clearance of 1219 mm (48 in.) from electric and gas meters, gas regulators, and gas relief equipment.

Flue gas can deteriorate building materials. Orient unit so 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), ANSI (American National Standards Institute), latest revision, U.S.A. Standards.

(Copy continued on page 8.)

NOTES:

1. Dimension in ( ) is in millimeters.

2. Hook rigging shackles through holes in base rail as shown in detail ‘‘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.

3. Weights include base unit without economizer. See Tables 1A and 1B for economizer weights.

All panels must be in place when rigging.

UNIT 48TF

D/E/F008 D/E/F012

D/E014

Fig. 5 — Rigging Details

MAX

WEIGHT

lb kg in. mm in. mm in. mm

870 395 87.38 2219 40.25 1022 41.31 1050 1035 469 87.38 2219 40.25 1022 49.31 1253 1050 476 87.38 2219 40.25 1022 49.31 1253

DIMENSIONS

‘‘A’’ ‘‘B’’ ‘‘C’’

Table 1A — Physical Data (SI)

UNIT SIZE 48TF 008 012 014 Low Heat (D), Medium Heat (E), High Heat (F) D E F D E F D E NOMINAL CAPACITY (kW) 21.5 29.2 35.9 OPERATING WEIGHT (kg)

Unit 395 469 476 Durablade Economizer 20 20 20 EconoMi$er 28 28 28 Roof Curb* 65 65 65

COMPRESSOR TYPE Hermetic Hermetic Scroll

Quantity 222 Oil (ml) 1479 ea 1479 ea 1597 ea

REFRIGERANT TYPE R-22

Operating Charge (kg)

Circuit 1 2.10 3.08 3.49 Circuit 2 2.22 3.22 3.49

CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced Fins

Rows...Fins/m 1...669 2...669 2...669 Total Face Area (sq m) 1.90 1.92 2.30

CONDENSER FAN Propeller Type

Nominal L/s 2880 3050 3050 Quantity...Diameter (mm) 2...559 2...559 2...559 Motor BkW...r/s .19...15.5 .19...15.5 .19...15.5

EVAPORATOR COIL Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol™ Feed Device

Rows...Fins/m 3...590 3...590 4...590 Total Face Area (sq m) 0.74 0.93 1.03

EVAPORATOR FAN Centrifugal Type

Quantity...Size (mm x mm) 1...381 x 381 1...381 x 381 1...381 x 381 Type Drive Belt Belt Belt Nominal L/s 1230 1700 1980 Motor kW 1.12 1.50 2.24 Maximum Continuous BkW 1.79 1.79 2.76 Motor Frame Size 56 56 56 Fan r/s Range 8.2-11.7 9.5-13.0 12.0-15.0 Motor Bearing Type Ball Ball Ball Maximum Allowable r/s 26.7 26.7 26.7 Motor Pulley Pitch Diameter Min/Max (mm) 61/86 71/97 102/127 Nominal Motor Shaft Diameter (mm) 16 16 22 Fan Pulley Pitch Diameter (mm) 178 178 203 Nominal Fan Shaft Diameter (mm) 25 25 25 Belt, Quantity...Type...Length (mm) 1...A...1245 1...A...1245 1...A...1346 Pulley Center Line Distance (mm) 425-489 403-445 403-445 Speed Change per Full Turn of

Movable Pulley Flange (r/s)

Movable Pulley Maximum Full Turns

From Closed Position Factory Settin g 555 Factory Speed Setting (r/s) 8.2 9.5 12.0 Fan Shaft Diameter at Pulley (mm) 25 25 25

FURNACE SECTION

Rollout Switch Cutout Temp (C) 90.6 90.6 90.6 Burner Orifice Diameter (mm)

Natural Gas — Std 3.05 3.05 3.05 3.28 3.05 3.28

Liquid Propane — Alt 2.44 2.44 2.44 2.59 2.44 2.59 Thermostat Heat Anticipator Setting (amps) 400 v Stage 1 .14 .14 .14 .14 .14

Stage 2 .14 .20 .20 .20 .20

Gas Input (kW) Stage 1 21.1 31.9 39.8 31.9 39.8 43.9 39.8 43.9

Efficiency (Steady State) (%) 80 80 80 Temperature Rise Range (C) –6-10 2-18 7-24 2-18 7-24 4-21 7-24 4-21 Manifold Pressure (kPa)

Natural Gas — Std 8.3 8.3 8.3 Liquid Propane — Alt 8.3 8.3 8.3

Field Gas Connection Size (mm) 13 19 19 19 19 19 19 19

HIGH-PRESSURE SWITCH (kPa)

Standard Compressor

Internal Relief (Differential) Cutout 2951 Reset (Auto.) 2206

LOW-PRESSURE SWITCH (kPa)

Cutout 48 ± 21 Reset (Auto.) 152 ± 48

FREEZE PROTECTION THERMOSTAT

Opens (C) –1 ± 3 Closes (C) 7 ± 3

OUTDOOR-AIR INLET SCREENS Cleanable

Quantity...Size (mm)

RETURN-AIR FILTERS Throwaway

Quantity...Size (mm) 4...406 x 508 x 51 4...508 x 508 x 51 4...508 x 508 x 51

Bhp — Brake Horsepower BkW — Fan Input Watts x Motor Efficiency

LEGEND *Weight of 356 mm (14-in.) roof curb.

Stage 2 31.4 50.4 59.8 50.4 59.8 65.6 59.8 65.6

.70 .70 .60

555

3103 ± 345 3448 ± 345

1...508 x 635 x 25

1...406 x 635 x 25

NOTE: The 48TF units have a loss-of-charge (low pressure) switch located in the liquid line.

Table 1B — Physical Data (English)

UNIT SIZE 48TF 008 012 014 Low Heat (D), Medium Heat (E), High Heat (F) D E F D E F D E NOMINAL CAPACITY (tons) 6.1 8.3 10.2 OPERATING WEIGHT (lb)

Unit 870 1035 1050 Durablade Economizer 44 44 44 EconoMi$er 62 62 62 Roof Curb* 143 143 143

COMPRESSOR TYPE Hermetic Hermetic Scroll

Quantity 222 Oil (oz) 50 ea 50 ea 54 ea

REFRIGERANT TYPE R-22

Operating Charge (lb-oz)

Circuit 1 4-10 6-13 7-11 Circuit 2 4-11 7- 2 7- 8

CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced Fins

Rows...Fins/in. 1...17 2...17 2...17 Total Face Area (sq ft) 20.50 20.50 25.00

CONDENSER FAN Propeller Type

Nominal Cfm 6100 6500 6500 Quantity...Diameter (in.) 2...22 2...22 2...22 Motor BkW...Rpm

EVAPORATOR COIL Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol™ Feed Device

Rows...Fins/in. 3...15 3...15 4...15 Total Face Area (sq ft) 8.0 10.0 11.1

EVAPORATOR FAN Centrifugal Type

Quantity...Size (in.) 1...15 x 15 1...15 x 15 1...15 x 15 Type Drive Belt Belt Belt Nominal Cfm 2600 3500 4200 Motor Hp 1 Maximum Continuous Bhp 2.40 2.40 3.70 Motor Frame Size 56 56 56 Fan Rpm Range 492-700 571-779 717-900 Motor Bearing Type Ball Ball Ball Maximum Allowable Rpm 1600 1600 1600 Motor Pulley Pitch Diameter Min/Max (in.) 2.4/3.4 2.8/3.8 4.0/5.0 Nominal Motor Shaft Diameter (in.) Fan Pulley Pitch Diameter (in.) 7.0 7.0 8.0 Nominal Fan Shaft Diameter (in.) ——— Belt, Quantity...Type...Length (in.) 1...A...49 1...A...49 1...A...53 Pulley Center Line Distance (in.) 16.75-19.25 15.85-17.50 15.85-17.50 Speed Change per Full Turn of

Movable Pulley Flange (rpm)

Movable Pulley Maximum Full Turns

From Closed Position Factory Settin g 555 Factory Speed Setting (rpm) 492 571 717 Fan Shaft Diameter at Pulley (in.) 111

FURNACE SECTION

Rollout Switch Cutout Temp (F) 195 195 195

Burner Orifice Diameter (in. ...drill size)

Natural Gas — Std .120...31 .120...31 .120...31 .129...30 .120...31 .129...30

Liquid Propane — Alt .096...41 .096...41 .096...41 .102...38 .096...41 .102...38 Thermostat Heat Anticipator Setting (amps) 400 v Stage 1 .14 .14 .14 .14 .14

Stage 2 .14 .20 .20 .20 .20

Gas Input (Btuh) Stage 1 72,000 109,000 136,000 109,000 136,000 150,000 136,000 150,000

‘ 107,000 172,000 204,000 172,000 204,000 224,000 204,000 224,000

Efficiency (Steady State) (%) 80 80 80 Temperature Rise Range (F) 20-50 35-65 45-75 35-65 45-75 40-70 45-75 40-70 Manifold Pressure (in. wg)

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

Field Gas Connection Size (in.)

HIGH-PRESSURE SWITCH (psig)

Standard Compressor

Internal Relief (Differential) Cutout 428 Reset (Auto.) 320

LOW-PRESSURE SWITCH (psig)

Cutout 7 ± 3 Reset (Auto.) 22 ± 7

FREEZE PROTECTION THERMOSTAT

Opens (F) 30 ± 5 Closes (F) 45 ± 5

OUTDOOR-AIR INLET SCREENS Cleanable

Quantity...Size (in.)

RETURN-AIR FILTERS Throwaway

Quantity...Size (in.) 4...16 x 20 x 2 4...20 x 20 x 2 4...20 x 20 x 2

LEGEND *Weight of 356 mm (14-in.) roof curb.

Bhp — Brake Horsepower BkW — Fan Input Watts x Motor Efficiency

/4...930

41 41 36

555

450 ± 50 500 ± 50

1...20 x 25 x 1

1...16 x 25 x 1

NOTE: The 48TF units have a loss-of-charge (low pressure) switch located in the liquid line.

STANDARD

UNIT

UNIT WEIGHT

48TF

D/E/F008 D/E/F012 D/E014

NOTES:

1. Dimensions in [ ] are in millimeters.

Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg ft-in. [mm] ft-in. [mm] ft-in. [mm] ft-in. [mm]

870 395 44 20 62 28 189 86 161 73 239 109 280 127 1-27/8[378] 3-55/16[1050] 2-911/16[856] 2- 27/16[672] 1035 469 44 20 62 28 225 102 192 87 285 129 333 151 2-57/8[759] 4-15/16[1253] 3-03/8[924] 2-107/16[875] 1050 476 44 20 62 28 228 103 195 88 289 131 338 153 1-27/8[378] 4-15/16[1253] 3-03/8[924] 2-107/16[875]

DURABLADE

ECONOMIZER

WEIGHT

ECONOMI$ER

WEIGHT

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 in. [914].

b. Bottom of unit to combustible surfaces (when not using

curb), 1 in. [25]. Bottom of base rail to combustible surfaces (when not using curb) 0 inches.

c. Condenser coil, for proper airflow, 36 in. [914] one side,

12 in. [304] the other. The side getting the greater clearance is optional.

d. Overhead, 60 in. [1624] to assure proper condenser fan

operation.

e. Between units, control box side, 42 in. [1067] per NEC

(National Electrical Code).

f. Between unit and ungrounded surfaces, control box

side, 36 in. [914] per NEC.

g. Between unit and block or concrete walls and other

grounded surfaces, control box side, 42 in. [1067] 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 notes 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′-7″ [483] for 008, 1′-11 [584] for 012 and 014 up from the bottom of the base rail.

CORNER

WEIGHT (A)

″

CORNER

WEIGHT (B)

″″″″

Dia [22] Field Control Wiring Hole

″

[19] - 14 NPT Condensate Drain

″ ″

″″″″

[13] - 14 NPT Gas Connection 48TFD008

″

[19] - 14 NPT Gas Connection 48TFE,F008

″ ″

48TFD,E012 & 014, 48TJF012

″″″″

Dia [51] Power Supply Knockout

CORNER

WEIGHT (C)

WEIGHT (D)

CONNECTION SIZES

Dia [35] Field Power Supply Hole Dia [64] Power Supply Knockout Dia [44] Charging Port Hole

CORNER

“H” “J” “K” “L”

BOTTOM POWER CHART, THESE HOLES REQUIRED FOR USE WITH ACCESSORY

PACKAGES — CRBTMPWR002A00 (POWER

AND CONTROL) AND CRBTMPWR004A00

(POWER, CONTROL, AND GAS)

THREADED

CONDUIT

SIZE

″

[12.7]

″ ″

″

[31.7]

″ ″

″

[19] FPT

″ ″

WIRE

USE

24 V

Powe r 1

Gas 1

REQURED

HOLE SIZES

(MAX.)

″″″″

[22.2]

″″″″

[44.4]

″″″″

[41.3]

Fig. 6 — Base Unit Dimensions

Step 5 — Install Flue Hood —

BASE UNIT

BASE RAIL

FROM GAS METER

ROOF CURB

DRIP LEG PER NFGC*

FIELD-FABRICATED SUPPORT*

1219 mm (48") MINIMUM

228 mm (9") MINIMUM CLEARANCE FOR PANELREMOVAL

MANUAL GAS SHUTOFF VALVE*

GAS REGULATOR*

Fig. 8 — Gas Piping Guide (With Accessory

Thru-the-Curb Service Connections)

SPACING OF SUPPORTS

STEEL PIPE NOMINAL DIAMETER

mm (in.)

DIMENSION

m (ft)

13 (

/2)

19 or 25 (

or 1)

32 or larger (11/4 or larger)

1.8 (6)

2.4 (8)

3.0 (10)

LEGEND

*Field supplied. NOTE: Follow all local codes.

NFGC —

National Fuel Gas Code (U.S.A. Standard)

Fig. 7 — Flue Hood Details

Flue hood is shipped screwed to the burner compartment 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.

For natural gas applications, gas pressure at unit gas connection must not be less than 13.5 kPa (4.0 in. wg) (17.0 kPa [5.0 in. wg] in high heat units) or greater than 44.0 kPa (13.0 in. wg) while unit is operating. For liquid propane applications, the gas pressure must not be less than 17.0 kPa (5.0 in. wg) or greater than 44.0 kPa (13.0 in. wg) at the unit connection.

Size gas supply piping for 1.7 kPa (0.5 in. wg) maximum pressure drop. Do not use supply pipe smaller than unit gas connection.

NOTE: When installing gas piping to gas valve inlet, use properly sized back-up wrench on inlet flange flats.

Support gas piping as shown in the table in Fig. 8. For example, a 19 mm (

/4-in.) gas pipe must have one field-

fabricated support beam every 2.4 m (8 ft).

See Fig. 8 for typical pipe guide and locations of external manual gas shutoff valve.

Step 7 — Make Electrical Connections

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 (National Fire Protection Association), latest edition (U.S.A. Standards), and local electrical codes. Do not use gas piping as an electrical ground. Failure to follow this warning could result in the installer being liable for personal injury of others.

FIELD POWER SUPPLY — All units are factory wired for the voltage shown on the nameplate.

Refer to unit label diagram for additional informat ion. Pigtails are provided for field service.

When installing units, provide a disconnect per local codes. Use copper conductors only when splice connectors are used.

All field wiring must comply with local requirements.

Install conduit through side panel openings indicated in Fig. 6. Route power lines through connector to terminal connections as shown in Fig. 9.

Voltages between phases must be balanced within 2% and the current within 10%. Use the formula shown in Table 2, Note 2 to determine the percentage 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.

NOTE: If field-installed thru-the-bottom connections are used, refer to the accessory installation instructions for power wiring. Refer to Fig. 6 for drilling holes in basepan.

FIELD CONTROL WIRIN G — 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.

NOTE: For wire runs up to 15 m (50 ft), use no. 18 AWG (American Wire Gage) insulated wire (35 C minimum). For 15 to 23 m (51 to 75 ft), use no. 16 AWG insulated wire (35 C minimum). For over 23 m (75 ft), use no. 14 AWG insulated wire (35 C minimum). All wire larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat. Refer to Table 3 for wire conversions.

Table 2 — Electrical Data

UNIT 48TF

008

012

014

LEGEND

FLA — HACR — IFM — LRA — MCA — MOCP — NEC — OFM — RLA —

*Fuse or HACR circuit breaker.

NOTES:

1. In compliance with NEC requirements (U.S.A. Standard) for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker.

Unbalanced 3-Phase Supply Voltage

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

the percent of voltage imbalance. % Voltage Imbalance

= 100 x

NOMINAL VO LTAG E

(50 Hz)

400

(3 phase)

400

(3 phase)

400

(3 phase)

Full Load Amps Heating, Air Conditioning and Refrigeration Indoor (Evaporator) Fan Motor Locked Rotor Amps Minimum Circuit Amps Maximum Overcurrent Protection National Electrical Code (U.S.A.) Outdoor (Condenser) Fan Motor Rated Load Amps

max voltage deviation from average voltage

VOLTAGE

RANGE

Min Max RLA LRA FLA FLA MCA MOCP* FLA LRA

360 440 6.4 42.0 0.3 2.6 17.6 20 18 108

360 440 8.9 52.0 0.3 2.6 23.2 30 24 128

360 440 10.4 73.0 0.7 5.4 29.4 35 31 192

Use the following formula to determine

average voltage

COMPR

(ea)

OFM

(ea)

IFM POWER SUPPLY

Example: Supply voltage is 400-3-50.

AB = 393 v BC = 403 v AC = 396 v

Average Voltage =

= 397

Determine maximum deviation from average voltage.

(AB) 397 – 393 = 4 v (BC) 403 – 397 = 6 v

(AC) 397 – 396 = 1 v Maximum deviation is 6 v. Determine percent of voltage imbalance.

% Voltage Imbalance = 100 x

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local electric utility company immediately.

= 1.5%

6 397

MINIMUM UNIT

DISCONNECT

393 + 403 + 396

1192

Route thermostat cable or equivalent single leads of colored wire from thermostat subbase terminals to low-voltage connections on unit (shown in Fig. 10) as described in Steps 1-4 below.

1. If unit is mounted on roof curb and accessory thru-thecurb service plate connection is used, route wire through connection plate.

2. Pass control wires through the hole provided on unit (see connection D in Connection Sizes table in Fig. 6).

3. 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 (Underwriters’ Laboratories) clearance between highand low-voltage wiring.

4. Connect thermostat wires to screw terminals on lowvoltage connection board.

HEAT ANTICIPATOR SETTINGS — Set heat anticipator settings at .14 amp for the first stage and .20 amp for secondstage heating, except for 008 low heat. Set both first and second stage heat anticipator settings for 008 at .14 amp.

Table 3 — American/European Wire Conversions

AMERICAN EUROPEAN

Industry

Standard Size

18 AWG 16 AWG 14 AWG 12 AWG 10 AWG

8 AWG 6 AWG 4 AWG 3 AWG 2 AWG

1 AWG 1/0 AWG 2/0 AWG 3/0 AWG 4/0 AWG

250 kcmil 300 kcmil 350 kcmil 400 kcmil 500 kcmil 600 kcmil

AWG — kcmil —

American

Conversion

Size (mm

13.29 16.0

21.14 25.0

26.65 —

33.61 35.0

42.39 50.0

53.49 —

67.42 70.0

85.00 95.0

107.19 120.0

126.64 150.0

151.97 —

177.90 185.0

202.63 240.0

253.29 300.0

303.95 —

LEGEND

American Wire Gage Thousand Circular Mils

)

0.82 1.0

1.30 1.5

2.08 2.5

3.30 4.0

5.25 6.0

6.36 10.0

Industry

Standard

Size (mm

)

Fig. 9 — Power Wiring Connections

LEGEND

C— IFC —

NEC —

Contactor Indoor (Evaporator) Fan Contactor National Electrical Code (U.S.A. Standard)

Splice Connection (Factory Supplied)

Equipment Ground

Field Wiring Factory Wiring

LEGEND

AHA — CC —

Adjustable Heat Anticipator Cooling Compensator Field Wiring

Factory Wiring

Fig. 10 — Low-Voltage Connections

UNIT LOW VOLTAGE CONNECTION BOARD

RACEWAY

COMPRESSOR NO. 2

INTEGRATED GAS UNIT CONTROLLER (IGC)

COMPRESSOR NO.1

Fig. 11 — Field Control Wiring Raceway

and Compressor Location

Step 8 — Adjust Factory-Installed Options

Fig. 13 — Damper Panel with Manual

Outdoor-Air Damper Installed

Fig. 14 — Outdoor-Air Hood Details

Fig. 15 — Damper with Hood Attached

APOLLO CONTROL — The optional Apollo control is used to actively monitor all modes of operation as well as indoor (evaporator) fan status, filter status, and indoor-air quality. The Apollo control is designed to work with Carrier TEMP and

VVT

systems.

The thermostat must be wired to the Apollo control before starting the unit. Refer to the Apollo control installation instructions for information on installing the thermostat. See Fig. 12 for Apollo location.

MANUAL OUTDOOR-AIR DAMPER — The outdoor-air hood and screen are attached to the base pan 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 evaporator coil access panel and screws. See Fig. 13.

3. Separate hood and screen from basepan by removi ng the screws and brackets securing them. Save al l screws and discard brackets.

4. Replace evaporator coil access panel using screws from Step 2.

5. Place hood on front of evaporator coil access panel. See Fig. 14 for hood details. Secure top of hood with the screws removed in Step 3. See Fig. 15.

6. Remove and save 6 screws (3 on each side) from sides of the manual outdoor-air damper. Remove and save 2 manual outdoor-air adjustment screws (one on ea ch side of damper bl ade) .

7. Align screw holes on hood with screw holes on side of manual outdoor-air damper. See Fi g. 14 and 15. Secure hood with 6 side screws from Step 6.

8. Adjust minimum position setting of the dampe r blade by adjusting the 2 manual outdoor-air adjustment screws on the front of the damper blade. See Fig. 13. Slide blade vertically until it is in the appropriate position determined by Fig. 16. Tighten screws.

9. Remove and save screws currently on sides of hood. Insert screens. Secure screens to hood using the screws. See Fig. 15.

WIRING TO THERMOSTAT

APOLLO CONTROL

CONTROL WIRING

Fig. 12 — Apollo Control Factory-Installed

in Typical Unit

1.0

Fig. 17 — Access Panel Locations

250

0.8

200

0.6

150

2" (51 mm)

0.4

100

NEGATIVE PRESSURE (Pa)

NEGATIVE PRESSURE (in. wg)

0.2

1" (25 mm) OPEN

200

300

OUTDOOR AIRFLOW (cfm x 100)

100

OUTDOOR AIRFLOW (L/s)

3" (76 mm)

4.4" (112 mm)

10 12

400

500

Fig. 16 — Position Setting

OPTIONAL DURABLADE ECONOMIZER — The optional economizer hood assembly is packaged and shipped in the filter section. Dampe r blades an d contro l boards are instal led at the factory and the ec onomizer is shipped in the vertical di scharge 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 the minimum amount to be supplied by ea ch unit and record quantity of ventilation air needed for use in Step 8.

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. 17. Remove optional economizer and outdoor-air damper hood package from filter section.

3. Assemble outdoor-air hood t op and side plates as shown in Fig. 18. Install seal strips on hood top and sides. Put aside screen retainer and retainer screw for later assembly . Do not attach hood to unit at this time.

4. On 012 and 014 units, install vertical discha rge block-off plate on right side over return air duct opening. See Fig. 19.

5. a. Slide economizer into unit and secure with screws.

See Fig. 20.

NOTE: Be sure to engage rear economizer flange under tabs at rear of vertical return-air opening.

b. Remove screw and discard from barometric relief

damper. See Fig. 20.

6. To convert to horizontal discharge application: a. Rotate the economizer 90 degrees until the econo-

mizer motor faces the condenser section (see Fig. 21).

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. 22.

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

8. If ventilation air is not required, proceed to Step 9. If ventilation air is required, determine the minimum position setting for required airflow. See Fi g. 23. Adjust minimum position setting by loosening the screws on the position setting bracket. See Fig. 24. Slide bracket until the top screw is in the position determined by Fig. 23. Tighten screws.

9. Remove tape from outdoor-air thermostat (OAT). Fasten OAT to inside of hood using screws and spee d clips provided. See Fig. 25. Make sure OAT terminals are positioned up.

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

11. Fasten hood top and side plate assembly to outdoor-air opening panel with screws provided.

12. Place knob supplied with economizer on OAT. See Fig. 25. Set OAT for 1.7° C (3° F) below indoor room thermostat setting. If accessory enthal py control (EC) is used in place of OAT, see instructions shipped with EC for installation and adjustment. See Fig. 25.

13. Connect OAT per Fig. 26.

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

NOTE: Refer to Fig. 27 for Durablade economizer barome tric relief damper characteristics.

OUTDOOR-AIR OPENING PANEL

FILTER ACCESS PANEL

ECONOMIZER

ECONOMIZER CONTROL BOARD

ECONOMIZER MOTOR

POSITION SETTING BRACKET

BLOCK-OFF PLATE

CONTROL BOARD

SHIPPING SCREW

ECONOMIZER PLUG

ECONOMIZER MOTOR

TOP SCREW

Fig. 20 — Durablade Economizer Installed in Unit

Fig. 18 — Outdoor-Air Hood Details

Fig. 21 — Horizontal Durablade Economizer

Installation (90 Degree Rotation)

Fig. 19 — Vertical Discharge Block-Off Plate

(48TF012, 014 Units Only)

Fig. 22 — Horizontal Discharge Block-Off Plate

Example:

Given —

Negative Pressure . . . . . . . . . . . . . . . . . . . . . . . . . 25 Pa (0.1 in. wg)

Outdoor Airflow . . .. . . . . . . . . . . . . . . . . . . . . . . . 520 L/s (1100 cfm)

Determine —

Setting = 150 mm (6 in.)

Fig. 23 — Durablade Economizer Damper Minimum

Position Setting

TOP

OUTSIDE AIR SCREEN

OAT (TERMINALS ARE UP)

UNIT

Fig. 24 — Durablade Economizer Minimum

Position Damper Setting

ENTHALPY CONTROL

HOOD

OPEN

OUTDOOR TEMP

8 0

POSITION

MINIMUM

CONT

OR UNPOWERED ST

ACT RA

CTS SHO

4 V

–SETPOINTS

TINGS: 1.5A

DAMPER

WN IN HIGH ENTHALPY

OPEN

3 m

RUN, 3.5A IN

–CCW

. A

DAMPER

CLOSED

T 1

1 VDC

7-36

ENTHALPY CONTROL

V A C

TR1

Fig. 25 — Outdoor-Air Thermostat/

Enthalpy Control Installation

Fig. 26 — Wiring Connections for

CONTROLLER

BAROMETRIC RELIEF DAMPERS

OUTDOOR AIR TEMPERATURE SENSOR

GEAR-DRIVEN DAMPER

ACTUATOR

ECONOMI$ER PLUG

Fig. 28 — EconoMi$er Component Locations

OUTDOOR-AIR OPENING PANEL

FILTER ACCESS PANEL

Fig. 29 — Typical Access Panel Locations

OUTDOOR AIR OPENING PANEL

SEAL STRIP

EXHAUST AIR SCREEN

EXHAUST AIR HOOD TOP

SCREEN RETAINER

EXHAUST AIR HOOD SIDES

EXHAUST AIR BOTTOM BRACKET

Fig. 30 — Exhaust Air Hood Assembly

Outdoor-Air Thermostat

175

150

125

100

PRESSURE DROP (Pa)

0.70

0.60

0.50

0.40

0.30

PRESSURE DROP (in. wg)

0.20

0.10

0.00

200 400 600 800 1000 1200

100 200 300

CFM

L/s

Fig. 27 — Durablade Economizer Barometric Relief

Damper Characteristics

400 500

570

OPTIONAL ECONOMI$ER — See Fig. 28 for EconoMi$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. 29.

NOTE: If installing an optional Power Exhaust Assembly, refer to the EconoMi$er Power Exhaust Installation Instructions, then proceed to Step 6. Controller should be mounted in vertical position as shown in Fig. 28.

2. To assemble the hood assembly remove the EconoMi$er hood from its packaging. Locate the outdoor air opening panel. See Fig. 30.

3. Install the 19 mm x 19 mm ( exhaust air hood top panel. Install the 3 mm x 22 mm (1/8 x 7/8-in.) seal strip on the exhaust air hood side panels and bottom brackets. Assemble the exhaust air hood to the outdoor air opening panel as shown in Fig. 30, using the screws provided. Do not attach hood assembly to unit

at this time.

4. Install the 3 mm x 22 mm ( outdoor air hood top and side panels. Assemble the outdoor air hood to the outdoor air opening panel as shown in Fig. 31, using the screws provided. Do not attach com-

pleted hood (Fig. 32) assembly to the unit at this time.

/4 x 3/4-in.) seal strip on the

/8 x 7/8-in. seal strip on the

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