Carrier WeatherExpert 48N3, WeatherExpert 48N5, WeatherExpert 48N6, WeatherExpert 48N4, WeatherExpert 48N7 Installation Instructions Manual

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WeatherExpert

48N2,N3,N4,N5,N6,N7,N8,N9

Packaged Rooftop Cooling Units with Gas Heat and

ComfortLink Controls

Installation Instructions

CONTENTS

Page

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . .1,2

ACOUSTICAL CONSIDERATIONS . . . . . . . . . . . . . . .2,3

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Acoustic Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-37

Step 1 — Perform Jobsite Survey . . . . . . . . . . . . . . . . 3

Step 2 — Place Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Step 3 — Roof Mount Unit. . . . . . . . . . . . . . . . . . . . . . . . 3

Step 4 — Slab Mount Unit . . . . . . . . . . . . . . . . . . . . . . . . 3

Step 5 — Install Curb Gasketing . . . . . . . . . . . . . . . . 15

Step 6 — Install Field-Fabricated Ductwork . . . . . 15

Step 7 — Rig Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Step 8 — Connect Condensate Drain. . . . . . . . . . . . 15

Step 9 — Install Outdoor Hoods. . . . . . . . . . . . . . . . . 24

Step 10 — Route Field Wiring . . . . . . . . . . . . . . . . . . . 25

Step 11 — Make Field Electrical Connections . . . 26

Step 12 — Connect Air Pressure Tubing . . . . . . . . 28

• VARIABLE FREQUENCY DRIVE

• POWER EXHAUST

•RETURN FAN

Step 13 — Remove Supply-Fan Shipping

Bracket Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Step 14 — Remove Power Exhaust Shipping

Bracket Screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Step 15 — Remove Optional Return-Fan

Shipping Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Step 16 — Connect Gas Piping. . . . . . . . . . . . . . . . . . 30

Step 17 — Configure Optional Modulating Gas

Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Step 18 — Install Flue/Inlet Hoods . . . . . . . . . . . . . . 31

Step 19 — Install Supply-Air Thermistors . . . . . . . 32

Step 20 — Install Unit Accessories. . . . . . . . . . . . . . 32

Two-Piece Unit Fit Up . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

CONTROLS INSTALLATION. . . . . . . . . . . . . . . . . . 37-49

Constant Volume (CV)/Staged Air Volume

(SAV) Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

• CONTROL WIRING

Variable Air Volume (VAV) Units . . . . . . . . . . . . . . . . 38

Option and Accessory Control Wiring. . . . . . . . . . . 38

Carrier Comfort Network

Optional UPC Open Installation . . . . . . . . . . . . . . . . . 44

Smoke Control Modes . . . . . . . . . . . . . . . . . . . . . . . . . . 46

(CCN) Interface . . . . . . 44

GENERAL

This installation instruction contains basic unit installation information, including installation of thermostats and remote temperature sensors.

For additional information and service instructions, refer to the Controls, Start-Up, Operation, Service and Troubleshooting literature.

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 literature, tags and labels attached to the unit, and other safety precautions that may apply.

Follow all safety codes, including ANSI (American National Standards Institute) Z223.1. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have fire extinguisher available for all brazing operations.

WARNING

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

FOR YOUR SAFETY

WHAT TO DO IF YOU SMELL GAS

Do not try to light any appliance. Do not touch any electrical switch; do not use any phone in your building. Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. If you cannot reach your gas supplier, call the fire department.

FOR YOUR SAFETY

Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

WARNING

Improper installation, adjustment, alteration, service, or maintenance can cause injury or property damage. Refer to this manual. For assistance or additional information, consult a qualified installer, service agency, or the gas supplier.

CAUTION

Disconnect gas piping from units when leak testing at pressures greater than 0.5 psig. Pressures greater than 0.5 psig will cause gas valve damage resulting in a hazardous condition. If gas valve is subjected to pressure greater than

0.5 psig, it must be replaced. When pressure testing fieldsupplied gas piping at pressures of 0.5 psig or less, the unit connected to such piping must be isolated by manually closing the gas valve.

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

Catalog No. 04-53480121-01 Printed in U.S.A. Form 48N-8SI Pg 1 10-16 Replaces: 48N-7SI

WARNING

DO NOT USE TORCH to remove any component. System contains oil and refrigerant under pressure.

To remove a component, wear protective gloves and goggles and proceed as follows:

a. Shut off electrical power to unit. b. Recover refrigerant to relieve all pressure from sys-

tem using both high-pressure and low pressure ports.

c. Traces of vapor should be displaced with nitrogen

and the work area should be well ventilated. Refrigerant in contact with an open flame produces toxic gases.

d. Cut component connection tubing with tubing cutter

and remove component from unit. Use a pan to catch any oil that may come out of the lines and as a gage for how much oil to add to the system.

e. Carefully unsweat remaining tubing stubs when nec-

essary. Oil can ignite when exposed to torch flame.

Failure to follow these procedures may result in personal injury or death.

CAUTION

DO NOT re-use compressor oil or any oil that has been exposed to the atmosphere. Dispose of oil per local codes and regulations. DO NOT leave refrigerant system open to air any longer than the actual time required to service the equipment. Seal circuits being serviced and charge with dry nitrogen to prevent oil contamination when timely repairs cannot be completed. Failure to follow these procedures may result in damage to equipment.

ACOUSTICAL CONSIDERATIONS

In order to minimize sound transmitted to the space, please

conform to the following recommendations (see Fig. 1):

Location

• Avoid locating the unit above sound-sensitive areas. Instead, locate the unit above restrooms, storage areas, corridors, or other noise-tolerant areas.

• Avoid mounting the unit in the middle of large roof expanses between vertical supports. This will minimize the phenomenon known as roof bounce.

• Install the units close to vertical roof supports (columns or load bearing walls).

• Locate the units at least 25 feet away from critical areas. If this is not possible, the ductwork and ceiling structure should be acoustically treated.

• Consider the use of vibration isolators or an acoustic curb.

Ductwork

• Utilize flexible connectors between the unit and the supply and return ducts.

• Supply and return air main trunk ducts should be located over hallways and/or public areas.

• Provide trailing edge turning vanes in ductwork elbows and tees to reduce air turbulence.

• Make the ductwork as stiff as possible.

• Use round duct wherever possible because it is less noisy.

• Seal all penetrations around ductwork entering the space.

• Make sure that ceiling and wall contractors do not attach hangers or supports to ductwork.

• Provide as smooth and gradual transition as possible when connecting the rooftop unit discharge to the supply duct.

• If a ceiling plenum return is utilized, provide a return elbow or tee to eliminate line-of-sight noise to the space. Face the entrance of the return duct away from other adjacent units.

Acoustic Insulation

• Provide acoustic interior lining for first 20 feet of supply and return duct or until the first elbow is encountered. The elbow prevents line-of-sight transmission in the supply and return ducts.

• Install a double layer of 2-in. low density quilted fiberglass acoustical pad with a facing on top of the roof deck before building insulation and roofing installation occur. Place the material inside the curb and for 4 to 8 ft beyond the unit perimeter, dependent upon unit size (larger units require a wider apron outside the curb). Openings in the pad should only be large enough for the supply and return ducts. An alternate approach is to use two layers of gypsum board with staggered seams in addition to the acoustical pad.

/8-in. barium-loaded vinyl

Flexible

Fig. 1 — Acoustical Considerations

Connectors Supply and Return

Vibration Isolators in Roof Curb

Intake Plenum

Supply Fan

Supply and Return Ducts Lined with Acoustical Duct Liner

Discharge Plenum

Compressor/ Condensing Section

Round Duct Controls Rumble Best

All Roof Penetrations Should Be Sealed Air Tight

INSTALLATION

Step 1 — Perform Jobsite Survey —

the following checks before installation.

1. Consult local building codes and the NEC (National Electrical Code) (ANSI/NFPA [American National Standards Institute/National Fire Protection Association] 70) for special installation requirements.

2. Determine unit location (from project plans) or select unit location. Refer to Acoustical Considerations section.

3. Check for possible overhead obstructions which may interfere with unit lifting or rigging.

Complete

CAUTION

Do not lift unit with forklift truck. Move unit with overhead rigging only.

Step 2 — Place Unit — Inspect unit for transportation

damage. If any damage is found, file a claim with the transportation agency.

Provide clearance around and above unit for airflow, safety, and service access. Do not restrict top (area above condenser fans) in any way. Allow at least 6 ft on all sides for rated performance, code compliance, and service. On units equipped with power exhaust option, high velocity air is exhausted out the hood. Unit should be positioned with at least 10 ft clearance between the exhaust hood and any obstruction. See Fig. 2 for multiple unit minimum separation. See Tables 1-6 for additional unit and fan data.

Check unit dimensional drawings on pages 19-23 for unit arrangement and minimum performance and service clearances.

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

Although unit is weatherproof, guard against water from

higher level runoff and overhangs.

Level by using unit frame as a reference.

Step 3 — Roof Mount Unit — Check building codes

for weight distribution requirements. Refer to Acoustical Considerations section. Unit and accessory weights are shown in Tables 1 and 2. Unit may be mounted on class A, B, or C roofing material.

ROOF CURB — Assemble and install roof curb as described in instructions shipped with the accessory. Accessory roof curb and information required to field fabricate a roof curb is shown in Fig. 3 and 4. Install insulation, cant strips, roofing, and counter flashing as required. For unit condensate drain to function properly, curb must be level or within tolerances shown in Fig. 3.

NOTE: Units with double-wall floor design (“Double Wall onthe-bottom”) are not compatible with roof curbs.

STEEL BEAMS — If roof curb is not used, support unit with steel beams along its entire length and then support steel as required. Cross members are required to support across its width at each lifting lug location; use more cross members for support as needed.

Step 4 — Slab Mount Unit — Provide a level con-

crete slab that extends beyond unit cabinet at least 6 inches. Use gravel apron in front of condenser coil air inlet to prevent grass and foliage from obstructing airflow. Provide a slab minimum 8 in. thick with sufficient height above grade to allow for condensate trap as described in Step 8.

a48-8682

MINIMUM SPACING (ft)

UNIT A B C D E F

Series

12 8 12 10 10 10

Series

10 8 8 10 10 10

Fig. 2 — Multiple Unit Minimum Separation

Table 1 — Physical Data 48N Sizes N-T (75-150 Tons Nominal Capacity)

BASE UNIT N P Q R S T NOMINAL CAPACITY (tons) 75 90 105 120 130 150 WEIGHT (lb)

Base Unit* 12,000 12,455 12,455 16,170 16,860 17,040 Split Unit - Main Section 9,110 9,565 9,565 12,880 13,570 13,750 Split Unit - Return Section 2,890 2,890 2,890 3,290 3,290 3,290 COMPRESSORS Scroll

Quantity 566 8 8 8

Oil Charge (oz) per Compressor 110 110 110 110 110 110 Compressor A1 ZP182 ZP154 ZP182 ZP182 ZP154 ZP182 Compressor A2 ZP182 ZP154 ZP182 ZP154 ZP182 ZP182 Compressor A3 0 ZP154 ZP182 ZP154 ZP182 ZP182 Compressor A4 0 0 0 ZP154 ZP182 ZP182 Compressor B1 ZP137 ZP182 ZP182 ZP182 ZP154 ZP182 Compressor B2 ZP137 ZP182 ZP182 ZP154 ZP182 ZP182 Compressor B3 ZP137 ZP182 ZP182 ZP154 ZP182 ZP182 Compressor B4 0 0 0 ZP154 ZP182 ZP182 Stages of Capacity, % Total Capacity 0,18,23,41,65,

Number of Refrigerant Circuits 222 2 2 2 REFRIGERANT Type R-410A Charge Amount See Table 6 METERING DEVICE Type... Quantity per Circuit Electronically controlled expansion devices... two (2) per circuit STANDARD EFFICIENCY UNIT CONDENSER MCHX

Material Aluminum Aluminum Aluminum Aluminum Aluminum Aluminum Number of Total Coils 444 4 6 6

Total Face Area (sq ft) 138.7 173.3 173.3 173.3 173.3 260.0 HIGH EFFICIENCY UNIT CONDENSER MCHX

Material Aluminum Aluminum Aluminum Aluminum Aluminum Number of Total Coils 466 6 6

Total Face Area (sq ft) 138.7 173.3 260.0 260.0 260.0 EVAP-STANDARD CAPACITY with STD EFFICIENCY RTPF

Material CU-AL CU-AL CU-AL CU-AL CU-AL CU-AL

Quantity 222 2 2 2

Tube Type Cross Hatched Cross Hatched Cross Hatched Cross Hatched Cross Hatched Cross Hatched

Rows (each) 446 4 6 6

FPI 16 16 16 16 16 16

Total Face Area (sq ft) 78.8 78.8 78.8 99.6 99.6 99.6 EVAP-STANDARD CAPACITY with HIGH

EFFICIENCY

Material CU-AL CU-AL CU-AL CU-AL CU-AL

Quantity 222 2 2

Tube Type Cross Hatched Cross Hatched Cross Hatched Cross Hatched Cross Hatched

Rows (each) 446 4 6

FPI 16 16 16 16 16

Total Face Area (sq ft) 78.8 78.8 78.8 99.6 99.6 EVAP-HIGH CAPACITY with STD EFFICIENCY RTPF

Material CU-AL CU-AL CU-AL CU-AL CU-AL CU-AL

Quantity 222 2 2 2

Tube Type Cross Hatched Cross Hatched Cross Hatched Cross Hatched Cross Hatched Cross Hatched

Rows (each) 668 6 8 8

FPI 16 16 16 16 16 16

Total Face Area (sq ft) 78.8 78.8 78.8 99.6 99.6 99.6 EVAP-HIGH CAPACITY with HIGH EFFICIENCY RTPF

Material CU-AL CU-AL CU-AL CU-AL CU-AL

Quantity 222 2 2

Tube Type Cross Hatched Cross Hatched Cross Hatched Cross Hatched Cross Hatched

Rows (each) 668 6 8

FPI 16 16 16 16 16

Total Face Area (sq ft) 78.8 78.8 78.8 99.6 99.6 CONDENSER FAN, STANDARD EFFICIENCY Number of Fans 466 6 9 9 Type Prop/Metal Prop/Metal Prop/Plastic Prop/Plastic Prop/Metal Prop/Plastic Diameter (in.) 30.5 30 30.5 30.5 30 30.5 Motor Hp 1111 1 1 Nominal Cfm 41,000 81,000 81,000 81,000 93,000 122,400 Motor Rpm 1140 1140 1140 1140 1140 1140 CONDENSER FAN, HIGH EFFICIENCY Number of Fans 699 9 9 Type Prop/Metal Prop/Plastic Prop/Plastic Prop/Plastic Prop/Plastic Diameter (in.) 30.5 30.5 30.5 30.5 30.5 Motor Hp 1111 1 Nominal Cfm 61,000 93,000 93,000 93,000 93,000 Motor Rpm 1140 1140 1140 1140 1140

LEGEND * Base unit includes: economizer dampers and hoods, filter tracks less filters, evaporator coil

Cu-Al — Copper-to-Aluminum DWDI — Double Width Double Inlet FPI — Fins per Inch MBtuh — Btuh in Thousands MCHX — Microchannel Heat Exchanger RTPF — Round Tube Plate Fin SWSI — Single Width Single Inlet

82,100

0,11,15,33,49,

67,82,100

mounting less the evaporator, extended plenum, and standard efficiency condenser. For 75105 nominal ton units only, base unit weight also includes the short supply fan section.

0,13,17,33,50,

67,83,100

RTPF

0,11,14,28,40,

52,64,76,88,100

0,8,11,22,35,

48,61,74,87,100

0,9,13,25,38,

50,63,75,88,90

Table 1 — Physical Data 48N Sizes N-T (75-150 Tons Nominal Capacity) (cont)

BASE UNIT N P Q R S T NOMINAL CAPACITY (tons) 75 90 105 120 130 150 HUMIDI-MIZER Type MCHX Material Aluminum Quantity 1 Surface E-Coated Total Face Area (sq ft) 34.5 43 43 43 43 STANDARD AND HIGH CAPACITY HOT WATER COILS Type RTPF Material Aluminum Fin, Copper Tube Quantity 2 Tube Type Smooth Rows (each) 2 FPI 12 Total Face Area (sq ft) 22.4 26.4 STANDARD AND HIGH CAPACITY STEAM COIL Type RTPF Material Aluminum Fin, Copper Tube, Steel Header, Sloped Casing Quantity 2 Tube Type Smooth Connection Size, Length (in.) 2.50, 3.00 Total Face Area (sq ft) 40.1 49.0 HEATING SECTION LOW (48N ONLY) Heating Section 22233 3

Number of Heat Exchangers 18 18 18 27 27 27 Output (MBtuh) 648 648 648 972 972 972 Temperature Rise Range (F) 10-40 10-40 10-40 15-45 15-45 15-45 Efficiency (%) 81 81 81 81 81 81 Burner Orifice Quantity, Diameter (in.), Drill No. 18, 0.1285, 30 18, 0.1285, 30 18, 0.1285, 30 27, 0.1285, 30 27, 0.1285, 30 27, 0.1285, 30 Manifold Pressure (in. wg) 3.1 3.1 3.1 3.1 3.1 3.1 Line Pressure (in. wg) (min...max) 5.8-11 5.8-11 5.8-11 6.2-11 6.2-11 6.2-11 Firing Stages (Standard) 2222 2 2 Firing Stages (Modulating) 14-100% 14-100% 14-100% 9-100% 9-100% 9-100%

Number of Gas Valves 2223 3 3 HEATING SECTION MED (48N ONLY) Heating Section

Number of Heat Exchangers 27 27 36 36 36

Input/Output (MBtuh) 972 972 1296 1296 1296

Temperature Rise Range (F) 20-50 20-50 20-50 20-50 20-50

Efficiency (%) 81 81 81 81 81

Burner Orifice Quantity, Diameter (in.), Drill No. 27, 0.1285, 30 27, 0.1285, 30 36, 0.1285, 30 36, 0.1285, 30 36, 0.1285, 30

Manifold Pressure (in. wg) 3.1 3.1 3.1 3.1 3.1

Line Pressure (in. wg) (min...max) 6.3-11 6.3-11 6.2-11 6.2-11 6.2-11

Firing Stages (Standard) 222 2 2

Firing Stages (Modulating) 9-100% 9-100% 7-100% 7-100% 7-100%

Number of Gas Valves 334 4 4 HEATING SECTION HIGH (48N ONLY) Heating Section 34455 5

Number of Heat Exchangers 27 36 36 45 45 45

Input/Output (MBtuh) 972 1296 1296 1620 1620 1620

Temperature Rise Range (F) 20-50 25-65 25-65 25-55 25-55 25-55

Efficiency (%) 81 81 81 81 81 81

Burner Orifice Quantity, Diameter (in.), Drill No. 27, 0.1285, 30 36, 0.1285, 30 36, 0.1285, 30 45, 0.1285, 30 45, 0.1285, 30 45, 0.1285, 30

Manifold Pressure (in. wg) 3.1 3.1 3.1 3.1 3.1 3.1

Line Pressure (in. wg) (min...max) 6.3-11 6.3-11 6.3-11 6.2-11 6.2-11 6.2-11

Firing Stages (Standard) 2222 2 2

Firing Stages (Modulating) 9-100% 7-100% 7-100% 5-100% 5-100% 5-100%

Number of Gas Valves 3445 5 5 SUPPLY FAN Standard Supply Fan Diameter (in.) 28 Wheel and Blade Type DWDI Airfoil Maximum Allowable Cfm 42,000 Maximum Allowable Speed (rpm) 1,800 Shaft Diameter at Pulley (in.) 2.25 High Static Supply Fan Diameter (in.) 40 Wheel and Blade Type DWDI Airfoil Maximum Allowable Cfm 52,500 Maximum Allowable Speed (rpm) 1,250 Shaft Diameter at Pulley (in.) 3

LEGEND * Base unit includes: economizer dampers and hoods, filter tracks less filters, evaporator coil

COIL

334 4 4

DWDI Airfoil

60,000

1,550

2.5

DWDI Airfoil

60,000

1,250

mounting less the evaporator, extended plenum, and standard efficiency condenser. For 75105 nominal ton units only, base unit weight also includes the short supply fan section.

Table 1 — Physical Data 48N Sizes N-T (75-150 Tons Nominal Capacity) (cont)

BASE UNIT N P Q R S T NOMINAL CAPACITY (tons) 75 90 105 120 130 150 OPTIONAL POWER EXHAUST Power Exhaust Diameter (in.) 20 Wheel and Blade Type DWDI Forward Curve Maximum Allowable Cfm 42,000 Maximum Allowable Speed (rpm) 1,200 1,200 Shaft Diameter at Pulley (in.) 1.75 1.75 High Static Power Exhaust Diameter (in.) 36 Wheel and Blade Type DWDI Forward Curve DWDI Forward Curve Maximum Allowable Cfm 42,000 Maximum Allowable Speed (rpm) 650 Shaft Diameter at Pulley (in.) 2.5 OPTIONAL RETURN FAN Return Fan Diameter (in.) 40 40 Wheel and Blade Type SWSI Plenum Airfoil SWSI Plenum Airfoil Maximum Allowable Cfm 52,500 Maximum Allowable Speed (rpm) 1236 1236 Shaft Diameter at Pulley (in.) 2.5 2.5 High Static Return Fan Diameter (in.) 45 Wheel and Blade Type SWSI Plenum Airfoil Maximum Allowable Cfm 60,000 Maximum Allowable Speed (rpm) 850

50 56

60,000 60,000

780 720

Shaft Diameter at Pulley (in.) 3 MIXED AIR FILTERS MERV 7 Pleated Filters 2 inch, MERV 7 2 inch, MERV 7 Quantity 28 28 Size (in.) 20x24x2 20x25x2 MERV 8 Pleated Filters 4 inch, MERV 8 4 inch, MERV 8 Quantity 28 28 Size (in.) 20x24x4 20x25x4 MERV 14 Pleated Filters 4 inch, MERV 14 4 inch, MERV 14 Quantity 28 28 Size (in.) 20x24x4 20x25x4 MERV 14 Cartridge Filters, 2 or 4-in. in Pre-Filters 12 inch, MERV 14 Cartridge Filters 12 inch, MERV 14 Cartridge Filters Quantity 20 20 Size (in.) (15) 20x24x12, (5) 24x24x12 24x24x12 MERV 14 Bag, 2 or 4-in. in Pre-Filters 12 inch, MERV 14 Bag Filters 12 inch, MERV 14 Bag Filters Quantity 20 20 Size (in.) (15) 20x24x12, (5) 24x24x12 24x24x12 MERV 15 Bag, 2 or 4-in. in Pre-Filters 19 inch, MERV 15 Bag Filters 19 inch, MERV 15 Bag Filters Quantity 20 20 Size (in.) (15) 20x24x19, (5) 24x24x19 24x24x19 FINAL FILTERS MERV 14 Cartridge Filters, 2 or 4-in. in Pre-Filters 12 inch, MERV 14 Cartridge Filters 12 inch, MERV 14 Cartridge Filters Quantity

19 19

Size (in.) (14) 20x24x12, (5) 24x24x12 24x24x12 MERV 15 Bag, 2 or 4-in. in Pre-Filters 19 inch, MERV 15 Bag Filters 19 inch, MERV 15 Bag Filters Quantity 19 19 Size (in.) (14) 20x24x19, (5) 24x24x19 24x24x19 MERV 17 HEPA, 2 or 4-in. in Pre-Filters 12 inch, MERV 17 HEPA Filters, 99.99% 12 inch, MERV 17 HEPA Filters, 99.99% Quantity 19 19 Size (in.) (14) 24x12x12, (5) 24x24x12 24x24x12 OUTSIDE AIR SCREENS Standard Hood (Motorized OA and Economizer

Options)

Aluminum Frame, Permanent

Quantity 12 Screens 16 Screens Size (in.) 16 7/8 x 31 16 7/8 x 31

LEGEND * Base unit includes: economizer dampers and hoods, filter tracks less filters, evaporator coil

mounting less the evaporator, extended plenum, and standard efficiency condenser. For 75105 nominal ton units only, base unit weight also includes the short supply fan section.

60,000

600

60,000

Table 2 — Operating Weights of Options and Accessories (lb)

OPTION OR ACCESSORY

(75)

(90)

(105)

(120)

(130)

Economizer 140 140 140 140 140 140

48N UNIT SIZE (TON NOMINAL CAPACITY)

Filters

2 in. MERV 7 90 90 90 100 100 100 4 in. MERV 8 150 150 150 175 175 175 4 in. MERV 14 175 175 175 210 210 210 12 in. MERV 14 Bag with 2 in. Pre-Filter 200 200 200 225 225 225 12 in. MERV 14 Bag with 4 in. Pre-Filter 260 260 260 300 300 300 19 in. MERV 15 Bag with 2 in. Pre-Filter 300 300 300 335 335 335 19 in. MERV 15 Bag with 4 in. Pre-Filter 320 320 320 350 350 350 12 in. MERV 14 Cartridge with 2 in. Pre-Filter 350 350 350 375 375 375

12 in. MERV 14 Cartridge with 4 in. Pre-Filter 370 370 370 400 400 400 Field Use Filter Section 635 635 635 665 665 665 Evaporator Standard Capacity 625 625 832 795 1053 1053 High Capacity 832 832 1110 1053 1402 1402 High-Efficiency Condenser 310 691 691 691 None NA Extended Chassis 320 320 320 335 335 335

Humidi-MiZer Gas Heat

Low 937 937 937 1099 1099 1099 Medium NA 1067 1067 1229 1229 1229 High 1067 1197 1197 1469 1469 1469 Modulating 50 50 50 50 50 50

Blank Section

4 ft 530 530 530 555 555 555

Dehumidification System 475 495 495 510 510 510

8 ft 1060 1060 1060 1110 1110 1110 Post Filters

19 in. MERV 15 Bag with 2 in. Pre-Filter 830 830 830 890 890 890 19 in. MERV 15 Bag with 4 in. Pre-Filter 850 850 850 905 905 905 12 in. MERV 14 Cart with 2 in. Pre-Filter 880 880 880 930 930 930 12 in. MERV 14 Cart with 4 in. Pre-Filter 900 900 900 955 955 955 12 in. MERV 17 HEPA with 2 in. Pre-Filter 905 905 905 965 965 965 12 in. MERV 17 HEPA with 4 in. Pre-Filter 930 930 930 980 980 980

Supply Fan

High-Static Supply Fan 1274 1274 1274 1169 1169 1169

Standard Supply Fan 965 965 965 1071 1071 1071 PE (Power Exhaust) Fan

High-Static PE Fan 927 927 927 927 927 927

Standard PE Fan 619 727 727 727 727 727 Return Fan

High-Static Return Fan 974 1086 1298 1298 1298 1298

Standard Return Fan 895 895 895 895 895 895 Supply/PE/Return Motor Includes VFD

460 Volt ODP

7.5 Hp 183 183 183 183 183 183 10 Hp 209 209 209 209 209 209 15 Hp 320 320 320 320 320 320 20 Hp 374 374 374 374 374 374 25 Hp 417 417 417 417 417 417 30 Hp 456 456 456 456 456 456 40 Hp 697 697 697 697 697 697 50 Hp 784 784 784 784 784 784 60 Hp 897 897 897 897 897 897 75 Hp 1275 1275 1275 1275 1275 1275 100 Hp 1488 1488 1488 1488 1488 1488

LEGEND

ODP — Open Drip Proof TEFC — Totally Enclosed, Fan Cooled VFD — Variable Frequency Drive

NOTE: Please refer to E-CAT for selection.

(150)

Table 2 — Operating Weights of Options and Accessories (lb) (cont)

OPTION OR ACCESSORY

Supply/PE/Return Motor Includes VFD 460 Volt TEFC

7.5 Hp 267 267 267 267 267 267 10 Hp 283 283 283 283 283 283 15 Hp 368 368 368 368 368 368 20 Hp 437 437 437 437 437 437 25 Hp 576 576 576 576 576 576 30 Hp 604 604 604 604 604 604 40 Hp 991 991 991 991 991 991 50 Hp 925 925 925 925 925 925 60 Hp 1163 1163 1163 1163 1163 1163 75 Hp 1275 1275 1275 1275 1275 1275 100 Hp 1488 1488 1488 1488 1488 1488

Supply/PE/Return Motor Includes VFD 575 Volt ODP

7.5 Hp 186 186 186 186 186 186 10 Hp 204 204 204 204 204 204 15 Hp 327 327 327 327 327 327 20 Hp 369 369 369 369 369 369 25 Hp 433 433 433 433 433 433 30 Hp 456 456 456 456 456 456 40 Hp 697 697 697 697 697 697 50 Hp 784 784 784 784 784 784 60 Hp 897 897 897 897 897 897 75 Hp 1194 1194 1194 1194 1194 1194 100 Hp 1488 1488 1488 1488 1488 1488

Supply/PE/Return Motor Includes VFD 575 Volt TEFC

7.5 Hp 228 228 228 228 228 228 10 Hp 277 277 277 277 277 277 15 Hp 382 382 382 382 382 382 20 Hp 436 436 436 436 436 436 25 Hp 616 616 616 616 616 616 30 Hp 652 652 652 652 652 652 40 Hp 795 795 795 795 795 795 50 Hp 897 897 897 897 897 897 60 Hp 933 933 933 933 933 933 75 Hp 1194 1194 1194 1194 1194 1194 100 Hp 1488 1488 1488 1488 1488 1488

Supply/PE/Return Motor Includes VFD Bypass

7.5 Hp 10 10 10 10 10 10 10 Hp 10 10 10 10 10 10 15 Hp 10 10 10 10 10 10 20 Hp 20 20 20 20 20 20 25 Hp 20 20 20 20 20 20 30 Hp 40 40 40 40 40 40 40 Hp 40 40 40 40 40 40 50 Hp 60 Hp 40 40 40 40 40 40 75 Hp 60 60 60 60 60 60 100 Hp 75 75 75 75 75 75

Condenser Grilles

Standard Efficiency 100 100 100 100 125 125 High Efficiency 100 125 125 125 125 NA

Condenser Louvers

Standard Efficiency 225 225 225 225 290 290

High Efficiency 225 290 290 290 290 NA Service Valves and Replacable Core Filter Drier 40 45 45 50 50 50 Low Ambient 50 50 50 50 50 50 UV Lights 100 100 100 130 130 130 Marine Lights 75 75 75 75 75 75 Split - 2 Piece Unit 268 268 268 280 280 280

LEGEND

ODP — Open Drip Proof TEFC — Totally Enclosed, Fan Cooled VFD — Variable Frequency Drive

NOTE: Please refer to E-CAT for selection.

(75)

40 40 40 40 40 40

48N UNIT SIZE (TON NOMINAL CAPACITY)

(90)

(105)

(120)

(130)

(150)

FAN

Standard Fan 75-105 Tons Nominal Capacity

Standard Fan 120-150 Tons Nominal Capacity

High Static 75-150 Tons Nominal Capacity

FAN

Standard Fan 75 Tons Nominal Capacity

Standard Fan 90-150 Tons Nominal Capacity

High Static 75-090 Tons Nominal Capacity

High Static 105-150 Tons Nominal Capacity

Table 3 — Supply Fan and Drive Data

MOTOR HPMOTOR

100 1775 2.875 1250

RPM

50 1770 2.125 1800 40 1770 2.125 1600 3B5V68 B 2 1/8 3B5V74 B 2 1/4 5VX540 3 1628/1628 30 1765 1.875 1450 3B5V70 B 1 7/8 3B5V86 B 2 1/4 BX55 3 1448/1448 25 1765 1.875 1400 3B5V64 B 1 7/8 3B5V80 B 2 1/4 BX53 3 1425/1425 20 1765 1.625 1250 3B5V56 B 1 5/8 3B5V80 B 2 1/4 BX53 3 1255/1255 60 1775 2.375 1550 50 1770 2.125 1400 4B5V70 B 2 1/8 4R5V90 R1 2 1/2 5VX630 4 1412/1412 40 1770 2.125 1300 3B5V68 B 2 1/8 3R5V92 R1 2 1/2 5VX630 3 1328/1328 30 1765 1.875 1200 3B5V70 B 1 7/8 3R5V103 R1 2 1/2 5VX670 3 1229/1229 25 1765 1.875 1100 3B5V64 B 1 7/8 3R5V103 R1 2 1/2 5VX660 3 1125/1125

75 1775 2.375 1100 4B5V80 B 2 3/8 4R5V132 R1 3 5VX840 4 1098/1098 60 1775 2.375 1050 4B5V70 B 2 3/8 4R5V118 R1 3 5VX800 4 1077/1077 50 1770 2.125 1000 4B5V70 B 2 1/8 4R5V125 R1 3 5VX830 4 1013/1013 40 1770 2.125 900 3B5V68 B 2 1/8 3R5V140 R1 3 5VX850 3 918/918 30 1765 1.875 800 3B5V70 B 1 7/8 3B154R R1 3 BX88 3 821/821 25 1765 1.875 750 3B5V64 B 1 7/8 3B154R R1 3 BX87 3 753/753

MOTOR

SHAFT

SIZE (in.)

FAN RPM

FAN

SHAFT

SIZE (in.)

2.25

2.5

DRIVE

SHEAVE

BROWNING

4B5V70 B 2 1/8 4B5V68 B 2 1/4 5VX530 4 1821/1821

4B5V70 B 2 3/8 4R5V80 R1 2 1/2 5VX600 4 1595/1595

5R5V90 R1 2 7/8 5B5V124 R1 3 5VX830 5 1264/1264

BUSHING

TYPE

DRIVEN

SHEAVE

BROWNING

BUSHING

TYPE BELTS

QTY OF

BELTS

FAN

SPEED

(rpm)

Table 4 — Power Exhaust Fan and Drive Data

MOTOR HPMOTOR

7.5 1760 1.375 1100 2BK52H H 1 3/8 2B5V74 B 1 3/4 BX51 2 1120/1120

7.5 1760 1.375 950 2BK52H H 1 3/8 2B5V90 B 1 3/4 BX53 2 927/927

7.5 1760 1.375 425 2BK52H H 1 3/8 2TB184 Q1 2 1/2 AX81 2 425/425

RPM

30 1765 1.875 1200 25 1765 1.875 1150 3B5V64 B 1 7/8 3R5V103 R1 1 3/4 5VX560 3 1125/1125 20 1765 1.625 1125 3B5V56 B 1 5/8 3B5V90 B 1 3/4 BX52 3 1120/1120 15 1770 1.625 1100 2B5V64 B 1 5/8 2Q5V103 Q1 1 3/4 5VX580 2 1128/1128 10 1755 1.375 1100 2BK52H H 1 3/8 2B5V74 B 1 3/4 BX51 2 1117/1117

50 1770 2.125 1200 40 1770 2.125 1175 3B5V68 B 2 1/8 3R5V103 R1 1 3/4 5VX540 3 1197/1197 30 1765 1.875 1150 3B5V70 B 1 7/8 3B5V110 B 1 3/4 5VX580 3 1129/1129 25 1765 1.875 1125 3B5V64 B 1 7/8 3R5V103 R1 1 3/4 5VX550 3 1125/1125 20 1765 1.625 1100 3B5V56 B 1 5/8 3B5V90 B 1 3/4 BX52 3 1120/1120 15 1770 1.625 1050 2B5V64 B 1 5/8 2B5V110 B 1 3/4 5VX590 2 1036/1036 10 1755 1.375 1000 2BK52H H 1 3/8 2B5V80 B 1 3/4 BX51 2 1036/1036

40 1770 2.125 650 30 1765 1.875 625 3B5V70 B 1 7/8 3TB200 Q1 2 1/2 BX86 3 635/635 25 1765 1.875 600 3B5V64 B 1 7/8 3TB200 Q1 2 1/2 BX85 3 583/583 20 1765 1.625 550 3B5V56 B 1 5/8 3TB184 Q1 2 1/2 BX82 3 557/557 15 1770 1.625 500 2B5V64 B 1 5/8 25V2360E E 2 1/2 5VX950 2 490/490 10 1755 1.375 450 2BK52H H 1 3/8 2TB184 Q1 2 1/2 BX82 2 460/460

60 1775 2.375 600 50 1770 2.125 575 4B5V70 B 2 1/8 4R5V212 R1 3 5VX950 4 596/596 40 1770 2.125 550 3B5V68 B 2 1/8 3R5V212 R1 3 5VX930 3 579/579 30 1765 1.875 525 3B5V70 B 1 7/8 3B250R R1 3 BX103 3 509/509 25 1765 1.875 500 3B5V64 B 1 7/8 35V2360E E 3 5VX1000 3 488/488 20 1765 1.625 450 3B5V56 B 1 5/8 35V2360E E 3 5VX1000 3 428/428 15 1770 1.625 400 2B5V64 B 1 5/8 2B300R R1 3 BX112 2 391/391

MOTOR

SHAFT

SIZE (in.)

FAN RPM

FAN

SHAFT

SIZE (in.)

1.75

2.5

DRIVE

SHEAVE

BROWNING

3B5V70 B 1 7/8 3R5V103 R1 1 3/4 5VX570 3 1229/1229

4B5V70 B 2 1/8 4R5V103 R1 1 3/4 5VX540 4 1225/1225

3B5V68 B 2 1/8 35V1870E E 2 1/2 5VX830 3 657/657

4B5V70 B 2 3/8 4R5V212 R1 3 5VX930 4 597/597

BUSHING

TYPE

DRIVEN

SHEAVE

BROWNING

BUSHING

TYPE BELTS

QTY OF

BELTS

SPEED

(rpm)

FAN

Standard Return Fan All Sizes

High Static Return Fan 75 Tons Nominal Capacity

High Static Return Fan 90 Tons Nominal Capacity

High Static Return Fan 105-150 Tons Nominal Capacity

Table 5 — Return Fan Drive Data

MOTOR HPMOTOR

50 1770 2.125 1236 40 1770 2.125 1149 3B5V68 B 2 1/8 3R5V109 R1 2 1/2 5VX1000 3 1131/1131 30 1765 1.875 1025 3B5V70 B 1 7/8 3TB124 Q1 2 1/2 BX98 3 1015/1015 25 1765 1.875 940 3B5V64 B 1 7/8 3TB124 Q1 2 1/2 BX98 3 931/931 20 1765 1.625 930 3B5V56 B 1 5/8 3TB110 Q1 2 1/2 BX93 3 922/922 15 1770 1.625 890 2B5V64 B 1 5/8 2Q5V132 Q1 2 1/2 5VX1000 2 878/878 10 1755 1.375 770 2BK52H H 1 3/8 2TB110 Q1 2 1/2 BX90 2 761/761

7.5 1760 1.375 720 2BK52H H 1 3/8 2TB110 Q1 2 1/2 AX89 2 717/717 30 1765 1.875 850 25 1765 1.875 825 3B5V64 B 1 7/8 3R5V140 R1 3 5VX1120 3 825/825 15 1770 1.625 680 2B5V64 B 1 5/8 2B160R R1 3 BX112 2 728/728 10 1755 1.375 600 2BK52H H 1 3/8 2B154R R1 3 BX105 2 548/548

7.5 1760 1.375 550 2BK52H H 1 3/8 2B154R R1 3 BX105 2 549/549 40 1770 2.125 780 30 1765 1.875 750 3B5V70 B 1 7/8 3B160R R1 3 BX120 3 790/790 25 1765 1.875 720 3B5V64 B 1 7/8 3B160R R1 3 BX120 3 725/725 20 1765 1.625 650 3B5V56 B 1 5/8 3B154R R1 3 BX113 3 663/663 15 1770 1.625 600 2B5V64 B 1 5/8 2B200R R1 3 BX123 2 584/584 10 1755 1.375 520 2BK52H H 1 3/8 2B160R R1 3 BX112 2 528/528

7.5 1760 1.375 480 2BK52H H 1 3/8 2B184R R1 3 BX116 2 461/461 60 1775 2.375 720 50 1770 2.125 680 4B5V70 B 2 1/8 45V1870E E 3 5VX1320 4 676/676 40 1770 2.125 650 3B5V68 B 2 1/8 35V1870E E 3 5VX1320 3 657/657 30 1765 1.875 580 3B5V70 B 1 7/8 3R5V212 R1 3 5VX1400 3 594/594 25 1765 1.875 550 3B5V64 B 1 7/8 3B200R R1 3 AX128 3 555/555 20 1765 1.625 500 3B5V56 B 1 5/8 3B200R R1 3 BX128 3 513/513 15 1770 1.625 450 2B5V64 B 1 5/8 2B250R R1 3 AX136 2 444/444 10 1755 1.375 400 2BK52H H 1 3/8 2B200R R1 3 AX128 2 392/392

RPM

MOTOR

SHAFT

SIZE (in.)

FAN RPM

FAN

SHAFT

SIZE (in.)

2.5

DRIVE

SHEAVE

BROWNING

4B5V70 B 2 1/8 4R5V103 R1 2 1/2 5VX1000 4 1232/1232

3B5V70 B 1 7/8 3R5V150 R1 3 5VX1120 3 841/841

3B5V68 B 2 1/8 3R5V160 R1 3 5VX1230 3 768/768

4B5V70 B 2 3/8 4B174R R1 3 BX133 4 693/693

BUSHING

TYPE

DRIVEN

SHEAVE

BROWNING

BUSHING

TYPE BELTS

QTY OF

BELTS

FAN SPEED

(rpm)

Table 6 — Refrigerant Charge

(NOMINAL CAPACITY, TONS) UNIT CONFIGURATION

UNIT SIZE

(75)

(90)

(105)

(120)

(130)

(150)

Standard Capacity Standard Efficiency 46.5 52.6 46.5 69.6

High Capacity Standard Efficiency 62.9 69.0 62.9 86.0 Standard Capacity High Efficiency 50.2 56.5 50.2 73.5

High Capacity High Efficiency 67.0 73.5 67.0 90.5

Standard Capacity Standard Efficiency 55.4 52.0 55.4 71.5

High Capacity Standard Efficiency 67.8 68.5 67.8 88.3 Standard Capacity High Efficiency 59.0 57.2 59.0 76.7

High Capacity High Efficiency 73.8 73.8 73.8 94.0

Standard Capacity Standard Efficiency 71.5 67.9 71.5 87.4

High Capacity Standard Efficiency 89.5 81.9 89.5 101.4 Standard Capacity High Efficiency 77.5 72.9 77.5 92.4

High Capacity High Efficiency 91.6 88.2 91.6 107.7

Standard Capacity Standard Efficiency 59.9 57.1 59.9 76.6

High Capacity Standard Efficiency 80.3 77.1 80.3 96.6 Standard Capacity High Efficiency 66.5 63.3 66.5 82.8

High Capacity High Efficiency 87.1 83.3 87.1 102.8

Standard Capacity Standard Efficiency 84.9 81.2 84.9 100.7

High Capacity Standard Efficiency 106.0 99.5 106.0 119.0 Standard Capacity High Efficiency 84.5 80.7 84.5 100.2

High Capacity High Efficiency 105.5 99.0 105.5 118.5

Standard Capacity Standard Efficiency 82.5 82.0 82.5 101.5

High Capacity Standard Efficiency 103.5 101.2 103.5 121.7

CHARGE (LB) CHARGE (LB)

UNITS WITHOUT HUMIDI-MIZER

SYSTEM

Circuit A Circuit B Circuit A Circuit B

UNITS WITH HUMIDI-MIZER®

SYSTEM

“G” SUPPORT

TO END OF PEDESTAL

SEE CONDENSER

SECTION

DIMENSIONS ARE SHOWN IN INCHES. DIMENSIONS IN [ ] ARE IN MILLIMETERS.

SEE CONDENSER

SECTION

Fig. 3 — Roof Curb

48N Roof Curb Sizes N, P, Q

(75-105 Ton Nominal Capacity)

* Use Applied Rooftop Builder program to select the proper roof curb.

48N Roof Curb Sizes R, S, T

(120-150 Ton Nominal Capacity)

Fig. 3 — Roof Curb (cont)

PART NUMBER*

DIMENSION

A (in.)

DIMENSION

B (in.)

DIMENSION

C (in.) CRRFCURB225A00 361.11 258.61 49.50 CRRFCURB226A00 376.20 273.70 49.50 CRRFCURB227A00 385.11 282.61 49.50 CRRFCURB228A00 400.20 297.70 49.50 CRRFCURB229A00 427.61 325.11 49.50 CRRFCURB230A00 439.86 337.36 49.50 CRRFCURB231A00 442.70 340.20 49.50 CRRFCURB232A00 451.61 349.11 49.50 CRRFCURB233A00 454.95 352.45 49.50 CRRFCURB234A00 463.86 361.36 49.50 CRRFCURB235A00 466.70 364.20 49.50 CRRFCURB236A00 475.86 373.36 49.50 CRRFCURB237A00 478.95 376.45 49.50 CRRFCURB238A00 488.11 385.61 49.50 CRRFCURB239A00 490.95 388.45 49.50 CRRFCURB240A00 499.86 397.36 49.50 CRRFCURB241A00 503.20 400.70 49.50 CRRFCURB242A00 512.11 409.61 49.50 CRRFCURB243A00 514.95 412.45 49.50 CRRFCURB244A00 527.20 424.70 49.50 CRRFCURB245A00 536.36 433.86 49.50 CRRFCURB246A00 551.45 448.95 49.50 CRRFCURB247A00 560.36 457.86 49.50 CRRFCURB248A00 575.45 472.95 49.50

PART NUMBER*

DIMENSION

A (in.)

DIMENSION

B (in.)

DIMENSION

C (in.) CRRFCURB261A00 386.04 283.54 49.50 CRRFCURB262A00 398.04 283.54 61.50 CRRFCURB263A00 410.04 307.54 49.50 CRRFCURB264A00 422.04 307.54 61.50 CRRFCURB265A00 440.29 325.79 61.50 CRRFCURB266A00 452.54 350.04 49.50 CRRFCURB267A00 464.54 350.04 61.50 CRRFCURB268A00 464.79 362.29 49.50 CRRFCURB269A00 476.54 374.04 49.50 CRRFCURB270A00 476.79 362.29 61.50 CRRFCURB271A00 488.54 374.04 61.50 CRRFCURB272A00 488.79 386.29 49.50 CRRFCURB273A00 500.79 398.29 49.50 CRRFCURB274A00 500.79 386.29 61.50 CRRFCURB275A00 512.79 398.29 61.50 CRRFCURB276A00 513.04 410.54 49.50 CRRFCURB277A00 524.79 422.29 49.50 CRRFCURB278A00 525.04 410.54 61.50 CRRFCURB279A00 536.79 422.29 61.50 CRRFCURB280A00 537.04 434.54 49.50 CRRFCURB281A00 549.04 434.54 61.50 CRRFCURB282A00 561.29 458.79 49.50 CRRFCURB283A00 573.29 458.79 61.50 CRRFCURB284A00 585.29 482.79 49.50 CRRFCURB285A00 597.29 482.79 61.50

Fig. 4 — Roof Curb Condenser Section

Roof Curb Condenser Support

UNIT SIZE

NOMINAL TONS

COND COILS 2V COND COIL 3V

DIM.

75 ALL YES — 129.50 10.98 131.75±0.75 133.50

90 STD EFFICIENCY YES — 129.50 10.98 131.75±0.75 133.50

90 HIGH EFFICIENCY — YES 181.50 10.36 183.75±0.75 183.25

105 STD EFFICIENCY YES — 129.50 10.98 131.75±0.75 133.50

105 HIGH EFFICIENCY — YES 181.50 10.36 183.75±0.75 183.25

120 STD EFFICIENCY YES — 129.50 10.98 131.75±0.75 133.50

120 HIGH EFFICIENCY — YES 181.50 10.36 183.75±0.75 183.25

130 ALL — YES 181.50 10.36 183.75±0.75 183.25

150 ALL — YES 181.50 10.36 183.75±0.75 183.25

ACCESSORY PART

NUMBER

CRRFCURB286A00 — 129.50 10.98 — —

— CRRFCURB287A00 181.50 10.36 — —

DIMENSIONS ARE SHOWN IN INCHES. DIMENSIONS IN [ ] ARE IN MILLIMETERS.

Step 5 — Install Curb Gasketing — After ductwork

SUPPLY

RETURN

5 ALONG SUPPLY SECTION END RAIL

Fig. 5 — Gasket Location on Roof Curb

a48-8724

Fig. 6 — Gasket Location — Condenser Section Roof Curb

has been connected to the roof curb, apply gasket material

(

/2-in. thick x 11/2-in. wide neoprene) where indicated.

Single-Thickness Gasketing (See Fig. 5 for Item Numbers) — Apply gasketing in the following places:

1. Along both side rails (1) — 2 places, full length

2. Along return air end rail (2) — 1 place

3. Around return air internal duct flange (3) — 1 or 2 places

4. Around supply air internal duct flanges (4) — 3 places

5. Along supply section base rail (5) — 1 place

Condenser Section Roof Curb (See Fig. 6)

— Apply single-

thickness gasket along both side rails (5).

Step 6 — Install Field-Fabricated Ductwork

WARNING

For vertical supply and return units, tools or parts could drop into ductwork and cause an injury. Install a 90-degree elbow in the supply and return ductwork between the unit and the conditioned space. If a 90-degree elbow cannot be installed, then a grille of sufficient strength and density should be installed to prevent objects from falling into the conditioned space. Failure to follow these instructions could result in personal injury or property damage due to falling objects.

Field-fabricated ductwork for vertical supply/vertical return units must be attached to the roof curb, or to the support steel, prior to the final rigging and installation of the unit. Supply and return duct dimensions are shown in Fig. 3.

To attach ductwork to roof curb, insert duct approximately 10 to 11 in. up into roof curb. Connect ductwork to 14-gage roof curb material with sheet metal screws driven from inside the duct.

Secure all ducts to the building structure, using flexible duct connectors between roof curbs and ducts as required. Ducts passing through an unconditioned space must be insulated and covered with a vapor barrier. Outlet grilles must not lie directly below unit discharge.

Design supply duct strong enough to handle expected static pressures. Field-fabricated ductwork for horizontal supply/return units must be attached to the unit.

Step 7 — Rig Unit — Do not drop unit; keep upright.

Use spreader bars over the unit to prevent sling or cable damage. Sheets of plywood placed along the condenser coils will provide additional protection. All lifting lugs MUST be used when lifting unit. Level by using unit frame as a reference. See Fig. 7-9 for information. Unit and accessory weights are shown in Tables 1 and 2. Weight distribution and center of gravity can be found in Fig. 10. Additional unit dimensional data can be found in Fig. 11 and 12.

Step 8 — Connect Condensate Drain — The drain

is a 2-in. FPT pipe connection located on the right-hand side of the unit looking at the unit from the return air end. See Fig. 11 and 12. Figure 13 shows the additional length of units with an extended chassis.

With field-supplied fittings and pipe sections, plumb the primary condensate drain to the 2-in. FPT connector on the base rail. Use a trap height of at least 7 inches. See Fig. 14 and 15. Apply a bead of RTV or similar sealant around the pipe joint at the connector in the base rail.

Fig. 7 — 48N 75-150 Ton Non-Split Rigging

Econ, Bar Rel, Standard filters, High Cap Evap, High Efficiency, High Static Supply Fan w/ largest motor, High Static PE w/ largest motor, No Heat, No Post section, No Humidimizer, No Extended Chassis, No Split, No Field Filter Section

Econ, Bar Rel, Standard filters, High Cap Evap, High Efficiency, High Static Supply Fan w/ largest motor, High Static Power Exhaust w/ Largest motor, Low gas he

at, No Post section, No Extended chassis, No humidimizer, No Split, No Field filter section

Fig. 8 — 48N 75-150 Ton Split (Main Unit) Rigging

Econ, Bar Rel, Cartridge filters, Hi Cap Evap, High Efficiency, High Static Supply Fan w/ largest motor, Hi Static Return Fan w/ largest motor, High Electric Heat, 8' Blank section w/ post filters, Extended chassis w/ humidimizer, Split, No Field filter section

Econ, Bar Rel, Cartridge filters, Hi Cap Evap, High Efficiency, High Static Supply Fan w/ largest motor, Hi Static Return Fan w/ largest motor, High gas heat, 8' Blank section w/ pos

t filters, Extended chassis

w/ humidimizer, Split, No Field filter

Fig. 9 — 48N 75-150 Ton Split (Return Section) Rigging

High Efficiency, High Static Supply Fan w/ largest motor, Hi Static Return Fan w/ largest motor, High Electric Heat, 8' Blank section w/ post filters, Extended chassis w/ humidimizer, Split, No Field filter section

Econ, Bar Rel, Cartridge filters, Hi Cap Evap, High Efficiency, High Static Supply Fan w/ largest motor,Hi Static Return Fan w/ largest motor, High gas heat, 8' Blank section w/ post filters

, Extended chassis

w/ humidimizer, Split, No Field filter

Cond End 0 0

Return End

NOMINAL

CAPACITY

(tons)

CORNER WEIGHTS (lb)

TOTAL (lb)

CENTER OF

GRAVITY

1234

A (in.) B (in.)

48 Series Non-Split

4,129 4,047 4,892 4,796 17,864 275.9 67.2

4,396 4,310 5,359 5,254 19,319 308.1 67.2

105

4,478 4,390 5,526 5,417 19,810 309.8 67.2

120

5,455 5,347 6,474 6,346 23,622 309.7 67.2

130

5,385 5,279 6,719 6,587 23,970 316.7 67.2

150

5,436 5,329 6,816 6,682 24,263 317.5 67.2

48 Series Split

4,684 4,592 5,690 5,578 20,544 355.1 67.2

4,969 4,871 6,273 6,149 22,261 390.3 67.2

105

5,052 4,952 6,544 6,415 22,964 394.8 67.2

120

6,058 5,939 7,583 7,443 27,013 401.0 67.2

130

5,972 5,854 7,845 7,691 27,361 409.6 67.2

150

6,021 5,903 7,944 7,787 27,654 410.3 67.2

Fig. 10 — Weight Distribution and Center of Gravity

a48-8793

Fig. 11 — 48N Unit Sizes N, P, Q (75-105 Ton Nominal Capacity)

Fig. 11 — 48N Unit Sizes N, P, Q (75-105 Ton Nominal Capacity) (cont)

NOMINAL

CAPACITY/

EFFICIENCY

EXTENDED

CHASSIS

SUPPLY

FAN

FIELD

USE

FILTER

SECTION

BLANK

SECTION

2-PIECE

UNIT

COND A B C D E F G H J K

75 ALL

90 STD EFF

105 STD EFF

STD

NO NO 2 498.11 314.42 48 177.02 266.07 499.35 202.75 119.76 — 313.36 4 FT YES 2 564.61 380.92 48 195.27 284.32 565.85 221.00 119.76 — 379.86 8 FT YES 2 612.86 429.17 48 195.27 284.32 614.10 221.00 119.76 — 428.11

YES

NO YES 2 576.86 393.17 48 255.77 344.82 578.10 281.50 119.76 — 392.11 4 FT YES 2 625.11 441.42 48 255.77 344.82 626.35 281.50 119.76 — 440.36 8 FT YES 2 673.36 489.67 48 255.77 344.82 674.60 281.50 119.76 — 488.61

HIGH

NO NO 2 513.20 329.51 48 177.02 281.16 514.44 217.84 119.76 — 328.45 4 FT YES 2 579.70 396.01 48 195.27 299.41 580.94 236.09 119.76 — 394.95 8 FT YES 2 627.95 444.26 48 195.27 299.41 629.19 236.09 119.76 — 443.20

YES

NO YES 2 591.95 408.26 48 255.77 359.91 593.19 296.59 119.76 — 407.20 4 FT YES 2 640.20 456.51 48 255.77 359.91 641.44 296.59 119.76 — 455.45 8 FT YES 2 688.45 504.76 48 255.77 359.91 689.69 296.59 119.76 — 503.70

YES

STD

NO NO 2 522.11 338.42 48 177.02 290.07 523.35 226.75 119.76 185.75 337.36 4 FT YES 2 588.61 404.92 48 195.27 308.32 589.85 245.00 119.76 204.00 403.86 8 FT YES 2 636.86 453.17 48 195.27 308.32 638.10 245.00 119.76 204.00 452.11

YES

NO YES 2 600.86 417.17 48 255.77 368.82 602.10 305.50 119.76 264.50 416.11 4 FT YES 2 649.11 465.42 48 255.77 368.82 650.35 305.50 119.76 264.50 464.36 8 FT YES 2 697.36 513.67 48 255.77 368.82 698.60 305.50 119.76 264.50 512.61

HIGH

NO NO 2 537.20 353.51 48 177.02 305.16 538.44 241.84 119.76 185.75 352.45 4 FT YES 2 603.70 420.01 48 195.27 323.41 604.94 260.09 119.76 204.00 418.95 8 FT YES 2 651.95 468.26 48 195.27 323.41 653.19 260.09 119.76 204.00 467.20

YES

NO YES 2 615.95 432.26 48 255.77 383.91 617.19 320.59 119.76 264.50 431.20 4 FT YES 2 664.20 480.51 48 255.77 383.91 665.44 320.59 119.76 264.50 479.45 8 FT YES 2 712.45 528.76 48 255.77 383.91 713.69 320.59 119.76 264.50 527.70

90 HI EFF

105 HI EFF

STD

NO NO 3 550.11 314.42 48 177.02 266.07 551.35 202.75 171.76 — 313.36 4 FT YES 3 616.61 380.92 48 195.27 284.32 617.85 221.00 171.76 — 379.86 8 FT YES 3 664.86 429.17 48 195.27 284.32 666.10 221.00 171.76 — 428.11

YES

NO YES 3 628.86 393.17 48 255.77 344.82 630.10 281.50 171.76 — 392.11 4 FT YES 3 677.11 441.42 48 255.77 344.82 678.35 281.50 171.76 — 440.36 8 FT YES 3 725.36 489.67 48 255.77 344.82 726.60 281.50 171.76 — 488.61

HIGH

NO NO 3 565.20 329.51 48 177.02 281.16 566.44 217.84 171.76 — 328.45 4 FT YES 3 631.70 396.01 48 195.27 299.41 632.94 236.09 171.76 — 394.95 8 FT YES 3 679.95 444.26 48 195.27 299.41 681.19 236.09 171.76 — 443.20

YES

NO YES 3 643.95 408.26 48 255.77 359.91 645.19 296.59 171.76 — 407.20 4 FT YES 3 692.20 456.51 48 255.77 359.91 693.44 296.59 171.76 — 455.45 8 FT YES 3 740.45 504.76 48 255.77 359.91 741.69 296.59 171.76 — 503.70

YES

STD

NO NO 3 574.11 338.42 48 177.02 290.07 575.35 226.75 171.76 185.75 337.36 4 FT YES 3 640.61 404.92 48 195.27 308.32 641.85 245.00 171.76 204.00 403.86 8 FT YES 3 688.86 453.17 48 195.27 308.32 690.10 245.00 171.76 204.00 452.11

YES

NO YES 3 652.86 417.17 48 255.77 368.82 654.10 305.50 171.76 264.50 416.11 4 FT YES 3 701.11 465.42 48 255.77 368.82 702.35 305.50 171.76 264.50 464.36 8 FT YES 3 749.36 513.67 48 255.77 368.82 750.60 305.50 171.76 264.50 512.61

HIGH

NO NO 3 589.20 353.51 48 177.02 305.16 590.44 241.84 171.76 185.75 352.45 4 FT YES 3 655.70 420.01 48 195.27 323.41 656.94 260.09 171.76 204.00 418.95 8 FT YES 3 703.95 468.26 48 195.27 323.41 705.19 260.09 171.76 204.00 467.20

YES

NO YES 3 667.95 432.26 48 255.77 383.91 669.19 320.59 171.76 264.50 431.20 4 FT YES 3 716.20 480.51 48 255.77 383.91 717.44 320.59 171.76 264.50 479.45 8 FT YES 3 764.45 528.76 48 255.77 383.91 765.69 320.59 171.76 264.50 527.70

Condenser Detail

UNIT

COND

COILS 2V

COND COIL 3VLOW

SOUND

DIMENSION

“S” 75 ALL YES — NO 92.62 75 ALL YES — YES 98.06

90 STANDARD EFFICIENCY YES — NO 92.62

90 HIGH EFFICIENCY —YESYES 98.06

90 STANDARD EFFICIENCY YES — YES 98.06

105 STANDARD EFFICIENCY YES — NO 98.06

105 HIGH EFFICIENCY —YESYES 98.06

105 STANDARD EFFICIENCY YES — YES 98.06

Fig. 12 — 48N Unit Sizes R, S, T (120-150 Ton Nominal Capacity)

139.88

BASE FRAME

A48-

Fig. 12 — 48N Unit Sizes R, S, T (120-150 Ton Nominal Capacity) (cont)

*Vertical discharge only.

NOMINAL

CAPACITY/

EFFICIENCY

EXTENDED

CHASSIS

HIGH

GAS

HEAT*

FIELD

USE

FILTER

SECTION

BLANK

SECTION

PIECE

UNIT

COND A B C D E F G H J K

MED

LOW

120 STD EFF

NO NO 2 523.04 339.35 48 186.86 291.00 524.28 227.68 119.76 — 338.29 2 1.5 4 FT YES 2 589.54 405.85 48 205.11 309.25 590.78 245.93 119.76 — 404.79 2 1.5 8 FT YES 2 637.79 454.10 48 205.11 309.25 639.03 245.93 119.76 — 453.04 2 1.5

YES

NO YES 2 601.79 418.10 48 265.61 369.75 603.03 306.43 119.76 — 417.04 2 1.5 4 FT YES 2 650.04 466.35 48 265.61 369.75 651.28 306.43 119.76 — 465.29 2 1.5 8 FT YES 2 698.29 514.60 48 265.61 369.75 699.53 306.43 119.76 — 513.54 2 1.5

YES

NO NO 2 535.04 339.35 60 186.86 291.00 536.28 227.68 119.76 — — 2 — 4 FT YES 2 601.54 405.85 60 205.11 309.25 602.78 245.93 119.76 — — 2 — 8 FT YES 2 649.79 454.10 60 205.11 309.25 651.03 245.93 119.76 — — 2 —

YES

NO YES 2 613.79 418.10 60 265.61 369.75 615.03 306.43 119.76 — — 2 — 4 FT YES 2 662.04 466.35 60 265.61 369.75 663.28 306.43 119.76 — — 2 — 8 FT YES 2 710.29 514.60 60 265.61 369.75 711.53 306.43 119.76 — — 2 —

YES

NO NO 2 547.04 363.35 48 186.86 315.00 548.28 251.68 119.76 195.56 362.29 2 1.5 4 FT YES 2 613.54 429.85 48 205.11 333.25 614.78 269.93 119.76 213.81 428.79 2 1.5 8 FT YES 2 661.79 478.10 48 205.11 333.25 663.03 269.93 119.76 213.81 477.04 2 1.5

YES

NO YES 2 625.79 442.10 48 265.61 393.75 627.03 330.43 119.76 274.31 441.04 2 1.5 4 FT YES 2 674.04 490.35 48 265.61 393.75 675.28 330.43 119.76 274.31 489.29 2 1.5 8 FT YES 2 722.29 538.60 48 265.61 393.75 723.53 330.43 119.76 274.31 537.54 2 1.5

YES

NO NO 2 559.04 363.35 60 186.86 315.00 560.28 251.68 119.76 195.56 — 2 — 4 FT YES 2 625.54 429.85 60 205.11 333.25 626.78 269.93 119.76 213.81 — 2 — 8 FT YES 2 673.79 478.10 60 205.11 333.25 675.03 269.93 119.76 213.81 — 2 —

YES

NO YES 2 637.79 442.10 60 265.61 393.75 639.03 330.43 119.76 274.31 — 2 — 4 FT YES 2 686.04 490.35 60 265.61 393.75 687.28 330.43 119.76 274.31 — 2 — 8 FT YES 2 734.29 538.60 60 265.61 393.75 735.53 330.43 119.76 274.31 — 2 —

120 HI EFF

130 ALL

150 STD EFF

NO NO 3 575.04 339.35 48 186.86 291.00 576.28 227.68 171.76 — 338.29 2 1.5 4 FT YES 3 641.54 405.85 48 205.11 309.25 642.78 245.93 171.76 — 404.79 2 1.5 8 FT YES 3 689.79 454.10 48 205.11 309.25 691.03 245.93 171.76 — 453.04 2 1.5

YES

NO YES 3 653.79 418.10 48 265.61 369.75 655.03 306.43 171.76 — 417.04 2 1.5 4 FT YES 3 702.04 466.35 48 265.61 369.75 703.28 306.43 171.76 — 465.29 2 1.5 8 FT YES 3 750.29 514.60 48 265.61 369.75 751.53 306.43 171.76 — 513.54 2 1.5

YES

NO NO 3 587.04 339.35 60 186.86 291.00 588.28 227.68 171.76 — — 2 — 4 FT YES 3 653.54 405.85 60 205.11 309.25 654.78 245.93 171.76 — — 2 — 8 FT YES 3 701.79 454.10 60 205.11 309.25 703.03 245.93 171.76 — — 2 —

YES

NO YES 3 665.79 418.10 60 265.61 369.75 667.03 306.43 171.76 — — 2 — 4 FT YES 3 714.04 466.35 60 265.61 369.75 715.28 306.43 171.76 — — 2 — 8 FT YES 3 762.29 514.60 60 265.61 369.75 763.53 306.43 171.76 — — 2 —

YES

NO NO 3 599.04 363.35 48 186.86 315.00 600.28 251.68 171.76 195.56 362.29 2 1.5 4 FT YES 3 665.54 429.85 48 205.11 333.25 666.78 269.93 171.76 213.81 428.79 2 1.5 8 FT YES 3 713.79 478.10 48 205.11 333.25 715.03 269.93 171.76 213.81 477.04 2 1.5

YES

NO YES 3 677.79 442.10 48 265.61 393.75 679.03 330.43 171.76 274.31 441.04 2 1.5 4 FT YES 3 726.04 490.35 48 265.61 393.75 727.28 330.43 171.76 274.31 489.29 2 1.5 8 FT YES 3 774.29 538.60 48 265.61 393.75 775.53 330.43 171.76 274.31 537.54 2 1.5

YES

NO YES 3 629.29 381.60 60 205.11 333.25 630.53 269.93 171.76 213.81 — 2 — 4 FT YES 3 677.54 429.85 60 205.11 333.25 678.78 269.93 171.76 213.81 — 2 — 8 FT YES 3 725.79 478.10 60 205.11 333.25 727.03 269.93 171.76 213.81 — 2 —

YES

NO YES 3 689.79 442.10 60 265.61 393.75 691.03 330.43 171.76 274.31 — 2 — 4 FT YES 3 738.04 490.35 60 265.61 393.75 739.28 330.43 171.76 274.31 — 2 — 8 FT YES 3 786.29 538.60 60 265.61 393.75 787.53 330.43 171.76 274.31 — 2 —

Condenser Detail

UNIT

COND

COILS 2V

COND

COIL 3V

LOW

SOUND

DIMENSION

“S”

120 STANDARD EFFICIENCY YES — NO 96.62

120 HIGH EFFICIENCY —YESYES 102.06 120 STANDARD EFFICIENCY YES — YES 102.06 130 STANDARD EFFICIENCY —YESNO 96.62

130 HIGH EFFICIENCY —YESYES 102.06 150 STANDARD EFFICIENCY —YESYES 102.06

Fig. 13 — Units with Optional Extended Chassis — Location of Coil Tracks

"J"

AUXILIARY COIL LOCATION

Auxiliary Coil Location — in.

UNIT

SIZES 48N (TONS)

HEIGHT B DISTANCE J

N, P, Q (75-105) 12.85

See dimension J on certified

drawings, pages 21-24

R, S, T (120-150) 12.85

Fig. 14 — Primary Drain Connection

A = 7-in. (178 mm) min

Fig. 15 — Condensate Drain Piping Details

(Slab and Curb Mounted)

SEALANT

3 IN DRAIN

INSIDE OF BASE RAIL

A MIN.

A/2

UNIT CURB

UNIT BASE RAIL

DRAIN PIPE IS FIELD SUPPLIED

Step 9 — Install Outdoor Hoods — Unit sizes 75

to 105 nominal tons will have three hoods on both sides. Unit sizes 120 to 150 nominal tons will have four hoods on both sides. Reference images shown are for three hoods. However, assembly of four hoods for the larger units is the same. Instructions for unpacking and assembly of hoods are below.

1. For shipping, outdoor air hoods are packaged in a box located inside the unit.

2. Remove the box from the unit (see Fig.16). a. Shipping support straps are bolted to the unit.

Remove four bolts on each, and discard straps.

b. Remove the hood supports (quantity 2 or 3 for

larger units) (see Fig. 17). c. Remove packaging from the unit. d. Reinstall hood supports (Fig. 17).

3. Remove filters located between return/exhaust fan and economizer dampers; these are packaged separately from hoods for shipping (see Fig. 16). Screws, other hardware and seal strips are packaged with the outdoor hoods (Fig. 16).

4. Apply seal strip to the unit. Strip should extend around entire opening (see Fig. 18).

5. Assemble hoods (see Fig. 19). a. Attach hood sides (Items 1 and 2) to the hood top

(Item 3). Fasten hood using six screws on each side. b. Attach hood support (Item 4) to hood top (Item 3). c. Attach angle (Item 5) to hood sides (two per hood).

Fasten angle to the hood side using three screws

per side. d. Attach hood support (Item 7) to top (Item 3) using

six screws. e. Attach clips (Item 8) to hood support (Item 7). f. Attach angle (Item 10) to hood support (Item 7)

using eight screws. g. Attach angle (Item 9) to angle (Item 10) using two

pop rivets. h. Place RTV or similar sealant on all of the 6 corners

to prevent water leaks. i. Install hood assembly to unit using four screws on

each side and nine screws on the top. j. Install filters (Item 6) to hood assembly.

6. Repeat Step 5 for each hood.

FILTERS

PACKAGING

OUTDOOR

HOODS

(BOTH SIDES)

SHIPPING SUPPORT STRAPS

Fig. 16 — Packaging Locations

a48-8725

HOOD SUPPORTS

(BOTH SIDES)

Fig. 17 — Hood Supports

a48-8726

SEAL STRIP

Fig. 18 — Seal Strips

a48-8727

Fig. 19 — Hood Assembly

a48-8728

Step 10 — Route Field Wiring — Field power wir-

ing is brought into the unit through the back of the power box near the bottom. Wiring can be brought through the roof curb through field-supplied watertight connections. See Fig. 20.

There are two 3

power box and a 7/8-in. hole in the side post for 24-v control wiring provided. Field-supplied couplings must be used when routing wiring into the control box.

See Fig. 20 for recommended disconnect location.

/8-in. holes for field power wiring in the

Step 11 — Make Field Electrical Connections

RECOMMENDED FIELD-SUPPLIED DISCONNECT LOCATION

Fig. 20 — Disconnect Location

CAUTION

Use care when drilling into corner post to avoid damage to condenser coil.

a48-8729

IMPORTANT: All units have variable frequency drives (VFD) factory installed. VFDs generate, use, and can radiate radio frequency energy. If units are not installed and used in accordance with these instructions, they may cause radio interference. They have been tested and found to comply with limits of a Class A computing device pursuant to International Standard EN 61000-2/3, which are designed to provide reasonable protection against such interference when operated in a commercial environment.

POWER WIRING — Units are factory-wired for the voltage shown on the unit nameplate. The main terminal block is suitable for use with copper wires only. Maximum wire size varies according to disconnect size.

DISCONNECT SIZE

250 Amps 400 Amps 600 Amps

QUANTITY...MAXIMUM WIRE SIZE

(MCM)

1...300

1...600

2...600

NOTE: Conduit used for field wiring must be sealed at the unit end of the conduit. Failure to do so could cause the conduit to act as a chimney in cold climates causing warm building air to condense in the power box.

Units without Factory-Installed Disconnect

— When installing units, provide a disconnect per NEC (National Electrical Code) of adequate size (MOCP [maximum overcurrent protection] of unit is on the informative plate). All field-wiring must comply with NEC and all local codes. Size wire based on MCA (minimum circuit amps) on the unit informative plate. See Fig. 21 for power wiring connections to the unit power terminal block and equipment ground. Maximum wire size is two (2) 500 MCM (maximum wire size) conductors per pole.

Units with Factory-Installed Disconnect

— The factoryinstalled disconnect is an interlocking, door-type. The disconnect handle locks the door when it is in the ON position. The disconnect handle must be in the OFF position to open the control box door. The disconnect is located in the power box behind the power box door for all units. See Fig. 22.

All field wiring must comply with NEC and all local codes. Wire must be sized based on MCA (minimum circuit amps) on the unit informative plate. See Fig. 23 for power wiring connections to the unit disconnect and equipment ground.

Operating Voltage

— Operating voltage to the unit must be

within the voltage range indicated on the unit nameplate.

Voltages between phases must be balanced within 2%, and the current must be balanced within 10%. See Table 7 for motor limits.

Use the following formula to determine the percentage of

voltage imbalance.

Voltage Imbalance

= 100 x

max voltage deviation from average voltage

average voltage

Example: Supply voltage is 460-3-60. AB = 452 v BC = 464 v AC = 455 v

Average Voltage =

452 + 464 + 455

1371

= 457

Determine maximum deviation from average voltage: (AB) 457 – 452 = 5 v

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

Maximum deviation is 7 v. Determine percent voltage imbalance:

% Voltage Imbalance = 100 x

457

= 1.53%

This amount of phase imbalance is satisfactory as it is be-

low the maximum allowable 2%.

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

Unit failure as a result of operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components.

DISCONNECT PER NEC

EQUIP GND

TB1

LEGEND

Fig. 21 — Field Power Wiring Connections

EQUIP — Equipment GND — Ground NEC — National Electrical Code TB — Terminal Block

a48-8466

POWER

Fig. 22 — Factory-Installed Disconnect Location

(End of Unit Shown)

a48-8730

13 12 11

22 21

DISCONNECT

PER NEC

EQUIP

GND

FIELD WIRE

FACTORY WIRE

Fig. 23 — Field Power Wiring Connections

for Factory-Installed Disconnect

LEGEND

EQUIP — Equipment GND — Ground NEC — National

Electrical Code

WIRING ENTRY

NOMINAL

FACTORY-INSTALLED DISCONNECT HANDLE LOCATION

BkW MAX BHP MAX BkW

7.5 5.6 8.6 6.39 12.0 10.0 91.7 10 7.5 11.5 8.56 14.3 12.0 91.7 15 11.2 17.3 12.89 22.0 19.0 93.0 20 14.9 22.9 17.10 28.7 23.0 93.6 25 18.7 28.7 21.41 36.3 28.4 93.6 30 22.4 34.5 25.71 41.7 36.3 94.1 40 29.8 45.9 34.27 55.0 43.8 94.1 50 37.3 57.4 42.83 71.0 52.8 94.5 60 44.8 68.9 51.41 83.0 60.5 95.0 75 59.5 86.1 64.25 101.0 80.5 95.0

100 74.6 114.8 85.67 132.0 106.0 95.4

LEGEND

Bhp — Brake Horsepower BkW — Brake Kilowatts

NOTE: Extensive motor and electrical testing on the Carrier units has ensured that the full horsepower range of the motor can be utilized with confidence. Using fan motors up to the horsepower ratings shown in the Motor Limitations table will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.

Table 7 — Motor Limits

MAX AMPS (EA)

460 V 575 V

RATED

EFFICIENCY

Step 12 — Connect Air Pressure Tubing — Be-

fore options such as the variable frequency drive (VFD) and/or modulating power exhaust can operate properly, the pneumatic tubing for pressure sensing must be installed. Use fire-retardant plenum tubing (field-supplied). All control devices use tubing. Tubing must be run from the appropriate sensing location (in the duct or in the building space) to the control device location in the unit.

VARIABLE FREQUENCY DRIVE — The tubing for the duct pressure (DP) control option should sample supply duct pressure approximately

/3 of the way out from the unit in the main trunk duct, at a location where a constant duct pressure is desired.

On these units, the duct pressure is sensed by a pressure transducer. The pressure transducer output is directed to the unit control module. On all sizes, the DP transducer is located in the unit control box. See Fig. 24 for control box details. Use a nominal

/4-in. plastic tubing.

Refer to appropriate base unit Controls, Start-Up, Operation, Service and Troubleshooting book for instructions on adjusting set points for duct pressure controls.

POWER EXHAUST — The tubing for the building pressure (BP) control (achieved via the modulating power exhaust option) should sample building pressure in the area near the entrance lobby (or other appropriate and sensitive location) so that location is controlled as closely to design pressures as possible.

These units use a pressure transducer for sensing building pressure. The BP transducer is located in the unit control box. Use a nominal

/4-in. plastic tubing.

For instructions on adjusting BP control set points, refer to the Controls, Start-Up, Operation, Service, and Troubleshooting book.

RETURN FAN — The tubing for the building pressure (BP) control (achieved via the return fan option) should sample building pressure in the area near the entrance lobby (or other appropriate and sensitive location) so that location is controlled as closely to design pressures as possible.

The units use a pressure transducer for sensing building pressure. The BP transducer is located in the unit control box. Use a nominal

/4-in. plastic tubing. For instructions on

/4-in.

adjusting BP control set points, refer to the Controls, StartUp, Operation, Service, and Troubleshooting book.

Step 13 — Remove Supply-Fan Shipping Bracket Screws —

must be removed from each corner of the fan sled before starting unit. See Fig. 25.

1. To remove shipping bracket screws, raise fan sled by turning adjusting bolt counterclockwise until spring is compressed slightly.

2. Remove screws holding shipping bracket to spring support.

NOTE: It is not necessary to remove the shipping bracket, only remove the screws.

3. After removing all shipping bracket screws, level fan sled using the adjusting screws.

Supply-fan shipping bracket screws

Step 14 — Remove Optional Power Exhaust Shipping Bracket Screws — Optional power exhaust

shipping bracket screws must be removed from each corner of the fan sled before starting unit.

1. To remove shipping bracket screws, raise fan sled by turning adjusting bolt counterclockwise until spring is compressed slightly.

2. Remove screws holding shipping bracket to spring support.

NOTE: It is not necessary to remove the shipping bracket, only remove the screws.

3. After removing all shipping bracket screws, level fan sled using the adjusting screws.

Step 15 — Remove Optional Return-Fan Shipping Brackets —

must be removed from each corner of the fan sled before starting unit. See Fig. 26.

To remove shipping brackets, remove 2 screws holding

each bracket to the cross rail. There are 4 brackets per unit.

After removing all shipping brackets, level the fan using the

adjustment screws.

Optional return fan shipping brackets

Fig. 24 — Control Box Component Arrangement

a48-8731

Fig. 25 — Supply Fan and Power Exhaust Fan Shipping Bracket Bolts

a48-8732

RETURN FAN SHIPPING BRACKET BOLTS

Fig. 26 — Return Fan Shipping Bracket Bolts

a48-8733

SHIPPING BRACKET SCREWS (4) EACH SPRING

SPRING SUPPORT

Step 16 — Connect Gas Piping — Unit is equipped

for use with natural gas only. Installation must conform with local building codes, or in the absence of local codes, with the National Fuel Gas Code (NFGC), ANSI Z223.1.

/8-in. NPT tapping plug, accessible for test gage connection, must be field-installed immediately upstream of gas supply connection to unit, but after manual gas valve. See Fig. 27. Natural gas pressure at unit gas connection must not be less than 5 in. wg or greater than 13 in. wg.

Size gas supply piping for 0.5 in. wg maximum pressure

drop. Do not use supply pipe smaller than unit gas connection.

CAUTION

Disconnect gas piping from unit when leak testing at pressures greater than 0.5 psig. Pressures greater than 0.5 psig will cause gas valve damage resulting in a hazardous condition. If gas valve is subjected to pressure greater than

0.5 psig, it must be replaced.

Step 17 — Configure Optional Modulating Gas Control —

dered with an optional factory-installed modulating gas control system that monitors heating operation of the rooftop.

Refer to the Controls, Start-Up, Operation, Service, and Troubleshooting book for information on configuring the modulating gas control.

The 48N Series large rooftop units may be or-

Step 18 — Install Flue/Inlet Hoods — The

*NPT plug is field supplied. NOTE: Follow all local codes.

OUTLET FLUE HOOD

INLET HOOD

INLET

HOOD

Fig. 28 — Flue/Inlet Hood Locations

a48-8734

Fig. 29 — Flue Outlet Hood

flue/inlet hoods are shipped in a package taped to the basepan in the fan section. The flue (outlet) hoods are pre-assembled. The inlet hoods require assembly.

The hoods are to be installed on the heating section access panel as shown in Fig. 28. See Table 8 for a list of parts used to assemble each hood and quantities of each hood type used with each unit.

1. Remove shipping block-offs and shipping tape from all openings in the access panel.

2. Attach flue outlet hoods (see Fig. 28) to access panel using screws provided. Hoods are placed over each combustion outlet.

3. Inlet hoods are shipped unassembled and must be assembled on the access panel (see Fig. 29-31). Flanges of the hood top and sides should be installed on the inside of the access panel openings with the screws provided. The sides should be placed on the inside of the top hoods for all hood assemblies (6-in. and 14-in.). Attach speed clips to screen. Insert screen into bottom opening of 6-in. and 14-in. hoods and secure it with 3 screws. Attach view port cover over 14-in. inlet hood opening (Fig. 31). Secure with two screws.

Table 8 — Flue Hood and Inlet Hood Usage

Sizes 75-105

(Low Heat)

—— — — 3 3 3

23 3 4 3 4 4

HOOD TYPE PART LIST

Top (6-in.)

6-in. Inlet Hood

14-in. Inlet Hood

Flue Outlet Hood

Side (Left) Side (Right) Screen Speed Clips Screws

Top (14-in.) Side (Left) Side (Right) Screen Speed Clips Screws View Port Cover

Pre-assembled 2 3 3 4 3 4 5

Size 75

(High Heat)

Sizes 90, 105

(Medium Heat)

QUANTITY USED

Sizes 90, 105

(High Heat)

Sizes 120-150

(Low Heat)

Sizes 120-150

(Medium Heat)

Sizes 120-150

(High Heat)

Fig. 30 — Inlet Hood Assembly (6-in. and 14-in.)

VIEW PORT COVER

Fig. 31 — Inlet Hood View Port Cover

Installation (14-in.)

ACCESS PANEL OPENING

SIDE (TYP BOTH SIDES)

COVER (14-IN. HOOD ONLY)

SCREEN

SPEED CLIP

(TYP 3)

HOOD

Step 19 — Install Supply-Air Thermistors (Modulating Gas Units Only) — Supply-air therm-

istors are a field-installed, factory-provided component. Three supply-air thermistors are shipped with modulating gas units inside the unit control box. Thermistor wires must be connected to the SGC (staged gas control) in the unit control box. See Table 9. The supply-air thermistors should be located in the supply duct with the following criteria:

• downstream of the heat exchanger cells

• equally spaced as far as possible from the heat exchanger cells

• a duct location where none of the supply air thermistors are within sight of the heat exchanger cells

• a duct location with good mixed supply air

Table 9 — SGC Thermistor Designations

Step 20 — Install Unit Accessories — For appli-

cations requiring accessories, the following packages are available:

All units:

• space temperature sensor

•CO

sensor

• space temperature sensor with CO

• airflow switch

• filter switch

• smoke detector Refer to the individual accessory installation instruc-

tions in each accessory package for information on installing accessories.

sensor

THERMISTOR

SAT1 J8 – 1,2 (SGC)

SAT2 J8 – 3,4 (SGC)

SAT3 J8 – 5,6 (SGC)

LIMTTEMP J8 – 15,16 (SGC)

SGC — Staged Gas Controller

CONNECTION

POINT

FUNCTION AND LOCATION

Thermistors

Supply-Air Thermistor (SAT) — Inserted into supply section underneath the gas heat section (factory-provided, field-installed)

Limit switch Thermistor (LIMTTEMP) — Inserted next to the lower limit switch (factory-installed)

PART NO.

HH79NZ033

TOP RAIL

GUIDES

BASE RAIL

GUIDES

a50-8877

Fig. 32 — Base and Top Rail Guide Locations

a50-8878

Fig. 33 — Base Rail Guide

TOP RAIL GUIDE

a50-8879

Fig. 34 — Top Rail Guide

Two-Piece Unit Fit Up

1. Locate and remove split parts package from return section of unit. Open package and remove split unit parts. See Tables 10 and 11 for parts list.

2. Rig main unit section and return section separately.

3. Do not assemble main unit section and return section on ground and attempt to lift. Unit pieces must be assembled on roof curb.

4. Insert base rail guides into the base rails of the main unit section. Do not attach with screws yet. See Fig. 32 and 33.

5. Insert top rail guides into top rails of the main unit section. Do not attach with screws yet. See Fig. 32 and 34.

6. Rig and set the main unit section on the unit roof curb. Align the unit bulkhead with the supply opening in the roof curb.

7. Remove the roof cap, top cover and L brackets from the filter end of the return section. Save these parts for later installation. See Fig. 35 and 36.

8. Rig and set return section onto the roof curb using rail guides as an alignment aid. The return section must be within 2 in. of the main unit section. Slide base rail and top rail guides from main unit section rails partially into return section rails.

9. Install tar tape on edge of main unit base rails to seal base rail splice. See Fig. 37.

10. Using ¾-in. x 30-in. threaded rod, nuts, washers and backing plates provided, pull and secure the base rails together. See Fig. 38.

11. Attach (4) brackets to top rails. Using threaded rods, nuts, washers and backing plates provided, pull the top rails together and secure with top rail guide from Step 5. See Fig. 39. Remove threaded rods and brackets after securing top rail guide.

12. Place seal strip along both sides of basepan joint. Attach basepan covers to basepan joint. See Fig. 40.

13. Install L brackets, top cover and top cap joining main unit section and return section top cover assemblies. See Fig. 41 and 42.

14. Connect control wiring plugs located at unit split. All same color plugs should be connected together.

On units equipped with return air fan or power exhaust fan option, locate black, yellow, and blue power wires located at the split in main section. Run the wires through the grommet below the return air filters and through the grommet at the economizer damper. See Fig. 43. Run wires through wire trays, separate from control wires, to the return fan/power exhaust fan VFD on back wall of return section. Connect wires to VFD power terminal connections: Black to UL1, Yellow to V1, and Blue to W1. On units equipped with VFD bypass option connect the wires to the power distribution in the VFD bypass box: Black to L1, Yellow to L2, and Blue to L3. See Fig. 44.

Connect air pressure tubes located at split. All same numbered tubes should be connected together. See Table 12 for tubes associated with unit options.

15. Install side post on far side of unit. See Fig. 45.

16. Install side panels at main unit section/return section split. Install panel side brackets, 2 on each panel. See Fig. 45.

/8-in. x 6-in.

BASE RAIL GUIDE

Table 10 — 75-105 Nominal Ton Units Parts List

ITEM COMPONENT NUMBER QUANTITY COMPONENT NAME COMPONENT QUALIFIER

1 48NG501939 2 RAIL,MOUNTING SPLIT,BASE,GUIDE

2 48NG501935 2 ROD,THREADED 3 48NG501937 8 WASHER,PLATE 4 AU02AB361 4 WASHER,FLAT 5 AT11AB361 6 NUT,HEAVY HEX

/4-10 UNC 2A 30-in. L

/4-in. LRT SPLIT

/4-10

6 48NG501938 4 BRACKET,TIE LRT SPLIT TOP 7 AL48AM307 12 SCREW,HEXHD SR 8 48NG501936 2 ROD,THREADED 9 AU02AB242 4 WASHER,FLAT

10 AT39AB241 4 NUT,HEX

/4 X 5/

/8-16

/8-16 UNC 2A 6" L

11 48NG501940 1 PLATE,COVER SPLIT,BASEPAN 12 48NG501941 1 PLATE,COVER SPLIT,BASEPAN 15 AL31AY308 34 SCREW 16 AL79AU216 2 SCREW,HEXHD TF #10 X 1/2 17 48NG401017 1 POST ASSY,SIDE 6-in. (75-105 T) 18 48NG401072 2 PANEL ASSY,SIDE 12-in. (75-105 T) 19 48NG501897 3 BRACKET,PANEL SKIN JOINT 75-105T 21 AA06BS168 40 BOLT,HEXHD 28 AL56ZA003 42 SCREW

/4 X 0.75

/4 AB-14 X 5/8-in. SERR.

31 99SR120216142001 2 SEAL STRIP 33 48NG501629 2 PLATE JOIN SPLIT UNITS 40 PF0144 3 SEALER,PRESTITE 2-in. WIDE ROLL

Table 11 — 120-150 Nominal Ton Units Parts List

ITEM COMPONENT NUMBER QUANTITY COMPONENT NAME COMPONENT QUALIFIER

1 48NG501939 2 RAIL, MOUNTING SPLIT,BASE,GUIDE

2 48NG501935 2 ROD, THREADED 3 48NG501937 8 WASHER, PLATE 4 AU02AB361 4 WASHER, FLAT 5 AT11AB361 6 NUT, HEAVY HEX

/4-10 UNC 2A 30-in. L

/4-in. LRT SPLIT

/4-10

6 48NG501938 4 BRACKET, TIE LRT SPLIT TOP

7 AL48AM307 12 SCREW, HEXHD SR 8 48NG501936 2 ROD, THREADED 9 AU02AB242 4 WASHER, FLAT

10 AT39AB241 4 NUT, HEX

/4 X 5/

/8-16

/8-16 UNC 2A 6-in. L

11 48NG501940 1 PLATE, COVER SPLIT,BASEPAN 12 48NG501941 1 PLATE, COVER SPLIT,BASEPAN 15 AL31AY308 34 SCREW 16 AL79AU216 2 SCREW, HEXHD TF #10 X

17 48NG401018 1 POST ASSY, SIDE 6-in. (120-150 T) 18 48NG401070 2 PANEL ASSY, SIDE 12-in. (120-150 T) 19 48NG501896 3 BRACKET, PANEL SKIN JOINT 120-150T 20 48NG500998 2 HANDLE 21 AA06BS168 40 BOLT, HEXHD 38 AL56ZA003 42 SCREW

/4 X 0.75

/4 AB-14 X 5/8-in. SERR.

33 48NG501629 2 PLATE JOIN SPLIT UNITS 40 PF0144 3 SEALER, PRESTITE 2-in. WIDE ROLL

Table 12 — Air Pressure Tube Connections

OPTION CONTROL TUBE NUMBER

Return Air Fan RACFM Control PPSS 4, 5 and 6

Power Exhaust

Fan with CFM

Sensor

Outdoor Air CFM OACFM Control 7 and 8

EACFM Control 5 and 6

ROOF

a50-8880

Fig. 35 — Roof Cap and Top Cover Removal

L BRACKETS

a50-8881

Fig. 36 — L Bracket Removal

INSTALL TAR TAPE ON ENTIRE BASE RAIL EDGE

A50-8882

Fig. 37 — Tar Tape Location

a50-8883

Fig. 38 — Secure Base Rails

a50-8884

Fig. 39 — Top Rail Brackets

a50-8885

Fig. 40 — Basepan Joint/Cover

CAP

TOP COVER

BASEPAN JOINT/COVER

L BRACKETS

A50-8886

Fig. 41 — L Bracket Installation

a50-8887

Fig. 42 — Main Unit and Return Section

Top Cover Assemblies

Fig. 43 — Wire Routing

TOP CAPS

TOP

COVER

END CAPS

VFD

SEE DETAIL A

DETAIL A

RUN VFD POWER WIRES THROUGH THIS BUSHING, SEPARATE FROM CONTRO WIRES

VFD WITH BYPASS

A50-8889

Fig. 44 — Return Section Component Locations

A50-8890

Fig. 45 — Side Post and Panel Installation

DETAIL NN

VFD WITHOUT BYPASS

SEE DETAIL NN

SIDE POST FAR SIDE ONLY

SIDE

PAN EL

SIDE PAN EL BRACKETS

DETAIL NN

VFD DETAILS

CONTROLS INSTALLATION

Constant Volume (CV) / Staged Air Volume (SAV™) Units —

tions with additional control features, options, or accessories. Refer to the appropriate accessory installation instructions for more information on installing that accessory. Control options and accessories available for CV/SAV units are:

• thermostats

• differential enthalpy sensor

• return air humidity sensor

• outdoor air humidity sensor

• relative humidity space sensor

•CO

sensors

• fan status switch

• filter pressure transducer

• return smoke detector

• CEM (controls expansion module)

• EXB (economizer control board) module CONTROL WIRING — The unit can be controlled with a

Carrier-approved accessory electro-mechanical or electronic thermostat that has two stages of cooling, two stages of heating control, and an output for fan control. The thermostat may also include time of day scheduling or use scheduling routines built into the ComfortLink controls.

Install the thermostat according to the installation instructions shipped with the accessory thermostat. Locate thermostat assembly on a solid interior wall to sense average temperature.

The 48N units may be used in applica-

Route thermostat cable or equivalent leads of colored wire

Fig. 46 — Field Control Thermostat Wiring

a48-8735

Fig. 47 — T-55 or T-56 Wiring

a48-8736

from subbase terminals through conduit into the low voltage connections in the main control box. For thermostat TB201 connections, see Fig. 46.

NOTE: For wire runs up to 50 ft, use no. 18 AWG (American Wire Gage) 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 at the thermostat and will require a junction box and splice at the thermostat.

FIELD SUPPLIED THERMOSTAT

Y1 Y2 W1 W2 G

TB201

Variable Air Volume (VAV) Units — The 48N

units may be used in applications with additional control features, options, or accessories. Refer to the appropriate accessory installation instructions for more information on installing that accessory. Refer to the Controls and Troubleshooting manual for more information concerning installation and configuration of options and accessories. Control options and accessories available for VAV units are:

• thermostats

• differential enthalpy sensor

• return air humidity sensor

• outdoor air humidity sensor

• relative humidity space sensor

•CO

sensors

• fan status switch

• filter pressure transducer

• return smoke detector

• CEM (controls expansion module)

• EXB (economizer control board) module VAV CONTROL WIRING — The recommended types of

control wiring are shown below:

MANUFACTURER

Alpha 1895 —

American A21451 A48301

Belden 8205 884421

Columbia D6451 —

Manhattan M13402 M64430

Quabik 6130 —

Regular Wiring Plenum Wiring

PART NO.

COMMUNICATING SPACE TEMPERATURE SENSOR (T-58) — The communicating space temperature sensor (P/N 33ZCT58SPT) is wired to the Carrier Comfort Network (CCN) connections on TB202.

SPACE TEMPERATURE AVERAGING — Applications that require averaging using multiple space temperature sensors can be satisfied using either 4 or 9 sensors as shown in Fig.

48. NOTE: Only Carrier sensors may be used for standard T-55

space averaging. Sensors must be used in multiples of 1, 4, and 9 only, with total sensors wiring not to exceed 1000 ft.

NOTE: Do not use T-56 sensors for space temperature averaging because the 5-degree offset function will not work in a multiple sensor application.

HEAT INTERLOCK RELAY (VAV Units Only — Not Necessary for Digital Air Volume Applications) — Variable air volume (VAV) units using morning warm-up and/or occupied heating require that room terminals be controlled to a position that provides the minimum required heating cfm or greater when the unit goes into Heating mode. The HIR (heat interlock relay) function is provided for this control. When the unit goes into Heating mode, the HIR is energized to provide switch closure or opening (depending on how the field-supplied power source is set up) to open the room terminals. The field connections for the HIR are at TB201 terminals 9 and 10. See Fig. 49.

Option and Accessory Control Wiring —

The 48N Series units may be used in applications with additional control features, options, or accessories. Refer to the Controls, Start-Up, Operation, Service and Troubleshooting manual for more information concerning installation and configuration of options and accessories. Figures 49-59 contain wiring information on the following features:

• heat interlock relay (Fig. 49)

• outdoor air enthalpy switch (Fig. 50)

•CO

space sensor (Fig. 51)

• filter status switch (Fig. 52)

• fan status switch (Fig. 53)

• space humidity sensor (Fig. 54)

• return air humidity sensor (Fig. 54)

• return air CO

• return air smoke detector (Fig. 56)

• smoke control — fire shutdown (Fig. 57)

• smoke control — purge (Fig. 58)

• smoke control — evacuation (Fig. 58)

• smoke control — pressurization (Fig. 58)

• CCN connections (Fig. 59)

sensor (Fig. 55)

SEN

T56- SPTT55- SPT

SEN SET

JUMPER TERMINALS

SENSORS — Sensors should be wired using single twisted pairs of 20 AWG (American Wire Gage) conductor cable rated for the application, except for the T-56 accessory sensor which requires 3-conductor cable.

HUMIDITY CONTROL AND HOT WATER AND STEAM VALVES — These devices require 20 AWG twisted pair conductor cables rated for the application for the 4 to 20 mA signal.

SPACE TEMPERATURE SENSOR (T-55) — The space temperature sensor (P/N 33ZCT55SPT), if used, is wired to terminals in the unit main control box. To connect the space temperature sensor, see Fig. 47.

SPACE TEMPERATURE SENSOR (T-56) — The space temperature sensor (P/N 33ZCT56SPT), if used, is wired to terminals in the unit main control box. To connect the space temperature sensor, see Fig. 47.

UNIT TB201

TB201

T55

Fig. 48 — Space Temperature Averaging Wiring

NOTE: Use T-55 sensor only.

a48-8737

RCB

RELAY 5

Fig. 49 — Heat Interlock Relay Wiring

a48-8477

TB201

RED

BLK

T55

TB201

SENSOR 1

SPACE TEMPERATURE AVERAGING (4 SENSOR APPLICATION)

SENSOR 1

SENSOR 4

SENSOR 2

SENSOR 5

SENSOR 3

SENSOR 4

SENSOR 3

SENSOR 6

SENSOR 7

SPACE TEMPERATURE AVERAGING (9 SENSOR APPLICATION)

SENSOR 8

SENSOR 9

FIELD INSTALLED (FIELD SUPPLIED) JUMPER WHEN ENTHALPY SWITCH NOT USED

RCB J4

Fig. 50 — Outdoor Air Enthalpy Switch Wiring

a48-8478

MBB J8

TB201

Fig. 51 — CO2 Space Sensor Wiring

a48-8479

FILTER STATUS - RETURN SWITCH

GRA

BLK

CEM

AN 5

180 OHM

CEM

FILTER PRESSURE RETURN

FILTER STATUS - POST FILTER

FILTER PRESSURE - POST FILTER

BLU

VIO

AN 6

AN 7

GRA

ORN

BLU RED

Fig. 52 — Filter Status Wiring

a48-8738

RXB

Fig. 53 — Fan Status Switch Wiring

a48-8741

CEM J6

OA HUMIDITY

4 - 20 ma

SPACE HUMIDITY

4 - 20 ma

RETURN HUMIDITY

4 - 20 ma

PL29-1

PL29-2

RED

BLK

RED

BLK

ACCSY

24VDC

AN8

24VDC

AN9

24VDC

AN10

ORN

GRN

BLU

VIO

PL37-5

PL37-6

TB202

MIXED AIR HUMIDITY

4 - 20 ma

ACCSY

AN7

RED

ORN

TB203

Fig. 54 — Space and Return Air Humidity Sensor Wiring

a48-8740

RED

BRN

Fig. 55 — Return Air CO2 Sensor Wiring

a48-8483

TB201TB201

PL45-1

PL45-3

PL45-2

PL45-6

PL45-5

PL45-4

Fig. 56 — Return Air Smoke Detector Wiring

a48-8739

MBB

TB201

BLU

WHT

FIRE SHUTDOWN

Fig. 57 — Fire Shutdown Wiring

a48-8485

Fig. 58 — Purge, Evacuation, and Pressurization Wiring

a48-8486

TB201

MBB

Fig. 59 — CCN Connections

a48-8487

TB 202

RCB J4

Carrier Comfort Network® (CCN) Interface —

The 48N Series units can be connected to the CCN system if desired. The communication bus wiring is supplied and installed in the field. It consists of shielded, 3-conductor cable with shield wire.

The system elements are connected to the communication bus in a daisy chain arrangement. The positive pin of each system element communication connector must be wired to the positive pins of the system element on either side of it, the negative pins must be wired to the negative pins, and the signal pins must be wired to common pins. Wiring connections for the CCN system should be made at the terminal block using the screw terminals. The board also contains an RJ14 CCN plug that can be used to connect a field service computer. There is also another RJ14 LEN (Local Equipment Network) connection that is used to download software or connect a Navigator™ device.

NOTE: Conductors and drain wire must be 20 AWG minimum stranded, tinned copper. Individual conductors must be insulated with PVC, PVC/nylon, vinyl, Teflon*, or polyethylene. An aluminum/polyester 100% foil shield and an outer jacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a minimum operating temperature range of –4 to 140 F (–20 C to 60 C) is required. See Table 13 for cables that meet the requirements.

Table 13 — CCN Connection Approved

MANUFACTURER CABLE PART NO.

Alpha 2413 or 5463

American A22503

Belden 8772

Columbia 02525

IMPORTANT: When connecting the CCN communication bus to a system element, use a color coding system for the entire network to simplify installation and checkout.

The following color code is recommended:

SIGNAL

TYPE

+ RED 1

COMMON WHITE 2

– BLACK 3

NOTE: If a cable with a different color scheme is selected, a similar color code should be adopted for the entire network.

At each system element, the shields of its communication bus cables must be tied together. If the communication bus is entirely within one building, the resulting continuous field must be connected to a ground at one point only. If the communication bus cable exits from one building and enters another, the shields must be connected to grounds at the lightning suppressor in each building where the cable enters or exits the building (one point per building only).

To connect the unit to the network (Fig. 59):

1. Turn off power to the control box.

2. Cut the CCN wire and strip the ends of the red (+), white (common) and black (–) conductors. (If a different network color scheme is used, substitute appropriate colors.)

Shielded Cables

CCN BUS CONDUCTOR

INSULATION COLOR

COMM1 PLUG

PIN NO.

3. Wire the CCN to the screw terminals on the COMM board as follows:

a. Secure the red (+) wire to CCN screw terminal +

on the COMM board.

b. Secure the white (common) wire to CCN screw

terminal C on the COMM board.

c. Secure the black (–) wire to CCN screw terminal –

on the COMM board.

d. Secure shield wire to CCN screw terminal

SHIELD on the COMM board.

IMPORTANT: A shorted CCN bus cable will prevent some routines from running and may prevent unit from starting. If abnormal conditions occur, unplug the connector. If conditions return to normal, check CCN connector, and run new cable if necessary. A short in one section of the bus can cause problems with all system elements on the bus.

Optional UPC Open Installation

WIRING THE UPC OPEN TO THE MS/TP NETWORK — The UPC Open controller communicates using BACnet† on an MS/TP network segment communications at 9600 bps, 19.2 kbps, 38.4 kbps, or 76.8 kbps.

Wire the controllers on an MS/TP network segment in a daisy-chain configuration. Wire specifications for the cable are 22 AWG (American Wire Gage) or 24 AWG, low-capacitance, twisted, stranded, shielded copper wire. The maximum length is 2000 ft.

Install a BT485 terminator on the first and last controller on a network segment to add bias and prevent signal distortions due to echoing. See Fig. 60-62.

To wire the UPC Open controller to the BAS network:

1. Pull the screw terminal connector from the controller's BAS Port.

2. Check the communications wiring for shorts and grounds.

3. Connect the communications wiring to the BAS port’s screw terminals labeled Net +, Net -, and Shield.

NOTE: Use the same polarity throughout the network segment.

4. Insert the power screw terminal connector into the UPC Open controller's power terminals if they are not currently connected.

5. Verify communication with the network by viewing a module status report. To perform a module status report using the BACview keypad/display unit, press and hold the “FN” key then press the “.” key.

To install a BT485 terminator, push the BT485 on to the

BT485 connector located near the BACnet connector. NOTE: The BT485 terminator has no polarity associated with

it.

To order a BT485 terminator, consult Commercial Products

i-Vu

Open Control System Master Prices.

*Teflon is a registered trademark of DuPont. †BACnet is a registered trademark of ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers).

BACNET BAUD RATE DIP SWITCHES

ADDRESS ROTARY SWITCHES

POWER LED

RUN LED

ERROR LED

BACNET CONNECTION

BT485 TERMINATOR

Tx2 LED

Rx2 LED

Tx1 LED

Rx1 LED

Fig. 60 — UPC Open Controller

Fig. 61 — Open System Network Wiring

Fig. 62 — BT485 Installation

SPECIFICATION RECOMMENDATION

Cable Single twisted pair, low capacitance, CL2P, 22 AWG (7x30), TC foam FEP, plenum rated cable

Conductor 22 or 24 AWG stranded copper (tin plated)

Insulation Foamed FEP 0.015 in. (0.381 mm) wall 0.060 in. (1.524 mm) O.D.

Color Code Black/White

Twist Lay 2 in. (50.8 mm) lay on pair 6 twists/foot (20 twists/meter) nominal Shielding Aluminum/Mylar shield with 24 AWG TC drain wire

Jacket

DC Resistance 15.2 Ohms/1000 feet (50 Ohms/km) nominal

Capacitance 12.5 pF/ft (41 pF/meter) nominal conductor to conductor

Characteristic Impedance 100 Ohms nominal

Weight 12 lb/1000 feet (17.9 kg/km)

UL Temperature Rating

Voltage 300 Vac, power limited

Listing UL: NEC CL2P, or better

LEGEND

AWG — American Wire Gage CL2P — Class 2 Plenum Cable DC — Direct Current FEP — Fluorinated Ethylene Polymer NEC — National Electrical Code O.D. — Outside Diameter TC — Tinned Copper UL — Underwriters Laboratories

Table 15 — Open System Wiring Specifications and Recommended Vendors

MS/TP WIRING RECOMMENDATIONS — Recommendations are shown in Tables 14 and 15. The wire jacket and UL temperature rating specifications list two acceptable alternatives. The Halar* specification has a higher temperature rating and a tougher outer jacket than the SmokeGard† specification, and it is appropriate for use in applications where the user is concerned about abrasion. The Halar jacket is also less likely to crack in extremely low temperatures.

NOTE: Use the specified type of wire and cable for maximum signal integrity.

Smoke Control Modes — Rooftop units can be used

for aid in building smoke control in the event of a building fire. The available functions include: Fire Shutdown, Pressurization, Evacuation, and Smoke Purge. These functions are enhanced when multiple rooftop units are used to zone a building. See Table 16 and Fig. 57 and 58.

FIRE SHUTDOWN — Fire Shutdown mode terminates all unit operation (cooling, heating, supply fan, and power exhaust). This mode prevents recirculation of contaminated air back into the space. The mode will not allow admission into the space of unsuitable outside air. See Fig. 57 for wiring.

Table 14 — MS/TP Wiring Recommendations

SmokeGard Jacket (SmokeGard PVC) 0.021 in. (0.5334 mm) wall 0.175 in. (4.445 mm) O.D. Halar Jacket (E-CTFE) 0.010 in. (0.254 mm) wall 0.144 in. (3.6576 mm) O.D.

SmokeGard 167°F (75°C) Halar -40 to 302°F (-40 to 150°C)

WIRING SPECIFICATIONS RECOMMENDED VENDORS AND PART NUMBERS

Wire Type Description

MS/TP Network (RS-485)

Rnet 4 conductor, unshielded, CMP, 18 AWG, plenum rated. W184C-2099BLB 6302UE 21450 CLP0442

LEGEND

AWG — American Wire Gage CL2P — Class 2 Plenum Cable CMP — Communications Plenum Rated FEP — Fluorinated Ethylene Polymer TC — Tinned Copper

*Halar is a registered trademark of Solvay Plastics. †SmokeGard is a trademark of AlphaGary-Mexichem Corp.

22 AWG, single twisted shielded pair, low capacitance, CL2P, TC foam FEP, plenum rated. See MS/TP Installation Guide for specifications.

24 AWG, single twisted shielded pair, low capacitance, CL2P, TC foam FEP, plenum rated. See MS/TP Installation Guide for specifications.

Connect Air

International

W221P-22227 — 25160PV CLP0520LC

W241P-2000F 82841 25120-OR —

Belden RMCORP

Contractors

Wire and Cable

PRESSURIZATION — Pressurization mode is intended to keep smoke out of a zone. The factory-installed optional economizer is required for this function. Pressurization is accomplished by the following:

• opening the economizer (option)

• running the supply fan (optional inlet guide vanes open or optional VFD at normal duct static pressure set point)

• closing the power exhaust dampers (if installed as option or accessory)

• shutting off the power exhaust fans (if installed as option or accessory)

This allows the space to be overpressurized relative to adjacent zones and prevents or slows entry of smoke into this space from adjacent zones. See Fig. 58 for wiring.

EVACUATION — Evacuation mode removes smoke or undesirable air from interior spaces without reintroducing unsuitable air. The factory-installed optional economizer with option/ accessory power exhaust is required for this function. Evacuation is accomplished by the following:

• turning the supply fan off

• opening the economizer (option required)

• running the exhaust fans (option or accessory required)

• opening the exhaust dampers.

See Fig. 58 for wiring.

SMOKE PURGE — Smoke Purge mode removes smoke from the interior spaces and replaces it with fresh outside air. The factory-installed optional economizer with option/accessory power exhaust are required for this function. Smoke purge is accomplished by the following:

• turning supply fan on

• opening the economizer (option required)

• running the exhaust fans (option or accessory required)

• opening the exhaust dampers See Fig. 58 for wiring.

SMOKE CONTROL INSTALLATION — Implementation of the various smoke control modes on these units requires the installer to modify the unit wiring to add contacts (via either manual switches or relays) that will selectively interrupt and override standard factory control sequences. See Table 16 and Fig. 56 and 57 and the Controls, Start-Up, Operation, Service and Troubleshooting manual for more information.

Table 16 — Smoke Control Modes

FUNCTION

Supply Fan Off On Off On VFD† — Open/On — Open/On Economizer Closed Open Open Open Return Air

Damper Exhaust

Fans Exhaust

Damper

LEGEND

VAV — Variable Air Volume VFD — Variable Frequency Drive

*Power exhaust option required for this mode.

†Applicable to VAV units with appropriate options.

Fire

Shutdown

Open Closed Closed Closed

Off Off On On

Closed Closed Open Open

Pressur-

ization

MODE

Evacuation*

Smoke Purge*

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

Catalog No. 04-53480121-01 Printed in U.S.A. Form 48N-8SI Pg 48 10-16 Replaces: 48N-7SI

Carrier WeatherExpert 48N3, WeatherExpert 48N5, WeatherExpert 48N6, WeatherExpert 48N4, WeatherExpert 48N7 Installation Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

GENERAL

SAFETY CONSIDERATIONS

ACOUSTICAL CONSIDERATIONS

Location

Ductwork

Acoustic Insulation

INSTALLATION

Step 6 — Install Field-Fabricated Ductwork

Step 11 — Make Field Electrical Connections

Two-Piece Unit Fit Up

CONTROLS INSTALLATION

sensors

Optional UPC Open Installation