Carrier 48N User Manual

48N

HEATING A COOLING

Packaged Heating/Cooling Units

Installation Instructions

NOTE TO INSTALLER: Leave these instructions, the User’s

Manual, and Parts Replacement Guide with the unit after

installation.

A WARNING

Improper installation, adjustment, alteration, service, maintenance, or use can cause carbon monoxide poison ing, explosion, fire, electric shock, or other occurrences which may injure you or damage your property. Con

sult a quahfi^ed installer, service agency, or the gas suppher for information or assistance. The qualified agency must use factory authorized kits and accessories when modifying this unit.

NOTE: The installation of this unit must conform to the

guidelines presented in these unit Installation Instructions. Read and become familiar with this publication before start ing the installation.

INTRODUCTION

Model 48N Packaged Gas/Electric Unit is fully self-con tained, combination gas heating/electric cooling unit designed for outdoor installation. Model 48N may be installed either on a rooftop or groimd-level slab. See Fig. 1. For rooftop downflow applications, an accessory roof mounting curb must be used.

Model 48N Unit meets the California maximum oxides of nitrogen (Nox) emission regulations.

These units are equipped with an energy-saving, automatic, intermittent, electric spark ignition system that does not have a continuously burning phot. All units are manufac tured with natural gas controls.

These units are designed for a minimum continuous return air temperature of 60 °F. (dry bulb) or an intermittent opera tion down to 55°F. (dry bulb) such as when used with a

night set back thermostat. Model 48N is A.G.A. and C.G.A. design-certified. See

Tables 2 thru 7 for the heating input ratings. These units are factory-charged with R-22 refrigerant.

Installation is simple: connect gas supply, air ducts, highand low-voltage wiring, condensate drain, and instedl a fieldsupplied air filter.

All units can be connected into existing duct systems that

are properly sized and designed to handle an airflow of 350 to 450 Cfm per each 12,000 Btuh of rated cooling capacity.

See Tables 2 thru 7 for cooling and heating airflow require

ments.

NOTE: When installing any accessory item, see the manu

facturer’s Installation Instructions packaged with the ac cessory. The Qualified Agency must use factory authorized kits or accessories when modifying this unit.

Fig. 1—Model 48N

IMPORTANT—READ BEFORE INSTALLING

1. This installation must conform with all applicable local and national codes.

2. The power supply (volts, hertz, and phase) must corre spond to that specified on unit rating plate.

3. The electrical supply provided by the utility must be sufficient to handle load imposed by this unit.

4. Refer to the 48N dimensional drawing for locations of

gas inlet, electrical inlets, condensate drain, duct con nections, and required clearances before setting unit in place. Figs. 2 and 3.

5. Locate the unit where the vent cap will be a minimum

of 4-ft from openable windows or doors.

6. This installation must conform with local building codes and with the National Fuel Gas Code ANSI

Z223.1-1984 and Addenda Z223.la-1987 (In Canada, CAN/CGA B149.1, (2)-M86) or NFPA 54-1984 TIA-5484-1. Refer to Provincial and local plumbing or wastewater codes and other applicable local codes.

7. For outdoor installation on wood flooring or on class A,

B, C roof covering materials.

GENERAL

Model 48N Packaged Gas/Electric Unit has been designed and tested in accordance with ANSI Z21.47-1987, ARI Standard 210-81, and ARI Standard 270-84, CAN/CGA-2.3M86, CAN 1-2.17-M80, CAN 1-2.21-M85, CSA C22.2 No. 0-

1982, No. 3-1979 and No. 119-M1985. The appliance design is certified by the American Gas Association (A.G.A.) and Canadian Gas Association (C.G.A.) for use with natural or LP (propane) gases with appropriate controls and orifices.

A87316

Tab llalla

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

^ PC 101 Catalog No. 564-816 Printed in U.S.A. Form 48NT-9SI Pg 1 9-88 Replaces: 48NT-8SI

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EFFICIENCY RATING

CERTIFIED

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Unit Weights

Unit lbs.

48NLT018 47D 48NLT024 48NLT030 48NHT024

48NMT030

48NLT036 506 48NLT042

48NHT030 48NMT036 510 48NMT042

Above unit top

Duct side of unit____6 min. Side opposite blower access panel........30

Side opposite ducts NOTE: Provision must be made for fresh ambient air to reach the outdoor coil without recirculation of the air from the outdoor fan discharge.

Shipping Wt. Operating Wt.

474 454 490 480 460 486 476

516 496 500

520

48N REQUIRED CLEARANCES (Inches)

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

48 Blower access panel side

.........

30 Bottom of unit

lbs. A

450

470 103

486 107

480 106 490 108 500 110

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

Corner Wt. lbs.

B C D

126 126 99

100

127 127 100 132 132 103

101

129 129 101

105 133 133 105

136 136 107

109

139 139 109 134 134 106 137 137 108 140 140 110

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

BURNER ACCESS

RIGHT SIDE vmw

REAR VIEW

LEFT SIDE VIEM

FRONT VIFR

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EFFICIENCY RATING CERTIFIED

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Unit Weights

Shipping Wt.

550 556

594 600 060 624 630 636 616

48N REQUIRED CLEARANCES (Inches)

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

___

48 Blower access panel side

6 min. Side opposite blower access panel

OPTIONAL SUPPLY-

AIR OPENING

-OPTIONAL RETURN AIR OPENING

Unit lbs. lbs. A

48NHT036 48NVT036 48NHT042 570 550 122 48NVT042 576 48NLT048 48NMT048 48NHT048 48NLT060 48NMT060 48NHT060

Above unit top Duct side of unit

Side opposite ducts...........30 Bottom of unit

NOTE: Provision must be made for fresh ambient air to reach the outdoor coil without recirculation of the air from the outdoor fan discharge.

Operating Wt.

530 117 536 119

556 124 574 128 580 130 159 160 586 131 161 162 604 610 138

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

Corner Wt. lbs.

136

139 169 169 140

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

B C D

148

147 148 149 120 152 153 123 153 158 159 129

165 166 137 166 167 139

........

154

30 0

118

125

131 132

This publication contains the following:

Step 1. Moving and Setting Unit in Place Step Step Step Step Step Step Step Step Step 10.

Step 1—Moving and Setting Unit in Place

Condensate Disposal Venting Gas Piping Duct Connections Electrical Connections

7. Preparing Unit for Steurtup

8. Heating Section Startup and Adjustments

9. Cooling Section Startup and Adjustments Care and Maintenance

A CAUTION

Use spreader bars and crate top when rigging the unit to be lifted. Model 48N must be rigged for lifting as shown in Fig. 4. Use extreme caution to prevent dam age when moving the unit. Unit must remain in an upright position during eJl rigging and moving opera tions. The unit must be level for proper condensate

drainage; therefore, the ground-level pad or accessory roof-mounting curb must be level before setting the unit in place. When a field-fabricated support is used, ensure that the support is level and properly supports the unit.

A. Rooftop installation

A CAUTION

When installing the unit on a rooftop, be sure that the

roof will support the additional weight. Refer to Figs. 2 & 3 for Model 48N to obtain toted weight and corner weight information.

For downflow applications, an accessory roof-mounting curb must be installed on, and flashed into the roof before unit installation. The instructions for installing the acces sory curb are packaged with the curb.

For end-discharge applications place the unit on a level base

that provides proper support. On flat roofs, be sure that the unit is located at least 4-ins. above the highest expected water level on the roof to prevent flooding.

B. Ground-Level Installation

Place the unit on a sohd, level, concrete pad that is a mini

mum of 2-ins. thick and that extends approximately 2-in. beyond the casing on all four sides of the unit. Do not secure the unit to the pad except when required by local codes.

C. Clearances

The required minimiim operating and service clearances are shown in Figs. 2 and 3. Adequate combustion, ventilation and condenser air must be provided.

A CAUTION

Do not restrict condenser airflow. An air restriction at either the outdoor-air inlet (the entire surface of the out door cofl.) or the fan discharge can be detrimental to compressor hfe.

The condenser fan discharges through the top of the unit. Ensure that the fan discheirge does not recirculate to the condenser coil. Do not locate the unit in either a corner or under a complete overhead obstruction. The minimum clear ance under a partial overhang (such as a normal house roof overhang) is 48-ins. above unit top. The maximum horizon tal extension of a partial overhang must not exceed 48-in..

Do not locate the unit where water, ice, or snow from an overhang or roof wiU damage or flood the unit by falling on the top. Do not locate the unit where grass, shrubs, or other plants will interfere with the airflow either into or out of the unit. Do not install the unit on carpeting, tile, or other com bustible material other than wood flooring. Furnace may be installed on wood flooriag or on Class A, B, or C roof cover ing materials.

Step 2—Condensate Disposal NOTE: Ensure that condensate-water disposal methods

comply with local codes, restrictions, and practices. Model 48N disposes of condensate water through a 3/4-in.,

Male Female NPT drain fitting. See Figs. 2 and 3 for location.

Install a 2-in. trap at the drain fitting to ensure proper drainage. See Fig. 5. Make sure that the outlet of the trap is at least 1-in. lower than the unit drain pan connection to prevent the pan from overflowing. Prime the trap with water.

If the installation requires draining the condensate water away from the unit, connect a drain tube using a minimum of 7/8-in. OD copper tubing, 3/4-in. galvanized pipe, or 3/4-in. plastic pipe. Do not undersize the tube. Pitch the drain tube downward at a slope of at least 1-in. in every 10ft of horizontal run. Be sure to check the drain tube for leaks.

Condensate water can be drained directly onto the roof in

rooftop installations (where permitted) or onto a gravel apron in ground-level installations. When using a gravel apron, make sure it slopes away from the unit.

Step 3—Venting

The vent-cap assembly is shipped in the burner compart ment. Remove the access door to locate the assembly.

Table 1—Maximum Gas Flow Capacity of Pipe in Cubic Feet of Gas Per Hour for Gas

Pressures of 0.5 PSIG or Less and a Pressure Drop of 0.5 inch Water Coiumn

(Based on a 0.60 Specific Gravity Gas)

Nominal

Iron Pipe,

Size,

Inches

1/2 .622 3/4

1 1-1/4 1-1/2

Ref: Table 0^4, NFPA 54—1984

*This length includes an ordinary number of fittings.

Internal

Diameter,

Inches

.824

1.049

1.380

1.610

10 20 30 40 50 60 70 80 90

175 120 97 82 73 66 360 250

680 455 375 320 285 260 240 220 205 195 175 160 145 1,400 950 770 600 580 530 490 460 430 400 360 325 300 280 2,100 1,460 1,180 990 900 810

170 151 138

200

A CAUTION

The venting system is designed to ensure proper vent ing. The vent cap assembly must be installed as indi cated in this section of the unit Installation Instructions.

NOTE: Screw holes in the flue assembly and the unit flue

panel are not symmetrically located; thereby, ensuring proper orientation when installing these components.

Refer to Fig. 6 and install the vent cap as follows:

1. Place vent cap assembly over flue panel, orient screw holes in vent cap with holes in flue panel, and secure

vent cap in place by inserting the single screw on the right side of vent cap.

2. Place the vent cap guard over the vent cap, orient holes

in vent cap guard with holes in vent cap and flue panel.

Secure the entire assembly with the remaining two screws on the left side of vent cap and vent cap guard assembly.

Step 4—Gas Piping

The gas supply pipe enters the unit through the access hole provided. The gas connection to the unit is made to the 1/2-in. FPT gas inlet on the manual shutoff or gas valve.

Install a separate gas supply line that runs directly from the meter to the heating section. Refer to Table 1 and the National Fuel Gas Code for gas pipe sizing. Do not use cast-

iron pipe. Check the local utihty for recommendations con

cerning existing lines. Choose a supply pipe that is large enough to keep the pressure loss as low as practical. Never

use pipe smaller than the 1/2-in. FPT gas inlet on the unit

gas valve.

When instaUing the gas supply hne, observe local codes per taining to gas pipe installations. Refer to the National Fuel Gas Code ANSI Z223.1-1984 (In Canada, CAN/CGA B 149.1, (2)-M86) or NFPA 54-1984 in the absence of local buUding codes. Adhere to the following pertinent recom mendations:

1. Avoid low spots in long runs of pipe. Grade aU pipe 1/4-in. in every 15-ft to prevent traps. Grade all hori zontal runs downward to risers. Use risers to connect to heating section and to meter.

2. Protect all segments of piping system against physical and thermal damage. Support all piping with appropri ate straps, hangers, etc. Use a minimum of one hanger every 6-ft. For pipe sizes larger than 1/2-in., follow rec ommendations of national codes.

3. Apply joint compound (pipe dope) sparingly and only to male threads of joint when making pipe connections. Use only pipe dope that is resistant to action of lique fied petroleum gases as specified by local and/or national codes. Never use teflon tape.

Length of Pipe, Feet*

200

— —

135

125

750

100 125

118

690 650 620 550 500 460 430

53 50 44

110 103 93

150 175

40 84 77 72

4. Install sediment trap in riser leading to heating sec tion. This drip leg functions as a trap for dirt and con densate. Install trap where condensate can not freeze. Install this sediment trap by connecting a piping tee to riser leading to heating section, so that straightthrough section of tee is vertical. See Fig. 7. Then, con nect capped nipple into lower end of tee. Extend capped nipple below level of gas controls.

Install an accessible, external, manual main shut-off

5. valve in gas supply pipe within 6-ft of heating section.

Install ground-joint union close to heating section

6. between unit manual shutoff and external manual main shut-off valve.

7. Pressure-test all gas piping in accordance with local and national plumbing and gas codes before connecting piping to unit.

NOTE: When pressure testing the gas supply system after

the gas supply piping has been coimected to the unit gas valve, the supply piping must be disconnected from the gas vedve during any pressure testing of the piping systems at test pressure in excess of 0.5 psig. When pressure testing the gas supply piping system at test pressures equal to or less than 0.5 psig, the unit heating section must be isolated from the gas piping system by closing the external main manual shut-off valve and slightly opening the ground-joint

union.

Fig. 6—Vent Cap Assembly

A73130

A CAUTION

Unstable operation may occur when the gas valve and manifold assembly are forced out of position while con necting improperly routed rigid gas piping to the gas valve. Use a backup wrench when making connection to avoid strain on, or distortion of, the gas control piping.

A CAUTION

If a flexible conductor is required or allowed by the authority having jurisdiction, black iron pipe shall be installed at the gas valve and extend a minimum of 2-ins. outside the unit casing.

A WARNING

Never use a match or other open flame when checking for gas leaks. Never purge gas line into combustion chamber. Failure to adhere to this warning could result in an explosion.

8. Check for gas leaks at all field-installed and factoryinstalled gas lines after all piping connections have been completed. Use soap-and-water solution (or method specified by local codes and/or regulations).

2. Select and size ductwork, supply-air registers, and return-air grilles according to ASHRAE recom mendations.

A CAUTION

When the duct-system fastening holes are being drilled into side of Model 48N instead of the unit duct flanges, use extreme ceire to avoid puncturing the coil or cofl. tubes.

3. Use flexible transition between rigid ductwork and unit to prevent transmission of vibration. The transition may be screwed or bolted to duct flanges. Use suitable gaskets to ensure weather and airtight seal.

4. Install external, field-supplied air filter(s) in return-air ductwork where it is easily accessible for service. Rec ommended filter sizes are shown in Tables 2 thru 7.

5. Size aU ductwork for maximum required airflow (either

heating or cooling) for unit being installed. Avoid abrupt duct size increases or decreases.

6. Adequately insulate and weatherproof all ductwork located outdoors. Insulate ducts passing thru uncondi tioned space, and use vapor barrier in accordance with latest issue of SMACNÀ and ACCA minimum installa tion standards for heating and air conditioning sys tems. Secure aU ducts to building structure.

7. Flash, weatherproof, and vibration-isolate all openings

in building structure in accordance with local codes and good building practices.

Step 6—Electrical Connections

A WARNING

The unit cabinet must have an uninterrupted, unbro ken, electrical ground to minimize the possibility of per sonal injury if an electrical fault should occur. This ground may consist of electrical wire connected to the unit ground lug in the control compartment, or conduit approved for electrical ground when installed in accor dance with the National Electrical Code ANSI/NFPA 70-1987 (in Canada, Canadian Electrical Code CSA C22.1) and local electrical codes. Do not use gas piping as an electrical ground. A failure to adhere to this warn ing could result in the installer being hable for the per sonal injury of others.

Step 5—Duct Connections

Model 48N has duct flanges on the supply- and return-air openings on the side and bottom of the unit. See Figs. 2 and 3 for connection sizes emd locations.

NOTE: The design and installation of the duct system must be in accordance with the standards of the National Fire Protection Association for installation of nonresidence-type air conditioning and ventilating systems, NFPA No. 90A or residence-type, NFPA No. 90B; and/or local codes and ordinances.

Adhere to the following criteria when selecting, sizing, and installing the duct system:

1. Remove appropriate panels from unit to obtain either side or bottom discharge. If models 48NLT018 thru 48NMT042 are installed in horizontal discharge apphcations, remove side duct covers, save screws, and install the covers on bottom duct openings. For models 48NHT036 thru 48NHT060 remove either side or bot tom duct covers as needed and discard.

A CAUTION

A failure to follow these precautions could result in damage to the unit being installed:

1. Make all electrical connections in accordance with National Electrical Code ANSI/NFPA 70-1987 and

local electrical codes governing such wiring. In Canada,

all electrical connections must be in accordance with CSA standard C22.1 Cemadian Electrical Code Part 1 and applicable local codes. Refer to Unit Wiring

Diagram.

2. Use only copper conductor for connections between field-supplied electrical disconnect switch and unit. DO NOT USE ALUMINUM WIRE.

3. Ensure that high-voltage power to unit is within oper ating voltage range indicated on unit rating plate. On 3-phase units, ensure that phases are balanced within 2%. Consult local power company for correction of improper voltage and/or phase balance.

Table 2—Specifications—Models 48N (Sizes NLT018300 thru NLT036600)

MODEL 48N SIZE Unit Volts—Phase (60 Hz) Operating Voltage Range Unit Full Load Amps Maximum Fuse Size (Amps) Minimum Ampacity for Wire Sizing* Minimum Wire Size (75 C Copper) Maximum Wire Length (Ft.) Cooling Capacity (Btuh)t Rated Cooling Airflow (cfm)t

External Static Pressure (In.

water)t

ARI Sound Rating^

Rated Heating Input (cfm)

Output Capacity (Btuh)** AFUE(%)**

Rated Heating Airflow (cfm) Recommended Minimum Field-

Supplied Filter Size (Sq ln.)tt

Disposable-Type Cleanable- or High-Capacity Type

LT018300 LT024300

208/230—1 208/230—1

187—253

(Applicable notes are listed below Table 4.)

48N 48N

HT024300 LT030300 MT030300

48N 48N

HT030300

208/230—1 208/230—1 208/230—1 208/230—1

11.5

187—253

14.2

187—253 187—253 187—253 187—253

14.2

16.8 16.8 17.3

20 25 25 30 30

13.6 17.1 17.1 20.4 20.4 14 60 70

17,800 23,800 23,800 29,000 29,000

600

0.10

7.8 40,000 40,000 60,000 40,000 31,000 31,000 46,000

12 12

10 10 10 10

100 100 100 75

29,000

800 800 1100 1100 1100 1300 1300

0.10 0.10 0.15 0.15 0.15 0.15 0.15

8.0 8.0 8.0 8.0 8.0 8.0 8.0 60,000 80,000 60,000 60,000 60,000

31,000 46,000 61,000 46,000 48,000

77.5 77.5 77.5 77.5 77.5 77.5 658 658 740 658

288 192 256

384 384 528

256 352

740 987

48N

20.7

48N 48N

LT036300 LT036500

208/230—1

187—253

208/230—3

187—253 414—506

21.2 14.6 40 25

26.9

18.6 12 65

35,200 35,200

77.5

—

987 987 987

624 416

48N

LT036600

460—3

7.7 15

9.0 14

110

35,200

1300

0.15

8.0

48,000

—

Table 3—Specifications—Models 48N (Sizes MT036300 thru VT036600)

MODEL SIZE

Unit Volts—Phase (60 Hz) Operating Voltage Range Unit Full Load Amps Maximum Fuse Size (Amps) Minimum Ampacity for Wire Sizing* Minimum Wire Size (75 C Copper) Maximum Wire Length (Ft.) Cooling Capacity (Btuh)f Rated Cooling Airflow (cfm)f

External Static Pressure (In.

water)t ARI Sound Ratingf: Rated Heating Input (cfm)

Output Capacity (Btuh)** AFUE(%)**

Rated Heating Airflow (cfm) Recommended Minimum FieldSupplied Filter Size (Sq ln.)tt

Disposable-Type Cleanable- or High-Capacity Type

48N 48N

MT036300

MT036500 MT036600 HT036300

48N 48N 48N

208/230—1 208/230—3 460—3

187—253

21.2 14.6 40

26.9 10 75

35,200

1300

0.15 0.15

8.0 80,000 61,000

77.5

187—253 414—506

7.7

25 15

18.6 9,0 12 14 41 65 110

35,200 35,200 35,800

1300 1300

0.15 0.15 0.15 0.15

8.0 8.0 8.0 80,000 80,00 100,0000 64,000 64,000 78,000

—

987 987 987 1481

624 416

HT036500 HT036600

208/230—1 208/230—3

48N

460—3 208/230—1

187—253 187—253 414—506

22.4 16.8 8.5 ' 40 25 15

26.2 19.3 9.8

12 12

60 70 70

35,800 35,800

1300 1300 1300

8.0 8.0 100,000 100,000 80,000 80,000

77.5

—

— 77.5

1481 1481

48N 48N

VT036300

VT036500 VT036600

208/230—3

187—253

187—253 414—506

22.4 16.8 40

26.2

19.3 9.8

10 10

100

35,800

1300

0.15

8.0

100

35,800 35,800

1300 1300

0.15

8.0 8.0 120,000 120,000 93,000 96,000

—

1367

1367 1367

624 416

(Applicable notes are listed below Table 4.)

Table 4—Specifications-

MODEL SIZE Unit Volts—Phase (60 Hz) Operating Voltage Range Unit Full Load Amps Maximum Fuse Size (Amps) Minimum Ampacity for Wire Sizing* Minimum Wire Size (75 C Copper) Maximum Wire Length (Ft.) Cooling Capacity (Btuh)t Rated Cooling Airflow (cfm)f

External Static Pressure (In.

water)t ARI Sound Rating^: Rated Heating Input (cfm)

Output Capacity (Btuh)** AFUE(%)**

Rated Heating Airflow (cfm) Recommended Minimum FieldSupplied Filter Size (Sq ln.)ft

Disposable-Type Cleanable- or High-Capacity Type

48N

LT042300

208/230—1

187—253

24.6 16.0 50

31.1

41,500

1500 1500

0.15 0.15

7.8 8.0

60,000 60,000 46,000 48,000 48,000

77.5

987

- Models 48N (Sizes LT042300 thru HT042600)

48N 48N 48N

LT042500 LT042600 MT042300

208/230—1 460—3

208/230—1 208/230—3

187—253 414—506 187—253

8.8 24.6

15 50 30

20.4 10.3 31.1 10

100 100

14 8 10

95 100 100

41,500 41,500 41,500

1500 1500

0.15 0.15 0.15 0.15

8.0 8.0

60,00 80,000 80,000

61,000 64,000 64,000

—

987

—

77.5

987 987 987 987

720 480

48N 48N

MT042500

MT042600 HT042300

460—3 208/230—1

187—253 414—506

16.0 8.8

2.4 10.3

41,500 41,500

1500 1500 1500

8.0 8.0 80,000 100,000

48N

187—253

26.7

15 45

31.7

14 10

41,500 41,500

0.15

8.2 8.2

78,000

77.5

1481 1481

48N 48N

HT042500

208/230—3

187—253

18.2 9.6 30

21.1

65 110

1500

0.15

100,000

80,000 80,000

— —

720 480

*lf other than 75 C copper wire is used, determine size from unit ampacity and the National Electrical Code. Voltage drop of wire must be less than 2%

of unit rated voltage. tRated in accordance with U.S. Government D.O.E. test procedures and/or ARI Standard 210. tRated in accordance with ARI Standard 270.

**The capacity ratings of single-phase units are in accordance with U.S. Government D.O.E. test procedures and/or A.G.A. certification requirements. For

3-phase units, the efficiency rating is a product thermal efficiency rating determined under continuous operating conditions, independent of any

installed system.

ttRequired filter areas shown are based on the larger of the ARI-rated cooling airflow or the heating airflow at a velocity of 300 ft/min for disposable type

or 450 ft/min for high-capacity type. Air filter pressure drop must not exceed 0.08 in.-water.

48N

460—3

8.5 15

100

0.15

120,000 96,000

—

HT042600

460—3

414—506

11.1 14

41,500

1500

0.15

8.2

100,000

1481

Table 5—Specifications—Models 48N (Sizes VT042300 thru MT048600)

MODEL 48N 48N 48N 48N

SIZE VT042300

Unit Volts—Phase (60 Hz)

Operating Voltage Range

Unit Full Load Amps Maximum Fuse Size (Amps) Minimum Ampacity for Wire Sizing* Minimum Wire Size (75 C Copper) 10 12

Maximum Wire Length (Ft.) Cooling Capacity (Btuh)f Rated Cooling Airflow (cfm)f

External Static Pressure (In.

water)t

ARI Sound Rating^:

Rated Heating Input (cfm)

Output Capacity (Btuh)** 93,000 96,000 96,000 AFUE(%)** 77.5

Rated Heating Airflow (cfm) Recommended Minimum Field-

Supplied Filter Size (Sq ln.)tt

Disposable-Type

Cleanable- or High-Capacity Type 480 544

208/230—1 208/230—3 460—3 208/230—1

187—253 187—253 414—506

26.7 45 30 15

31.7 75

41,500

1500

0.15 0.15 0.15

8.2

120,000

1367 1367 1367

VT042500 VT042600 LT048300

187—253 187—253

18.2 9.6 27.2 50 40 20

21.1 65

11.1 32.7 14

110 95

41,500 41,500 47,500

1500 1500 1700

0.20

8.2

120,000 120,000 80,000

62,000 64,000 48,000

—

77.5

1481

720 816

(Applicable notes are listed below Table 7.)

48N

LT048500

208/230—3

22.1

26.0 13.1 10

100

47,500

1700 1500

0.20

8.2

80,000

— —

1481

48N

LT048600

460—3

414—506

11.0

100

47,500

0.15

8.2

60,000

1481

48N

MT048300

208/230—1

187—253 187—253 414—506

27.5 22.1 11.0 50

32.7 26.1 13.1

8 10 14

47,500

1700

0.20 0.20 0.20

8.2 8.2 8.2

100,000 100,000 100,000

78,000

77.5

1481 1481 ,1481

48N 48N

MT048500

MT048600

208/230—3

40 20

100 100

47,500

1700 1700

80,000 80,000

— —

816 544

460-3

Table 6—Specifications—Models 48N (Sizes HT048300 thru MT060600)

MODEL

SIZE

Unit Volts—Phase (60 Hz)

Operating Voltage Range

Unit Full Load Amps Maximum Fuse Size (Amps) Minimum Ampacity for Wire Sizing* Minimum Wire Size (75 C Copper) Maximum Wire Length (Ft.) 75 65

Cooling Capacity (Btuh)t

Rated Cooling Airflow (cfm)t

External Static Pressure (In.

water)t ARI Sound Ratingf: Rated Heating input (cfm)

Output Capacity (Btuh)** AFUE (%)** 77.5

Rated Heating Airflow (cfm) Recommended Minimum FieldSupplied Filter Size (Sq ln.)tt

Disposable-Type Cleanable- or High-Capacity Type

48N

HT048300

48N 48N

HT048500 HT048600

208/230—1 208/230—3 460—3 208/230—1 208/230—3 460—3

187—253 187—253 414—506 187—253 187—253 414—506

27.5 22.1 11.0 40.8 31.6 14.6 50

32.7

26.0 13.1 48.5 37.0

10 12 14 8 10 14

47,500 47,500 47,500 59,500 59,500 59,500

1700

0.20 0.20

8.2 8.2 8.2 8.4 8.4 8.4

120,000

93,000 96,000 96,000

1367 1367 1367 1481 1481 1481

816 960 544

20 60 50 25

110 95 100 100

1700 2000 2000 2000

0.20 0.20

120,000 80,000

—

48N

LT060300 LT060500 LT060600

48N 48N

17.2 48.5

0.20 0.20

80,000 100,000

—

62,000

77.5

0.20

80,000

64,000 64,000

—

640

48N

MT060300 MT060500 MT060600

208/230—1

187—253

40.8 60 50 25

8 10

95 100 100

59,500 59,500 59,500

2000 2000 2000

8.4

78,000

77.5

1646 1646 1646

(Applicable notes are listed below Table 7.)

Table 7—Specifications-

MODEL SIZE HT060300 Unit Volts—Phase (60 Hz) 208/230—1 208/230—3 Operating Voltage Range Unit Full Load Amps Maximum Fuse Size (Amps) 60 50 Minimum Ampacity for wire Sizing* 48.5 37.0 Minimum Wire Size (75 C Copper) Maximum Wire Length (Ft.) 75 65 Cooling Capacity (Btuh)t Rated Cooling Airflow (cfm)t

External Static Pressure (in. water)t

ARI Sound Ratingt

Rated Heating Input (Btuh)**

Output Capacity (Btuh)** 93,000 96,000 96,000 AFUE(%)** 77.5

Rated Heating Airflow (cfm) Recommended Minimum Field-

Supplied Filter Sizeft

Disposable-Type Cleanable- or High-Capacity Type 640

- Models 48N (Sizes HT060300 thru HT060600)

48N 48N

187—253

40.8 31.6

10 12

59,500 59,500

2000 2000

0.20 0.20

8.4 8.4

120,000

1975 1975

HT060500 HT060600

187—253 414—506

120,000

— —

960

*lf other than 75 C copper wire is used, determine size from unit ampacity and the National Electrical Code. Voltage drop of wire must be less than 2%

of unit rated voltage. fRated in accordance with U.S. Government D.O.E. test procedures and/or ARI Standard 210. tRated in accordance with ARI Standard 270.

**The capacity ratings of single-phase units are in accordance with U.S. Government D.O.E. test procedures and/or A.G.A. certification requirements. For

3-phase units, the efficiency rating is a product thermal efficiency rating determined under continuous operating conditions, independent of any

installed system.

ttRequIred filter areas shown are based on the larger of the ARI-rated cooling airflow or the heating airflow at a velocity of 300 ft/min for disposable type

or 450 ft/mln for hIgh-capacIty type. Air filter pressure drop must not exceed 0.08 in.-water.

48N 48N

208/230—3 460-3

187—253

31.6

414—506

14.6

37.0 17.2 14

0.20 0.20

8.4

100,000 100,000

80,000

— —

80,000

960 640

48N

460—3

14.6 25

17.2 14

110

59,500

2000

0.20

8.4

120,000

1975

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