Carrier WeatherMaker 48A020 User manual

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480274-01 Printed in U.S.A. Form 48A-21SI Pg 1 11-21 Replaces: 48A-20SI
Installation Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
ACOUSTICAL CONSIDERATIONS . . . . . . . . . . . . . . . 3
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Acoustic Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Step 1 — Provide Unit Support . . . . . . . . . . . . . . . . . 4
• ROOF CURB
• ALTERNATE UNIT SUPPORT
Step 2 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . 4
• POSITIONING
• ROOF MOUNT
Step 3 — Field Fabricate Ductwork . . . . . . . . . . . . . 22
Step 4 — Make Unit Duct Connections . . . . . . . . . . 22
• 48A2, A3, A6, AND A7 UNITS
• 48A4, A5, A8, AND A9 UNITS
• 48A2020-050 UNITS
• 48A2060 UNITS
Step 6 — Trap Condensate Drain . . . . . . . . . . . . . . 23
Step 7 — Install Gas Piping . . . . . . . . . . . . . . . . . . . 23
• OPTIONAL STAGED GAS UNITS
Step 8 — Install Supply-Air Thermistors (Staged and
Modulating Gas Units Only) . . . . . . . . . . . . . . . . . 24
Step 9 — Make Electrical Connections . . . . . . . . . . 24
• POWER WIRING
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
Step 10 — Make Outdoor-Air Inlet Adjustments . . 28
• ECONOMIZER AND FIXED OUTDOOR AIR DAMPER
Step 11 — Position Power Exhaust/Barometric Relief
Damper Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Step 12 — Route VAV Static Pressure Sensors . . . 32
• VAV DUCT PRESSURE TRANSDUCER
• VAV BUILDING PRESSURE TRANSDUCER
Step 13 — Install All Accessories . . . . . . . . . . . . . . 32
• FIELD-FABRICATED WIND BAFFLES
• DUCTWORK
BACnet Communication Option Wiring . . . . . . . . . 35
• WIRING THE UPC OPEN CONTROLLER TO THE MS/
TP NETWORK
• MS/TP WIRING RECOMMENDATIONS
Using ZS Sensor or an Equipment Touch . . . . . . . 37
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. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations. Have fire extinguisher
available for all brazing operations.
It is important to recognize safety information. This is the safety-
alert symbol . When you see this symbol on the unit and in
instructions or manuals, be alert to the potential for personal
injury.
Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death. WARNING signifies hazards
which could result in personal injury or death. CAUTION is used
to identify unsafe practices, which may result in minor personal
injury or product and property damage. NOTE is used to highlight
suggestions which will result in enhanced installation, reliability,
or operation.
WARNING
Before performing service or maintenance operations on unit,
turn off main power switch to unit. Electrical shock could
cause personal injury.
WARNING
Improper installation, adjustment, alteration, service, or main-
tenance can cause property damage, personal injury, or loss of
life. Refer to the User’s Information Manual provided with this
unit for more details.
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal injury,
death and/or equipment damage.
R-410A refrigerant systems operate at higher pressures than
standard R-22 systems. Do not use R-22 service equipment or
components on R-410A refrigerant equipment.
WeatherMaker®
48A020-060
Single Package Gas Heating/Electric Cooling
Rooftop Units with ComfortLink Controls
and Puron®Refrigerant (R-410A)

2
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 system
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 un-sweat remaining tubing stubs when neces-
sary. Oil can ignite when exposed to torch flame.
Failure to follow these procedures may result in personal inju-
ry or death.
WARNING
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in death, serious
personal injury and/or property damage.
Disconnect gas piping from unit when pressure testing at
pressure greater than 0.5 psig (3450 Pa). Pressures greater than
0.5 psig will cause gas valve damage resulting in hazardous
condition. If gas valve is subjected to pressure greater than
0.5 psig, it must be replaced before use. When pressure testing
field-supplied gas piping at pressures of 0.5 psig or less, a unit
connected to such piping must be isolated by closing the
manual gas valve(s).
WARNING
CARBON-MONOXIDE POISONING HAZARD
Failure to follow instructions could result in severe personal
injury or death due to carbon-monoxide poisoning, if
combustion products infiltrate into the building.
Check that all openings in the outside wall around the vent
(and air intake) pipe(s) are sealed to prevent infiltration of
combustion products into the building.
Check that furnace vent (and air intake) terminal(s) are not
obstructed in any way during all seasons.
AVERTISSEMENT
RISQUE D’INTOXICATION AU MONOXYDE DE
CARBONE
Si ces directives ne sont pas suivies, cela peut entraîner des
blessures graves ou une intoxication au monoxyde de carbone
pouvant causer la mort, si des produits de combustion
s’infiltrent dans le bâtiment.
Vérifier que toutes les ouvertures pratiquées dans le mur
extérieur autour du ou des tuyaux d’évent (et de la prise d’air)
sont scellées de manière à empêcher l’infiltration de produits
de combustion dans le bâtiment.
Veiller à ce que la ou les sorties de l’évent de l’appareil de
chauffage (et la prise d’air) ne soient, en aucune façon,
obstruées, quelle que soit la saison.
WARNING
FIRE HAZARD
Failure to follow this warning could result in severe personal
injury and/or property damage.
Inlet pressure tap set screw must be tightened and 1/8-in. NPT
pipe plug must be installed to prevent gas leaks.
WARNING
FIRE HAZARD
Failure to follow this warning could result in severe personal
injury and/or property damage.
Manifold pressure tap set screw must be tightened and
1/8-in. NPT pipe plug must be installed to prevent gas leaks.
WARNING
If the information in this manual is not followed exactly, a fire
or explosion may result causing property damage, personal in-
jury or loss of life.
Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
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.
Installation and service must be performed by a qualified in-
staller, service agency or the gas supplier.
GAS VALVE
INLET PRESSURE
TAP SET SCREW
MANIFOLD
GAS VALVE
MANIFOLD PRESSURE
TAP SET SCREW

3
ACOUSTICAL CONSIDERATIONS
In order to minimize sound transmitted to the space, please con-
form 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 ft 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 ft 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 1/8-in. barium-loaded vinyl 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 addi-
tion to the acoustical pad.
Fig. 1 — Acoustical Considerations
AVERTISSEMENT
RISQUE D´INCENDIE OU D´EXPLOSION
Si les consignes de sécurité ne sont pas suivies à la lettre, cela
peut entraîner la mort, de graves blessures ou des dommages
matériels.
Ne pas entreposer ni utiliser d´essence ni autres vapeurs ou liq-
uides inflammables à proximité de cet appareil ou de tout autre
appareil.
QUE FAIRE SI UNE ODEUR DE GAZ EST DÉTECTÉE
• Ne mettre en marche aucun appareil.
• Ne toucher aucun interrupteur électrique; ne pas
utiliser de téléphone dans le bâtiment.
• Quitter le bâtiment immédiatement.
• Appeler immédiatement le fournisseur de gaz en
utilisant le téléphone d´un voisin. Suivre les
instructions du fournisseur de gaz.
• Si le fournisseur de gaz n´est pas accessible, appeler le
service d´incendie.
L´installation et l´entretien doivent être effectués par un instal-
lateur ou une entreprise d´entretien qualifié, ou le fournisseur
de gaz.
CAUTION
DO NOT re-use compressor oil or any oil that has been ex-
posed 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 com-
pleted. Failure to follow these procedures may result in dam-
age to equipment.
FLEXIBLE
CONNECTORS
SUPPLY AND
RETURN
VIBRATION
ISOLATORS
IN ROOF
CURB
INTAKE
PLENUM
SUPPLY
FAN
DISCHARGE
PLENUM COMPRESSOR/
CONDENSING
SECTION ALL ROOF
PENETRATIONS
SHOULD BE
SEALED
AIR TIGHT
ROUND DUCT CONTROLS
RUMBLE BEST
SUPPLY AND RETURN
DUCTS LINED WITH
ACOUSTICAL DUCT LINER

4
INSTALLATION
Step 1 — Provide Unit Support
ROOF CURB
For vertical discharge units, assemble or install accessory roof
curb in accordance with instructions shipped with this accessory.
(See Fig. 2-4.) Install insulation, cant strips, roofing, and counter
flashing as shown. Ductwork can be installed to roof curb before
unit is set in place. Curb should be level. This is necessary to
permit unit drain to function properly. Unit leveling tolerance is
shown in Fig. 2-4. Refer to Accessory Roof Curb Installation
Instructions for additional information as required. When
accessory roof curb is used, unit may be installed on class A, B, or
C roof covering material.
ALTERNATE UNIT SUPPORT
When the preferred curb or slab mount cannot be used, support
unit with sleepers on perimeter, using unit curb support area. If
sleepers cannot be used, support long sides of unit (refer to Fig. 5-
13) with a minimum number of 4-in. x 4-in. pads spaced as
follows: 48A20-035 units require 3 pads on each side; 48A040-
050 units require 4 pads on each side; 48A060 units require 6 pads
on each side. Unit may sag if supported by corners only.
Step 2 — Rig and Place Unit
Inspect unit for transportation damage. See Tables 1-6 for physical
data and specifications. File any claim with transportation agency.
Do not drop unit; keep upright. Use spreader bars over unit to pre-
vent sling or cable damage. This unit must be handled with a crane
and cannot be handled by a fork truck. Level by using unit frame
as a reference; leveling tolerance is shown in Fig. 2-4. See Fig. 14
for additional information. Unit operating weight is shown in
Table 2.
NOTE: On retrofit jobs, ductwork may be attached to the old unit
instead of a roof curb. Be careful not to damage ductwork when
removing old unit. Attach existing ductwork to roof curb instead
of unit.
Four lifting lugs are provided on the unit base rails as shown in
Fig. 5-13. Refer to rigging instructions on unit.
POSITIONING
Maintain clearance, per Fig. 5-13, around and above unit to pro-
vide minimum distance from combustible materials, proper air-
flow, and service access.
Do not install unit in an indoor location. Do not locate unit air
inlets near exhaust vents or other sources of contaminated air.
For proper unit operation, adequate combustion and ventilation
air must be provided in accordance with Section 5.3 (Air for
Combustion and Ventilation) of the National Fuel Gas Code,
ANSI Z223.1 (American National Standards Institute).
Although unit is weatherproof, guard against water from higher
level runoff and overhangs.
Locate mechanical draft system flue assembly at least 4 ft from
any opening through which combustion products could enter the
building, and at least 4 ft from any adjacent building. When unit is
located adjacent to public walkways, flue assembly must be at
least 7 ft above grade.
ROOF MOUNT
Check building codes for weight distribution requirements. See
Fig. 14. Unit operating weight is shown in Table 2.
CAUTION
Ensure clearances are in accordance with local installation
codes, the requirements of the gas supplier and the
manufacturer's installation instructions.
ATTENTION
Assurez-vous que les dégagements sont conformes aux codes
d'installation locaux, aux exigences du fournisseur de gaz et
aux instructions d'installation du fabricant.
CAUTION
1. All panels must be in place when rigging or damage to
unit may occur.
2. Unit is not designed for handling by fork truck. Damage
to unit may occur.
IMPORTANT: The gasketing of the unit to the roof curb is
critical for a watertight seal. Install gasket with the roof curb
as shown in Fig. 2-4. Improperly applied gasket can also result
in air leaks and poor unit performance.
Instructions continued on page 22.

5
Fig. 2 — Roof Curb — 48A2,A3,A6,A7020-035 Units
(48A2/A3/A6/A7-035 HIGH GAS HEAT ONLY)
NOTES:
1. Unless otherwise specified, all dimensions are to outside of part.
2. Roof curb accessory CRRFCURB005A00 is shipped disassembled.
3. All roof curb parts are to be 14 ga. galvanized steel.
4. Dimensions in [ ] are in millimeters. All other dimensions are in inches.

6
Fig. 3 — Roof Curb — 48A2,A3,A6,A7040-050 Units
NOTES:
1. Unless otherwise specified, all dimensions are to outside of part.
2. Roof curb accessory CRRFCURB006A00 is shipped disassembled.
3. All roof curb parts are to be 14 ga. galvanized steel.
4. Dimensions in [ ] are in millimeters. All other dimensions are in inches.

7
Fig. 4 — Roof Curb — 48A2,A3,A6,A7060 Units
a48-6717
NOTES:
1. Unless otherwise specified, all dimensions are to outside of part.
2. Roof curb accessory CRRFCURB014A00 is shipped disassembled.
3. All roof curb parts are to be 14 ga. galvanized steel.
4. Dimensions in [ ] are in millimeters. All other dimensions are in inches.

8
Fig. 5 — Base Unit Dimensions — 48A2,A3,A6,A7020-035
7. DIMENSIONS ARE IN INCHES [MM].

9
Base Unit Dimensions — 48A2,A3,A6,A7040-050
Fig. 6 — Base Unit Dimensions — 48A2,A3,A6,A7040-050
A48-8689
A48-8689
NOTES:
1. Weights include economizer.
2. center of gravity.
3. Unit clearances:
Top of units: no overhang
Condenser coil: 4’ - 0” [1219]
Economizer side: 6’ - 0” [1829]
Heat side: 4’ - 0” [1219]
Filter access side: 10’ - 0” [3048] (for
removal of evaporator coil)
4. Bottom ducts are designed to be attached to
accessory roof curb. If unit is mounted on
dunnage, it is recommended that the ducts
be supported by cross braces as done on
accessory roof curb.
5. Dimensions in [ ] are in millimeters. All other
dimensions are in inches.
*Operating weight includes largest indoor fan motor, micro-
channel heat exchanger, modulating power exhaust (vari-
able air volume units), and variable frequency drive
(variable air volume units).

10
Fig. 7 — Base Unit Dimensions — 48A4,A5,A8,A9020-035
6. DIMENSIONS ARE IN INCHES [MM].

11
Fig. 8 — Base Unit Dimensions — 48A4,A5,A8,A9040-050
*Operating weight includes largest indoor fan motor, micro-
channel heat exchanger, modulating power exhaust (vari-
able air volume units), and variable frequency drive
(variable air volume units).
NOTES:
1. Weights include economizer.
2. center of gravity
3. Unit clearances:
Top of units: no overhang
Condenser coil: 4’- 0” [1219]
Economizer side: 6’ - 0”[1829]
Heat side: 4’ - 0” [1219]
Filter access side: 10’ - 0” [3048] (for
removal of evaporator coil)
4. For smaller service and operational clear-
ances, contact Carrier application engineer-
ing department.
5. Bottom ducts are designed to be attached to
accessory roof curb. If unit is mounted on
dunnage, it is recommended that the ducts
be supported by cross braces as done on
accessory roof curb.
6. Dimensions in [ ] are in millimeters. All other
dimensions are in inches.

12
Fig. 9 — Base Unit Dimensions MCHX, Bottom Supply and Return — 48A2,A3,A6,A7060
FOR CENTERS OF GRAVITY,
OPERATING AND CORNER
WEIGHTS, SEE FIG. 13.
311.28
[7906.6]
85.09
[2161]
161.66
[4106]
133.69
[3396]
42.56
[1081]
65.91
[1674]
45.06
[1145]
41.72
[1060]
20.18
[513]
2.10
[53]
82.02
[2083]
2.99
[76]
7/8" DIA [22]
LOW VOLTAGE
78.60
[1997]
94.00
[2388]
91.50
[2324]
88.00
[2235]
49.53
[1258]
30.12
[765]
22.72
[577]
88.24
[2241]
TOP COVERS
10.49
[266]
50.00
[1270]
50.00
[1270]
50.00
[1270]
2.57
[65]
2.57
[65]
1"[25]
NPT DRAIN
CONN
1.375 DIA [35]
34.46
[875]
70.05
[1779]
29.40
[747]
24.40
[620]
8.05
[204]
44.28
[1125]
9.56
[243]
13.88
[353]
0.75 NPT LOW VOLTAGE
[19] 3.50 NPT FIELD POWER
[89]
24
[613]
24
[613]
15.53
[395]
15.93
[405]
8.60
[218]
162.90
[4138]
17.47
[444]
43.43
[1103]
92.63
[2353]
141.86
[3603]
7.50
[190]
19.06
[484]
17.91
[455]
42.31
[1075]
18.25
[464]
45.44
[1154]
OPENING
31.25
[795]
OPENING
HOOD REMOVED
DAMPER OPENING
WITH HOOD
WITH PANEL
PANEL REMOVED
VIEW A-A
NO POWER EXHAUST OR BAROMETRIC RELIEF
INDOOR BLOWER
ACCESS PANEL
HEAT SECTION
ACCESS PANEL
MCHX COILS
V
F
D
OVERALL LIFTING
SHIPPING DIM
LIFTING POSITION
BASE FRAME
TYP 4
PLACES
ECONOMIZER HOODS
(HOODS FIELD INSTALLED)
(INCLUDED WITH UNIT)
3 REQ'D
INDOOR MOTOR
ACCESS DOOR (HINGED)
FILTER/AUX CONTROL BOX
ACCESS DOOR (HINGED)
SUPPLY AIR
ECON
AIR
AUXILIARY
CONTROL
BOX
EXHAUST
AIR
POWER EXHAUST
OR BAROMETRIC
RELIEF HOODS
OPTION
3 REQ'D
2.50 [64] NPT
GAS INLET HOLE
MAIN CONTROL BOX
V
F
D
A
A
RETURN
SUPPLY
ACCESS DOORS (HINGED)
CONTROL BOX / COMPRESSOR
INSIDE BASE RAILS
RETURN
AIR
3" DIA [76]
FIELD WIRING (2)
LIFTING LUG
HOLE IN
WIND CAP
(FIELD
INSTALLED)

13
Fig. 10 — Base Unit Dimensions MCHX, Side Supply and Return — 48A4,A5,A8,A9060
311.28
[7906.6]
85.09
[2161]
161.66
[4106]
133.69
[3396]
42.56
[1081]
65.91
[1674]
45.06
[1145]
41.72
[1060]
20.18
[513]
2.10
[53]
82.02
[2083]
2.99
[76]
7/8" DIA [22]
LOW VOLTAGE
78.60
[1997]
94.00
[2388]
91.50
[2324]
88.00
[2235]
49.53
[1258]
30.12
[765]
22.72
[577]
88.24
[2241]
TOP COVERS
10.49
[266]
50.00
[1270]
50.00
[1270]
50.00
[1270]
2.57
[65]
2.57
[65]
1"[25]
NPT DRAIN
CONN
1.375 DIA [35]
34.46
[875]
70.05
[1779]
29.40
[747]
24.40
[620]
8.05
[204]
44.28
[1125]
9.56
[243]
13.88
[353]
0.75 NPT LOW VOLTAGE
[19] 3.50 NPT FIELD POWER
[89]
6.97
[177.0]
13.20
[335.3]
5.12
[130.0]
12.93
[328.3]
150.47 [3822.0]
12.63
[320.8]
43.43
[1103]
92.63
[2353]
141.86
[3603]
7.50
[190]
19.06
[484]
17.91
[455]
VIEW A-A
INDOOR BLOWER
ACCESS PANEL
HEAT SECTION
ACCESS PANEL
MCHX COILS
V
F
D
OVERALL LIFTING
SHIPPING DIM
LIFTING POSITION
BASE FRAME
TYP 4
PLACES
ECONOMIZER HOODS
(HOODS FIELD INSTALLED)
(INCLUDED WITH UNIT)
3 REQ'D
INDOOR MOTOR
ACCESS DOOR (HINGED)
FILTER/AUX CONTROL BOX
ACCESS DOOR (HINGED)
RETURN
AIR
SUPPLY
AIR
ECON
AIR
AUXILIARY
CONTROL
BOX
2.50 [64] NPT
GAS INLET HOLE
MAIN CONTROL BOX
V
F
D
A
A
ACCESS DOORS (HINGED)
CONTROL BOX / COMPRESSOR
INSIDE BASE RAILS
3" DIA [76]
FIELD WIRING (2)
LIFTING LUG
HOLE IN
WIND CAP
(FIELD
INSTALLED)
FOR CENTERS OF GRAVITY,
OPERATING AND CORNER
WEIGHTS, SEE FIG. 13.

14
Fig. 11 — Base Unit Dimensions RTPF, Cu Tube Condenser Side Supply and Return — 48A4,A5,A8,A9060
70.75
[1797]
65.91
[1674]
45.06
[1145]
41.72
[1060]
34.46
[875]
30.12
[765]
78.60
[1997]
TYP 4 PLACES
AUXILIARY
CONTROL
BOX
ECONOMIZER HOODS
(HOODS FIELD INSTALLED)
(INCLUDED WITH UNIT)
3 REQ'D
ACCESS DOORS (HINGED)
CONTROL BOX / COMPRESSOR
INDOOR MOTOR
ACCESS DOOR (HINGED)
FILTER/AUX CONTROL BOX
ACCESS DOOR (HINGED)
HEAT SECTION
ACCESS PANEL
INDOOR BLOWER
ACCESS PANEL
CONDENSER COIL
BOTH SIDES
3" DIA [76]
FIELD WIRING (2)
7/8' DIA [22]
LOW VOLTAGE
ECON
AIR
RETURN
AIR
1" [25] NPT
DRAIN CONN
BASE FRAME
LIFTING POSITION
OVERALL LIFTING
SHIPPING DIM
MAIN CONTROL BOX
INSIDE BASE RAILS
1.375 [35] DIA
HOLE IN
LIFTING LUG
V
F
D
V
F
D
VIEW A-A
A
A
3.50 [89] NPT FIELD POWER
SUPPLY
AIR
.75 [19] NPT LOW VOLTAGE
73.12
[1857]
42.56
[1081]
20.18
[513]
2.10
[53]
82.02
[2083]
2.99
[76]
8.05
[204]
24.40
[620]
29.40
[747]
85.09
[2161]
311.28
[7906.6]
22.72
[577]
94.00
[2388]
91.50
[2324]
88.00
[2235]
49.53
[1258]
133.69
[3396]
88.24 TOP COVERS
[2241]
10.49
[266]
50.00
[1270]
2.57
[65]
50.00
[1270]
2.57
[65]
50.00
[1270]
161.66
[4106]
6.97
[177.0]
13.20
[335.3]
5.12
[130.0]
12.93
[328.3]
150.47 [3822.0]
12.63
[320.8]
9.56
[243]
13.88
[353]
44.28
[1125]
LOW SOUND OUTDOOR FAN OPTION ONLY
(ALL FAN POSITIONS)
STANDARD OUTDOOR FAN
FOR CENTERS OF GRAVITY,
OPERATING AND CORNER
WEIGHTS, SEE FIG. 13.

15
Fig. 12 — Base Unit Dimensions RTPF, CU Tube Condenser Bottom Supply and Return — 48A2,A3,A6,A7060
85.09
[2161]
311.28
[7906.6]
88.24 TOP COVERS
[2241]
10.49
[266]
50.00
[1270]
2.57
[65]
50.00
[1270]
2.57
[65]
50.00
[1270]
161.66
[4106]
9.56
[243]
13.88
[353]
44.28
[1125]
78.60
[1997]
42.31
[1075]
18.25
[464]
31.25
[795]
OPENING
45.44
[1154]
OPENING
94.00
[2388]
91.50
[2324]
88.00
[2235]
49.53
[1258]
30.12
[765]
22.72
[577]
1"[25]
NPT
DRAIN
CONN
133.69
[3396]
42.56
[1081]
65.91
[1674]
45.06
[1145]
41.72
[1060]
20.18
[513]
2.10
[53]
82.02
[2083]
2.99
[76]
7/8" DIA [22]
LOW VOLTAGE
78.60
[1997]
1.375 DIA [35] 34.46
[875]
70.05
[1779]
29.40
[747]
24.40
[620]
8.05
[204]
17.47
[444]
162.90
[4138]
8.60
[218]
15.93
[405]
24
[613]
15.53
[395]
24
[613]
HEAT SECTION
ACCESS PANEL
INDOOR BLOWER
ACCESS PANEL
CONDENSER COIL
BOTH SIDES
MAIN CONTROL BOX
V
F
D
V
F
D
A
A
3.50 [89] NPT FIELD POWER
.75 [19] NPT LOW VOLTAGE
LOW SOUND OUTDOOR FAN OPTION ONLY
(ALL FAN POSITIONS)
STANDARD OUTDOOR FAN
HOOD REMOVED
DAMPER OPENING
WITH HOOD
WITH PANEL
PANEL REMOVED
VIEW A-A
NO POWER EXHAUST OR BAROMETRIC RELIEF
OVERALL LIFTING
SHIPPING DIM
LIFTING POSITION
BASE FRAME
TYP 4
PLACES
ECONOMIZER HOODS
(HOODS FIELD INSTALLED)
(INCLUDED WITH UNIT)
3 REQ'D
INDOOR MOTOR
ACCESS DOOR (HINGED)
FILTER/AUX CONTROL BOX
ACCESS DOOR (HINGED)
RETURN
AIR
SUPPLY AIR
ECON
AIR
AUXILIARY
CONTROL
BOX
EXHAUST
AIR
POWER EXHAUST
OR BAROMETRIC
RELIEF HOODS
OPTION
3 REQ'D
ACCESS DOORS (HINGED)
CONTROL BOX / COMPRESSOR
INSIDE BASE RAILS
3" DIA [76]
FIELD WIRING (2)
LIFTING LUG
HOLE IN
RETURN
SUPPLY
FOR CENTERS OF GRAVITY,
OPERATING AND CORNER
WEIGHTS, SEE FIG. 13.

16
Fig. 13 — Center of Gravity and Weights — 48A060
A
B
NOTES:
1. WEIGHTS INCLUDE ECONOMIZER OR OUTDOOR AIR DAMPER.
2. CENTER OF GRAVITY.
3. FOR MULTIPLE UNIT APPLICATIONS SEE LITERATURE.
4. UNIT CLEARANCES:
TOP OF UNITS: NO OVERHANG
CU TUBE CONDENSER COIL: 4'-0" [1219]
HEAT SIDE: 4'-0" [1219]
FILTER ACCESS SIDE:
15'-0" [4572] (FOR REMOVAL OF EVAPORATOR COIL)
5. FOR SMALLER SERVICE AND OPERATIONAL
CLEARANCES, CONTACT CARRIER APPLICATION
ENGINEERING DEPARTMENT.
6. BOTTOM DUCTS DESIGNED TO BE ATTACHED TO
ACCESSORY ROOF CURB. IF UNIT IS MOUNTED
ON DUNNAGE, IT IS RECOMMENDED THE DUCTS
MUST BE SUPPORTED BY CROSS BRACES AS
DONE ON ACCESSORY ROOF CURB.
7. BASE UNIT WEIGHTS INCLUDE OUTDOOR AIR HOODS,
AND FILTERS (INDOOR FAN MOTOR IS NOT INCLUDED).
ADD INDOOR MOTOR, FIOPS AND ACCESSORIES FOR
TOTAL OPERATING WEIGHT.
8. VAV MOTOR WEIGHTS INCLUDE INDOOR MOTOR, VFD,
VFD TRANSDUCER AND ASSOCIATED WIRING.
9. DIMENSIONS IN [ ] ARE IN MILLIMETERS, KILOGRAMS
OR KILOWATTS.
10. FOR SIDE-SUPPLY/RETURN APPLICATIONS, A SINGLE
RETURN AND SUPPLY DUCTWORK CONNECTION IS
RECOMMENDED FOR COVERING ALL THREE RETURN AND
ALL THREE SUPPLY OPENINGS. THE ENTIRE AREA
AROUND THE DUCT OPENINGS IS AVAILABLE FOR A
1.5" DUCT FLANGE ATTACHMENT.
UNIT SIZE
OPERATING
WEIGHT
CENTER OF GRAVITY CORNER WEIGHT (LB)
AB
LBS FT/IN FT/IN 1 2 3 4
48A2/A3/A6/A7 (D,M,S) 060 8386 14 - 9 5/8" 3 - 5 1/4" 1909 1693 2243 2541
48A2/A3/A6/A7 (E,N,T) 060 8626 14 - 2 3/8" 3 - 3 1/4" 2159 1745 2100 2622
48A4/A5/A7/A8 (D,M,S) 060 8426 14 - 1 5/8" 3 - 9 1/4" 1763 2072 2259 2333
48A4/A5/A7/A8 (E,N,T) 060 8676 13 - 7 1/4" 3 - 7 1/4" 2000 2126 2134 2417
50A2/A3/A6/A7 060 8311 15 - 5" 3 - 7 3/8" 1710 1663 2433 2504
50A4/A5/A7/A8 060 8526 14 - 8 1/2" 3 - 11 1/8" 1613 2078 2484 2351
BASE UNIT WEIGHTS (SEE NOTE 7)
LB (Kg)
060
48A2D/A3D/A6D/A7D 7066 (3205)
48A2E/A3E/A6E/A7E 7306 (3314)
48A4D/A5D/A8D/A9D 7106 (3223)
48A4E/A5E/A8E/A9E 7356 (3337)
50A2/A3/A6E/A7E 6826 (3096)
50A4/A5/A8E/A9E 7041 (3194)
OPTIONS / ACCESSORIES (SEE NOTE 7)
BAROMETRIC RELIEF 450 (204)
NON MOD. POWER EXHAUST 675 (306)
MOD. POWER EXHAUST 725 (329)
ELECTRIC HEAT 165 (75)
CU TU/AL FIN COND COIL 26 (12)
CU TU/CU FIN COND COIL 677 (307)
CV MOTOR WEIGHTS
LB (Kg)
VAV MOTOR WEIGHTS
LB (Kg) (SEE NOTE 8)
HIGH
EFFC'Y IFM
PREMIUM
EFFC'Y IFM
HIGH
EFFC'Y IFM
PREMIUM
EFFC'Y IFM
25 HP
(18.65 kW)
230/460 240 (109) 309 (140) 375 (170) 444 (201)
575 240 (109) 319 (145) 375 (170) 454 (206)
30 HP
(22.38 kW)
230/460 283 (128) 355 (161) 418 (190) 490 (222)
575 283 (128) 359 (163) 418 (190) 494 (224)
40 HP
(29.84 kW)
230/460 372 (169) 415 (188) 507 (230) 550 (249)
575 372 (169) 410 (186) 507 (230) 545 (247)
UNIT SIZE
OPERATING
WEIGHT
CENTER OF GRAVITY CORNER WEIGHT (kg)
AB
KG MM MM 1 2 3 4
48A2/A3/A6/A7 (D,M,S) 060 3804 4511 1049 866 768 1017 1153
48A2/A3/A6/A7 (E,N,T) 060 3913 4329 996 979 792 953 1189
48A4/A5/A7/A8 (D,M,S) 060 3822 4309 1149 800 940 1024 1058
48A4/A5/A7/A8 (E,N,T) 060 3936 4147 1097 907 964 968 1096
50A2/A3/A6/A7 060 3770 4698 1102 776 755 1104 1136
50A4/A5/A7/A8 060 3868 4484 1196 732 942 1127 1066
1
2
4
3
OFM#4OFM#2
OFM#3OFM#1
ECONOMIZER SIDE:
6'-0" [1829] (FOR TUBE CONDENSER COILS)
8'-0" [2438] (FOR REMOVAL OF MCHX CONDENSER COILS)

17
Table 1 — Physical Data — 48A Units
LEGEND * Sizes 020 to 027: Circuit 1 uses the lower portion of condenser coil,
Circuit 2 uses the upper portion.
Sizes 030 and 035: Circuit 1 uses the upper portion of condenser coil,
Circuit 2 uses the lower portion.
Sizes 040 and 050: Circuit 1 uses the left condenser coil, Circuit 2 the right.
Size 060: Circuit A uses the two MCHX coils near the bulkhead, Circuit B uses
the two MCHX coils near the control box.
†Rollout switch is manual reset.
UNIT 48A 020D/E 025D/E 027D/E 030D/E
NOMINAL CAPACITY (tons) 20 25 27 30
BASE UNIT See Unit Weights Table
OPERATING WEIGHT (lb)
COMPRESSOR
Quantity ... Type (Ckt 1/Ckt 2) 2 ... ZP67/1…ZP91 2 ... ZP91/1…ZP91 2 ... ZP91/1…ZP91 2…ZP72, 2…ZP72
Number of Refrigerant Circuits 2 2 2 2
Oil Precharged Precharged Precharged Precharged
REFRIGERANT R-410A
Operating Charge (lb), Ckt 1/Ckt 2
RTPF Coils 25.8/18.6 30.2/15.2 32.8/16.5 30.5/34.3
MCHX Coils 14.5/11.6 16.5/11.0 16.5/11.0 15.1/15.3
MCHX Coils with Humidi-MiZer® Coil 21.7/11.6 23.7/11.0 23.7/11.0 15.1/22.5
MCHX CONDENSER*
Quantity 1 1 1 1
Total Face Area (sq ft) 32.9 32.9 32.9 32.9
RTPF CONDENSER
Quantity 1 1 1 1
Rows...Fins/in. 2...15 3...15 3...15 4...15
Total Face Area (sq ft) 33.3 33.3 33.3 33.3
CONDENSER FAN Propeller Type
Nominal Cfm 19,500 19,500 19,500 19,500
Quantity... Diameter (in.) 2 ... 30 2 ... 30 2 ... 30 2 ... 30
Motor Hp 1 1 1 1
EVAPORATOR COIL Cross-Hatched Copper Tubes, Aluminum Plate Fins with Intertwined Circuits
Tube Size (in.) 3/83/83/83/8
Rows ... Fins/in. 3 ... 15 4 ... 14 4 ... 15 4 ... 15
Total Face Area (sq ft) 31.7 31.7 31.7 31.7
HUMIDI-MIZER COIL
Quantity 1 1 1 1
Face Area (sq ft) 14.4 14.4 14.4 14.4
EVAPORATOR FAN Centrifugal Type
Quantity ... Size (in.) 2 ... 20 X 15 2 ... 20 X 15 2 ... 20 X 15 2 ... 20 X 15
Type Drive Belt Belt Belt Belt
Nominal Cfm 8,000 10,000 11,000 12,000
Motor Hp 5 10 15 5 10 15 10 15 20 10 15 20
Motor Frame Size 184T 215T 254T 184T 215T 254T 215T 254T 256T 215T 254T 256T
Motor Bearing Type Ball Ball Ball Ball
Maximum Allowable Rpm 1200 1200 1200 1200
Motor Pulley Pitch Diameter 4.8 4.4 5.7 5.2 6.1 5.5 4.4 4.9 5.9 4.4 5.7 5.9
Nominal Motor Shaft Diameter (in.) 11/813/815/811/813/815/813/815/815/813/815/815/8
Fan Pulley Pitch Diameter (in.) 12.4 8.6 9.1 12.4 11.1 8.7 9.4 8.1 8.7 9.0 9.1 8.7
Nominal Fan Shaft Diameter (in.) 115/16 115/16 115/16 115/16
Belt Quantity 122112222222
Belt Type BX56 BX50 5VX530 BX56 5VX570 5VX530 BX50 5VX500 5VX530 BX50 5VX530 5VX530
Belt Length (in.) 56 63 53 56 57 53 50 50 53 50 53 53
Pulley Center Line Distance (in.) 16.0-18.7 15.6-18.4 15.0-17.9 15.6-18.4 15.6-
18.4
15.0-
17.9
15.6-
18.4 15.0-17.9 15.0-17.9 15.6-18.4 15.0-17.9 15.0-17.9
Factory Speed Setting (rpm) 717 924 1096 773 962 1106 848 1059 1187 856 1096 1187
FURNACE SECTION
Supply Line Pressure Range 5.0-in. wg min/13.5-in. wg max.
Rollout Switch Cutout
Temp (F)† 225 225 225 225
Burner Orifice Diameter (in. ...drill
size)
Natural Gas Std .111 ... 34 .111 ... 34 .111 ... 34 .111 ... 34
Liquid Propane Alt .089 ... 43 .089 ... 43 .089 ... 43 .089 ... 43
Thermostat Heat Anticipator Setting
Stage 1 (amps) 0.1 0.1 0.1 0.1
Stage 2 (amps) 0.1 0.1 0.1 0.1
Gas Input (Btuh) Stage 1
(Low Heat/High Heat) 262,500/394,000 262,500/394,000 262,500/394,000 262,500/394,000
Stage 2
(Low Heat/High Heat) 350,000/525,000 350,000/525,000 350,000/525,000 350,000/525,000
Efficiency (Steady State) (%) 81 81 81 81
Temperature Rise Range (F) 15-45/35-65 15-45/35-65 15-45/35-65 15-45/35-65
Manifold Pressure (in. wg)
Natural Gas Std 3.5 3.5 3.5 3.5
Liquid Propane Alt 3.5 3.5 3.5 3.5
Gas Valve Quantity 2 2 2 2
HIGH-PRESSURE SWITCH (psig)
Cutout 650 650 650 650
Reset (Auto.) 500 500 500 500
MIXED-AIR FILTERS
Quantity ... Size (in.) Standard 10 ... 20 x 24 x 2 10 ... 20 x 24 x 2 10 ... 20 x 24 x 2 10 ... 20 x 24 x 2
Pleated 5 ... 20 x 20 x 4
5 ... 20 x 24 x 4
5 ... 20 x 20 x 4
5 ... 20 x 24 x 4
5 ... 20 x 20 x 4
5 ... 20 x 24 x 4
5 ... 20 x 20 x 4
5 ... 20 x 24 x 4
OUTDOOR-AIR FILTERS
Quantity...Size (in.) 8...16 x 25 x 2
4...20 x 25 x 2
POWER EXHAUST Direct Drive, Single-Phase Motors (Factory-Wired for High Speed Operation), Forward-Curved Fan Wheels
with Backdraft Dampers on Each Fan Housing
Motor, Quantity...Hp 4...1
Fan, Diameter...Width (in.) 11 x 10
Al —Aluminum
Cu —Copper
MCHX—Microchannel Heat Exchanger
RTPF —Round Tube Plate Fin

18
Table 1 — Physical Data — 48A Units (cont)
LEGEND * Sizes 020 to 027: Circuit 1 uses the lower portion of condenser coil,
Circuit 2 uses the upper portion.
Sizes 030 and 035: Circuit 1 uses the upper portion of condenser coil,
Circuit 2 uses the lower portion.
Sizes 040 and 050: Circuit 1 uses the left condenser coil, Circuit 2 the right.
Size 060: Circuit A uses the two MCHX coils near the bulkhead, Circuit B uses
the two MCHX coils near the control box.
†Rollout switch is manual reset.
UNIT 48A 035D/E 040D/E 050D/E 060D/E
NOMINAL CAPACITY (tons) 35 40 50 60
BASE UNIT See Unit Weights Table
OPERATING WEIGHT (lb)
COMPRESSOR
Quantity ... Type (Ckt 1/Ckt 2) 2 ... ZP67/2...ZP104 2...ZP104/2...ZP104 2…ZP122/2…ZP122 2…ZP154/2…ZP154
Number of Refrigerant Circuits 2 2 2 2
Oil Precharged Precharged Precharged Precharged
REFRIGERANT R-410A
Operating Charge (lb), Ckt 1/Ckt 2
RTPF Coils 28.7/44.0 44.0/44.0 56.3/57.3 78.5/82.0
MCHX Coils 17.9/26.0 23.0/23.5 27.0/28.0 36.6/37.8
MCHX Coils with Humidi-MiZer® Coil 17.9/31.5 23.0/30.5 26.5/34.5 36.6/47.6
MCHX CONDENSER*
Quantity 1 2 2 4
Total Face Area (sq ft) 32.9 65.8 65.8 105.2
RTPF CONDENSER
Quantity 1 2 2 2
Rows...Fins/in. 4...15 3...15 4...15 6...30
Total Face Area (sq ft) 33.3 66.7 66.7 100.0
CONDENSER FAN Propeller Type
Nominal Cfm 19,500 32,000 35,000 40,000
Quantity... Diameter (in.) 2 ... 30 4 ... 30 4 ... 30 4...30.5(MCHX),
6...30(RTPF)
Motor Hp 1 1 1 1
EVAPORATOR COIL Cross-Hatched Copper Tubes, Aluminum Plate Fins with Intertwined Circuits
Tube Size (in.) 1/21/21/21/2
Rows ... Fins/in. 6 ... 16 4 ... 17 6 ... 16 4...17
Total Face Area (sq ft) 31.3 31.3 31.3 48.1
HUMIDI-MIZER COIL
Quantity 1 1 1 1
Face Area (sq ft) 14.4 14.4 14.4 14.1
EVAPORATOR FAN Centrifugal Type
Quantity ... Size (in.) 2 ... 20 X 15 2 ... 20 X 15 2 ... 20 X 15 3 ... 20 X 15
Type Drive Belt Belt Belt Belt
Nominal Cfm 14,000 16,000 18,000 24,000
Motor Hp 15 20 25 15 20 25 20 25 30 25 30 40
Motor Frame Size 254T 256T 284T 254T 256T 284T 256T 284T 286T 284T 286T 324T
Motor Bearing Type Ball Ball Ball Ball
Maximum Allowable Rpm 1300 1300 1300 1200
Motor Pulley Pitch Diameter (in.) 5.1 5.7 6.2 5.3 5.7 7.5 5.7 6.2 6.7 5.3 5.9 6.5
Nominal Motor Shaft Diameter (in.) 15/815/817/815/815/817/815/817/817/817/817/821/8
Fan Pulley Pitch Diameter (in.) 8.7 8.7 8.7 9.5 9.5 11.1 9.5 9.5 9.5 9.1 9.5 9.5
Nominal Fan Shaft Diameter (in.) 115/16 115/16 115/16 115/16
Belt Quantity 222222222333
Belt Type 5VX500 5VX530 5VX550 5VX530 5VX550 5VX590 5VX550 5VX570 5VX570 5VX530 5VX550 5VX570
Belt Length (in.) 50 53 55 53 55 59 55 57 57 53 55 57
Pulley Center Line Distance (in.) 15.0-
17.9
15.0-
17.9
15.0-
17.9
15.0-
17.9
15.0-
17.9
14.6-
17.6
15.0-
17.9
14.6-
17.6
14.6-
17.6
15.2-
17.5
14.7-
17.2
14.2-
17.0
Factory Speed Setting (rpm) 1025 1147 1247 976 1050 1182 1050 1142 1234 1019 1087 1197
FURNACE SECTION
Supply Line Pressure Range 5.0-in. wg min/13.5-in. wg max.
Rollout Switch Cutout
Temp (F)† 225 225 225 225
Burner Orifice Diameter (in ...drill size)
Natural Gas Std .111 ... 34 (low)/.120 ... 31
(high) .120 ... 31 .120 ... 31 .120...31
Liquid Propane Alt .089 ... 43 .096 ... 41 .096 ... 41 .096...41
Thermostat Heat Anticipator Setting
Stage 1 (amps) 0.1 0.24 0.1 0.1
Stage 2 (amps) 0.1 0.13 0.1 0.1
Gas Input (Btuh) Stage 1
(Low Heat/High Heat) 262,500/600,000 300,000/600,000 300,000/600,000 582,000/873,000
Stage 2
(Low Heat/High Heat) 350,000/800,000 400,000/800,000 400,000/800,000 776,000/1,164,000
Efficiency (Steady State) (%) 81 81 81 81
Temperature Rise Range (F) 15-45/30-60 10-40/30-60 10-40/30-60 10-40/30-60
Manifold Pressure (in. wg)
Natural Gas Std 3.5 3.5 3.5 3.3
Liquid Propane Alt 3.5 3.5 3.5 3.3
Gas Valve Quantity 2 2 2 3
HIGH-PRESSURE SWITCH (psig)
Cutout 650 650 650 650
Reset (Auto.) 500 500 500 500
MIXED-AIR FILTERS
Quantity ... Size (in.) Standard 10 ... 20 x 24 x 2 10 ... 20 x 24 x 2 10 ... 20 x 24 x 2 16...20 x 24 x 2
8...20 x 20 x 4
8...20 x 24 x 4
Pleated 5 ... 20 x 20 x 4
5 ... 20 x 24 x 4
5 ... 20 x 20 x 4
5 ... 20 x 24 x 4
5 ... 20 x 20 x 4
5 ... 20 x 24 x 4
OUTDOOR-AIR FILTERS
Quantity...Size (in.) 8...16 x 25 x 2
4...20 x 25 x 2
8...16 x 25 x 2
4...20 x 25 x 2
8...16 x 25 x 2
4...20 x 25 x 2
12...16 x 25 x 2
6...20 x 25 x 2
POWER EXHAUST Direct Drive, Single-Phase Motors (Factory-Wired for High Speed Operation), Forward-Curved Fan Wheels
with Backdraft Dampers on Each Fan Housing
Motor, Quantity...Hp 4...1
11 x 10
4...1
11 x 10
4...1
11 x 10
6...1
11 x 10Fan, Diameter...Width (in.)
Al —Aluminum
Cu —Copper
MCHX—Microchannel Heat Exchanger
RTPF —Round Tube Plate Fin

19
Table 2 — Unit Operating Weights* (lb)
Table 3 — Option and Accessory Weights (lb)
Table 4 — Constant Volume Fan
Motor Weights (lb)
Table 5 — Variable Air Volume / Staged Air Volume
Fan Motor Weights (lb)
LEGEND AND NOTES FOR TABLES 2-5
LEGEND * Outdoor-air hoods and filters included in base unit weights; indoor-
fan motors are NOT included.
NOTES:
1. Base unit weight includes OA hoods (economizer or outdoor air
damper); does not include an indoor-fan motor. ADD indoor motor,
FIOPs and accessories for TOTAL operating weight.
2. VAV/SAV™ motor weights include the indoor motor and the VFD,
optional VFD bypass, VFD transducer, and associated wiring.
UNIT SIZE 020 025 027 030 035 040 050 060
48A2D,A3D,A6D,A7D 3825 3961 3961 3992 4340 4770 4914 7066
48A2E,A3E,A6E,A7E 3905 4041 4041 4072 4500 4930 5074 7306
48A4D,A5D,A8D,A9D 3865 4001 4001 4032 4380 4810 4954 7106
48A4E,A5E,A8E,A9E 3945 4081 4081 4112 4540 4970 5114 7356
UNIT SIZE 020 025 027 030 035 040 050 060
OPTIONS/ACCESSORIES (WEIGHT ADDERS) (lb)
Barometric Relief 300 300 300 300 300 300 300 450
Non-Modulating Power Exhaust 450 450 450 450 450 450 450 675
Modulating Power Exhaust 500 500 500 500 500 500 500 725
Electric Heat 110 110 110 110 110 110 110 165
Cu Tube/Aluminum Fin Condenser Coil 100 100 100 150 150 187 317 26
Cu Tube/Cu Fin Condenser Coil 263 263 263 370 370 512 751 677
OA Hood Crate/Packaging
(Less Hoods’ Weight)
45 45 45 45 45 45 45 45
(Packaging Only)
Outdoor Air Hoods/Filters (included with unit) 170 170 170 170 170 170 170 255
Hail Guards 73 73 73 73 73 146 146 219
Roof Curb (14-in.) 365 365 365 365 365 410 410 540
Double Wall 275 275 275 275 275 275 275 375
Humidi-MiZer®Coil 150 150 150 150 150 180 180 195
MOTOR HP UNIT VOLTAGE
PREMIUM
EFFICIENCY
IFM
5 HP
230/460 80
380 75
575 80
10 HP
230/460 126
380 120
575 126
15 HP
230/460 217
380 155
575 217
20 HP
230/460 250
380 185
575 250
25 HP
230/460 309
380 225
575 309
30 HP
230/460 303
380 283
575 303
40 HP
230/460 551
380 601
575 551
MOTOR HP UNIT VOLTAGE
PREMIUM
EFFICIENCY
IFM
5 HP
230/460 138
380 133
575 149
10 HP
230/460 195
380 198
575 195
15 HP
230/460 316
380 254
575 319
20 HP
230/460 385
380 320
575 357
25 HP
230/460 444
380 360
575 454
30 HP
230/460 338
380 318
575 342
40 HP
230/460 686
380 736
575 686
Cu —Copper
FIOP —Factory-Installed Option
HP —Horsepower
IFM —Indoor-Fan Motor
OA —Outdoor Air
SAV —Staged Air Volume
VAV —Variable Air Volume
VFD —Variable Frequency Drive

20
Table 6 — Evaporator Fan Motor Data
NOTES:
1. Motor shaft speed is 1750 rpm. The fan shaft diameter is 115/16 inches.
2. All indoor fan motors meet the minimum efficiency requirements as established
by the Energy Policy Act of 1992 (EPACT), effective October 24, 1997.
3. Supply fan shaft bearings are pre-lubricated by the bearing manufacturer, or
again at the time of production. Check for a small bead around the bearing seal
and relubricate as necessary.
UNIT
SIZE
48A
MOTOR
HP
MOTOR
SHAFT DIA.
(in.)
FAN
SHAFT
SPEED
(RPM)
MOTOR
SHEAVE
(P/N)
MOTOR
SHEAVE
PITCH
DIAMETER
(in.)
BUSHING
DIAMETER
(in.)
FAN
SHEAVE
(P/N)
FAN
SHEAVE
PITCH
DIAMETER
(in.)
BUSHING
DIAMETER
(in.)
BELT
(QUANTITY)
(P/N)
BELT
TENSION
(lb at .25 in.)
020
5 1.125 717 BK55 4.8 NONE - 1.125 1B5V124 12.4 B - 1.9375 BX56 8
10 1.375 924 2BK50 4.4 NONE - 1.375 2B5V86 8.6 B - 1.9375 (2) BX50 8
15 1.625 1096 2B5V56 5.7 B - 1.625 2B5V90 9.1 B - 1.9375 (2) 5VX530 9
025
5 1.125 773 BK55 5.2 NONE - 1.125 1B5V124 12.4 B - 1.9375 BX56 8
10 1.375 962 1B5V60 6.1 H - 1.375 1B5V110 11.1 B - 1.9375 5VX570 11
15 1.625 1106 2B5V54 5.5 B - 1.625 2B5V86 8.7 B - 1.9375 (2) 5VX530 9
027
10 1.375 848 2BK50 4.4 NONE - 1.375 2B5V94 9.4 B - 1.9375 (2) BX50 8
15 1.625 1059 2B5V56 4.9 B - 1.625 2B5V90 8.1 B - 1.9375 (2) 5VX530 10
20 1.625 1187 2B5V58 5.9 B - 1.625 2B5V86 8.7 B - 1.9375 (2) 5VX530 11
030
10 1.375 856 2BK50 4.4 H - 1.375 2B5V94 9.0 B - 1.9375 (2) BX50 8
15 1.625 1096 2B5V56 5.7 B - 1.625 2B5V90 9.1 B - 1.9375 (2) 5VX530 9
20 1.625 1187 2B5V58 5.9 B - 1.625 2B5V86 8.7 B - 1.9375 (2) 5VX530 11
035
15 1.625 1025 2B5V50 5.1 B - 1.625 2B5V86 8.7 B - 1.9375 (2) 5VX500 9
20 1.625 1147 2B5V56 5.7 B - 1.625 2B5V86 8.7 B - 1.9375 (2) 5VX530 10
25 1.875 1247 2B5V62 6.2 B - 1.875 2B5V86 8.7 B - 1.9375 (2) 5VX530 11
040
15 1.625 976 2B5V52 5.3 B - 1.625 2B5V94 9.5 B - 1.9375 (2) 5VX530 10
20 1.625 1050 2B5V56 5.7 B - 1.625 2B5V94 9.5 B - 1.9375 (2) 5VX550 11
25 1.875 1182 2B5V74 7.5 B - 1.875 2B5V110 11.1 B - 1.9375 (2) 5VX590 11
050
20 1.625 1050 2B5V56 5.7 B - 1.625 2B5V94 9.5 B - 1.9375 (2) 5VX550 10
25 1.875 1142 2B5V62 6.2 B - 1.875 2B5V94 9.5 B - 1.9375 (2) 5VX570 11
30 1.875 1234 2B5V66 6.7 B - 1.875 2B5V94 9.5 B - 1.9375 (2) 5VX570 13
060
25 1.875 1019 3B5V52 5.3 B - 1.875 3B5V90 9.1 B - 1.9375 (3) 5VX530 12
30 1.875 1086 3B5V58 5.9 B - 1.875 3B5V94 9.5 B - 1.9375 (3) 5VX550 12
40 2.125 1197 3B5V64 6.5 B - 2.125 3B5V94 9.5 B - 1.9375 (3) 5VX570 14