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 and Troubleshooting literature.
A factory-installed optional integral economizer and high-
capacity power exhaust is available on size 075-100 units.
A factory-installed optional return fan is available on size
075-100 units.
The staged gas control (SGC) option adds the capability to
control the rooftop unit’s gas heating system to a specified
supply-air temperature set point for purposes of tempering a
cool mixed-air condition.
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.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480079-01Printed in U.S.A.Form 48P-4SIPg 111-10Replaces: 48P-3SI
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.
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.
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. File claim with 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.
Check unit dimensional drawings 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. Physical data is
shown in Tables 1A-9.
Step 3 — Roof Mount Unit — Check building codes
for weight distribution requirements. Unit weight is shown in
Tables 1A-1C and 5. 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. 1-5. 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. 1-5.
STEEL BEAMS — If roof curb is not used, support unit with
steel beams along its entire length and then support steel as required. As a minimum, unit must be supported across its width
at each lifting lug location.
Step 4 — Slab Mount Unit — Provide a level con-
crete slab that extends beyond unit cabinet at least 6 inches.
Make a slab 8 in. thick with 4 in. above grade. Use gravel
apron in front of condenser coil air inlet to prevent grass and
foliage from obstructing airflow. Ensure that slab is of
sufficient height to allow for condensate trap of 4 in. on sizes
030-070 or 7 in. on sizes 075-100.
Step 5 — Install Curb Gasketing
SIZE 030-060 UNITS — After ductwork has been connected
to the roof curb, attach adhesive-backed gasketing on all end
rails, cross rails, and duct rails. Be sure all joints and corners of
gasket are square and flush to prevent possible water leaks.
Follow all applicable building codes.
SIZE 070-100 UNITS — After ductwork has been connected
to the roof curb, apply gasket material (
wide neoprene) where indicated.
Single-Thickness Gasketing (See Fig. 6-8 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
Double-Thickness Gasketing (See Fig. 6 and 8 and Detail
A-A) — Locate a line 93/4-in. from the supply air end of the
accessory curb. Apply a double-thickness of gasket material
along line per detail A-A.
NOTE: Do not apply gasket material along the outside edge of
the curb (area “X”). This pan area of the curb extends out
beneath the end of the unit’s air handler section; applying gasket here develops a potential water trap area on top of the curb.
Condenser Section Roof Curb (See Fig. 7)
thickness gasket along both side rails (5).
1
/2-in. thick x 11/2-in.
— Apply single-
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.
The 48P2,P3 units are designed for vertical supply/return
only. Field-fabricated ductwork 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. 1-3.
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.
Step 7 — Rig Unit — Do not drop unit; keep upright.
Use spreader bars over 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. 9
and 10 for information. Unit and accessory weights are shown
in Tables 1A-1C and 5. Weight distribution and center of gravity can be found in Fig. 11.
Low Heat5310581054105910
High Heat5440594055406040
With Economizer
Low Heat5610611057106210
High Heat5740624058406340
COMPRESSORSScroll
Quantity...Type1...ZP154/1...ZP1541...ZP182/1...ZP182
Oil Charge (oz) per Compressor110110
Number of Refrigerant Circuits22
REFRIGERANTR-410A
Operating Charge (lb), Ckt 1/Ckt 2
Standard Evaporator Coil15.4/14.818.4/17.6
Standard Evaporator with Humidi-MiZer®15.4/24.918.4/27.7
Alternate High-Capacity Evaporator Coil18.4/17.7N/A
Alternate High-Capacity Evaporator with Humidi-MiZer18.4/27.8N/A
CONDENSER COILSAluminum Novation® Heat Exchanger with Microchannel Coils
Quantity11
Total Face Area (sq ft)33.333.3
EVAPORATOR COILS
Quantity1
Total Face Area (sq ft)32.1
Refrigerant Feed Device...No. per CircuitTXV...1
Standard Evaporator Coils
Rows...Fins/in.3...15.04...15.0
Fin TypeDouble WavyDouble Wavy
Tube TypeCross HatchedCross Hatched
Alternate, High-Capacity Evaporator Coils
Rows...Fins/in.4...15.0N/A
Fin TypeDouble WavyN/A
Tube TypeCross HatchedN/A
HEATING SECTIONLow HeatHigh HeatLow HeatHigh Heat
Number of Heat Exchangers714714
Input (MBtuh)325650325650
Output (MBtuh) (Vertical/Horizontal)263/260527/520263/260527/520
Temperature Rise Range (F)10-4025-5510-4025-55
Efficiency (%) (Vertical/Horizontal)81/8081/8081/8081/80
Burner Orifice Diameter
Manifold Pressure (in. wg)3.53.53.53.5
Line Pressure (in. wg) (min...max)5.0...13.05.0...13.05.0...13.05.0...13.0
Firing Stages2222
Number of Gas Valves1212
CONDENSER FANSPropeller Type
Quantity...Diameter (in.)2...302...30
Nominal Cfm18,00019,500
Motor Hp...Rpm1.0...11401.0...1140
SUPPLY FANCentrifugal 25 x 25 in.
Nominal Cfm
Maximum Allowable Cfm15,00015,000
Maximum Allowable Rpm900900
Shaft Diameter at Pulley (in.)111/
SUPPLY-FAN MOTOR AND DRIVE(Any motor available on any unit)
Motor Hp7.510152025
Motor Frame Size213T215T254T256T284T
Efficiency at Full Load (%)
High Efficiency88.589.591.091.091.7
Premium Efficiency91.7 91.793.0 93.6 93.6
Fan Pulley Pitch Diameter (in.)13.713.713.713.713.7
Motor Pulley Pitch Diameter (in.)3.44.34.95.56.5
Resulting Fan Speed (rpm)438549626703830
Belts Quantity...Type2...BX602...5VX630 2...5VX6302...5VX6302...5VX650
Center Distance Range (in.)17.74-14.3017.74-14.3017.63...14.0117.63...14.0116.63...12.87
OPTIONAL POWER EXHAUST†Centrifugal, 18 x 15 in. (Any motor available on any unit)
Quantity...Motor Hp2...3.02...5.02...7.52...10
Motor Frame SizeHigh Eff56HZ184T213T215T
Efficiency at Full Load (%) High/Premium81.0/88.587.5/89.588.5/91.789.5/91.7
Fan Pulley Pitch Diameter (in.)High Eff1110.41212
Motor Pulley Pitch Diameter Range (in.)High Eff4.1-3.14.7-3.76.0-4.87.0-5.8
Motor Pulley Pitch Diameter Factory Setup (in.)4.14.25.46.4
Blower Shaft Diameter at Pulley (in.)1
Fan Rpm Range500-656621-785717-882854-1000
Factory Setup Fan Rpm656703800927
Maximum Allowable Rpm1000100010001000
FILTERS
Standard Efficiency Throwaway (Standard)
Quantity...Size (in.)8...20 x 25 x 2, 8...20 x 20 x 28...20 x 25 x 2, 8...20 x 20 x 2
Medium Efficiency (30%) Pleated (Optional)
Quantity...Size (in.)8...20 x 25 x 2, 8...20 x 20 x 28...20 x 25 x 2, 8...20 x 20 x 2
High Efficiency (90%) Bag Filters
with High Velocity Prefilters (Opt)
Quantity...Size (in.)
Bag Filter6...20 x 24 x 22, 6...20 x 20 x 226...20 x 24 x 22, 6...20 x 20 x 22
Prefilter12...16 x 20 x 2, 3...20 x 24 x 212...16 x 20 x 2, 3...20 x 24 x 2
MERV 15 Cartridge Filters with High Velocity Prefilters (Opt)
Quantity...Size (in.)
Cartridge Filter6...20 x 24 x 12, 6...20 x 20 x 126...20 x 24 x 12, 6...20 x 20 x 12
Prefilter12...16 x 20 x 2, 3...20 x 24 x 212...16 x 20 x 2, 3...20 x 24 x 2
Low Heat5810631060256525
High Heat5940644061556655
With Economizer
Low Heat6110661063256825
High Heat6240674064556955
COMPRESSORSScroll
Quantity...Type2...ZP103/1...ZP1822...ZP120/2...ZP137
Oil Charge (oz) per Compressor110110
Number of Refrigerant Circuits22
REFRIGERANTR-410A
Operating Charge (lb), Ckt 1/Ckt 2
Standard Evaporator Coil21.6/26.729.4/29.0
Standard Evaporator with Humidi-MiZer®21.6/39.129.4/41.4
Alternate High-Capacity Evaporator Coil35.1/37.238.2/36.5
Alternate High-Capacity Evaporator with Humidi-MiZer31.1/49.638.2/48.9
CONDENSER COILSAluminum Novation® Heat Exchanger with Microchannel Coils
Quantity22
Total Face Area (sq ft)66.766.7
EVAPORATOR COILS
Quantity1
Total Face Area (sq ft)45.5
Refrigerant Feed Device...No. per CircuitTXV...2
Standard Evaporator Coils
Rows...Fins/in.3...15.04...15.0
Fin TypeDouble WavyDouble Wavy
Tube TypeCross HatchedCross Hatched
Alternate, High-Capacity Evaporator Coils
Rows...Fins/in.6...16.06...16.0
Fin TypeDouble WavyDouble Wavy
Tube TypeCross HatchedCross Hatched
HEATING SECTIONLow HeatHigh HeatLow HeatHigh Heat
Number of Heat Exchangers714714
Input (MBtuh)325650325650
Output (MBtuh) (Vertical/Horizontal)263/260527/520263/260527/520
Temperature Rise Range (F)10-4025-5510-4025-55
Efficiency (%) (Vertical/Horizontal)81/8081/8081/8081/80
Burner Orifice Diameter
Manifold Pressure (in. wg)3.53.53.53.5
Line Pressure (in. wg) (min...max)5.0...13.05.0...13.05.0...13.05.0...13.0
Firing Stages2222
Number of Gas Valves1212
CONDENSER FANSPropeller Type
Quantity...Diameter (in.)3...304...30
Nominal Cfm30,00038,000
Motor Hp...Rpm1.0...11401.0...1140
SUPPLY FANCentrifugal 25 x 25 in.
Nominal Cfm14,00014,000
Maximum Allowable Cfm20,00020,000
Maximum Allowable Rpm900900
Shaft Diameter at Pulley (in.)111/
SUPPLY-FAN MOTOR AND DRIVE(Any motor available on any unit)
Motor Hp7.51015202530*
Motor Frame Size213T215T254T256T284T 286T
Efficiency at Full Load (%)
High Efficiency 88.589.591.091.091.792.4
Premium Efficiency91.7 91.7 93.0 93.6 93.693.6
Fan Pulley Pitch Diameter (in.)13.713.713.713.713.712.5
Motor Pulley Pitch Diameter (in.)3.44.34.95.56.56.5
Resulting Fan Speed (rpm)438 549 626 703 830 910
Belts Quantity...Type2...BX602...5VX630 2...5VX6302...5VX6302...5VX6503...5VX630
Center Distance Range (in.)17.74-14.3017.74-14.3017.63...14.0117.63...14.0116.63...12.8716.63...12.87
OPTIONAL POWER EXHAUST†Centrifugal, 18 x 15 in. (Any motor available on any unit)
Quantity...Motor Hp2...3.02...5.02...7.52...10
Motor Frame SizeHigh Eff56HZ184T213T215T
Efficiency at Full Load (%) High/Premium81.0/88.587.5/89.588.5/91.789.5/91.7
Fan Pulley Pitch Diameter (in.)High Eff1110.41212
Motor Pulley Pitch Diameter Range (in.)High Eff4.1-3.14.7-3.76.0-4.87.0-5.8
Motor Pulley Pitch Diameter Factory Setup (in.)4.14.25.46.4
Blower Shaft Diameter at Pulley (in.)17/
Fan Rpm Range500-656621-785717-882854-1000
Factory Setup Fan Rpm656703800927
Maximum Allowable Rpm1000100010001000
FILTERS
Standard Efficiency Throwaway (Standard)
Quantity...Size (in.)8...20 x 25 x 2, 8...20 x 20 x 28...20 x 25 x 2, 8...20 x 20 x 2
Medium Efficiency (30%) Pleated (Optional)
Quantity...Size (in.)8...20 x 25 x 2, 8...20 x 20 x 28...20 x 25 x 2, 8...20 x 20 x 2
High Efficiency (90%) Bag Filters
with High Velocity Prefilters (Opt)
Quantity...Size (in.)
Bag Filter6...20 x 24 x 22, 6...20 x 20 x 226...20 x 24 x 22, 6...20 x 20 x 22
Prefilter12...16 x 20 x 2, 3...20 x 24 x 212...16 x 20 x 2, 3...20 x 24 x 2
MERV 15 Cartridge Filters with High Velocity Prefilters (Opt)
Quantity...Size (in.)
Cartridge Filter6...20 x 24 x 12, 6...20 x 20 x 126...20 x 24 x 12, 6...20 x 20 x 12
Prefilter12...16 x 20 x 2, 3...20 x 24 x 212...16 x 20 x 2, 3...20 x 24 x 2
Low Heat7810836078658 41582058755
High Heat794084907995854583358885
With Economizer
Low Heat8340889083958 94587359285
High Heat847090208525907588659415
COMPRESSORSScroll
Quantity...Type2...ZP137/2...ZP1372...ZP154/2...ZP1541...ZP54,1...ZP182/1...ZP54,1...ZP182
Oil Charge (oz) per Compressor110110110
Number of Refrigerant Circuits22 2
REFRIGERANTR-410A
Operating Charge (lb), Ckt 1/Ckt 2
Standard Evaporator Coil37.6/37.942.2/41.843.5/44.8
Standard Evaporator with Humidi-MiZer®37.6/50.342.2/54.243.5/57.2
Alternate High-Capacity Evaporator Coil46.5/45.847.6/46.555.4/55.5
Alternate High-Capacity Evaporator with
Humidi-MiZer
CONDENSER COILSAluminum Novation® Heat Exchanger with Microchannel Coils
Quantity22 4
Total Face Area (sq ft)66.766.7106.7
EVAPORATOR COILS
Quantity2
Total Face Area (sq ft)61.5
Refrigerant Feed Device...No. per CircuitTXV...2
Standard Evaporator Coils
Number of Heat Exchangers142114211421
Input (MBtuh)650975650975650975
Output (MBtuh) (Vertical/Horizontal)527/520790/780527/520790/780527/520790/780
Temperature Rise Range (F)10-4020-5010-4020-5010-4020-50
Efficiency (%) (Vertical/Horizontal)81/8081/8081/8081/8081/8081/80
Burner Orifice Diameter
Manifold Pressure (in. wg)3.53.53.53.53.53.5
Line Pressure (in. wg) (min...max)5.0...13.05.0...13.05.0...13.05.0...13.05.0...13.05.0...13.0
Firing Stages22222 2
Number of Gas Valves23232 3
CONDENSER FANSPropeller Type
Quantity...Diameter (in.)4...304...304...30
Nominal Cfm36,00036,60039,000
Motor Hp...Rpm1.0...11401.0...11401.0...1140
SUPPLY FANCentrifugal 30 x 27.5 in.
Nominal Cfm17,50021,00024,500
Maximum Allowable Cfm25,00030,00030,000
Maximum Allowable Rpm800800800
Shaft Diameter at Pulley (in.)111/
SUPPLY-FAN MOTOR AND DRIVE(Any motor available on any unit)
Motor Hp1520253040†
Motor Frame Size254T256T284T286TS324T
Efficiency at Full Load (%)
High Efficiency91.091.091.792.493.0
Premium Efficiency93.093.693.693.694.5
Fan Pulley Pitch Diameter (in.)13.713.713.715.516.1
Motor Pulley Pitch Diameter (in.)4.55.15.55.96.7
Resulting Fan Speed (rpm)575651703711740
Belts Quantity...Type2...5VX12302...5VX12302...5VX12302...5VX12303...5VX1250
Center Distance Range (in.)48.25-44.0048.25-44.0048.50-44.2548.50-44.2548.25-44.00
OPTIONAL POWER EXHAUST*Centrifugal, 18 x 15 in. (Any motor available on any unit)
Quantity...Motor Hp2...52...7.52...10
Motor Frame Size184T213T215T
Efficiency at Full Load (%) High/Premium87.5/89.588.5/91.789.5/91.7
Resulting Fan Rpm 740820920
Maximum Allowable Rpm100010001000
FILTERS
Standard Efficiency Throwaway (Standard)
Quantity...Size (in.)12...20 x 25 x 2, 12...20 x 20 x 212...20 x 25 x 2, 12...20 x 20 x 212...20 x 25 x 2, 12...20 x 20 x 2
Medium Efficiency (30%) Pleated (Optional)
Quantity...Size (in.)12...20 x 25 x 2, 12...20 x 20 x 212...20 x 25 x 2, 12...20 x 20 x 212...20 x 25 x 2, 12...20 x 20 x 2
High Efficiency (90%) Bag Filters
with High Velocity Prefilters (Optional)
Quantity...Size (in.)
Bag Filter6...24 x 24 x 22, 6...24 x 20 x 226...24 x 24 x 22, 6...24 x 20 x 226...24 x 24 x 22, 6...24 x 20 x 22
Prefilter6...24 x 24 x 2, 6...20 x 24 x 26...24 x 24 x 2, 6...20 x 24 x 26...24 x 24 x 2, 6...20 x 24 x 2
MERV 15 Cartridge Filters with
High Velocity Prefilters (Optional)
Quantity...Size (in.)
Cartridge Filter6...24 x 24 x 12,, 6...24 x 20 x 126...24 x 24 x 12,, 6...24 x 20 x 126...24 x 24 x 12, 6...24 x 20 x 12
Prefilter6...24 x 24 x 2, 6...20 x 24 x 26...24 x 24 x 2, 6...20 x 24 x 26...24 x 24 x 2, 6...20 x 24 x 2
OUTSIDE AIR SCREENS
Standard Hood (25%) Quantity...Size (in.)4...25 x 16 x 1, 2...20 x 16 x 14...25 x 16 x 1, 2...20 x 16 x 14...25 x 16 x 1, 2...20 x 16 x 1
OPTIONAL ECONOMIZER FILTERAluminum Frame, Permanent
Quantity...Size (in.)12...16 x 25 x 1, 2...16 x 20 x 112...16 x 25 x 1, 2...16 x 20 x 112...16 x 25 x 1, 2...16 x 20 x 1
LEGEND*See Table 7 — Power Exhaust Fan Drive Data on page 9 for more information.
MBtuh — Btuh in Thousands
TXV— Thermostatic Expansion Valve
46.5/58.247.6/58.955.4/67.9
16
111/
16
111/
16
5
Table 1C — Physical Data 48P2,P3,P4,P5075-100
BASE UNIT48P2,P3,P4,P507548P2,P3,P4,P509048P2,P3,P4,P5100
NOMINAL CAPACITY (tons)7590100
OPERATING WEIGHT (lb)Standard
Base Unit
Low Heat90659615966510,215968510,235
High Heat91959745979510,345981510,365
With Economizer
Low Heat959510,14510,19510,74510,21510,765
High Heat972510,27510,32510,87510,34510,895
COMPRESSORSScroll
Quantity...Type2...ZP82/2...ZP1823...ZP154,3...ZP1543...ZP154,3...ZP182
Oil Charge (oz) per Compressor110110110
Number of Refrigerant Circuits222
REFRIGERANTR-410A
Operating Charge (lb), Ckt 1/Ckt 2
Standard Evaporator Coil43.8/45.050.4/51.350.8/52.8
Standard Evaporator with Humidi-MiZer®43.8/57.450.4/69.150.8/70.6
Alternate High-Capacity Evaporator Coil55.1/54.961.5/62.959.3/62.8
Alternate High-Capacity Evaporator with
Humidi-MiZer
CONDENSER COILSAluminum Novation® Heat Exchanger with Microchannel Coils
Quantity466
Total Face Area (sq ft)106.7160.0160.0
EVAPORATOR COILS
Quantity2
Total Face Area (sq ft)61.5
Refrigerant Feed Device...No. per CircuitTXV...2
Standard Evaporator Coils
Rows...Fins/in.4...154...154...15
Fin TypeDouble WavyDouble WavyDouble Wavy
Tub e Ty p eCross HatchedCross HatchedCross Hatched
Alternate, High-Capacity Evaporator Coils
Rows...Fins/in.6...166...166...16
Fin TypeDouble WavyDouble WavyDouble Wavy
Tub e Ty p eCross HatchedCross HatchedCross Hatched
Number of Heat Exchangers232323
Input (MBtuh)650975650975650975
Output (MBtuh) (Vertical/Horizontal)527/520790/780527/520790/780527/520790/780
Temperature Rise Range (F)10-4020-5010-4020-5010-4020-50
Efficiency (%) (Vertical/Horizontal)81/8081/8081/8081/8081/8081/80
Burner Orifice Diameter
Manifold Pressure (in. wg)3.53.53.53.53.53.5
Line Pressure (in. wg) (Min...Max)5.0...13.05.0...13.05.0...13.05.0...13.05.0...13.05.0...13.0
Number of Gas Valves232323
CONDENSER FANPropeller Type
Quantity...Diameter (in.)4...306...306...30
Nominal Cfm39,00058,00058,000
Motor Hp (ea)...rpm1.0...11401.0...11401.0...1140
STANDARD SUPPLY FANForward Curved Centrifugal 36 x 30 in.
Nominal Cfm24,50029,75035,000
Maximum Allowable Cfm30,00034,00040,000
Maximum Allowable Rpm680680680
Shaft Diameter at Pulley (in.)1
STANDARD SUPPLY-FAN MOTOR AND DRIVE(Any motor available on any unit)
Motor Hp30405060
Motor Frame SizeS268TS324TS36TS364T
Efficiency at Full Load (%)
High Efficiency92.493.093.093.6
Premium Efficiency93.694.594.595.4
Fan Pulley Pitch Diameter (in.)18.518.518.518.5
Motor Pulley Pitch Diameter (in.)5.35.76.57.1
Resulting Fan Rpm501539615672
Belts Quantity...Type3...5VX13204...5VX13204...5VX13204...5VX1320
Center Distance Range (in.)47.88-45.0147.64-44.7647.42-44.5247.42-44.52
ALTERNATE, AIRFOIL FANAirfoil
Nominal Airflow (cfm)24,50029,75035,000
Maximum Allowable Airflow (cfm)30,00034,00040,000
Maximum Allowable Wheel Speed (rpm)184618461846
Shaft Diameter at Pulley (in.)2
ALTERNATE SUPPLY-FAN MOTOR AND DRIVE(Any motor available on any unit)
Motor Hp3040506075
Motor Frame SizeS268TS324TS36TS364T365T
Efficiency at Full Load (%)
High Efficiency92.493.093.093.694.1
Premium Efficiency93.694.594.595.495.4
Fan Pulley Pitch Diameter (in.)9.710.28.98.910.8
Motor Pulley Pitch Diameter (in.)7.58.78.18.711.1
Resulting Fan Rpm13531493159317111799
Belts Quantity...Type2...5VX11502...5VX11803...5VX11503...5VX11503...5VX1230
Center Distance Range (in.)42.96...45.8242.96...45.5742.96...45.5742.45...45.3542.45...45.35
Chassis
LEGEND*See Table 3 — High-Capacity Power Exhaust Data for more information. See
MBtuh — Btuh in Thousands
TXV— Thermostatic Expansion Valve
Extended
Chassis
Standard
Chassis
Extended
Chassis
Standard
Chassis
55.1/67.361.5/80.759.3/80.6
11
/
16
11
/
16
111/
211/
16
16
111/
211/
16
16
Table 7 — Power Exhaust Fan Drive Data on page 9 for more information.
Extended
Chassis
6
Table 1C — Physical Data 48P2,P3,P4,P5075-100 (cont)
BASE UNIT48P2,P3,P4,P507548P2,P3,P4,P509048P2,P3,P4,P5100
OPTIONAL POWER EXHAUST*Centrifugal, 18 x 15 in. (Any motor available on any unit.)
Quantity...Motor Hp2...52...7.52...10
Motor Frame Size184T213T215T
Efficiency at Full Load (%)
High Efficiency87.588.589.5
Premium Efficiency89.591.791.7
Fan Pulley Pitch Diameter (in.)10.610.610.6
Motor Pulley Pitch Diameter (in.)4.55.05.6
Shaft Diameter at Pulley (in.)1
Resulting Fan Rpm740820920
Maximum Allowable Rpm100010001000
FILTERS
Standard Efficiency Throwaway
(Standard)
Quantity...Size (in.)12...20 x 25 x 2, 12...20 x 20 x 212...20 x 25 x 2, 12...20 x 20 x 212...20 x 25 x 2, 12...20 x 20 x 2
30% and 65% Pleated (Optional)
Quantity...Size (in.)12...20 x 25 x 2, 12...20 x 20 x 212...20 x 25 x 2, 12...20 x 20 x 212...20 x 25 x 2, 12...20 x 20 x 2
OUTSIDE AIR SCREENS
Standard Hood (25%) Quantity...Size (in.)4...25 x 16 x 1, 2...20 x 16 x 14...25 x 16 x 1, 2...20 x 16 x 14...25 x 16 x 1, 2...20 x 16 x 1
Quantity...Size (in.)12...16 x 25 x 1, 2...16 x 20 x 112...16 x 25 x 1, 2...16 x 20 x 112...16 x 25 x 1, 2...16 x 20 x 1
LEGEND*See Table 3 — High-Capacity Power Exhaust Data for more information. See
MBtuh — Btuh in Thousands
TXV— Thermostatic Expansion Valve
7
/
16
17/
16
17/
16
Table 7 — Power Exhaust Fan Drive Data on page 9 for more information.
Table 2 — Optional Return Fan Physical Data (48P075-100 Only)
BASE UNIT48P2,P3,P4,P5075-100
RETURN FANPlenum Fan, 47.13 in. (Any motor available on any unit.)
Quantity...Motor Hp1...201...251...30 1...40
Motor Frame Size256T284T286T 324T
Efficiency at Full Load (%) High/Premium91.0/93.691.7/93.692.4/93.6 93.0/93.8
Fan Pulley Pitch Diameter (in.)8.59.88.5 8.5
Motor Pulley Pitch Diameter (in.)5.36.76.1 6.7
Shaft Diameter at Pulley (in.)2
Resulting Fan Rpm110412091271 1396
Maximum Allowable Rpm144714471447 1447
15
/
16
215/
16
215/
16
215/
16
Table 3 — Optional High-Capacity Power Exhaust Physical Data (48P075-100 Only)
BASE UNIT48P2,P3,P4,P5075-100
POWER EXHAUSTCentrifugal, 22 x 20 in., 1
Tot a l Hp2030405060
Quantity...Motor Hp2...102...152...202...252...30
Motor Frame SizeS215TD254TS256TS284TS286T
Efficiency at Full Load (%)
High Efficiency89.5919191.792.4
Premium Efficiency91.793 93.693.693.6
Fan Sheave Pitch Diameter (in.)12.412.411.111.111.1
Motor Sheave Pitch Diameter (in.)4.85.85.9 6.56.9
Resulting Fan Rpm71484192810201094
Maximum Allowable Rpm11751175117511751175
Belts — Quantity...Type2...BX932...BX932...5VX9502...5VX9502...5VX950
Table 4 — Optional Humidi-MiZer
UNIT SIZE 48/50P030-075090,100
Humidi-MiZer Coil ConstructionAluminum Novation
Quantity11
Face Area (sq ft)26.733.3
11
/16 in. shaft diameter (Any motor available on any unit)
®
Coil Data
®
Coil
7
Table 5 — Operating Weights of Options and Accessories (lb)
Standard Length455495605605605605605605
Extended Length54554512001200————
With High-Capacity Power Exhaust—— ———700700700
High-Efficiency Filters2020202020202020
Bag Filters and Cartridge Filters3535404040———
Hail Guard120150145145210210210210
Inlet Guide Vanes9595115115115115115115
Variable Frequency Drive
7.5 hp
10 hp
15 hp
20 hp
25 hp
30 hp
40 hp
50 hp
60 hp
75 hp
High-Capacity Evaporator Coil
Airfoil Fan — ————350350350
Humidi-MiZer® Adaptive Dehumidification System 72 72 72 72 72 72 92 92
030,035040,050055060070075090100
20
20
35
35
53
—
—
—
—
—
150 300300300300300300300
20
20
35
35
53
—
—
—
—
—
—
—
35
35
53
53
53
—
—
—
48/50P UNIT SIZE
—
—
35
35
53
53
53
—
—
—
—
—
35
35
53
53
53
—
—
—
—
—
—
—
—
53
53
53
53
152
—
—
—
—
—
53
53
53
53
152
—
—
—
—
—
53
53
53
53
152
*Includes hood.
Table 6 — Supply Fan Drive Data
HP
SHAFT
DIA (in.)
Sizes 030-050
7.51
101
151
201
251
30*1
3
/
8
3
/
8
5
/
8
5
/
8
7
/
8
7
/
8
Sizes 055-070
151
201
251
301
402
5
/
8
5
/
8
7
/
8
7
/
8
1
/
8
Sizes 075-100 (Forward-Curved Fan)
301
402
502
602
7
/
8
1
/
8
1
/
8
3
/
8
Sizes 075-100 (Airfoil Fan)
301
402
502
602
752
7
/
8
1
/
8
1
/
8
3
/
8
3
/
8
*Sizes 040,050 only.NOTE: Part numbers are Browning Manufacturing Corp. reference.
NOTE: Part numbers are Browning Manufacturing Corp. reference.
Table 8 — Optional High-Capacity Power Exhaust Fan Drive Data
TOTALHPMOTOR
QTY...HP
MOTOR
SHAFT
DIA. (in.)
SPEED
RPM
202...101.3757142B5V484.82B5V12412.42...BX9332.8 to 36.7
302...151.6258412B5V585.82B5V12412.42...BX9332.6 to 36.5
402...201.6259282B5V585.92B5V11011.12...5VX95032.6 to 36.5
502...251.87510202B5V646.52B5V11011.12...5VX95032.5 to 36.3
602...301.87510942B5V686.92B5V11011.12...5VX95032.5 to 36.3
MOTOR SHEAVEBLOWER SHEAVE
Part
Number
Pitch Diameter
(in.)
Part
Number
Pitch Diameter
(in.)
QTY...BELT
CENTER DISTANCE
RANGE (in.)
CENTER
DISTANCE
RANGE (in.)
Table 9 — Optional Return Fan Drive Data
TOTALHPMOTOR
QTY...HP
MOTOR
SHAFT
DIA. (in.)
SPEED
RPM
201...201.62511043B5V525.33R5V858.53...5VX100038.1 to 41.0
251...251.87512093B5V666.73R5V979.83...5VX106038.9 to 41.8
301...301.87512713B5V606.13R5V858.53...5VX103038.9 to 41.8
401...402.12513963B5V666.73R5V858.53...5VX106039.9 to 42.8
Fig. 8 — Gasket Location on Roof Curb (48P075-100 Units with Optional High-Capacity Power Exhaust)
are a total of five drain connections required on each unit: one
primary drain (on right-hand side of the unit) and four secondary drains (two on each side of unit).
PRIMARY DRAIN — The primary 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. 12-21. Fig. 22 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 4-in. for size 030-070 units
and 7-in. for size 075-100 units. See Fig. 23 and 24. Install with
a height dimension of at least 2-in. from the top of the exit pipe
from the trap section to the bottom of the connector. Apply a
bead of RTV or similar sealant around the pipe joint at the connector in the base rail.
SECONDARY DRAINS (Units Installed on
Curb) — There are two secondary drain connections on each
side of the unit. See Fig. 25. There are secondary drains on
each side of the unit in the filter section and on each side of the
unit in the supply fan section. There are labels marking each location on the unit base rail. See Fig. 12-21.
Locate the four 1
mounting screws (shipped in a bag taped to the basepan in the
supply fan section, located behind the access panel marked
FAN SECTION). The drain couplings are a 10-gage plate with
1
a 1
/4 in. half coupling welded to the plate.
At each secondary drain hole location, there is a 1
hole pre-drilled in the bottom of the base rail, surrounded by
1
/4-in. drain coupling assemblies and
3
/8-in.
four 0.20-in. engagement holes. Install a drain coupling assembly using screws provided at each secondary drain hole location. See Fig. 26. Do not attach any drain coupling assemblies
in the condenser section base rail.
Using field-supplied fittings and pipe sections, assemble Utraps at each secondary drain fitting. See Fig. 27. Provide a
minimum size of ½-in. pipe for secondary drains. Use a trap at
least 4-in. deep for size 030-070 units and 7-in. deep for size
075-100 units. Apply a bead of RTV or similar sealant around
the drain assemblies.
Consult local plumbing codes for direction on joining multiple drain lines. Total size of any combined line does not need
to exceed nominal 2-in. size of primary drain connection.
Fill the U-traps at the secondary drain locations prior to unit
start-up. Also check the U-traps before each cooling season to
ensure the traps are filled and functioning properly.
SECONDARY DRAINS (Units Installed on Steel Beam or
Slab) — There are two secondary drain connections required
on each side of the unit. There are secondary drains on the bottom of the base rail on each side of the unit in the filter section
and on each side of the unit in the supply fan section. There are
labels marking each location on the unit base rail. See Fig. 12-
21. Drain holes will need to be drilled in these locations at the
side of the base rail. The existing secondary drain holes in the
bottom of the base rail must be sealed. Prior to final positioning
of the unit, apply a bead of RTV or similar sealant around each
secondary drain hole in the bottom of the unit base rail. See
Fig. 27. Install the metal seal plates then position the unit into
final location.
16
48ZZ501077 2.0
NOTE: Rig with four cables and spread with two 95 inch (2413 MM) spreader bars.
1. Weights do not include economizer or
power exhaust.
Fig. 9 — Rigging Label — Units without Optional Return Fan or High-Capacity Power Exhaust
a48-8455
17
48ZZ501078 2.0
NOTE: Rig with four cables and spread with two 95 inch (2413 MM) spreader bars.
ALL PANELS MUST BE IN PLACE WHEN RIGGING.
CAUTION - NOTICE TO RIGGERS:
MMNIMMNIMMNISGKSBL543,2,1
50P 2,3,4,5-,B,C50 P2, P3, P4, P5
075 119215407220.1559040.21021255.76495
Vert Supply/Return w/ RE Fan
090 125215679228.4580041.51054255.76495
Horz Supply Vert Return w/ RE Fan
100 125415689227.8578641.51054255.76495
48P 2,3,4,5B,D,H48 P2, P3, P4, P5 Low Gas Heat
075 123215589224.6570640.21021255.76495
Vert Supply/Return w/ RE Fan
090 129215861232.6590841.51054255.76495
Horz Supply Vert Return w/ RE Fan
100 129415870230.4585341.51054255.76495
48P 2,3,4,5C,E,J48 P2, P3, P4, P5 High Gas Heat
075 124515648226.9576440.21021255.76495
Vert Supply/Return w/ RE Fan
090 130515920233.7593641.51054255.76495
Horz Supply Vert Return w/ RE Fan
100 130715929232.9591541.51054255.76495
50P 2,3,4,5 R,T,V,W50 P2, P3, P4, P5
075 12471 5657231.7588540.21021 280.87132
Vert Sup/Ret, Horz Sup/ Vert Ret
090 13071 5929240.1609841.51054 280.87132
w/ RE Fan, w/ Ext Chassis
100 13091 5938239.2607541.51054 280.87132
48P 2,3,4,5P,R,W48 P2, P3, P4, P5 Low Gas Heat
075 12871 5838236.2600040.21021 280.87132
Vert Sup/Ret, Horz Sup/ Vert Ret
090 13471 6110244.3620541.51054 280.87132
w/ RE Fan, w/ Ext Chassis
100 13491 6119241.8614241.51054 280.87132
48P 2,3,4,5Q,S,X48 P2, P3, P4, P5 High Gas Heat
075 13001 5897238.5605840.21021 280.87132
Vert Sup/Ret, Horz Sup/ Vert Ret
090 13601 6169245.4623441.51054 280.87132
w/ RE Fan, w/ Ext Chassis
100 13621 6178244.2620341.51054 280.87132
48P 2,3,4,5B,D,H48 P2, P3, P4, P5 Low Gas Heat
075 13499 6123290.1736740.21021 312.17927
Vert Sup/Ret, Horz Sup/Ret
090 14097 6394297.7756141.51054 312.17927
w/ Hi Cap PE
100 14119 6404297.1754641.51054 312.17927
48P 2,3,4,5C,E,J48 P2, P3, P4, P5 High Gas Heat
075 13629 6182291.3740040.21021 312.17927
Vert Sup/Ret, Horz Sup/Ret
090 14227 6453298.9759341.51054 312.17927
w/ Hi Cap PE
100 14249 6463298.2757541.51054 312.17927
50P 2,3,4,5-,B,C50 P2, P3, P4, P5
075 13099 5942287.1729340.21021 312.17927
Vert Sup/Ret, Horz Sup/Ret
090 13697 6213295.1749641.51054 312.17927
w/ Hi Cap PE
100 13719 6223294.4747841.51054 312.17927
48P 2,3,4,5 R,T,V,W48 P2, P3, P4, P5 Low Gas Heat
075 14049 6373483.5 1228040.21021337.38567
Vert Sup/Ret, Horz Sup/Ret
090 14647 6644484.3 1230241.51054337.38567
w/ Hi Cap PE w/ Ext Chassis
100 14669 6654493.8 1254241.51054337.38567
48P 2,3,4,5P,R,W48 P2, P3, P4, P5 High Gas Heat
075 14179 6432483.5 1228040.21021337.38567
Vert Sup/Ret, Horz Sup/Ret
090 14777 6703484.3 1230141.51054337.38567
w/ Hi Cap PE w/ Ext Chassis
100 14799 6713493.8 1254241.51054337.38567
50P 2,3,4,5Q,S,X50 P2, P3, P4, P5
075 13649 6191483.5 1228140.21021337.38567
Vert Sup/Ret, Horz Sup/Ret
090 14247 6462484.4 1230441.51054337.38567
w/ Hi Cap PE w/ Ext Chassis
100 14269 6472493.8 1254341.51054337.38567
MODEL POSITION
UNITS
SIZE
C
CENTER OF GRAVITY
LIFTING LUGS
WEIGHTAB
Fig. 10 — Rigging Label — Units with Optional Return Fan or High-Capacity Power Exhaust
a48-8456
18
3
2
A
B
4
1
NOTE: The weight distribution and center of gravity information include the impact of an economizer, the largest indoor fan motor, and a VFD (variable frequency
drive). On units with a return fan or high-capacity power exhaust, the largest motors and VFD are also included. These weights do not include the impact of other
factory-installed options such as barometric relief, power exhaust, high-capacity indoor coil, hot water coil, or indoor fan.
48P2,P3,P4,P5 UNITSSIZE
CORNER WEIGHTS (lb)
TOTAL
(lb)
AB
1234in. in.
Vertical Supply/Return
Horizontal Supply/Return
Low Heat
No Extended Chassis
0302002100910082000 6,019170
5
/
8
45 7/
8
0352056103110292053 6,169170 7/
8
45 7/
8
0401983137413721981 6,710198 1/
4
45 7/
8
0502079138613842076 6,925201 1/
4
45 7/
8
0552408220522022404 9,220228 7/
8
45 7/
8
0602417222322202414 9,275228 1/
2
45 7/
8
0702950245019132303 9,615244 5/
8
40 1/
4
075338526042033264310,665253 1/
8
40 1/
4
090325529112407269111,26526141 1/
2
100
324829292422268611,28526041
1
/
2
Vertical Supply/Return
Horizontal Supply/Return
High Heat
No Extended Chassis
0302034104210412032 6,149169
3
/
4
45 7/
8
0352088106410622085 6,29917045 7/
8
0402013141014082010 6,840197 3/
8
45 7/
8
0502108142214202105 7,055200 3/
8
45 7/
8
0552443223622332439 9,35022945 7/
8
0602452225422502449 9,405228 1/
2
45 7/
8
0702991248119372335 9,745244 3/
4
40 1/
4
075344426182044268910,795254 3/
8
40 1/
4
090330729312424273411,395262 1/
8
41 1/
2
100
330329462436273111,415261
1
/
4
41 1/
2
Vertical Supply/Return
Horizontal Supply/Return
Low Heat
with Extended Chassis
0302166109610942163 6,519187
1
/
8
45 7/
8
0352223111411122220 6,669187 3/
4
45 7/
8
0402148146014582145 7,210214 3/
4
45 7/
8
0502244147114692241 7,425217 7/
8
45 7/
8
0552558233123282554 9,770242 5/
8
45 7/
8
060
2567234923462563 9,825242
1
/
8
45 7/
8
070311725412023243410,165258 7/
8
40 1/
4
075355127472145277311,215266 3/
4
40 1/
4
090341930482521282711,815274 5/
8
41 1/
2
100
340930702538281911,835273
3
/
8
41 1/
2
Vertical Supply/Return
Horizontal Supply/Return
High Heat
with Extended Chassis
Vertical Supply/Return
Horizontal Supply/Return
High Heat
075423034242673330213,629291
3
/
8
40 1/
4
090405837303084335614,22729941 1/
2
100
405437453097335214,249298
1
/
4
41 1/
2
Vertical Supply/Return
Horizontal Supply/Return
Low Heat with Extended Chassis
0756905 984 768539114,049483
1
/
2
40 1/
4
090648415341268536214,647484 3/
8
41 1/
2
100
662014091165547414,669493
3
/
4
41 1/
2
Vertical Supply/Return
Horizontal Supply/Return
High Heat with Extended Chassis
0756969 993 776544114,179483
1
/
2
40 1/
4
090654115471280540914,777484 1/
4
41 1/
2
100
667914221176552314,799493
3
/
4
41 1/
2
Fig. 11 — Weight Distribution and Center of Gravity
19
1
3
2
A
B
4
1
NOTE: The weight distribution and center of gravity information include the impact of an economizer, the largest indoor fan motor, and a VFD (variable frequency
drive). On units with a return fan or high-capacity power exhaust, the largest motors and VFD are also included. These weights do not include the impact of other
factory-installed options such as barometric relief, power exhaust, high-capacity indoor coil, hot water coil, or indoor fan.
Vertical Supply/Return
Horizontal Supply/Return
High Heat
075354334492693276612,451226
7
/
8
40 1/
4
090337737673115279313,051233 3/
4
41 1/
2
100
337037853130278713,071232
7
/
8
41 1/
2
Vertical Supply/Return
Horizontal Supply/Return
Low Heat with Extended Chassis
075360936182825281812,871236
1
/
4
40 1/
4
090346739063230286713,471244 1/
4
41 1/
2
100
343739483264284213,491241
3
/
4
41 1/
2
Vertical Supply/Return
Horizontal Supply/Return
High Heat with Extended Chassis
075368136202826287413,001238
1
/
2
40 1/
4
090351739283248290813,601245 3/
8
41 1/
2
100
350539513267289813,621244
1
/
4
41 1/
2
Fig. 11 — Weight Distribution and Center of Gravity (cont)
Locate the four 1
/4-in. drain coupling assemblies and
mounting screws (shipped in a bag taped to the basepan in the
supply fan section, located behind the access panel marked
FAN SECTION). The drain couplings are a 10-gage plate with
1
a 1
/4 in. half coupling welded to the plate.
After final positioning of the unit, perform the following
procedure:
1. At each of the four secondary drain locations (marked
with labels on the unit base rail), position the drain coupling assembly in the side of the base rail. Mark the
screw holes and the drain hole locations on the base rail.
2. Drill holes for drain outlet (use 1
the mounting screws (use
3
3
/8-in. hole saw) and for
/16-in. drill bit).
3. Install a drain coupling assembly using screws provided
at each secondary drain hole location.
4. Using field-supplied fittings and pipe sections, assemble
U-traps at each secondary drain fitting. See Fig. 24. Provide minimum size of ½-in. pipe for secondary drains.
Use a trap at least 4-in. deep for size 030-070 units and
7-in. deep for size 075-100 units.
5. Apply a bead of RTV or similar sealant around the drain
assemblies.
Consult local plumbing codes for direction on joining multiple drain lines. Total size of any combined line does not need to
exceed nominal 2-in. size of primary drain connection.
Fill the U-traps at the secondary drain locations prior to unit
start-up. Also check the U-traps before each cooling season to
ensure the traps are filled and functioning properly.
20
Fig. 12 — Base Unit Dimensional Drawing — 48P2,P3030,035 (Standard Chassis Unit Shown)
a48-8613
21
Fig. 13 — Base Unit Dimensional Drawing — 48P4,P5030,035 (Standard Chassis Unit Shown)
a48-8614
22
23
Fig. 14 — Base Unit Dimensional Drawing — 48P2,P3040-050 (Standard Chassis Unit Shown)
a48-8615
Fig. 15 — Base Unit Dimensional Drawing — 48P4,P5040-050 (Standard Chassis Unit Shown)
a48-8616
24
Fig. 16 — Base Unit Dimensional Drawing — 48P2,P3055,060 (Standard Chassis Unit Shown)
a48-8617
25
Fig. 17 — Base Unit Dimensional Drawing — 48P4,P5055,060 (Standard Chassis Unit Shown)
a48-8618
26
Fig. 18 — Base Unit Dimensional Drawing — 48P2,P3070 (Standard Chassis Unit Shown)
a48-8619
27
Fig. 19 — Base Unit Dimensional Drawing — 48P4,P5070 (Standard Chassis Unit Shown)
a48-8620
28
29
Fig. 20 — Base Unit Dimensional Drawing — 48P2,P3075-100 (Standard Chassis Unit with Optional High-Capacity Power Exhaust Shown)
a48-8621
Fig. 21 — Base Unit Dimensional Drawing — 48P4,P5075-100 (Standard Chassis Unit with Optional Return Fan Shown)
a48-8622
30
A
B
Fig. 22 — Units with Optional Extended Chassis — Location of Coil Tracks
A = 4-in. (102 mm) min — Sizes 030-070
7-in. (178 mm) min — Sizes 075-100
Fig. 24 — Slab-Mounted Condensate
Drain Piping Details
a48-8458
Fig. 25 — Secondary Condensate Drain
Location (Curb Mount)
A = 4-in. (102 mm) min — sizes 030-070
7-in. (178 mm) min — sizes 075-100
Fig. 26 — Curb-Mounted Condensate
Drain Pipe Details
a48-8460
31
2” MIN.
(51 mm)
A
Step 9 — Install Outdoor Hoods (Units without
16-GAGE METAL
SEAL PLATE
(FIELD SUPPLIED
FIELD INSTALLED)
BOTTOM OF
BASE RAIL
Fig. 27 — Secondary Drain Seal Plate
Location (Slab Mount)
a48-8459
RTV
(ALL HOODS)
4”
OUTDOOR-AIR HOOD
Fig. 29 — Outdoor-Air and Economizer Hood
OUTDOOR
AIR HOOD
OUTDOOR
AIR HOOD
Fig. 28 — Outdoor Air Hood Installation
(Sizes 030-050)
SIDE HOOD
(ROTATE
OPEN)
SIDE HOOD
(ROTATE
OPEN)
END HOOD
(FIXED)
Fig. 30 — Economizer Outdoor-Air Hood
Installation (Sizes 030-050)
POWER EXHAUST (FIXED)
SIDE HOOD
(ROTATE
OPEN)
SIDE HOOD
(ROTATE
OPEN)
END HOOD
(FIXED)
Fig. 31 — Economizer with Power Exhaust
Outdoor-Air Hood Installation (Sizes 030-050)
a48-8461
Optional High-Capacity Power Exhaust)
UNIT SIZES 030-050
25% Outdoor-Air Hoods (Units without Economizer
Option) (Fig. 28)
1. Outdoor-air hoods are shipped bolted to the unit in a shipping position. Remove the 6 screws holding each 25%
outdoor air hood shipping cover in place.
2. Remove the holddown screw from each upper corner of
each hood.
3. Pivot hoods outward (2 hoods).
4. Install 17 screws around outside of each hood. (Screws
are in the fastener package taped to the basepan inside the
fan section.)
5. Apply a bead of RTV or similar sealant to corner of each
hood at pivot points to prevent water leaks. See Fig. 29.
Economizer Hoods (Units with Economizer Option)
(Fig. 30 and 31)
1. Remove the 4 screws holding each of the 2 economizer
side hoods in place.
2. Pivot hoods outwards (2 hoods).
3. Apply seal strip to vertical flange of hood sides.
4. Install hood sides of hood top using 19 screws (7 each
side, 5 top). Screws are in fastener package located with
the hood sides and seal strip which is taped inside the
unit.
5. Apply a bead of RTV or similar sealant to corners of
economizer hoods at pivot points to prevent water leaks.
See Fig. 29.
UNIT SIZES 055-100
25% Outdoor-Air Hoods (Fig. 32)
are factory installed on the 055-100 units.
— The outdoor-air hoods
Economizer Hoods (Units with Economizer Option) (Fig. 33-35)
1. Remove the 6 screws holding each of the 4 economizer
shipping covers in place.
2. Remove the holddown screw from each upper corner of
each economizer hood.
3. Pivot hoods outward (4 hoods).
4. Apply seal strip to vertical flange of hood sides.
5. Install 18 screws (5 each side, 6 top, and 2 bottom)
around the outside of each hood. (Screws are in the fastener package taped to the basepan inside the fan section.)
6. Apply a bead of RTV or similar sealant to corner of economizer hood at pivot points to prevent water leaks. See
Fig. 29.
32
OUTDOOR
AIR HOODS
(FIXED)
Fig. 32 — 25% Outdoor-Air Hood Location
END HOODS
(FIXED)
SIDE HOODS
(ROTATE
OPEN)
SIDE HOODS
(ROTATE OPEN)
Fig. 33 — Economizer Outdoor-Air Hood
Installation (Sizes 055-100)
END HOODS
(FIXED)
SIDE HOODS
(ROTATE
OPEN)
POWER
EXHAUST (FIXED)
SIDE HOODS
(ROTATE OPEN)
Fig. 34 — Economizer with Power Exhaust
Outdoor-Air Hood Installation (Sizes 055-100)
END HOODS
(FIXED)
SIDE HOODS
(ROTATE
OPEN)
RETURN/
EXHAUST (FIXED)
SIDE HOODS
(ROTATE OPEN)
Fig. 35 — Economizer with Return
Fan Outdoor-Air Hood Installation
(Units with Optional Return Fan)
Step 10 — Install Economizer Hoods (Units
with Optional High-Capacity Power
Exhaust) —
intake hoods, 2 on each side of the unit. See Fig. 36. Two small
hoods (one per side) are factory-installed and are pivoted
inside the unit chassis for shipment. Two large hoods are
shipped in packages located inside the unit. The large hoods
(one on each side) require field assembly and mounting.
INSTALL SMALL HOODS — To install the small economizer hoods, perform the following procedure:
1. Remove the 10 screws holding each of the small economizer hood shipping covers in place.
2. Pivot hoods outward. (There are a total of 2 hoods.)
3. Apply seal strip to vertical flange of hood sides.
4. Install 15 screws (4 each side, 7 across top) around the
outside of each hood. Screws are in the fastener package
taped to the basepan inside the fan section.
5. Apply a bead of RTV or similar sealant to corner of economizer hood at pivot points to prevent water leaks. (See
Fig. 29.)
INSTALL LARGE HOODS — Large hoods are shipped disassembled in the economizer section of the unit behind the
large economizer hood shipping cover. See Fig. 37 for assembly details for large economizer hoods. To install the large
economizer hoods, perform the following procedure:
1. Remove the 17 screws holding each of the large economizer hood shipping covers in place.
2. Remove the packages containing the disassembled large
economizer hoods (total of 2 packages). Each package
contains the following (see Fig. 37 for Item numbers): left
hood side (Item 1), right hood side (Item 2), hood top
(Item 3), hood front (Item 4), top filter flange (Item 5), 4
side filter flanges (Item 6), bottom support (Item 7), front
support (Item 8), 6 filters (Item 9), 9 filter clips (Item 10),
seal strip, and fasteners.
3. Place seal strip on backside of bottom support (Item 7)
along entire length of support, covering 6 clearance holes.
4. Attach bottom support piece (Item 7) to unit. Be sure seal
strip is between bottom support and panel on unit.
5. Place seal strip on
hood sides (Items 1 and 2).
6. Attach the side filter flanges (Item 6) to the left and right
hood sides (Items 1 and 2), 2 on each hood side.
7. Attach left and right hood sides (Items 1 and 2) to unit. Be
sure seal strip is between hood side and unit.
8. Place seal strip on
9. Attach top filter flange (Item 5) to hood top (Item 3).
10. Attach top hood to unit and to hood sides. Be sure seal
strip is between hood top and unit.
11. Attach front support (Item 8) between left and right hood
sides.
12. Place seal strip on all filter flanges.
13. Attach filter clips (Item 10) to front and bottom supports
(Items 7 and 8).
14. Install filters (Item 9). Filters are held in place with filter
clips.
15. Attach hood front (Item 4) to hood top and sides.
16. Apply RTV or similar sealant to 6 places shown in
Fig. 37.
The economizer uses a total of 4 outdoor
3
/4-in. flange on both the left and right
3
/4-in. flange on hood top (Item 3).
33
ACCESS DOOR
PE VFD
EXHAUST
AIR
LARGE ECONOMIZER
HOOD LOCATION
AUXILIARY
CONTROL BOX
POWER EXHAUST
ACCESS DOOR
SMALL ECONOMIZER
HOOD LOCATION
LEGEND
PE VFD — Power Exhaust Variable Frequency Drive
Fig. 36 — Economizer Hood Location — Units with High-Capacity Power Exhaust
APPLY RTV IN THE
INDICATED AREAS
AND BOTH ENDS OF
BOTTOM FILTER ROW
SEE DETAIL Z
DETAIL Z
SCALE 3:4
ITEM 1
ITEM 2
ITEM 3
ITEM 4
ITEM 5
ITEM 6
ITEM 8
ITEM 9
ITEM 7
ITEM 10
Fig. 37 — Large Economizer Hood Assembly
a48-8462
34
Step 11 — Route Field Wiring
UNIT SIZES 030-060 — Field wiring can be brought into the
unit through the basepan and roof curb or through the corner
post in the side of the unit next to the control box.
1
A 3
/2-in. FPT coupling for field power and a 3/4-in. FPT
coupling for 24 v control wiring are provided in the basepan.
There are two
7
/8-in. pilot holes in the corner post as shown on
the certified drawings. Use these holes as pilot holes for making the hole for field-supplied conduit in the corner post for
field power wiring.
CAUTION
Use care when drilling near condenser coil. Damage to unit
could result.
If field power wiring is brought through the roof curb, route
wiring out through one of the holes to the field-supplied disconnect and then back into the unit through the other hole. See
Fig. 38 and 39 for recommended disconnect location.
If power wiring is brought through the side of the unit, route
wiring from field-supplied disconnect through top hole into
unit.
If control wiring is to be brought in through the side of the
7
unit, a
/8-in. diameter hole must be drilled in the corner post
next to the control box.
UNIT SIZES 070-100 — Field wiring is brought into the unit
through the bottom of the control box. Wiring can be brought
through the roof curb through field-supplied watertight connections. See Fig. 40.
5
A 4
/32-in. hole for field power wiring and a 7/8-in. hole for
24 v control wiring are provided in the bottom of the control
box. Field-supplied couplings must be used when routing wiring into the control box.
See Fig. 40 for recommended disconnect location.
Step 12 — Make Field Electrical Connections
IMPORTANT: Units with VFDs (variable frequency
drives) 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 as defined by FCC
(Federal Communications Commission) regulations,
Subpart J of Part 15, 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 aluminum or copper wires. Maximum wire
size varies according to disconnect size.
Units without Factory-Installed Disconnect
ing 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. 41 for power wiring connections to the unit power
— When install-
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 control box behind the control box door for all units. See Fig. 42.
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. 43 for power wiring connections to the unit disconnect and equipment ground.
DISCONNECT SIZE
250 Amps
400 Amps
600 Amps
Operating Voltage
— Operating voltage to the compressor
QUANTITY...MAXIMUM WIRE SIZE
(MCM)
1...300
1...600
2...600
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 Tables 10-25
for unit electrical data.
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 =
455 + 464 + 455
1371
=
3
3
=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
7
457
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.
IMPORTANT: If the supply voltage phase imbalance is
more than 2%, contact 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.
35
RECOMMENDED
FIELD-SUPPLIED
DISCONNECT LOCATION
CONTROL BOX
CONTROL BOX
RECOMMENDED
FIELD-SUPPLIED
DISCONNECT
LOCATION
Fig. 39 — Disconnect Location — Size 040-060 Units
CAUTION
Use care when drilling into corner post to avoid damage to condenser coil.
Fig. 40 — Disconnect Location — Size 070-100 Units
CAUTION
Use care when drilling into corner post to avoid damage to condenser coil.
Fig. 38 — Disconnect Location — Size 030 and 035 Units
CAUTION
Use care when drilling into corner post to avoid damage to condenser coil.
a48-8463
a48-8464
a48-8465
36
23
131211
2221
DISCONNECT
PER NEC
EQUIP
GND
FIELD
WIRE
FACTORY
WIRE
FACTORY-INSTALLED
DISCONNECT
HANDLE LOCATION
FACTORY-INSTALLED
DISCONNECT
(HIDDEN)
21
11
22
12
23
13
DISCONNECT PER NEC
EQUIP GND
TB1
Fig. 43 — Field Power Wiring Connections
for Factory-Installed Disconnect
Fig. 42 — Factory-Installed Disconnect Location (End of Unit Shown)
FLA— Full Load Amps
HACR — Heating, Air Conditioning, and Refrigeration
Hp— Nominal Horsepower
LRA— Locked Rotor Amps
MCA— Minimum Circuit Amps (for wire sizing)
RLA— Rated Load Amps
* Used to determine minimum disconnect per NEC (National Electrical Code).
NOTE: Units use 2 (low heat) or 3 (high heat) combustion fan motors rated at
0.3 FLA each.
57
Step 13 — Connect Air Pressure Tubing — Be-
AUXILIARY
CONTROL
BOX
Fig. 44 — Auxiliary Control Box Location (Sizes 030-050)
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
2
/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 auxiliary control box. See Fig. 44 and 45 for auxiliary
control box location. See Fig. 46-48 for auxiliary control box
details. Use a nominal
1
/4-in. plastic tubing.
Refer to appropriate base unit Controls and Troubleshooting
book for instructions on adjusting set points for duct pressure
controls.
MODULATING POWER EXHAUST — The tubing for the
building pressure (BP) control (achieved via the modulating
power exhaust option) should sample building pressure in the
1
/4-in.
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 auxiliary control box. See Fig. 44 and 45 for auxiliary control box location.
See Fig. 46 and 47 for auxiliary control box details. Use a nom-
1
inal
/4-in. plastic tubing.
For instructions on adjusting BP control set points, refer to
the Controls and Troubleshooting book.
RETURN FAN POWER EXHAUST — The tubing for the
building pressure (BP) control (achieved via the return 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.
The units use a pressure transducer for sensing building
pressure. The BP transducer is located in the unit auxiliary control box. See Fig. 45 for auxiliary control box location. See
Fig. 48 for auxiliary control box details. Use a nominal
1
/4 in.
plastic tubing.
For instructions on adjusting BP control set points, refer to
the Controls and Troubleshooting book.
58
AUXILIARY
CONTROL
BOX
BP
DP
OACFM
TRANSDUCER
FS
DP
OACFM
TRANSDUCER
BP
FS
Fig. 45 — Auxiliary Control Box Location (Sizes 055-100)
LEGEND
Fig. 46 — Auxiliary Control Box Details
(Sizes 030-050)
BP— Building Pressure Transducer
DP— Duct Pressure Transducer
FS— Filter Switch
OACFM — Outdoor Air Cfm Sensor Transducer
LEGEND
Fig. 47 — Auxiliary Control Box Details
(Sizes 055-100 without Optional Return Fan)
BP— Building Pressure Transducer
DP— Duct Pressure Transducer
FS— Filter Switch
OACFM — Outdoor Air Cfm Sensor Transducer
59
Step 14 — Remove Supply-Fan Shipping
FS
BP
OACFM
TRANSDUCER
DP
RF
CFM
PP
SS
Fig. 48 — Auxiliary Control Box Details
(Size 075-100 Units with Optional Return Fan)
LEGEND
BP — Building Pressure
Transducer
OACFM — Outdoor Air Cfm
Sensor Transducer
DP — Duct Pressure
Transducer
PPSS — Plenum Pressure
Safety Switch
FS — Filter SwitchRFCFM — Return Fan Cfm Sensor Transducer
Fig. 49 — Shipping Brackets; Size 030-050 Units
Fig. 50 — Shipping Brackets;
Size 055-070 Units
Brackets — Supply-fan shipping brackets (4 per unit) must
be removed from each corner of the fan sled before starting
unit.
UNIT SIZES 030-050
1. To remove brackets, raise fan sled by turning adjusting
bolt counterclockwise until spring is compressed slightly.
2. Remove screws holding shipping bracket to unit cross
rail.
3. Remove shipping bracket (top of bracket is slotted so that
it will slide out).
4. After removing all shipping brackets, level fan sled using
the adjusting screws. On all 4 corners, dimension from
cross rail to fan sled should be as shown in Fig. 49.
UNIT SIZES 055-070 — To remove shipping brackets, remove the 6 screws holding each bracket to the cross rail. There
are 8 brackets per unit. See Fig. 50.
After removing all shipping brackets, level fan sled using
the adjusting screws. On all 4 corners dimension from cross
rail to fan sled should be as shown in Fig. 50.
UNIT SIZES 075-100 — To remove shipping brackets, remove the 6 screws holding each bracket to the cross rail. There
are 4 brackets per unit. See Fig. 51.
After removing all shipping brackets, level fan sled using
the adjusting screws. On all 4 corners dimension from cross
rail to fan sled should be as shown in Fig. 51.
must be removed from each corner of the fan sled before starting unit.
To remove shipping brackets, remove 2 screws holding
each bracket to the cross rail. There are 4 brackets per unit.
60
Optional return fan shipping brackets
After removing all shipping brackets, level the fan using the
Fig. 51 — Shipping Brackets (Sizes 075-100)
a48-8468
Fig. 52 — Optional Return
Fan Shipping Brackets
NOTE: All dimensions are in inches.
adjustment screws. On all 4 corners the dimension from cross
rail to fan sled should be as shown in Fig. 52.
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.
1
A
/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. 53.
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 Staged Gas
or Modulating Gas Control —
rooftop units may be ordered with an optional factory-installed
staged gas or modulating gas control system that monitors
heating operation of the rooftop.
Refer to the Unit Controls and Troubleshooting book for in-
formation on configuring staged gas or modulating gas control.
The 48P Series large
61
Step 18 — Install Flue/Inlet Hoods and
*NPT plug is field supplied.
NOTE: Follow all local codes.
Fig. 53 — Gas Piping Details
FLUE HOOD AND
FLUE DEFLECTOR
HOOD (48SERIES
HIGH-HEAT ONLY)
INLET HOOD
FLUE HOOD AND
DEFLECTOR
HOOD
INLET HOOD
INLET HOOD
14-IN.
14-IN.
14-IN.
Fig. 54 — Flue/Inlet Hood Locations, 030-050 Units
Baffles — The flue/inlet hoods and baffles are shipped in a
package taped to the basepan in the fan section. The flue (outlet) hoods are pre-assembled. The flue deflector, inlet hoods,
and baffles require assembly.
The hoods are located on the heating section access panel as
shown in Fig. 54 (sizes 030-050), Fig. 55 (sizes 055-100 with
low heat and vertical supply), Fig. 56 (sizes 055-100 with low
heat and horizontal supply), and Fig. 57 (sizes 055-100 with
high heat). The inlet baffles are located inside the access panel
as illustrated in Fig. 58 (sizes 030-050), Fig. 59 (sizes 055-100
with modulating low heat and horizontal supply), and Fig. 60
(sizes 055-100 with modulating high heat). See Table 26 for a
list of parts used to assemble each hood and quantities of each
hood type and baffle 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. 61) to access panel using screws provided. Hoods are placed over each combustion outlet.
3. Install flue deflector baffle inside flue deflector hood. See
Fig 62 for V-type deflector and Fig. 63 for curve-type
deflector. For V-type deflector, screw the baffle and hood
together with screw provided. Refer to Table 26 for
usage.
4. Install flue deflector hood assembly over each flue outlet
hood. See Fig. 64. Observe the offset mounting hole locations in the deflector hood flanges when attaching hood to
panel. Holes in the mounting flange must be at the bottom
when attached.
5. Inlet hoods are shipped unassembled and must be assembled on the access panel (see Fig. 65-67). 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 top hoods for all
hood assemblies (6-in., 14-in., and 30-in.). Attach speed
clips to screen. Insert screen into bottom opening of 6-in.
and 14-in. hoods and secure it with 3 screws. To ease the
installation, the 30-in. hood screen may be inserted from
inside of access panel (gas section door) into bottom
opening of hood. Secure with 5 screws. Attached view
port cover over 14-in. inlet hood opening (Fig. 66). Secure with two screws.
6. Install inlet baffle on the access panel with the screw(s)
provided. See Fig. 68 for 14-in baffle and Fig. 69 for
30-in baffle. Attach 14-in baffle from the outside of the
access panel. The 30-in baffle should be installed from inside of the access panel. Secure with three screws.
Step 19 — Install Supply-Air Thermistors
(Staged and Modulating Gas Units Only) —
Supply-air thermistors are a field-installed, factory-provided
component. Three supply-air thermistors are shipped with
staged and modulating gas units inside the unit control box.
Thermistor wires must be connected to the SGC in the unit
control box. See Table 27. 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 portion of the
unit.
Table 26 — Flue Hood, Inlet Hood, and Baffle Usage
INLET BAFFLE
(30-in.)
PUSH
BAFFLE
DOWN SO
THESE 2
HOLES
ALIGN
FLUE DEFLECTOR
BAFFLE
FLUE
DEFLECTOR
HOOD
SCREW
Fig. 60 — Baffle Locations, Sizes 055-100,
Modulating High Heat, Vertical and
Horizontal Supply Units
Fig. 61 — Flue Outlet Hood
Fig. 62 — Flue Deflector Baffle (V-Type)
a48-8586
a48-8587
HOOD OR
BAFFLE TYPE
6-in. Inlet
Hood
14-in. Inlet
Hood
30-in. Inlet
Hood
Flue Outlet
Hood
Flue Deflector
(V-Type)
Flue Deflector
(Curve-Type)
14-in. Baffle
30-in. Baffle
PARTS LISTFIG. NO.
Top (6-in.)
Side (Left)
Side (Right)
Screen
Speed Clips
Screws
Top (14-in.)
Side (Left)
Side (Right)
Screen
Cover
Speed Clips
Screws
Top (30-in.)
Side (Left)
Side (Right)
Screen
Speed Clips
Screws
Pre-assembled
Hood
Deflector
Baffle
Screws
Hood
Deflector
Baffle
Screws
Baffle
Screws
Baffle
Screws
65——1111
65,6633
67——
61122323
6212
63——
6812————
69——
Sizes 030-050
(Low Heat)
Sizes 030-050
(High Heat)
QUANTITY USED
Sizes 055-070
(Low Heat)
1
(Vertical
Supply Only)
1
(Horizontal
Supply Only)
2
(Horizontal
Supply Only)
2
(Vertical
Supply Only)
1
(Modulating
Horizontal
Supply Only)
Sizes 055-070
(High Heat)
—
2
323
———
2
Sizes 075-100
(Low Heat)
1
(Vertical
Supply Only)
1
(Horizontal
Supply Only)
1
(Modulating
Horizontal
Supply Only)
Sizes 075-100
(High Heat)
—
2
2
64
OBSERVE OFFSET
MOUNTING HOLE
LOCATIONS WHEN
INSTALLING FLUE
DEFLECTOR HOODS.
ACCESS PANEL
Fig. 63 — Flue Deflector Baffle (Curve-Type)
Fig. 64 — Mounting Deflector Hoods
Fig. 65 — Inlet Hood Assembly (6-in. and 14-in.)
VIEW PORT
COVER
Fig. 66 — 14-in. Inlet Hood View Port Cover
Installation
a48-8588
OPENING
COVER
(14-IN. HOOD ONLY)
FLUE DEFLECTOR
HOOD
FLUE DEFLECTOR
BAFFLE (BOTH HOODS)
MAKE
SCREW
HOLES
ALIGN
SIDE (TYP
BOTH SIDES)
HOOD
SCREEN
SPEED CLIP(TYP 3)
65
Table 27 — SGC Thermistor Designations
INLET
HOOD
INLET HOOD
SIDE
INLET HOOD
SIDE
SCREEN(WITH SPEED CLIPS)
a48-8473
Fig. 67 — Inlet Hood Assembly (30-in.)
Fig. 68 — Air Baffle (14-in.)
Fig. 69 — Air Baffle (30-in.)
a48-8591
a48-8590
THERMISTOR
SAT1J8 – 1,2 (SGC)
SAT2J8 – 3,4 (SGC)
SAT3J8 – 5,6 (SGC)
LIMTTEMPJ8 – 15,16 (SGC)
SGC — Staged Gas Controller
CONNECTION
Step 20 — Install Optional Motormaster® V
Control — The Motormaster V control is a motor speed
control device which adjusts condenser fan motor speed in response to varying liquid refrigerant pressure. A properly applied
Motormaster V control extends the operating range of air-conditioning systems and permits operation at lower outdoor ambient
temperatures.
The optional Motormaster V controls are factory-installed.
Field-fabricated and installed wind baffles are also required for
units in areas with prevailing winds of more than 5 mph and
where temperatures drop below 32 F. The Motormaster V control permits operation of the unit to an ambient temperature of
–20 F. The control regulates the speed of one or two 3-phase fan
motors depending on unit size. Replacement of the fan motor on
most units is not necessary.
INSTALL FIELD-FABRICATED WIND BAFFLES
To avoid the possibility of electrical shock, open all disconnects before installing or servicing this accessory.
WARNING
PIN
POINT
FUNCTION AND LOCATION
Thermistors
Supply-Air Thermistor (SAT) — Inserted into supply section
underneath the gas heat section (factory-provided,
field-installed)
Supply-Air Thermistor (SAT) — Inserted into supply section
underneath the gas heat section (factory-provided,
field-installed)
Supply-Air Thermistor (SAT) — Inserted into supply section
underneath the gas heat section (factory-provided,
field-installed)
Limit Switch Thermistor (LIMTTEMP) — Inserted next the
lower limit switch (factory-installed)
On size 040-060 units, in areas with prevailing winds of
more than 5 mph and where temperatures drop below 32 F,
wind baffles must be field fabricated to ensure proper cooling
cycle operation at low-ambient temperatures with Motormaster
V controls. Wind baffles are not needed on size 030, 035, and
070-100 units. See Fig. 70 for baffle details. Use 20-gage galvanized sheet metal, or similar corrosion-resistant material for the
baffles. Use field-supplied screws to attach baffles to unit.
Screws should be
be more than
1
/4-in. diameter or larger. Screws should not
1
/2-inch in length. Drill required screw holes for
mounting baffles.
CAUTION
To avoid damage to refrigerant coils, electrical components, and wiring use extreme care when drilling screw
holes and screwing in fasteners.
PART NO .
HH79NZ033
66
WIND BAFFLE
Fig. 70 — Wind Baffle Details
NOTE: 48/50P030, 035, and 070-100 units do not require
baffles.
BAFFLE INSTALLATION LOCATION (SIZES 050 AND 060 SHOWN)
a48-8561
a48-8560
67
Step 21 — Install Unit Accessories — For appli-
cations requiring accessories, the following packages are
available:
All units:
•barometric relief
•space temperature sensor
•CO
•space temperature sensor with CO
sensor
2
sensor
2
•airflow switch
•filter switch
•smoke detector
All 48P2,P4 (constant volume) units:
•modulating power exhaust
All 48P3,P5 (variable air volume) units:
•modulating power exhaust
Refer to the individual accessory installation instructions in
each accessory package for information on installing accessories.
CONTROLS INSTALLATION
Constant Volume (CV) 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. Control options and accessories available for CV
units are:
• thermostats
• enthalpy sensor
• enthalpy switch
• relative humidity sensor
• CEM (controls expansion module)
• Navigator™ hand-held display
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 instruc-
tions shipped with the accessory thermostat. Locate thermostat
assembly on a solid interior wall to sense average temperature.
Route thermostat cable or equivalent leads of colored wire
from subbase terminals through conduit into the low voltage
connections in the main control box. For thermostat TB201
connections, see Fig. 71.
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.
The 48P2,P4 units
Variable Air Volume (VAV) Units — The 48P3,P5
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:
• enthalpy sensor
• enthalpy switch
• relative humidity sensor
• CEM (controls expansion module)
• Navigator hand-held display
VAV CONTROL WIRING — The recommended types of
control wiring are shown below:
MANUFACTURER
Alpha1895—
AmericanA21451A48301
Belden8205884421
ColumbiaD6451—
ManhattanM13402M64430
Quabik6130—
Regular WiringPlenum Wiring
PART NO.
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. 72.
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. 72.
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. 73.
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. 74.
Option and Accessory Control Wiring — The P
Series units may be used in applications with additional control
features, options, or accessories. Refer to the Controls and
Troubleshooting manual for more information concerning
installation and configuration of options and accessories.
Figures 74-84 contain wiring information on the following
features:
• heat interlock relay (Fig. 74)
• outdoor air enthalpy switch (Fig. 75)
•CO
space sensor (Fig. 76)
2
• filter status switch (Fig. 77)
• fan status switch (Fig. 78)
• space humidity sensor (Fig. 79)
• return air humidity sensor (Fig. 79)
• return air CO
• return air smoke detector (Fig. 81)
• smoke control — fire shutdown (Fig. 82)
sensor (Fig. 80)
2
®
68
• smoke control — purge (Fig. 83)
R
Y1Y2W1W2G
R
Y1Y2W1W2G
FIELD SUPPLIED THERMOSTAT
RC
TB201
X
C
Fig. 71 — Field Control Thermostat Wiring
a48-8474
Fig. 72 — T55 or T56 Wiring
a48-8475
RED
BLK
SENSOR 1
SENSOR 2
SENSOR 3
SENSOR 4
SENSOR 1
SENSOR 2
SENSOR 4
SENSOR 5
SENSOR 6
SENSOR 7
SENSOR 8
SENSOR 9
TB201
TB202
1
2
1
2
SENSOR 3
Fig. 73 — Space Temperature Averaging Wiring
NOTE: Use T55 sensor only.
a48-8476
• smoke control — evacuation (Fig. 83)
• smoke control — pressurization (Fig. 83)
• CCN connections (Fig. 84)
SEN
T56- SPTT55- SPT
SENSET
JUMPER
TERMINALS
UNIT
TB201
1
3
24
11
5
6
9
7
8
10
13
15
12
16
14
69
FIELD INSTALLED (FIELD
SUPPLIED) JUMPER WHEN
ENTHALPY SWITCH NOT USED
RCB
J4
6
5
MBB
J8
7
8
TB201
FILTER STATUS
MBB
J8
Fig. 74 — Heat Interlock Relay Wiring
Fig. 75 — Outdoor Air Enthalpy Switch Wiring
Fig. 76 — CO
2
Space Sensor Wiring
Fig. 77 — Filter Status Wiring
a48-8477
a48-8478
a48-8479
a48-8480
a48-8481
RCB
J8
RELAY 5
13
14
15
10
9
70
RCB
J4
CEM
J6
4
3
RED
BRN
Fig. 78 — Fan Status Switch Wiring
Fig. 79 — Space and Return Air Humidity Sensor Wiring
Fig. 80 — Return Air CO
2
Sensor Wiring
a48-8482
a48-8483
71
MBB
J6
TB201
1
2
BLU
WHT
FIRE SHUTDOWN
RCB J4
TB 202
14
15
16
17
18
19
TB201TB201
1
2
Fig. 81 — Return Air Smoke Detector Wiring
Fig. 82 — Fire Shutdown Wiring
Fig. 83 — Purge, Evacuation, and Pressurization Wiring
a48-8483
a48-8485
a48-8486
72
TB201
MBB
J5
Fig. 84 — CCN Connections
a48-8487
Carrier Comfort Network® (CCN) Interface —
The 48P 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 28 for cables that meet the requirements.
Table 28 — CCN Connection Approved
MANUFACTURERCABLE PART NO.
Alpha2413 or 5463
AmericanA22503
Belden8772
Columbia02525
Shielded Cables
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
+RED1
COMMONWHITE2
–BLACK3
CCN BUS CONDUCTOR
INSULATION COLOR
COMM1 PLUG
PIN NO.
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. 84):
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.)
3. Wire the CCN to the screw terminals on the COMM
board as follows (Fig. 84):
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.
73
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. 85-87.
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
Table 29 — MS/TP Wiring Recommendations
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.
MS/TP WIRING RECOMMENDATIONS — Recommen-
dations are shown in Tables 29 and 30. 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 31 and Fig. 82 and 83.
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. 82 for wiring.
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)
AWG— American Wire Gage
CL2P— Class 2 Plenum Cable
CMP— Communications Plenum Rated
FEP— Fluorinated Ethylene Polymer
TC— Tinned Copper
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—25160PVCLP0520LC
W241P-2000F8284125120-OR—
Belden RMCORP
Contractors
Wire and Cable
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. 82 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. 82 for wiring.
75
SMOKE PURGE — Smoke Purge mode removes smoke
Fig. 86 — Open System Network Wiring
Fig. 86 — BT485 Installation
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. 82 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
FUNCTION
Supply FanOffOnOffOn
VFD†—Open/On—Open/On
EconomizerClosedOpenOpenOpen
Return Air
Damper
Exhaust
Fans
Exhaust
Damper
manual switches or relays) that will selectively interrupt and
override standard factory control sequences. See Table 31 and
Fig. 81 and 82 for more information.
Copyright 2010 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480079-01Printed in U.S.A.Form 48P-4SIPg 7611-10Replaces: 48P-3SI
VAV — Variable Air Volume
VFD — Variable Frequency Drive
*Power exhaust option required for this mode.
†Applicable to VAV units with appropriate options.
Table 31 — Smoke Control Modes
MODE
Fire
Shutdown
OpenClosedClosedClosed
OffOffOnOn
ClosedClosedOpenOpen
LEGEND
Pressur-
ization
Evacuation*
Smoke
Purge*
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