Specifications

ManualsBrandsBryant ManualsHeat Pump551B

Form No. PDS 551B.36.4

COMMERCIAL

SINGLE PACKAGE ROOFTOP

ELECTRIC COOLING UNITS

Bryant has designed these units based on customer needs

and requests to be the most efficient and reliable rooftop units

ever made.

FEATURES/BENEFITS

• Most efficient cooling in the industry using scroll

compressors

• Full range of electric heat sizes available — exactly the right

size for your needs.

• High reliability — non-corrosive condensate pans, pre-

painted cabinets and primed interior panels, and all units are

fully protected by internal safeties

• Quietest operation in the industry — all compressors

mounted on independent vibration isolators. Standard belt-

driven evaporator fan motors on all units

• Ease of maintenance achieved by standard size filters,

optional direct digital controls, tool-less filter access, simple

compressor access, permanently lubricated belt driven fan

motors, optional disconnect switch, optional 115-v conve-

nience outlet, and optional hinged access panels

• Perfect Humidity™ dehumidification package. This factory

installed option improves the dehumidification capability of

the rooftop unit and helps control humidity levels in the condi-

tioned space.

BRYANT MEANS TOP QUALITY AND RELIABILITY —

Each

component utilized in these units is designed and tested for a

minimum of 15 years operation under the harshest conditions.

Every unit is thoroughly run tested at the factory in each oper-

ating mode and evacuated prior to final charging. Every coil is

leak-tested with helium particles. Automated run testing allows

accurate undisputed tests and measurements which are sec-

ond to none in the industry.

Each unit contains a factory printout indicating tested pres-

sures, amperages, dates, and inspectors, providing certifica-

tion of the unit’s status at the time of manufacture.

Units are equipped with valuable safety controls designed to

monitor and protect the unit for life. The standard safeties

include:

• low-pressure/loss-of-charge switch

• high-pressure switch

• freeze-protection thermostat

• internal compressor overload

• exclusive Cycle-LOC™ circuit board that provides compres-

sor anti-cycling

• refrigerant filter drier

The cabinet is constructed of galvanized steel, bonderized and

coated with a prepainted baked enamel finish. The paint finish

is a non-chalking type, and is capable of exceeding Federal

Test Method Standard No. 141 (Method 6061) 500-Hour Salt

Spray Test. In addition, all internal cabinet panel surfaces are

primed, allowing the entire unit to have a longer life and more

attractive appearance.

EASY MAINTENANCE AND INSTALLATION

All Units are Factory Shipped in the Vertical Discharge

Configuration

for fit-up to standard roof curbs. (One acces-

sory curb fits sizes 036-072; another accessory curb fits

sizes 090-150.) The contractor can order and install the roof

curbs early in the construction stage, before decisions on size

requirements have been made.

All Units Feature Roll-Formed Baserail

design with forklift

slots on 3 sides of the unit and rigging holes for easier maneu-

vering and installation. Stretch-wrap packaging protects the

unit during shipment and storage.

Units are Easily Converted

from vertical to horizontal applica-

tions to make retrofit and add-on jobs easier. To convert from

vertical to horizontal discharge, simply relocate 2 panels.

The same basic unit can be used for a variety of applications

and can be quickly modified at the jobsite. Standard high-

performance, belt-driven, evaporator-fan motors enable the

551B036-150 units to operate in most ductwork configurations.

Ductwork Connections are Simplified

by the logical 2 to 1

aspect ratio. On vertical discharge units, ductwork attaches

directly to the roof curb.

Thru-the-Bottom Service Connection

capability allows

power and control wiring to be routed through the unit basepan

and roof curb (if installed), thereby minimizing roof penetrations

(to prevent water leaks). Both power and control connections

are made on the same side of the unit to simplify installation.

The Non-Corrosive, Sloped, Condensate Drain Pan

is in

conformance with ASHRAE (American Society of Heating,

Refrigeration, and Air Conditioning Engineers) Standard 62 to

meet many Indoor-Air Quality (IAQ) specifications. The con-

densate drain pan offers both bottom and end drain capability

Model 551B

Dura

Pac

Plus Series

Sizes 036-150

3 to 12

Tons

551B036-072

551B090-150

Summary of content (68 pages)

PAGE 1
Model 551B COMMERCIAL SINGLE PACKAGE ROOFTOP ELECTRIC COOLING UNITS DuraPac Plus Series Sizes 036-150 3 to 121/2 Tons 551B036-072 Bryant has designed these units based on customer needs and requests to be the most efficient and reliable rooftop units ever made. FEATURES/BENEFITS • Most efficient cooling in the industry using scroll compressors • Full range of electric heat sizes available — exactly the right size for your needs.
PAGE 2
to minimize roof penetrations. The bottom drain can be used in conjunction with the thru-the-bottom connections. An external trap must be field supplied. Standard 2-in. Throwaway Filters are easily accessed through a removable filter access panel located directly above the air intake hood; no tools are required to change the filters. All Units are Designed with a Single Continuous Top Piece to eliminate leaking at the seams or gasketing.
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FEATURES/BENEFITS (cont) REFRIGERATION SYSTEM PROTECTION SINGLE PIECE TOP PANEL TOOL-LESS FILTER ACCESS SLEEVE BEARING PERMANENTLY LUBRICATED MOTORS ON-SITE CONVERTIBILITY FROM VERTICAL TO HORIZONTAL DISCHARGE HIGH-EFFICIENCY COILS AND FIXED ORIFICE REFRIGERANT METERING SYSTEM SLOPED, NON-CORROSIVE CONDENSATE DRAIN PAN PERFECT HUMIDITY™ DEHUMIDIFICATION PACKAGE (FACTORYINSTALLED OPTION) HIGH-EFFICIENCY COILS FULLY MODULATING ECONOMIZER (OPTION OR ACCESSORY) 3
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MODEL NUMBER NOMENCLATURE 551B E X 090 000 A A 551B – Packaged Rooftop High Efficiency Cooling Unit Voltage Designation J – 208/230-1-60 P – 208/230-3-60 E – 460-3-60 T – 575-3-60 Factory-Installed Options* X – No Heat Installed (Field-installed electric heaters available) Nominal Tons 036 – 3 090 048 – 4 102 060 – 5 120 072 – 6 150 – – – – 7-1/2 8-1/2 10 12-1/2 Electric Heaters 000 – No Factory-Installed Electric Heaters *Refer to unit price pages for ordering codes and factory-installed option
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PHYSICAL DATA UNIT 551B NOMINAL CAPACITY (tons) OPERATING WEIGHT (lb) Unit Durablade Economizer EconoMi$er Perfect Humidity™ Dehumidification Package Roof Curb COMPRESSOR Quantity Oil (oz) REFRIGERANT TYPE Operating Charge (lb-oz) Standard Unit Unit With Perfect Humidity Dehumidification Package CONDENSER FAN Quantity...Diameter (in.) Nominal Cfm Motor Hp...Rpm Watts Input (Total) CONDENSER COIL Standard Unit Rows...Fins/in. Total Face Area (sq ft) Unit With Perfect Humidity Dehumidification Package Rows...
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PHYSICAL DATA (cont) UNIT 551B NOMINAL CAPACITY (tons) OPERATING WEIGHT (lb) Unit Durablade Economizer EconoMi$er Perfect Humidity™ Dehumidification Package Roof Curb COMPRESSOR Quantity Oil (oz) (each compressor) REFRIGERANT TYPE Operating Charge (lb-oz) Standard Unit Circuit 1 Circuit 2 Unit With Perfect Humidity Dehumidification Package Circuit 1 Circuit 2 CONDENSER FAN Quantity...Diameter (in.) Nominal Cfm Motor Hp...Rpm Watts Input (Total) CONDENSER COIL Standard Unit Rows...Fins/in.
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OPTIONS AND ACCESSORIES ITEM Electric Heater and Single Point Kit Integrated Economizer (Durablade) Integrated Economizer (EconoMi$er) 25% Manual Outdoor Air Damper 50% Manual Outdoor-Air Damper Two-Position Damper (25% Open) Two-Position Damper (100% Open) High-Static Evaporator-Fan Motor and Drive (Sizes 036-120, Three-Phase Units Only) Perfect Humidity™ Dehumidification Package Convenience Outlet Unit-Mounted Disconnect (Non-Fused)** Hinged Panel Options†† Roof Curb (14 in.) Roof Curb (24 in.
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OPTIONS AND ACCESSORIES (cont) HAIL GUARD THERMOSTAT H C Thermostat (24 v) provides one- or 2-stage cooling for control of unit. Matching subbases are available with or without tamperproof switches and automatic changeover. Condenser coil hail guard accessory protects coil against damage from hail and other flying debris (field installed).
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OPTIONS AND ACCESSORIES (cont) ACCUSENSOR III (Differential Enthalpy) ACCUSENSOR™ II (Enthalpy Control) B REV. B C SO TR S 198818A D 1 P T MINIMUM 3 POSITION OPEN + 5 4 2 P1 T1 TR C 24VAC 2 TR1 1 3 mA MIN. AT 11 VDC B A ENTHALPY CONTROL 3 D CW–SETPOINTS–CCW RUSH AT 24VAC CONTACTS SHOWN IN HIGH ENTHALPY OR UNPOWERED STATE °F CONTACT RATINGS: 1.5A RUN, 3.5A IN OUTDOOR TEMP.
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OPTIONS AND ACCESSORIES (cont) DURABLADE ECONOMIZER ECONOMI$ER ECONOMI$ER PLUG CONTROLLER GEAR-DRIVEN DAMPER ACTUATOR OUTDOOR AIR TEMPERATURE SENSOR BAROMETRIC RELIEF DAMPERS Factory-installed EconoMi$er utilizes a microprocessor-based control, gear drive damper system, low pressure drop characteristics, built-in spring return (for close upon power loss), and an integral barometric damper. NOTE: EconoMi$er is available for vertical ductwork applications factory installed.
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BASE UNIT DIMENSIONS UNIT 551B 036 048 060 072 STD UNIT WEIGHT Lb 435 445 465 520 Kg 197 202 211 236 DURABLADE ECONOMIZER WEIGHT Lb Kg 34 15.4 34 15.4 34 15.4 34 15.4 ECONOMI$ER WEIGHT Lb 47 47 47 47 Kg 21.3 21.3 21.3 21.3 CORNER WEIGHT (A) Lb Kg 124 56.2 127 57.6 133 60.3 149 67.6 CORNER WEIGHT (B) Lb Kg 106 48.1 108 49.0 113 51.3 127 57.6 CORNER WEIGHT (C) Lb Kg 95 43.1 97 44.0 101 45.8 112 50.8 CORNER WEIGHT (D) Lb Kg 110 49.9 113 51.3 118 53.5 132 59.9 A 13/8″ Dia.
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BASE UNIT DIMENSIONS (cont) Lb Kg Lb Kg CORNER WEIGHT (A) Lb Kg Ft-in. mm Ft-in. mm Ft-in.
PAGE 13
ACCESSORY DIMENSIONS UNIT SIZE 551B “A” ROOF CURB ACCESSORY 036-072 1′-2″ [356] 2′-0″ [610] CRRFCURB001A00 CRRFCURB002A00 “B” 1′-911/16″ [551] “C” “D” ALT DRAIN HOLE “E” GAS 3/4″ 1′-4″ 13/4″ [45] [406] 1/2″ 3/4″ “F” POWER CONTROL 3/4″ [19] NPT 11/4″ [31.7] [19] NPT [12.7] NPT 3/4″ [19 ] NPT 1/2″ CRBTMPWR001A00 CRBTMPWR002A00 [12.7] NPT 11/4″ [31.7] [19 ] NPT CONNECTOR ACY PKG CRBTMPWR003A00 CRBTMPWR004A00 NOTES: 1. Roof curb accessory is shipped unassembled. 2. Insulated panels. 3.
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ACCESSORY DIMENSIONS (cont) UNIT SIZE 551B 090-150 ROOF CURB ACCESSORY 1′-2″ [356] CRRFCURB003A00 2′-0″ [610] CRRFCURB004A00 “A” UNIT SIZE 551B 090-150 “B” “C” “D” ALT DRAIN HOLE 2′-87/16″ 1′-1015/16″ 13/4″ [44.5] [827] [583] “E” GAS 3/4″ [19] NPT — “F” POWER 1″ [25] NPT 1″ [25] NPT or 2″ [50.8] NPT “G” CONTROL 3/4″ [19] NPT CONNECTOR ACY PKG CRBTMPWR001A00 CRBTMPWR002A00 NOTES: 1. Roof curb accessory is shipped disassembled. 2. Insulated panels. 1 in. thick polyurethane foam, 13/4 in.
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SELECTION PROCEDURE (With 551B048 Example) I DETERMINE COOLING AND HEATING REQUIREMENTS AT DESIGN CONDITIONS. Given: Required Cooling Capacity (TC) . . . . . . . . . . 44,000 Btuh Sensible Heat Capacity (SHC). . . . . . . . . . . . 32,000 Btuh Required Heating Capacity . . . . . . . . . . . . . . 50,000 Btuh Condenser Entering-Air Temperature . . . . . . . . . . . . 95 F Evaporator Entering-Air Temperature . . . . . . . . .82 F edb, 67 F ewb Evaporator Air Quantity . . . . . . . . . . . . . . . . . . . .
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PERFORMANCE DATA COOLING CAPACITIES, STANDARD UNITS 551B036 (3 TONS) Temp (F) Air Ent Condenser (Edb) 75 85 95 105 115 125 TC SHC kW TC SHC kW TC SHC kW TC SHC kW TC SHC kW TC SHC kW 900/0.14 78 45.6 14.5 2.24 44.4 14.1 2.51 42.9 13.6 2.80 41.3 13.0 3.11 72 41.9 20.4 2.19 40.7 19.9 2.46 39.3 19.5 2.75 37.7 18.8 3.06 36.0 18.3 3.41 34.2 17.6 3.78 67 38.7 25.2 2.16 37.5 24.7 2.42 36.1 24.1 2.71 34.6 23.5 3.02 33.0 22.9 3.36 31.3 22.2 3.73 62 35.7 29.7 2.12 34.5 29.2 2.39 33.1 28.4 2.66 31.7 27.8 2.98 29.
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PERFORMANCE DATA (cont) COOLING CAPACITIES, STANDARD UNITS (cont) 551B060 (5 TONS) Temp (F) Air Ent Condenser (Edb) 75 85 95 105 115 125 TC SHC kW TC SHC kW TC SHC kW TC SHC kW TC SHC kW TC SHC kW 1500/0.08 78 80.4 25.6 3.65 78.5 25.1 4.20 72 70.8 34.1 3.53 68.9 33.5 3.98 66.8 32.8 4.48 64.3 32.0 5.03 61.5 31.0 5.61 58.7 30.0 6.27 67 65.4 42.7 3.49 63.2 41.8 3.94 60.6 40.7 4.43 57.7 39.6 4.96 54.8 38.4 5.55 51.6 37.2 6.19 62 58.5 49.9 3.44 55.3 48.4 3.87 52.4 47.0 4.35 49.9 45.8 4.87 47.3 44.5 5.46 44.
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PERFORMANCE DATA (cont) COOLING CAPACITIES, STANDARD UNITS (cont) 551B090 (71/2 TONS) Temp (F) Air Ent Condenser (Edb) 75 85 95 105 115 125 2250/0.095 78 111.9 35.4 5.15 108.8 34.4 5.86 107.4 34.0 6.69 103.4 32.6 7.52 TC SHC kW TC SHC kw TC SHC kW TC SHC kW TC SHC kW TC SHC kW 72 105.5 50.6 5.15 102.5 49.7 5.86 98.9 48.5 6.65 95.3 47.3 7.51 91.0 45.9 8.43 86.2 44.1 9.38 67 96.9 63.6 5.07 93.6 62.4 5.79 90.1 61.2 6.58 86.2 59.6 7.44 82.0 58.0 8.33 77.8 56.4 9.29 62 87.6 75.7 5.04 83.6 73.9 5.73 79.3 71.
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PERFORMANCE DATA (cont) COOLING CAPACITIES, STANDARD UNITS (cont) 551B120 (10 TONS) Temp (F) Air Ent Condenser (Edb) 75 85 95 105 115 125 TC SHC kW TC SHC kW TC SHC kW TC SHC kW TC SHC kW TC SHC kW 3000/0.31 78 152.7 46.7 7.34 150.5 44.7 8.28 147.7 43.9 9.33 72 140.3 65.6 7.35 137.7 65.0 8.29 133.8 63.9 9.33 128.7 62.3 10.46 123.2 60.4 11.66 117.5 58.5 12.99 67 129.4 82.2 7.21 125.3 81.2 8.13 120.7 79.6 9.16 115.4 77.6 10.28 109.1 75.1 11.47 101.8 72.5 12.77 62 115.0 97.4 7.12 110.0 95.2 8.02 103.0 92.
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PERFORMANCE DATA (cont) COOLING CAPACITIES, UNITS WITH PERFECT HUMIDITY™ OPTION 551B036 (3 TONS) TEMP (F) AIR ENT CONDENSER (Edb) 75 85 95 105 115 125 TC SHC kW TC SHC kw TC SHC kW TC SHC kW TC SHC kW TC SHC kW 900/0.14 78 44.9 12.5 2.26 42.1 10.8 2.53 39.2 9.1 2.82 37.1 7.5 3.13 72 41.3 17.5 2.19 38.6 15.2 2.46 35.9 13.0 2.74 33.8 10.9 3.05 31.8 9.0 3.40 28.7 6.9 3.78 67 37.3 22.4 2.14 34.4 20.1 2.40 31.4 17.9 2.68 29.7 15.8 3.00 28.0 13.7 3.36 26.3 12.2 3.73 62 34.3 26.7 2.10 31.6 25.1 2.37 28.8 23.
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PERFORMANCE DATA (cont) COOLING CAPACITIES, UNITS WITH PERFECT HUMIDITY™ OPTION (cont) 551B060 (5 TONS) TEMP (F) AIR ENT CONDENSER (Edb) 75 85 95 105 115 125 TC SHC kW TC SHC kW TC SHC kW TC SHC kW TC SHC kW TC SHC kW 1500/0.08 78 79.4 21.8 3.77 75.1 18.9 4.31 75.6 24.1 4.62 72 69.9 29.0 3.61 65.9 25.3 4.05 61.9 21.6 4.53 57.7 18.1 5.05 53.4 14.7 5.60 48.7 10.9 6.26 67 62.7 36.9 3.55 59.1 34.0 3.97 55.2 31.1 4.43 51.1 27.8 4.93 47.2 24.6 5.49 42.0 19.6 6.12 62 56.2 43.9 3.51 51.7 41.9 3.91 47.7 40.0 4.
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PERFORMANCE DATA (cont) COOLING CAPACITIES, UNITS WITH PERFECT HUMIDITY™ OPTION (cont) 551B090 (71/2 TONS) TEMP (F) AIR ENT CONDENSER (Edb) 75 85 95 105 115 125 TC SHC kW TC SHC kw TC SHC kW TC SHC kW TC SHC kW TC SHC kW 2250/0.095 78 104.4 31.1 5.10 99.9 27.4 5.79 97.6 24.4 6.53 91.7 20.7 7.34 72 98.4 44.5 5.05 94.2 39.7 5.74 89.9 34.8 6.42 84.6 30.0 7.26 79.2 25.2 8.10 72.8 20.1 9.10 67 91.1 55.4 4.96 85.8 51.3 5.65 80.5 47.2 6.33 75.3 42.5 7.16 70.1 37.8 7.99 64.5 33.4 8.94 62 81.1 67.0 4.87 76.
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PERFORMANCE DATA (cont) COOLING CAPACITIES, UNITS WITH PERFECT HUMIDITY™ OPTION (cont) 551B120 (10 TONS) TEMP (F) AIR ENT CONDENSER (Edb) 75 85 95 105 115 125 TC SHC kW TC SHC kW TC SHC kW TC SHC kW TC SHC kW TC SHC kW 3000/0.025 78 146.2 42.7 7.09 139.5 35.4 8.03 133.5 29.5 8.97 72 134.3 60.0 7.03 127.6 51.5 7.96 120.9 43.0 8.88 112.0 36.1 10.04 103.0 29.2 11.19 94.1 22.3 12.35 67 122.5 76.1 6.84 115.4 68.8 7.86 108.3 61.5 8.87 99.9 54.1 9.96 91.5 46.7 11.06 83.1 39.3 12.15 62 111.4 93.7 6.72 104.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — VERTICAL DISCHARGE UNITS 551B036 (3 TONS) — STANDARD MOTOR (BELT DRIVE) Airflow (Cfm) 900 1000 1100 1200 1300 1400 1500 0.1 Rpm 581 644 687 733 754 810 841 0.2 Bhp 0.12 0.19 0.22 0.26 0.29 0.35 0.42 Rpm 673 709 746 785 826 868 911 Bhp 0.18 0.22 0.26 0.32 0.38 0.45 0.53 External Static Pressure (in. wg) 0.3 0.4 Rpm Bhp Rpm Bhp 805 0.25 736 0.22 782 0.28 835 0.30 806 0.30 867 0.35 843 0.35 903 0.41 891 0.43 942 0.48 937 0.51 984 0.57 985 0.61 1029 0.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont) 551B048 (4 TONS) — STANDARD MOTOR (BELT DRIVE) Airflow (Cfm) 1200 1300 1400 1500 1600 1700 1800 1900 2000 0.1 Rpm 542 576 610 646 681 718 754 791 828 0.2 Bhp 0.16 0.20 0.24 0.28 0.33 0.39 0.45 0.52 0.60 Rpm 616 644 673 704 735 768 801 836 870 0.3 Bhp 0.21 0.25 0.30 0.35 0.40 0.46 0.53 0.60 0.68 Rpm 678 704 732 761 790 836 851 832 864 External Static Pressure (in. wg) 0.4 0.6 Bhp Rpm Bhp Rpm Bhp 842 0.44 0.27 739 0.32 867 0.50 0.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont) 551B060 (5 TONS) — STANDARD MOTOR (BELT DRIVE) — SINGLE-PHASE UNITS External Static Pressure (in. wg) Airflow 0.1 0.2 0.4 (Cfm) Rpm Bhp Rpm Bhp Rpm Bhp 1500 711 0.33 769 0.39 878 0.51 1600 751 0.39 806 0.45 906 0.53 1700 791 0.46 846 0.53 941 0.66 1800 852 0.55 905 0.62 1002 0.78 1037 0.88 1900 894 0.64 945 0.72 1072 0.98 2000 936 0.74 984 0.82 1024 0.93 1108 1.10 2100 978 0.85 1021 0.97 1064 1.05 1145 1.22 2200 1064 1.10 1104 1.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont) 551B060 (5 TONS) — HIGH-STATIC MOTOR (BELT DRIVE) Airflow (Cfm) 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 0.2 Rpm 789 826 865 905 946 984 1024 1064 1104 1145 1186 0.4 Bhp 0.40 0.46 0.54 0.62 0.72 0.82 0.93 1.05 1.18 1.32 1.48 Rpm 896 931 966 1002 1037 1072 1108 1145 1183 1222 1262 Bhp 0.53 0.61 0.69 0.78 0.88 0.98 1.10 1.22 1.36 1.45 1.68 External Static Pressure (in. wg) 0.6 Rpm Bhp 990 0.67 1020 0.75 1051 0.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont) 551B072 (6 TONS) — STANDARD MOTOR (BELT DRIVE) Airflow (Cfm) 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 0.1 Rpm 852 894 936 978 1021 1064 1107 1150 1193 1237 1280 1324 1368 0.2 Bhp 0.55 0.64 0.74 0.85 0.97 1.10 1.24 1.39 1.56 1.74 1.94 2.15 2.37 Rpm 905 945 984 1024 1064 1104 1145 1186 1228 1269 1311 1354 1396 Bhp 0.62 0.72 0.82 0.93 1.05 1.18 1.32 1.48 1.65 1.83 2.03 2.24 2.46 External Static Pressure (in.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont) 551B090 (71/2 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE) Airflow (Cfm) 2250 2300 2400 2500 2550 2600 2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3750 0.2 Rpm 511 518 534 549 557 565 581 597 613 629 646 662 679 696 712 729 746 755 0.4 Bhp 0.52 0.55 0.61 0.67 0.71 0.74 0.81 0.89 0.97 1.06 1.15 1.25 1.35 1.46 1.57 1.69 1.85 1.89 Rpm 592 599 613 627 633 639 652 665 679 694 709 724 740 756 771 787 803 811 Bhp 0.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont) 551B102 (81/2 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE) Airflow (Cfm) 2550 2600 2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3750 3800 3900 4000 4100 4200 4250 0.2 Rpm 557 565 581 597 613 629 646 662 679 696 712 729 746 755 763 780 796 813 830 839 0.4 Bhp 0.71 0.74 0.81 0.89 0.97 1.06 1.15 1.25 1.35 1.46 1.57 1.69 1.82 1.89 1.95 2.09 2.23 2.39 2.55 2.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont) 551B120 (10 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE) External Static Pressure (in. wg) Airflow 0.2 0.4 0.6 0.8 (Cfm) Rpm Bhp Rpm Bhp Rpm Bhp Rpm Bhp 3000 459 0.46 625 0.85 691 1.01 734 1.10 3100 478 0.57 637 0.90 702 1.08 744 1.16 3200 500 0.62 647 0.97 712 1.16 753 1.23 3300 519 0.69 658 1.03 721 1.23 762 1.30 3400 537 0.77 669 1.10 731 1.30 773 1.38 3500 561 0.86 680 1.17 741 1.37 784 1.47 3600 592 0.98 692 1.24 751 1.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — VERTICAL DISCHARGE UNITS (cont) 551B150 (121/2 TONS) — STANDARD MOTORS (BELT DRIVE) Airflow (Cfm) 3700 3800 3900 4000 4100 4200 4300 4400 4500 4600 4700 4800 4900 5000 5100 5200 5300 5400 5500 5600 5700 5800 5900 6000 6100 6200 6300 0.2 Rpm — — — — — — — — — — — — — — — 873 888 903 918 933 948 963 978 993 1008 1023 1038 0.4 Bhp — — — — — — — — — — — — — — — 2.82 2.97 3.13 3.30 3.47 3.65 3.83 4.00 4.22 4.42 4.63 4.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS 551B036 (3 TONS) — STANDARD MOTOR (BELT DRIVE) Airflow (Cfm) 900 1000 1100 1200 1300 1400 1500 0.1 Rpm 526 570 614 658 703 725 755 0.2 Bhp 0.06 0.09 0.13 0.16 0.20 0.29 0.33 Rpm 584 627 670 710 752 776 816 Bhp 0.08 0.13 0.16 0.23 0.27 0.31 0.38 External Static Pressure (in. wg) 0.3 0.4 Rpm Bhp Rpm Bhp 656 0.12 734 0.22 800 0.26 738 0.19 812 0.29 758 0.23 780 0.28 840 0.32 808 0.32 868 0.37 845 0.38 891 0.42 870 0.43 924 0.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont) 551B048 (4 TONS) — STANDARD MOTOR (BELT DRIVE) Airflow (Cfm) 1200 1300 1400 1500 1600 1700 1800 1900 2000 0.1 Rpm 514 545 577 609 642 675 709 743 778 0.2 Bhp 0.15 0.18 0.21 0.26 0.30 0.36 0.41 0.48 0.55 Rpm 590 615 642 670 699 728 759 790 836 0.3 Bhp 0.20 0.23 0.27 0.31 0.36 0.42 0.48 0.55 0.62 Rpm 657 680 704 729 755 782 810 838 875 External Static Pressure (in. wg) 0.4 0.6 Bhp Rpm Bhp Rpm Bhp 0.25 723 0.30 828 0.42 849 0.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont) 551B060 (5 TONS) STANDARD MOTOR (BELT DRIVE) — SINGLE-PHASE UNITS External Static Pressure (in. wg) Airflow 0.1 0.2 0.4 (Cfm) Rpm Bhp Rpm Bhp Rpm Bhp 1500 665 0.31 729 0.35 843 0.47 1600 703 0.36 763 0.40 872 0.53 1700 741 0.40 801 0.47 902 0.60 1800 765 0.45 821 0.51 923 0.65 1900 802 0.45 854 0.58 953 0.73 2000 840 0.60 888 0.66 984 0.82 2100 878 0.69 923 0.75 1015 0.91 1046 1.01 2200 916 0.78 958 0.85 1079 1.13 2300 954 0.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont) 551B060 (5 TONS) HIGH-STATIC MOTOR (BELT DRIVE) Airflow (Cfm) 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 0.2 Rpm 722 754 787 821 854 900 923 958 993 1029 1066 Bhp 0.46 0.52 0.58 0.65 0.73 0.82 0.91 1.01 1.13 1.25 1.39 External Static Pressure (in. wg) 0.6 Rpm Bhp 937 0.59 963 0.65 991 0.73 1019 0.81 1046 0.90 1073 0.99 1101 1.08 1129 1.19 1160 1.31 1190 1.43 1220 1.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont) 551B072 (6 TONS) STANDARD MOTOR (BELT DRIVE) Airflow (Cfm) 1800 1900 2000 2100 2200 2300 2400 2500 2600 2700 2800 2900 3000 0.1 Rpm 765 802 840 878 916 954 993 1031 1070 1109 1148 1188 1227 0.2 Bhp 0.45 0.45 0.60 0.69 0.78 0.89 1.00 1.13 1.26 1.41 1.57 1.74 1.92 Rpm 821 854 888 923 958 993 1029 1066 1103 1140 1177 1215 1253 Bhp 0.51 0.58 0.66 0.75 0.85 0.96 1.07 1.20 1.34 1.48 1.64 1.81 2.00 External Static Pressure (in. wg) 0.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont) 551B090 (71/2 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE) Airflow (Cfm) 2250 2300 2400 2500 2550 2660 2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3750 0.2 Rpm 465 471 482 494 501 507 520 533 546 559 572 585 598 610 623 636 649 655 0.4 Bhp 0.43 0.45 0.50 0.54 0.57 0.59 0.65 0.71 0.77 0.83 0.90 0.96 1.03 1.10 1.17 1.25 1.33 1.37 Rpm 554 559 569 581 587 592 604 615 626 637 648 660 671 682 694 707 720 727 Bhp 0.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont) 551B102 (81/2 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE) Airflow (Cfm) 2550 2660 2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3750 3800 3900 4000 4100 4200 4250 0.2 Rpm 501 507 520 533 546 559 572 585 598 610 623 636 649 655 661 674 687 699 712 719 0.4 Bhp 0.57 0.59 0.65 0.71 0.77 0.83 0.90 0.96 1.03 1.10 1.17 1.25 1.33 1.37 1.41 1.49 1.57 1.60 1.75 1.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont) 551B120 (10 TONS) — STANDARD AND HIGH-STATIC MOTOR (BELT DRIVE) External Static Pressure (in. wg) Airflow 0.2 0.4 0.6 (Cfm) Rpm Bhp Rpm Bhp Rpm Bhp 3000 459 0.35 595 0.74 657 0.88 3100 478 0.46 605 0.79 667 0.94 3200 500 0.57 615 0.85 679 1.01 3300 519 0.62 625 0.90 691 1.08 3400 537 0.69 637 0.97 702 1.16 3500 561 0.77 647 1.03 712 1.23 3600 592 0.86 658 1.10 721 1.30 3700 607 0.97 670 1.18 732 1.37 3800 621 1.05 681 1.25 742 1.
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PERFORMANCE DATA (cont) FAN PERFORMANCE — HORIZONTAL DISCHARGE UNITS (cont)) 551B150 (121/2 TONS) — STANDARD MOTOR (BELT DRIVE) Airflow (Cfm) 3700 3800 3900 4000 4100 4200 4300 4400 4500 4600 4700 4800 4900 5000 5100 5200 5300 5400 5500 5600 5700 5800 5900 6000 6100 6200 6300 0.2 Rpm — — — — — — — — — — — — — — — — — 869 885 901 917 933 949 965 981 997 1014 0.4 Bhp — — — — — — — — — — — — — — — — — 2.92 3.09 3.26 3.44 3.62 3.81 4.01 4.21 4.42 4.
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PERFORMANCE DATA (cont) FAN RPM AT MOTOR PULLEY SETTING*; STANDARD MOTOR/DRIVE UNIT 551B 036 048 060 (single-phase) 060 (3-phase) and 072 090, 102 120 150 MOTOR PULLEY TURNS OPEN 21 / 2 3 31 / 2 0 1/2 1 11 / 2 2 4 41 / 2 5 51 / 2 6 1090 1185 1055 1150 1025 1115 990 1080 960 1045 925 1015 890 980 860 945 825 910 795 875 760 840 — — — — 1460 1425 1385 1350 1315 1275 1240 1205 1165 1130 1095 1055 1020 1585 1540 1490 1445 1400 1350 1305 1260 1210 1165 1120 — —
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PERFORMANCE DATA (cont) EVAPORATOR-FAN MOTOR DATA — HIGH-STATIC MOTORS UNIT 551B UNIT PHASE MAXIMUM CONTINUOUS BHP* MAXIMUM OPERATING WATTS* 036 Three 2.40 2120 048 Three 2.40 2120 060 Three 2.90 2615 072 Three 2.90 2615 090, 102 Three 4.20 3775 120 Three 5.25 4400 MAXIMUM AMP DRAW 6.7 3.0 3.0 6.7 3.0 3.0 8.6 3.9 3.9 8.6 3.9 3.9 12.2 5.5 5.5 17.3 8.5 8.
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PERFORMANCE DATA (cont) Durablade Economizer Barometric Relief Damper Characteristics — 551B090-150 Durablade Economizer Barometric Relief Damper Characteristics — 551B036-072 0.25 STATIC PRESSURE (in. wg) STATIC PRESSURE (in. wg) 0.25 0.20 0.15 0.10 0.05 0.20 0.15 0.10 0.05 0.00 600 800 1000 FLOW IN CUBIC FEET PER MINUTE (cfm) 0.
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PERFORMANCE DATA (cont) FLOW IN CUBIC FEET PER MINUTE (cfm) 50 FLOW (CFM) 40 30 20 10 0 0 0.5 0.75 0.25 3 TO 6 TON STATIC PRESSURE (in. wg) 7 1/2 TO 12 1/2 TON 1 80 60 40 20 0 0.00 0.10 0.20 0.40 0.30 0.50 STATIC PRESSURE (in. wg) 3 to 6 Ton 71/2 to 121/2 Ton Vertical EconoMi$er Outdoor-Air Leakage Horizontal EconoMi$er Outdoor Air Leakage 0.40 STATIC PRESSURE (in. wg) STATIC PRESSURE (in. wg) 0.35 0.30 0.25 0.20 0.15 0.10 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 0.05 0.
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ELECTRIC HEATING CAPACITIES UNIT 551B VOLTAGE (60 Hz) 208/230 (single phase) 208/230 (3 phase) 036 460 (3 phase) 208/230 (single phase) 208/230 (3 phase) 048 460 (3 phase) 208/230 (single phase) 208/230 (3 phase) 060 460 (3 phase) ACCESSORY kW ACCESSORY HEATER PART NUMBER CRHEATER---A00 4.4 6.5 8.7 10.5 13.0* 4.4 6.5 8.7 10.5 16.0 6.0 8.8 11.5 14.0 4.4 8.7 13.0* 17.4* 21.0* 6.5 8.7 16.0 21.0* 6.0 11.5 14.0 23.0* 6.5 8.7 13.0* 17.4* 21.0* 6.5 10.5 16.0 21.0* 26.5* 6.0 11.5 14.0 23.0* 25.
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ELECTRICAL DATA STANDARD MOTOR UNITS WITHOUT ELECTRICAL CONVENIENCE OUTLET UNIT 551B036 (3 Tons) 551B048 (4 Tons) 551B060 (5 Tons) NOMINAL VOLTAGE (V-Ph-Hz) VOLTAGE RANGE COMPRESSOR OFM IFM Min Max RLA LRA FLA FLA 208/230-1-60 187 254 16.0 88.0 0.7 4.9 208/230-3-60 187 254 10.3 77.0 0.7 4.9 460-3-60 414 508 5.1 39.0 0.4 2.2 575-3-60 518 632 4.2 31.0 0.4 2.2 208/230-1-60 187 254 23.7 129.0 0.7 4.9 208/230-3-60 187 254 13.5 99.0 0.7 4.
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ELECTRICAL DATA (cont) STANDARD MOTOR UNITS WITHOUT ELECTRICAL CONVENIENCE OUTLET (cont) UNIT NOMINAL VOLTAGE (V-Ph-Hz) VOLTAGE COMPRESSOR OFM IFM RANGE (each) (each) Min Max RLA LRA FLA 208/230-3-60 187 254 12.4 88.0 1.4 551B090†† (71/2 Tons) 460-3-60 414 508 6.4 44.0 0.7 575-3-60 518 632 4.8 34.0 0.7 208/230-3-60 187 254 15.0 99.0 1.4 551B102†† (81/2 Tons) 551B120†† (10 Tons) 551B150†† (121/2 Tons) 460-3-60 414 508 8.2 49.5 0.7 575-3-60 518 632 5.8 40.0 0.
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ELECTRICAL DATA (cont) STANDARD MOTOR UNITS WITH ELECTRICAL CONVENIENCE OUTLET UNIT 551B036 (3 Tons) 551B048 (4 Tons) 551B060 (5 Tons) NOMINAL VOLTAGE (V-Ph-Hz) VOLTAGE RANGE COMPRESSOR OFM IFM Min Max RLA LRA FLA FLA 208/230-1-60 187 254 16.0 88.0 0.7 4.9 208/230-3-60 187 254 10.3 77.0 0.7 4.9 460-3-60 414 508 5.1 39.0 0.4 2.2 575-3-60 518 632 4.2 31.0 0.4 2.2 208/230-1-60 187 254 23.7 129.0 0.7 4.9 208/230-3-60 187 254 13.5 99.0 0.7 4.
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ELECTRICAL DATA (cont) STANDARD MOTOR UNITS WITH ELECTRICAL CONVENIENCE OUTLET (cont) UNIT NOMINAL VOLTAGE (V-Ph-Hz) VOLTAGE RANGE COMPRESSOR OFM IFM (each) (each) ELECTRIC HEAT Min Max RLA LRA FLA FLA 208/230-3-60 187 254 12.4 88.0 1.4 7.5 551B090†† (71/2 Tons) 460-3-60 414 508 6.4 44.0 0.7 3.4 575-3-60 518 632 4.8 34.0 0.7 3.4 208/230-3-60 187 254 15.0 99.0 1.4 7.5 551B102†† (81/2 Tons) 551B120†† (10 Tons) 551B150†† (121/2 Tons) 460-3-60 414 508 8.2 49.5 0.
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ELECTRICAL DATA (cont) HIGH-STATIC MOTOR UNITS WITHOUT ELECTRICAL CONVENIENCE OUTLET UNIT 551B NOMINAL VOLTAGE (V-Ph-Hz) VOLTAGE RANGE Min COMPRESSOR (each) Max RLA LRA OFM IFM FLA FLA 208/230-3-60 187 254 10.3 77.0 0.7 5.8 460-3-60 414 508 5.1 39.0 0.4 2.6 575-3-60 518 632 4.2 31.0 0.4 2.6 208/230-3-60 187 254 13.5 99.0 0.7 5.8 460-3-60 414 508 7.4 49.5 0.4 2.6 575-3-60 518 632 5.8 40.0 0.4 2.6 208/230-3-60 187 254 17.3 123.0 1.5 7.
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ELECTRICAL DATA (cont) HIGH-STATIC MOTOR UNITS WITHOUT ELECTRICAL CONVENIENCE OUTLET (cont) UNIT 551B NOMINAL VOLTAGE (V-Ph-Hz) VOLTAGE RANGE Min 208/230-3-60 187 Max COMPRESSOR OFM (each) (each) RLA LRA FLA IFM FLA 254 12.4 88.0 1.4 10.6 090†† 460-3-60 414 508 6.4 44.0 0.7 4.8 575-3-60 518 632 4.8 34.0 0.7 4.8 208/230-3-60 187 254 15.0 99.0 1.4 10.6 102†† 460-3-60 414 508 8.2 49.5 0.7 4.8 575-3-60 518 632 5.8 40.0 0.7 4.8 208/230-3-60 187 254 17.3 125.
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ELECTRICAL DATA (cont) HIGH-STATIC MOTOR UNITS WITH ELECTRICAL CONVENIENCE OUTLET UNIT 551B NOMINAL VOLTAGE (V-Ph-Hz) VOLTAGE RANGE Min COMPRESSOR Max RLA LRA OFM IFM FLA FLA 208/230-3-60 187 254 10.3 77.0 0.7 5.8 460-3-60 414 508 5.1 39.0 0.4 2.6 575-3-60 518 632 4.2 31.0 0.4 2.6 208/230-3-60 187 254 13.5 99.0 0.7 5.8 460-3-60 414 508 7.4 49.5 0.4 2.6 575-3-60 518 632 5.8 40.0 0.4 2.6 208/230-3-60 187 254 17.3 123.0 1.5 7.5 460-3-60 414 508 9.
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ELECTRICAL DATA (cont) HIGH-STATIC MOTOR UNITS WITH ELECTRICAL CONVENIENCE OUTLET (cont) UNIT 551B NOMINAL VOLTAGE (V-Ph-Hz) VOLTAGE RANGE Min 208/230-3-60 187 Max COMPRESSOR OFM (each) (each) RLA LRA FLA IFM FLA 254 12.4 88.0 1.4 10.6 090†† 460-3-60 414 508 6.4 44.0 0.7 4.8 575-3-60 518 632 4.8 34.0 0.7 4.8 208/230-3-60 187 254 15.0 99.0 1.4 10.6 102†† 460-3-60 414 508 8.2 49.5 0.7 4.8 575-3-60 518 632 5.8 40.0 0.7 4.8 208/230-3-60 187 254 17.3 125.0 1.
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TYPICAL PIPING AND WIRING Vertical Discharge Ducting LEGEND NEC — National Electrical Code *Factory-supplied, internally mounted disconnect available as an option.
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CONTROLS modulating the return and outdoor air dampers to maintain a 55 F supply air set point. If the supply-air temperature (SAT) is greater than 57 F, the EconoMi$er modulates open, allowing a greater amount of outdoor air to enter the unit. If the SAT drops below 53 F, the outdoor air damper modulates closed to reduce the amount of outdoor air. When the SAT is between 53 and 57 F, the EconoMi$er maintains its position.
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CONTROLS (cont) When the outdoor-air temperature is below the OAT setting and the thermostat calls for Y1 and G (cooling), the economizer damper moves to the minimum position when the evaporator fan starts. The first stage of cooling is provided by the economizer. If the supply-air temperature is above 57 F, a switch on the supply-air thermostat is closed between the T2 terminal and the 24 vac terminal.
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CONTROLS (cont) As the refrigerant leaves the evaporator, the refrigerant passes a low-pressure switch in the suction line. This low-pressure switch will de-activate the Perfect Humidity™ package when the suction pressure reaches 60 psig. The low-pressure switch is an added safety device to protect against evaporator coil freeze-up. The low-pressure switch will only de-activate and open the liquid line solenoid valve in the Perfect Humidity circuit.
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TYPICAL WIRING SCHEMATIC (SINGLE FAN UNITS) 59
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TYPICAL WIRING SCHEMATIC (TWO-FAN UNITS) 60
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TYPICAL WIRING SCHEMATIC (cont) AHA AWG C CAP CB CC CLO COMP D EC ECON EPS — — — — — — — — — — — — EQUIP ER FPT FSS FU GND HC HPS IFC IFM IFR LPS LSM MTR OAT OFC OFM OLR P PL QT — — — — — — — — — — — — — — — — — — — — — Adjustable Heat Anticipator American Wire Gage Contactor, Compressor Capacitor Circuit Breaker Cooling Compensator Compressor Lockout Compressor Motor Diode Enthalpy Control Economizer Emergency Power Supply (9-v Battery) Equipment Economizer Relay Freeze Protection Thermostat Filter Sta
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APPLICATION DATA (cont) 13. PERFECT HUMIDITY™ DEHUMIDIFICATION PACKAGE — This option provides greater dehumidification by further subcooling the hot liquid refrigerant leaving the condenser coil. The Perfect Humidity package consists of a subcooling coil located on the leaving-air side of the evaporator coil. The location of the coil in the indoor airstream enhances the latent capacity of the 551B rooftop units by up to 40%.
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APPLICATION DATA (cont) • At lower outdoor temperatures, rooftop units with dehumidification devices are subject to low suction pressure conditions. The Perfect Humidity dehumidification package contains a low-pressure switch that deactivates the Perfect Humidity dehumidification package under low suction pressure conditions without deactivating the compressors. • Improved humidity control allows increased outdoor-air ventilation in hot and humid geographical areas.
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Pressure Enthalpy Curve NOTE: Numbers 1 through 4 indicate point numbers referred to in Perfect Humidity™ Dehumidification Package Design Effects section.
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LEGEND db — Dry Bulb wb — Wet Bulb Point 1 — Entering Air (F) 80 db/67 wb Point 2 — Leaving Air (F) 58.9 db/56.4 wb (Without Subcooler) Point 3 — Leaving Air (F) 63.0 db/56.
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GUIDE SPECIFICATIONS PACKAGED ROOFTOP COOLING UNIT WITH ELECTRIC HEAT OPTION — CONSTANT VOLUME APPLICATION HVAC GUIDE SPECIFICATIONS SIZE RANGE: 3 to 121/2 TONS, NOMINAL COOLING BRYANT MODEL NUMBER: 551B PART 1 — GENERAL 1.01 SYSTEM DESCRIPTION Outdoor rooftop- or slab-mounted, electrically controlled cooling unit with optional heat utilizing a scroll compressor for cooling duty and electric resistance coils for heating duty.
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GUIDE SPECIFICATIONS (cont) I. J. K. L. M. * b. Heating section shall be provided with the following minimum protections: 1) High-temperature limit switches. 2) Overcurrent protection. c. High-pressure switch. d. Low-pressure switch. e. Freeze protection thermostat. Operating Characteristics: 1. Unit shall be capable of starting and running at 125 F ambient outdoor temperature, meeting maximum load criteria of ARI Standard 210/240 or 360 at ±10% voltage. 2.
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GUIDE SPECIFICATIONS (cont) * * * * * * 11. Thermostat and Subbase: Provides staged cooling and heating automatic (or manual) changeover, fan control, and indicator light. 12. Thru-The-Bottom Service Connectors: Kit shall provide connectors to permit electrical connections to be brought to the unit through the basepan. 13. Electronic Programmable Thermostat: Capable of using deluxe full-featured electronic thermostat.