548J PACKAGE HEAT PUMP 3 TO 12.5 NOMINAL TONS. Product Data C the environmentally sound refrigerant

Transcription

1 PACKAGE HEAT PUMP 3 TO 12.5 NOMINAL TONS Product Data C08515 the environmentally sound refrigerant

2 TABLE OF CONTENTS PAGE FEATURES AND BENEFITS... 3 MODEL NUMBER NOMENCLATURE... 4 FACTORY OPTIONS & ACCESSORIES... 5 AHRI CAPACITY RATING... 8 SOUND PERFORMANCE... 9 PHYSICAL DATA ELECTRIC HEAT ELECTRICAL DATA WEIGHTS & DIMENSIONS OPTION/ACCESSORY WEIGHTS APPLICATION/SELECTION DATA PAGE COOLING TABLES HEATING CAPACITIES STATIC PRESSURE TABLES ECONOMIZER, BAROMETRIC RELIEF AND PE PERF FAN PERFORMANCE ELECTRICAL INFO MCA / MOCP TYPICAL WIRING DIAGRAMS SEQUENCE OF OPERATION GUIDE SPECIFICATIONS Your Bryant Packaged Heat Pump rooftop unit (RTU) was designed by customers for customers. With no-strip screw collars, handled access panels, and more we ve made your unit easy to install, easy to maintain and easy to use. Easy to install: All Legacy Linet units are field-convertible to horizontal air flow which makes it easy to adjust to unexpected job site complications. Lighter units make easy replacement. Bryant ton rooftops fit on existing Bryant curbs dating back to Also, our large control box gives you room to work and room to mount Bryant accessory controls. Easy to maintain: Easy access handles by Bryant provide quick and easy access to all normally serviced components. Our no-strip screw system has superior holding power and guides screws into position while preventing the screw from stripping the unit s metal. Take accurate pressure readings by reading condenser pressure with panels on. Simply remove the black, composite plug, route your gauge line(s) through the hole, and connect them to the refrigeration service valve(s). Now, you can take refrigeration system pressure readings without affecting the condenser airflow. Easy to use: The newly designed, central terminal board by Bryant puts all your connections and troubleshooting points in one convenient place, standard. Most low voltage connections are made to the same board and make it easy to find what you re looking for and easy to access it. Bryant rooftops have high and low pressure switches, a filter drier, and 2-in. (51mm) filters standard. 2

3 FEATURES AND BENEFITS S Up to 28% lighter than similar industry units. Lighter rooftops make easier replacement jobs. S ton units fit on existing Bryant rooftop curbs making the utility connections the same. This saves time and money on replacement jobs. S Standardized components and layout. Standardized components and controls make service and stocking parts easier. S Scroll compressors on all units. This makes service, stocking parts, replacement, and trouble-shooting easier. S Crankcase heater on all models (except 04 size) provides added protection in all applications. S Precision-sized suction line accumulator provides high reliability by preventing liquid from entering the compressor during low ambient conditions and reverse cycle switch over. S Field convertible from vertical to horizontal airflow configuration on all models. No special kit required on models. Supply duct kit required for 14 model only. S 4-way reversing valve rapidly changes the flow of refrigerant to quickly changeover from cooling to heating and heating to cooling. S Easy-adjust, belt drive motor available on all sizes. Bryant provides a factory solution for most points in the fan performance table. There s no need for field-supplied drives or motors. S 3-5 ton models come standard with an Electric Drive X13, 5 speed/torque motor to provide exact performance in many applications. Belt drive motor available on all three phase models. S Provisions for bottom or side condensate drain. S Capable of thru-the -base or thru-the -curb electrical routing. S Dependable time/temperature defrost logic provides a defrost cycle, if needed, every 30, 60, 90 or 120 minutes and is adjustable. S Single -point electrical connection. S Sloped, composite drain pan sheds water; and won t rust. S Standardized controls and control box layout. Standardized components and controls make stocking parts and service easier. S Clean, easy to use control box. S Standard coils are copper round tube, aluminum plate fin with optional coil coatings and copper fin design. S Color-coded wiring. S Large, laminated wiring and power wiring drawings which are affixed to unit make troubleshooting easy. S Single, central terminal board for test and wiring connections. S Fast-access, handled, panels for easy access to the blower and blower motor, control box, and compressors. S No-strip screw system guides screws into the panel and captures them tightly without stripping the screw, the panel, or the unit. S Exclusive, newly-designed indoor refrigerant header for easier maintenance and replacement. S Mechanical cooling (115_F to25_f or46_c to-4_c) on Electro-Mechanical (E/M) and Direct Digital Controller (DDC). S 2-in. (51mm) disposable filters on all units. S High capacity refrigerant filter drier and suction line accumulator on each circuit. S High pressure switch, loss of charge switch and freeze protection adds greater unit reliability. 3

4 Unit Type = Packaged Heat Pump MODEL NUMBER NOMENCLATURE J P 0 6 A A 0 B 0 A A Voltage Packaging E = A=Standard J = 208/ B=LTL P = 208/ T = Factory Installed Options See price pages for complete list Cooling Tons 04 = 3 Ton 08 = 7.5 Ton 05 = 4 Ton 09 = 8.5 Ton Outdoor Air Options 06 = 5 Ton 12 = 10 Ton A=None 07 = 6 Ton 14 = 12.5 B=Tempeconow/barorelief Refrig. System Options E=Tempeconow/barorelief&CO 2 H = Enthalpy econo w/ baro relief A = One---Stage Cooling Models L = Enthalpy econo w/ baro relief & CO 2 D = Two--- Stage Cooling Models Q = Motorized 2 pos damper Heat Level (Field---installed electric heaters available Indoor Fan Options 000 = No Heat 0 = Electric Drive X13 Motor ( ) 1 = Standard static option --- Belt Drive Coil Options (Outdoor --- Indoor --- Hail Guard) 2 = Medium static option --- Belt Drive A = Al/Cu ---Al/Cu 3 = High static option --- Belt Drive B = Precoat Al/Cu --- Al/Cu C = High static option with High Eff. Motor C = E --- coat Al/Cu --- Al/Cu (Size 14 only) D = E --- coat Al/Cu --- E --- coat Al/Cu E = Cu/Cu --- Al/Cu F = Cu/Cu --- Cu/Cu M = Al/Cu --- Al/Cu --- Louvered Hail guards N = Precoat Al/Cu --- Al/Cu --- Louvered Hail Guards P = E coat Al/Cu --- Al/Cu --- Louvered Hail Guards Q = E coat Al/Cu --- E coat Al/Cu --- Louvered Hail Guards R = Cu/Cu --- Al/Cu --- Louvered Hail Guards S = Cu/Cu --- Cu/Cu --- Louvered Hail Guards 4

5 FACTORY OPTIONS AND/OR ACCESSORIES Table 1 FACTORY-INSTALLED OPTIONS AND FIELD-INSTALLED ACCESSORIES CATEGORY ITEM FACTORY INSTALLED OPTION FIELD INSTALLED ACCESSORY Thru --- the --- base electrical connections X X Cabinet Disconnect Switch Bracket (Available 14 size only) X Supply Duct Cover (Available 14 size only) X Cu/Cu indoor and/or outdoor coils X Coil Options Pre--- coated outdoor coils X Premium, E--- coated outdoor coils X Condenser Protection Condenser coil hail guard (louvered design) X X Thermostats, temperature sensors, and subbases X RTU Open Multi---protocol controller X Controls Smoke detector (supply and/or return air) X Time Guard II compressor delay control circuit X Phase Monitor X Economizers & Outdoor Air Dampers Economizer Sensors & IAQ Devices Electric Heat Indoor Motor & Drive EconoMi$er IV (for electro--- mechanical controlled RTUs) X X EconoMi$er2 (for DDC controlled RTUs) X X Motorized 2 position outdoor air damper X X Manual outdoor air damper (25% and 50%) X Barometric relief 1 X X Power exhaust X Single dry bulb temperature sensors 2 X X Differential dry bulb temperature sensors 2 X Single enthalpy sensors 2 X X Differential enthalpy sensors 2 X CO 2 sensor (wall, duct, or unit mounted) 2 X X Electric Resistance Heaters X Single Point Kit X Multiple motor and belt drive packages X Electric Drive, X13, 5--- speed/torque ( ton) X Low Ambient Control Motormaster head pressure controller 3 X Convenience outlet (powered) X Power Convenience outlet (unpowered) X Options Non--- fused disconnect X Roof curb in. (356mm) X Roof Curbs Roof curb in. (610mm) X NOTES: 1. Included with economizer. 2. Sensors for optimizing economizer. 3. See application data for assistance. 5

6 FACTORY OPTIONS AND/OR ACCESSORIES (cont.) Economizer (dry bulb or enthalpy) Convenience Outlet (powered or un -powered) Economizers save money. They bring in fresh, outside air for ventilation; and provide cool, outside air to cool your building. This is the preferred method of low ambient cooling. When coupled to CO 2 sensors, Economizers can provide even more savings by coupling the ventilation air to only that amount required. Economizers are available, installed and tested by the factory, with either enthalpy or dry bulb temperature inputs. There are also models for electromechanical as well as direct digital controllers. Additional sensors are available as accessories to optimize the economizers. Economizers include gravity controlled, barometric relief which equalizes building pressure and ambient air pressures. This can be a cost effective solution to prevent building pressurization. CO 2 Sensor Improves productivity and saves money by working with the economizer to intake only the correct amount of outside air for ventilation. As occupants fill your building, the CO 2 sensor detects their presence through increasing CO 2 levels, and opens the economizer appropriately. When the occupants leave, the CO 2 levels decrease, and the sensor appropriately closes the economizer. This intelligent control of the ventilation air, called Demand Control Ventilation (DCV) reduces the overall load on the rooftop, saving money. Smoke Detectors Trust the experts. Smoke detectors make your application safer and your job easier. Bryant smoke detectors immediately shut down the rooftop unit when smoke is detected. They are available, installed by the factory, for supply air, return air, or both. Louvered Hail Guards Sleek, louvered panels protect the condenser coil from hail damage, foreign objects, and incidental contact. Lower service bills by including a convenience outlet in your specification. Bryant will install this service feature at our factory, powered. Provides a convenient, 15 amp, 115V GFCI receptacle. Non -fused Disconnect This OSHA-compliant, factory-installed, safety switch allows a service technician to locally secure power to the rooftop. Power Exhaust Pressure Relief Superior internal building pressure control. This field-installed accessory may eliminate the need for costly, external pressure control fans. RTU Open, Multi -protocol Controller Connect the rooftop to an existing BAS without needing complicated translators or adapter modules using the RTU Open controller. This new controller speaks the 4 most common building automation system languages (Bacnet, Modbus, N2, and Lonworks). Use this controller when you have an existing BAS. Time Guard II Control Circuit This accessory protects your compressor by preventing short -cycling in the event of some other failure, prevents the compressor from restarting for 30 seconds after stopping. Not required with RTU Open or authorized commercial thermostats. Motorized 2 -Position Damper The new Bryant 2-position, motorized outdoor air damper admits up to 100% outside air. Using reliable, gear-driven technology, the 2-position damper opens to allow ventilation air and closes when the rooftop stops, stopping unwanted infiltration. 6

7 FACTORY OPTIONS AND/OR ACCESSORIES (cont.) Manual OA Damper Thru -the -Base Connections Manual outdoor air dampers are an economical way to bring in ventilation air. The dampers are available in 25% and 50% versions. Motormaster Head Pressure Controller The Motormaster motor controller is a low ambient, head pressure controller kit that is designed to maintain the unit s condenser head pressure during periods of low ambient cooling operation. This device should be used as an alternative to economizer free cooling not when economizer usage is either not appropriate or desired. The Motormaster will either cycle the outdoor fan motors or operate them at reduced speed to maintain the unit operation, depending on the model. Alternate Motors and Drives Some applications need larger horsepower motors, some need more airflow, and some need both. Regardless of the case, your Bryant expert has a factory installed combination to meet your application. A wide selection of motors and pulleys (drives) are available, factory installed, to handle nearly any application. Thru-the -base connections, available as either an accessory or as a factory option, are necessary to ensure proper connection and seal when routing wire and piping through the rooftop s basepan and curb. These couplings eliminate roof penetration and should be considered for gas lines, main power lines, as well as control power. Disconnect Switch Bracket (14 size only) Provides a pre-engineered and sized mounting bracket for applications requiring a unit mounted fused disconnect of greater than 100 amps. Bracket assures that no damage will occur to coils when mounting with screws and other fasteners. Supply Duct Cover (14 size only) This supply duct cover is required when field converting the factory standard vertical duct supply to horizontal duct supply configuration. One is required per unit. (14 size only). Electric Heaters Bryant offers a full line of field-installed accessory heaters. The heaters are very easy to use and install. All are pre-engineered and certified. 7

8 Table 2 AHRI COOLING RATING TABLES COOLING MODE * NOMINAL CAPACITY NET COOLING CAPACITY TOTAL POWER SEER EER IEER (TONS) (BTUH) (kw) 04A 3 37, * N/A 05A 4 47, * N/A 06A 5 61, * N/A 07A 6 70, N/A D , N/A D , N/A D , N/A D , N/A NOTE: All AHRI ratings are based on 230, 460 and 575 volt. * Electric Drive (direct drive) X13 5 speed/torque motor. SEER rating is 13.0 for belt drive. NA Not applicable HEATING MODE HEATING, LOW AT 17_F ( --- 8_C) AMBIENT HEATING, AT 47_F (8_C) AMBIENT * HSPF CAPACITY CAPACITY COP (BTUH) (BTUH) COP 04A ,200 N/A 35,600 N/A 05A ,600 N/A 45,500 N/A 06A ,200 N/A 58,000 N/A 07A N/A 34, , D N/A 48, , D N/A 54, , D N/A 62, , D N/A 76, , LEGEND AHRI --- Air Conditioning, Heating and Refrigeration Institute ASHRAE --- American Society of Heating, Refrigerating and Air Conditioning, Inc. COP --- Coefficient of Performance EER --- Energy Efficiency Ratio HSPF --- Heating Seasonal Performance Factor IEER --- Integrated Energy Efficiency Ratio SEER --- Seasonal Energy Efficiency Ratio NOTES: 1. Rated and certified under AHRI Standard 210/240 or 340/360, as appropriate. 2. Ratings are based on: Cooling Standard: 80_F (27_C) db, 67_F (19_C) wb indoor air temp and 95_F db outdoor air temp. IEER Standard: A measure that expresses cooling part--- load EER efficiency for commercial unitary air conditioning and heat pump equipment on the basis of weighted operation at variable load capacities. 3. All units comply with ASHRAE 90.1 Energy Standard for minimum SEER and EER requirements. Use of the AHRI Certified TM Mark indicates a manufacturer s participation in the program For verification of certification for individual products, go to 8

9 Table 3 MINIMUM - MAXIMUM AIRFLOWS ELECTRIC HEAT UNIT COOLING ELECTRIC HEATERS MINIMUM MAXIMUM MINIMUM MAXIMUM * * * * * * 3750 * * 4250 * * *Minimum electric heat CFM exceptions : UNIT UNIT VOLTAGE HEATER kw *08 * Table 4 SOUND PERFORMANCE TABLE UNIT CONFIGURATION REQUIRED MINIMUM CFM Horizontal or Vertical * OUTDOOR SOUND (db) A --- WEIGHTED A A A A D D D D LEGEND db --- Decibel NOTES: 1. Outdoor sound data is measured in accordance with AHRI standard Measurements are expressed in terms of sound power. Do not compare these values to sound pressure values because sound pressure accounts for specific environmental factors which do not match individual applications. Sound power values are independent of the environment and therefore more accurate. 3. A---weighted sound ratings filter out very high and very low frequencies, to better approximate the response of an average human ear. A---weighted measurements for Bryant units are taken in accordance with

10 Table 5 PHYSICAL DATA (COOLING) 3-6 TONS *04A *05A *06A *07A Refrigeration System #Circuits/#Comp./Type 1/1/Scroll 1/1/Scroll 1/1/Scroll 1/1/Scroll Puronr refrig. (R---410A) charge per circuit A/B (lbs---oz) / / / / --- Metering Device Acutrol Acutrol Acutrol Acutrol High pressure Trip / Reset (psig) 630 / / / / 505 Loss of Charge Pressure Trip / Reset (psig) 27 / / / / 44 Compressor Capacity Staging (%) 100% 100% 100% 100% Evap. Coil Material---Tube/Fin Cu/Al Cu / Al Cu / Al Cu / Al Coil type 3/8--- in RTPF 3/8 --- in RTPF 3/8 --- in RTPF 3/8 --- in RTPF Rows / FPI 3 / 15 3/15 4/ 15 4/ 15 Total Face Area (ft 2 ) Condensate Drain Conn. Size 3/4---in 3/4 --- in 3/4 --- in 3/4 --- in Evap. Fan and Motor Standard Static 1phase Motor Qty / Drive Type 1/Direct 1/Direct 1/Direct N/A Max BHP RPM Range Motor Frame Size Fan Qty / Type 1/Centrifugal 1/Centrifugal 1/Centrifugal --- Fan Diameter x Length (in) 10 x x x Standard Static 3phase Motor Qty / Drive Type 1/Direct 1/Direct 1/Direct 1/Belt Max BHP RPM Range Motor Frame Size Fan Qty / Type 1/Centrifugal 1/Centrifugal 1/Centrifugal 1/Centrifugal Fan Diameter x Length (in) 10 x x x x 10 Medium Static 3phase Motor Qty / Drive Type 1/Belt 1/Belt 1/Belt 1/Belt Max BHP RPM Range Motor Frame Size Fan Qty / Type 1/Centrifugal 1/Centrifugal 1/Centrifugal 1/Centrifugal Fan Diameter x Length (in) 10 x x x x 10 High Static 3phase Motor Qty / Drive Type 1/Belt 1/Belt 1/Belt 1/Belt Max BHP RPM Range Motor Frame Size Fan Qty / Type 1/Centrifugal 1/Centrifugal 1/Centrifugal 1/Centrifugal Fan Diameter x Length (in) 10 x x x x 10 Cond. Coil Cond. fan / motor Filters Material---Tube/Fin Cu/Al Cu / Al Cu / Al Cu / Al Coil type 3/8--- in RTPF 3/8 --- in RTPF 3/8 --- in RTPF 3/8 --- in RTPF Rows / FPI 2 / 17 2/17 2/17 2/17 Total Face Area (ft 2 ) Qty / Motor Drive Type 1 / Direct 1/Direct 1/Direct 1/Direct Motor HP / RPM 1/8 / 825 1/4 / /4 / /4 / 1100 Fan diameter (in) RAFilter#/Size(in) 2/16x25x2 2/16x25x2 4/16x16x2 4/16x16x2 OA inlet screen # / Size (in) 1/20x24x1 1/20x24x1 1/20x24x1 1/20x24x1 10

11 Table 6 PHYSICAL DATA (COOLING) TONS *08D *09D *12D *14D Refrigeration System #Circuits/#Comp./Type 2/2/Scroll 2/2/Scroll 2/2/Scroll 2/2/Scroll Puronr refrig. (R---410A) charge per circuit A/B (lbs---oz) / / / / Metering Device Acutrol Acutrol Acutrol Acutrol High pressure Trip / Reset (psig) 630 / / / / 505 Loss of Charge Pressure Trip / Reset (psig) 27 / / / / 44 Compressor Capacity Staging (%) 50% / 100% 50% / 100% 50% / 100% 50% / 100% Evap. Coil Material---Tube/Fin Cu/Al Cu / Al Cu / Al Cu / Al Coil type 3/8--- in RTPF 3/8 --- in RTPF 3/8 --- in RTPF 3/8 --- in RTPF Rows / FPI 3 / 15 4/15 4/15 3/15 Total Face Area (ft 2 ) Condensate Drain Conn. Size 3/4 3/4 3/4 3/4 Evap. Fan and Motor Standard Static 3phase Motor Qty / Drive Type 1/Belt 1/Belt 1/Belt 1/Belt Max BHP RPM Range Motor Frame Size Fan Qty / Type 1/Centrifugal 1/Centrifugal 1/Centrifugal 1/Centrifugal Fan Diameter x Length (in) 15 x x x x 18 Medium Static 3phase High Static 3phase High Static High Eff. 3phase* Motor Qty / Drive Type 1/Belt 1/Belt 1/Belt 1/Belt Max BHP RPM Range Motor Frame Size Fan Qty / Type 1/Centrifugal 1/Centrifugal 1/Centrifugal 1/Centrifugal Fan Diameter x Length (in) 15 x x x x 18 Motor Qty / Drive Type 1/Belt 1/Belt 1/Belt 1/Belt Max BHP RPM Range Motor Frame Size S184T Fan Qty / Type 1/Centrifugal 1/Centrifugal 1/Centrifugal 1/Centrifugal Fan Diameter x Length (in) 15 x x x x 18 Motor Qty / Drive Type n/a n/a n/a 1/Belt Max BHP n/a n/a n/a 6.1 RPM Range n/a n/a n/a Motor Frame Size n/a n/a n/a S184T Fan Qty / Type n/a n/a n/a 1/Centrifugal Fan Diameter x Length (in) n/a n/a n/a 18 x 18 Cond. Coil Material---Tube/Fin Cu/Al Cu / Al Cu / Al Cu / Al Coil type 3/8--- in RTPF 3/8 --- in RTPF 3/8 --- in RTPF 3/8 --- in RTPF Rows / FPI 2 / 17 2/17 3/17 2/17 Total Face Area (ft 2 ) Cond. fan / motor Qty / Motor Drive Type 2 / Direct 2/Direct 1 / Direct 3 / Direct Motor HP / RPM 1/4 / /4 / / /4 / 1100 Fan diameter (in) Filters RA Filter # / Size (in) 4 / 20 x 20 x 2 4/20x20x2 4/20x20x2 6/18x24x2 OA inlet screen # / Size (in) 1/20x24x1 1/20x24x1 1/20x24x1 2/24x27x1 (Vertical) 1/30x39x1 (Horizontal) * Section 313 of the Energy Independence and Security Act of 2007 (EISA) mandates that the efficiency of general purpose motors we use in our Light Commercial Rooftops rated at 5.0 HP and larger be increased on or after December 19, We will offer both high and standard efficient motors until inventory is depleted and then shift over solely to the high efficient motors only. 11

12 Table 7 ELECTRIC HEAT - ELECTRICAL DATA UNIT *04 NOM. V --- PH --- HZ 208/ / IFM TYPE DD DD BD BD DD BD BD ELECTRIC HEATER PART NUMBER CRHEATERXXXXXX NOM PWR (kw) APP PWR (kw) SINGLE POINT KIT PART NUMBER CRSINGLEXXXXXX WITHOUT C.O. or UNPWRD C.O. WITH PWRD C.O. 3 TONS WITHOUT P.E. WITH P.E. WITHOUT P.E. WITH P.E. 101A / A00 037A00 037A00 040A00 102A / A00 040A00 040A00 040A00 103B / A00 040A00 040A00 040A00 104B / A00 040A00 040A00 040A00 102A00,102A / A00 041A00 041A00 041A00 101A / A / A00 103B / A00 037A00 037A00 037A00 104B / A00 037A00 038A00 038A00 105A / A00 038A00 038A00 038A00 101A / A / B / A00 037A00 037A00 104B / A00 037A00 037A00 038A00 105A / A00 038A00 038A00 038A00 101A / A / B / A00 037A00 037A00 104B / A00 037A00 037A00 038A00 105A / A00 038A00 038A00 038A00 106A A A A A A A A A A A A No Single Point Kit required LEGEND APP PWR / 230V / 460V / 575V BD --- Belt drive motor C.O. --- Convenience outlet DD --- Electric Drive X13 5 speed/torque motor FLA --- Full load amps IFM --- Indoor fan motor NOM PWR V / 480V / 600V P.E. --- Power exhaust PWRD --- Powered convenience outlet UNPWRD --- Unpowered convenience outlet 12

13 Table 7 - (cont.) ELECTRIC HEAT - ELECTRICAL DATA 4 TONS UNIT *05 NOM. V --- PH --- HZ 208/ / IFM TYPE DD DD BD BD DD BD BD ELECTRIC HEATER PART NUMBER CRHEATERXXXXXX NOM PWR (kw) APP PWR (kw) SINGLE POINT KIT PART NUMBER CRSINGLEXXXXXX WITHOUT C.O. or UNPWRD C.O. WITH PWRD C.O. WITHOUT P.E. WITH P.E. WITHOUT P.E. WITH P.E. 101A / A00 040A00 040A00 040A00 103B / A00 040A00 040A00 040A00 102A00,102A / A00 041A00 041A00 041A00 103B00,103B / A00 041A00 041A00 041A00 104B00,104B / A00 041A00 041A00 041A00 102A / A00 103B / A00 037A00 037A00 037A00 105A / A00 038A00 038A00 038A00 104B00,104B / A00 039A00 039A00 039A00 102A / B / A00 037A00 037A00 105A / A00 038A00 038A00 038A00 104B00,104B / A00 039A00 039A00 039A00 102A / B / A00 037A00 037A00 105A / A00 038A00 038A00 038A00 104B00,104B / A00 039A00 039A00 039A00 106A A A A00,108A A00 037A00 037A00 037A00 106A A A A00,108A A00 037A00 037A00 037A00 106A A A A00,108A A00 037A00 037A00 037A No Single Point Kit required LEGEND APP PWR / 230V / 460V / 575V BD --- Belt drive motor C.O. --- Convenience outlet DD --- Electric Drive X13 5 speed/torque motor FLA --- Full load amps IFM --- Indoor fan motor NOM PWR V / 480V / 600V P.E. --- Power exhaust PWRD --- Powered convenience outlet UNPWRD --- Unpowered convenience outlet 13

14 Table 7 - (cont.) ELECTRIC HEAT - ELECTRICAL DATA 5 TONS UNIT *06 NOM. V --- PH --- HZ 208/ / IFM TYPE DD DD BD BD DD BD BD ELECTRIC HEATER PART NUMBER CRHEATERXXXXXX NOM PWR (kw) APP PWR (kw) SINGLE POINT KIT PART NUMBER CRSINGLEXXXXXX WITHOUT C.O. or UNPWRD C.O. WITH PWRD C.O. WITHOUT P.E. WITH P.E. WITHOUT P.E. WITH P.E. 102A / A00 040A00 040A00 040A00 103B / A00 040A00 040A00 040A00 102A00,102A / A00 041A00 041A00 041A00 103B00,103B / A00 041A00 041A00 041A00 104B00,104B / A00 041A00 041A00 041A00 102A / A00 037A00 104B / A00 038A00 038A00 038A00 105A / A00 038A00 038A00 038A00 104B00,104B / A00 039A00 039A00 039A00 104B00,105A / A00 039A00 039A00 039A00 102A / A00 104B / A00 037A00 038A00 038A00 105A / A00 038A00 038A00 038A00 104B00,104B / A00 039A00 039A00 039A00 104B00,105A / A00 039A00 039A00 039A00 102A / A00 037A00 104B / A00 038A00 038A00 038A00 105A / A00 038A00 038A00 038A00 104B00,104B / A00 039A00 039A00 039A00 104B00,105A / A00 039A00 039A00 039A00 106A A A A00,108A A00 037A00 037A00 037A00 108A00,109A A00 037A00 037A00 037A00 106A A A A00,108A A00 037A00 037A00 037A00 108A00,109A A00 037A00 037A00 037A00 106A A A A00,108A A00 037A00 037A00 037A00 108A00,109A A00 037A00 037A00 037A No Single Point Kit required LEGEND APP PWR / 230V / 460V / 575V BD --- Belt drive motor C.O. --- Convenience outlet DD --- Electric Drive X13 5 speed/torque motor FLA --- Full load amps IFM --- Indoor fan motor NOM PWR V / 480V / 600V P.E. --- Power exhaust PWRD --- Powered convenience outlet UNPWRD --- Unpowered convenience outlet 14

15 Table 7 - (cont.) ELECTRIC HEAT - ELECTRICAL DATA 6 TONS UNIT *07 NOM. V --- PH --- HZ 208/ IFM TYPE ELECTRIC HEATER PART NUMBER CRHEATERXXXXXX NOM PWR (kw) APP PWR (kw) SINGLE POINT KIT PART NUMBER CRSINGLEXXXXXX WITHOUT C.O. or UNPWRD C.O. WITH PWRD C.O. WITHOUT P.E. WITH P.E. WITHOUT P.E. WITH P.E. 102A / A00 037A00 037A00 104B / A00 038A00 038A00 038A00 105A / A00 038A00 038A00 038A00 104B00,104B / A00 039A00 039A00 039A00 104B00,105A / A00 039A00 039A00 039A00 102A / A00 037A00 037A00 037A00 104B / A00 038A00 038A00 038A00 105A / A00 038A00 038A00 038A00 104B00,104B / A00 039A00 039A00 039A00 104B00,105A / A00 039A00 039A00 039A00 102A / A00 037A00 037A00 037A00 104B / A00 038A00 038A00 038A00 105A / A00 038A00 038A00 038A00 104B00,104B / A00 039A00 039A00 039A00 104B00,105A / A00 039A00 039A00 039A00 106A A A A00,108A A00 037A00 037A00 037A00 108A00,109A A00 037A00 037A00 037A00 106A A A A00,108A A00 037A00 037A00 037A00 108A00,109A A00 037A00 037A00 037A00 106A A A A00,108A A00 037A00 037A00 037A00 108A00,109A A00 037A00 037A00 037A No Single Point Kit required LEGEND APP PWR / 230V / 460V / 575V C.O. --- Convenience outlet FLA --- Full load amps IFM --- Indoor fan motor NOM PWR V / 480V / 600V P.E. --- Power exhaust PWRD --- Powered convenience outlet UNPWRD --- Unpowered convenience outlet 15

16 Table 7 - (cont.) ELECTRIC HEAT - ELECTRICAL DATA 7.5 TONS UNIT *08 (2---STAGE COOL) NOM. V --- PH --- HZ 208/ IFM TYPE ELECTRIC HEATER PART NUMBER CRHEATERXXXXXX NOM PWR (kw) APP PWR (kw) SINGLE POINT KIT PART NUMBER CRSINGLEXXXXXX WITHOUT C.O. or UNPWRD C.O. WITH PWRD C.O. WITHOUT P.E. WITH P.E. WITHOUT P.E. WITH P.E. 117A / A00 049A00 049A00 049A00 110A / A00 049A00 049A00 049A00 111A / A00 051A00 051A00 051A00 112A / A00 051A00 051A00 051A00 112A00,117A / A00 053A00 053A00 053A00 117A / A00 049A00 049A00 049A00 110A / A00 049A00 049A00 049A00 111A / A00 051A00 051A00 051A00 112A / A00 051A00 051A00 051A00 112A00,117A / A00 053A00 053A00 053A00 117A / A00 049A00 049A00 049A00 110A / A00 049A00 049A00 049A00 111A / A00 051A00 051A00 051A00 112A / A00 051A00 051A00 051A00 112A00,117A / A00 053A00 053A00 053A00 116A A00 047A00 047A00 047A00 113A A00 047A00 047A00 047A00 114A A00 050A00 050A00 050A00 115A A00 050A00 050A00 050A00 114A00,116A A00 052A00 052A00 052A00 116A A00 047A00 047A00 047A00 113A A00 047A00 047A00 047A00 114A A00 050A00 050A00 050A00 115A A00 050A00 050A00 050A00 114A00,116A A00 052A00 052A00 052A00 116A A00 047A00 047A00 047A00 113A A00 047A00 047A00 047A00 114A A00 050A00 050A00 050A00 115A A00 050A00 050A00 050A00 114A00,116A A00 052A00 052A00 052A00 118A A00 047A00 047A00 047A00 119A A00 050A00 050A00 050A00 118A A00 047A00 047A00 047A00 119A A00 050A00 050A00 050A00 118A A00 047A00 047A00 047A00 119A A00 050A00 050A00 050A No Single Point Kit required LEGEND APP PWR / 230V / 460V / 575V C.O. --- Convenience outlet FLA --- Full load amps IFM --- Indoor fan motor NOM PWR V / 480V / 600V P.E. --- Power exhaust PWRD --- Powered convenience outlet UNPWRD --- Unpowered convenience outlet 16

17 Table 7 - (cont.) ELECTRIC HEAT - ELECTRICAL DATA 8.5 TONS UNIT *09 (2---STAGE COOL) NOM. V --- PH --- HZ 208/ IFM TYPE ELECTRIC HEATER PART NUMBER CRHEATERXXXXXX NOM PWR (kw) APP PWR (kw) SINGLE POINT KIT PART NUMBER CRSINGLEXXXXXX WITHOUT C.O. or UNPWRD C.O. WITH PWRD C.O. WITHOUT P.E. WITH P.E. WITHOUT P.E. WITH P.E. 117A / A00 049A00 049A00 049A00 110A / A00 049A00 049A00 049A00 111A / A00 051A00 051A00 051A00 112A / A00 051A00 051A00 051A00 112A00,117A / A00 053A00 053A00 053A00 117A / A00 049A00 049A00 049A00 110A / A00 049A00 049A00 049A00 111A / A00 051A00 051A00 051A00 112A / A00 051A00 051A00 051A00 112A00,117A / A00 053A00 053A00 053A00 117A / A00 049A00 049A00 049A00 110A / A00 049A00 049A00 049A00 111A / A00 051A00 051A00 051A00 112A / A00 051A00 051A00 051A00 112A00,117A / A00 053A00 053A00 053A00 116A A00 047A00 047A00 047A00 113A A00 047A00 047A00 047A00 114A A00 050A00 050A00 050A00 115A A00 050A00 050A00 050A00 114A00,116A A00 052A00 052A00 052A00 116A A00 047A00 047A00 047A00 113A A00 047A00 047A00 047A00 114A A00 050A00 050A00 050A00 115A A00 050A00 050A00 050A00 114A00,116A A00 052A00 052A00 052A00 116A A00 047A00 047A00 047A00 113A A00 047A00 047A00 047A00 114A A00 050A00 050A00 050A00 115A A00 050A00 050A00 050A00 114A00,116A A00 052A00 052A00 052A00 118A A00 047A00 047A00 047A00 119A A00 050A00 050A00 050A00 118A A00 047A00 047A00 047A00 119A A00 050A00 050A00 050A00 118A A00 047A00 047A00 047A00 119A A00 050A00 050A00 050A No Single Point Kit required LEGEND APP PWR / 230V / 460V / 575V C.O. --- Convenience outlet FLA --- Full load amps IFM --- Indoor fan motor NOM PWR V / 480V / 600V P.E. --- Power exhaust PWRD --- Powered convenience outlet UNPWRD --- Unpowered convenience outlet 17

18 Table 7 - (cont.) ELECTRIC HEAT - ELECTRICAL DATA 10 TONS UNIT *12 (2---STAGE COOL) NOM. V --- PH --- HZ 208/ IFM TYPE ELECTRIC HEATER PART NUMBER CRHEATERXXXXXX NOM PWR (kw) APP PWR (kw) SINGLE POINT KIT PART NUMBER CRSINGLEXXXXXX WITHOUT C.O. or UNPWRD C.O. WITH PWRD C.O. WITHOUT P.E. WITH P.E. WITHOUT P.E. WITH P.E. 117A / A00 049A00 049A00 049A00 110A / A00 049A00 049A00 049A00 112A / A00 051A00 051A00 051A00 112A00,117A / A00 053A00 053A00 053A00 112A00,110A / A00 053A00 053A00 053A00 117A / A00 049A00 051A00 051A00 110A / A00 049A00 051A00 051A00 112A / A00 051A00 053A00 053A00 112A00,117A / A00 053A00 054A00 054A00 112A00,110A / A00 053A00 054A00 054A00 117A / A00 051A00 051A00 051A00 110A / A00 051A00 051A00 051A00 112A / A00 053A00 053A00 053A00 112A00,117A / A00 054A00 054A00 054A00 112A00,110A / A00 054A00 054A00 054A00 116A A00 047A00 047A00 047A00 113A A00 047A00 047A00 047A00 115A A00 050A00 050A00 050A00 114A00,116A A00 052A00 052A00 052A00 115A00,113A A00 052A00 052A00 052A00 116A A00 047A00 047A00 047A00 113A A00 047A00 047A00 047A00 115A A00 050A00 050A00 050A00 114A00,116A A00 052A00 052A00 052A00 115A00,113A A00 052A00 052A00 052A00 116A A00 047A00 047A00 047A00 113A A00 047A00 047A00 047A00 115A A00 050A00 050A00 050A00 114A00,116A A00 052A00 052A00 052A00 115A00,113A A00 052A00 052A00 052A00 118A A00 047A00 047A00 047A00 119A A00 050A00 050A00 050A00 118A00,119A A00 052A00 052A00 052A00 118A A00 047A00 047A00 047A00 119A A00 050A00 050A00 050A00 118A00,119A A00 052A00 052A00 052A00 118A A00 047A00 047A00 047A00 119A A00 050A00 050A00 050A00 118A00,119A A00 052A00 052A00 052A No Single Point Kit required LEGEND APP PWR / 230V / 460V / 575V C.O. --- Convenience outlet FLA --- Full load amps IFM --- Indoor fan motor NOM PWR V / 480V / 600V P.E. --- Power exhaust PWRD --- Powered convenience outlet UNPWRD --- Unpowered convenience outlet 18

19 Table 7 - (cont.) ELECTRIC HEAT - ELECTRICAL DATA 12.5 TONS UNIT NOM. V --- PH --- HZ IFM TYPE ELECTRIC HEATER PART NUMBER CRHEATERXXXXXX NOM PWR (kw) APP PWR (kw) SINGLE POINT KIT PART NUMBER CRSINGLEXXXXXX WITHOUT C.O. or UNPWRD C.O. WITH PWRD C.O. WITHOUT P.E. WITH P.E. WITHOUT P.E. WITH P.E. 291A / A00 051A00 051A00 051A00 288A00,291A / A00 053A00 053A00 053A00 294A / A00 053A00 053A00 053A00 288A00,294A / A00 054A00 054A00 054A00 291A00,294A / A00 054A00 054A00 054A00 291A / A00 051A00 051A00 051A00 288A00,291A / A00 053A00 053A00 053A00 294A / A00 053A00 053A00 053A00 288A00,294A / A00 054A00 054A00 054A00 291A00,294A / A00 054A00 054A00 054A00 291A / A00 051A00 051A00 051A00 288A00,291A / A00 053A00 053A00 053A00 294A / A00 053A00 053A00 053A00 288A00,294A / A00 054A00 054A00 054A00 291A00,294A / A00 054A00 054A00 054A00 291A / A00 051A00 051A00 051A00 288A00,291A / A00 053A00 053A00 053A A / A00 053A00 053A00 053A00 High Eff. 288A00,294A / A00 054A00 054A00 054A00 291A00,294A / A00 054A00 054A00 054A00 292A A00 047A00 047A00 047A00 289A00,292A A00 050A00 050A00 050A00 295A A00 050A00 050A00 050A00 289A00,295A A00 052A00 052A00 052A00 292A00,295A A00 052A00 052A00 052A00 292A A00 047A00 047A00 047A00 289A00,292A A00 050A00 050A00 050A00 295A A00 050A00 050A00 050A00 289A00,295A A00 052A00 052A00 052A00 292A00,295A A00 052A00 052A00 052A00 292A A00 050A00 050A00 050A00 289A00,292A A00 050A00 050A00 050A00 295A A00 050A00 050A00 050A00 289A00,295A A00 052A00 052A00 052A00 292A00,295A A00 052A00 052A00 052A00 292A A00 050A00 050A00 050A00 289A00,292A A00 050A00 050A00 050A A A00 050A00 050A00 050A00 High Eff. 289A00,295A A00 052A00 052A00 052A00 292A00,295A A00 052A00 052A00 052A No Single Point Kit required LEGEND APP PWR / 230V / 460V / 575V C.O. --- Convenience outlet FLA --- Full load amps IFM --- Indoor fan motor NOM PWR V / 480V / 600V P.E. --- Power exhaust PWRD --- Powered convenience outlet UNPWRD --- Unpowered convenience outlet *14 (2---STAGE COOL) 208/

20 Table 7 - (cont.) ELECTRIC HEAT - ELECTRICAL DATA 12.5 TONS UNIT *14 (2---STAGE COOL) NOM. V --- PH --- HZ IFM TYPE --- High Eff. ELECTRIC HEATER PART NUMBER CRHEATERXXXXXX NOM PWR (kw) APP PWR (kw) SINGLE POINT KIT PART NUMBER CRSINGLEXXXXXX WITHOUT C.O. or UNPWRD C.O. WITH PWRD C.O. WITHOUT P.E. WITH P.E. WITHOUT P.E. WITH P.E. 293A A00 047A00 047A00 047AAA 290A00,293A A00 047A00 047A00 050A00 296A A00 050A00 050A00 050A00 290A00,296A A00 052A00 052A00 052A00 293A00,296A A00 052A00 052A00 052A00 293A A00 047A00 047A00 047A00 290A00,293A A00 047A00 047A00 050A00 296A A00 050A00 050A00 050A00 290A00,296A A00 052A00 052A00 052A00 293A00,296A A00 052A00 052A00 052A00 293A A00 047A00 047A00 047A00 290A00,293A A00 050A00 050A00 050A00 296A A00 050A00 050A00 050A00 290A00,296A A00 052A00 052A00 052A00 293A00,296A A00 052A00 052A00 052A00 293A A00 047A00 047A00 047A00 290A00,293A A00 050A00 050A00 050A00 296A A00 050A00 050A00 050A00 290A00,296A A00 052A00 052A00 052A00 293A00,296A A00 052A00 052A00 052A No Single Point Kit required LEGEND APP PWR / 230V / 460V / 575V C.O. --- Convenience outlet FLA --- Full load amps IFM --- Indoor fan motor NOM PWR V / 480V / 600V P.E. --- Power exhaust PWRD --- Powered convenience outlet UNPWRD --- Unpowered convenience outlet 20

21 WEIGHTS & DIMENSIONS Fig. 1 - Dimensions * C

22 WEIGHTS & DIMENSIONS (cont.) Fig. 2 - Dimensions * C09019 C D B A Fig. 3 - Service Clearance C08337 LOC DIMENSION CONDITION in. (1219 mm) Unit disconnect is mounted on panel A in. (457 mm) No disconnect, convenience outlet option 18---in. (457 mm) Recommended service clearance 12---in. (305 mm) Minimum clearance in. (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall) B in. (914 mm) Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass) Special Check for sources of flue products within 10---ft of unit fresh air intake hood C 36---in. (914 mm) Side condensate drain is used 18---in. (457 mm) Minimum clearance D in. (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall, another unit) in. (914 mm) Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass) 22

23 WEIGHTS & DIMENSIONS (cont.) ROOFCURB ACCESSORY CRRFCURB001A01 CRRFCURB002A [356] 2-0 [610] UNIT SIZE *04-07A CONNECTOR PKG. ACCY. B C DALT DRAIN HOLE CRBTMPWR001A / / 4 3 / 4 [19] NPT CRBTMPWR003A01 [551] [406] [44.5] 1 1 / 4 [31.7] POWER CONTROL ACCESSORY POWER 1 / 2 [12.7] NPT 1 / 2 [12.7] NPT Typical corner fastening device Fig. 4 - Curb Dimensions * C

24 WEIGHTS & DIMENSIONS (cont.) Vertical Connections / Economizer Fig. 5 - Dimensions * C08679A 24

25 WEIGHTS & DIMENSIONS (cont.) Horizontal Connections / Economizer Fig. 6 - Dimensions * C08679B 25

26 WEIGHTS & DIMENSIONS (cont.) Fig. 7 - Dimensions * C08680 C D B A Fig. 8 - Service Clearance C10577 LOC DIMENSION CONDITION in. (1219 mm) Unit disconnect is mounted on panel A in. (457 mm) No disconnect, convenience outlet option 18---in. (457 mm) Recommended service clearance 12---in. (305 mm) Minimum clearance in. (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall) B in. (914 mm) Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass) Special Check for sources of flue products within 10---ft of unit fresh air intake hood C 36---in. (914 mm) Side condensate drain is used 18---in. (457 mm) Minimum clearance D in. (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall, another unit) in. (914 mm) Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass) 26

27 WEIGHTS & DIMENSIONS (cont.) ROOFCURB ACCESSORY CRRFCURB003A01 CRRFCURB004A [356] 2-0 [610] UNIT SIZE 08, 09 Typical corner fastening device Fig. 9 - Curb Dimensions * C

28 WEIGHTS & DIMENSIONS (cont.) Vertical Connections / Economizer Fig Dimensions * 12 C09563A 28

29 WEIGHTS & DIMENSIONS (cont.) Horizontal Connections / Economizer Fig Dimensions * 12 C09563B 29

30 WEIGHTS & DIMENSIONS (cont.) Fig Dimensions * 12 C09564A C D B A Fig Service Clearance C08337 LOC DIMENSION CONDITION in. (1219 mm) Unit disconnect is mounted on panel A in. (457 mm) No disconnect, convenience outlet option 18---in. (457 mm) Recommended service clearance 12---in. (305 mm) Minimum clearance in. (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall) B in. (914 mm) Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass) Special Check for sources of flue products within 10---ft of unit fresh air intake hood C 36---in. (914 mm) Side condensate drain is used 18---in. (457 mm) Minimum clearance D in. (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall, another unit) in. (914 mm) Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass) 30

31 WEIGHTS & DIMENSIONS (cont.) ROOFCURB ACCESSORY CRRFCURB003A01 CRRFCURB004A [356] 2-0 [610] UNIT SIZE *12D Typical corner fastening device Fig Curb Dimensions * 12 C

32 WEIGHTS & DIMENSIONS (cont.) Fig Dimensions * 14 C09895A 32

33 WEIGHTS & DIMENSIONS (cont.) Fig Dimensions * 14 C09895B 33

34 WEIGHTS & DIMENSIONS (cont.) Fig Dimensions * 14 C10429 C D B A Fig Service Clearance C10578 LOC DIMENSION CONDITION in. (1219 mm) Unit disconnect is mounted on panel A in. (457 mm) No disconnect, convenience outlet option 18---in. (457 mm) Recommended service clearance 12---in. (305 mm) Minimum clearance in. (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall) B in. (914 mm) Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass) Special Check for sources of flue products within 10---ft of unit fresh air intake hood C 36---in. (914 mm) Side condensate drain is used 18---in. (457 mm) Minimum clearance D in. (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall, another unit) in. (914 mm) Surface behind servicer is electrically non--- conductive (e.g., wood, fiberglass) 34

35 WEIGHTS & DIMENSIONS (cont.) Fig Curb Dimensions * 14 C

36 OPTION / ACCESSORY WEIGHTS OPTION / ACCESSORY WEIGHTS OPTION / ACCESSORY lb kg lb kg lb kg lb kg lb kg lb kg lb kg lb kg Power Exhaust --- vertical Power Exhaust --- horizontal EconoMi$er (IV or 2) Two Position damper Manual Dampers Hail Guard (louvered) Cu/Cu Condenser Coil Cu/Cu Cond. & Evaporator Coils Roof Curb (14---in. curb) Roof Curb (24---in. curb) CO 2 sensor Electric Heater Single Point Kit Optional Indoor Motor / Drive Motormaster Controller Return Smoke Detector Supply Smoke Detector Non---Fused Disconnect Powered Convenience outlet Non---Powered Convenience outlet Enthalpy Sensor Differential Enthalpy Sensor NOTE: Where multiple variations are available, the heaviest combination is listed. 36

37 APPLICATION / SELECTION DATA Min operating ambient temp (cooling): Sizing a rooftop In mechanical cooling mode, your Bryant rooftop can safely operate down to an outdoor ambient temperature of 25_F (-4_C). It is possible to provide cooling at lower outdoor ambient temperatures by using less outside air, economizers, and/or accessory low ambient kits. Max operating ambient temp (cooling): The maximum operating ambient temperature for cooling mode is 115_F (46_C). While cooling operation above 115_F (46_C) may be possible, it could cause either a reduction in performance, reliability, or a protective action by the unit s internal safety devices. Min and max airflow (cooling mode): To maintain safe and reliable operation of your rooftop, operate within the cooling airflow limits. Operating above the max may cause blow-off, undesired airflow noise, or airflow related problems with the rooftop unit. Operating below the min may cause problems with coil freeze-up. Airflow: All units are draw-though in cooling mode. Outdoor air application strategies: Economizers reduce operating expenses and compressor run time by providing a free source of cooling and a means of ventilation to match application changing needs. In fact, they should be considered for most applications. Also, consider the various economizer control methods and their benefits, as well as sensors required to accomplish your application goals. Please contact your local Bryant representative for assistance. Motor limits, Brake horsepower (BHP): Due to Bryant s internal unit design, air path, and specially designed motors, the full horsepower (maximum continuous BHP) band, as listed in this manual, can be used with the utmost confidence. There is no need for extra safety factors, as Bryant s motors are designed and rigorously tested to use the entire, listed BHP range without either nuisance tripping or premature motor failure. Bigger isn t necessarily better. While an air conditioner needs to have enough capacity to meet the load, it doesn t need excess capacity. In fact, having excess capacity typically results in very poor part load performance and humidity control. Using higher design temperatures than ASHRAE recommends for your location, adding safety factors to the calculated load, and rounding up to the next largest unit, are all signs of oversizing air conditioners. Oversizing can cause short -cycling, and short cycling leads to poor humidity control, reduced efficiency, higher utility bills, drastic indoor temperature swings, excessive noise, and increased wear and tear on the air conditioner. Rather than oversizing an air conditioner, wise contractors and engineers right -size or even slightly undersize air conditioners. Correctly sizing an air conditioner controls humidity better; promotes efficiency; reduces utility bills; extends equipment life, and maintains even, comfortable temperatures. Low ambient applications When equipped with a Bryant economizer, your rooftop unit can cool your space by bringing in fresh, cool outside air. In fact, when so equipped, accessory low ambient kit may not be necessary. In low ambient conditions, unless the outdoor air is excessively humid or contaminated, economizer-based free cooling is the preferred less costly and energy conscious method. In low ambient applications where outside air might not be desired (such as contaminated or excessively humid outdoor environments), your Bryant rooftop can operate at ambient temperatures down to -20_F (-29_C) using the recommended accessory Motormaster low ambient controller. Application / Selection Option Selection software by Bryant saves time by calculating performance in the selection process. Contact your Bryant sales representative for assistance. 37