48PD05---06 Displacement Ventilation or Single Zone Variable Airflow Rooftop Units Single Package, Electric Cool, Gas Heating with PURONr (R---410A) Refrigerant and COMFORTLink™ Controls Product Data Copyright 2010 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 06/10 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
TABLE OF CONTENTS GAS HEATING CAPACITIES AND EFFICIENCIES . . . . . . . 6 S Evaporator fan motor system with high performance belt drives and variable speed motors from 20% to 100% S Internally protected, shaft down totally enclosed condenser motors S 2 inch filter standard, field convertible to 4 inch capability S 24 volt control system with resettable circuit breakers S Induced draft combustion (gas units) S Redundant gas valves with up to two stages of heating S ENERGY STAR qualified PHYSICAL DATA . .
UNIT SUMMARY There are two key elements that separate a Centurion PD unit from other Centurion units; the use of a variable speed fan and a modulating compressor. The modulating compressor allows the fan speed to slow down without the refrigerant coil freezing during low load, and also allows for variable supply air temperatures. In general, a space temperature input is used to control the airflow and a supply air temperature input is used to control the compressor load.
MODEL NUMBER NOMENCLATURE 48PD D C 06 A A A 6 --- --- BB Product Series 48PD --- Single Packaged Rooftop Unit with PURONR Gas Heat,Variable capacity compressor and variable speed indoor fan FIOP Codes Not Used Gas Heat Options** D --- Low Heat with Standard Heat Exchanger E --- Medium Heat with Standard Heat Exchanger F --- High Heat with Standard Heat Exchanger L --- Low Heat Stainless Steel Heat Exchanger M --- Medium Heat Stainless Steel Heat Exchanger N --- High Heat with Stainless Steel He
AHRI CAPACITY RATINGS UNIT 48PD NOMINAL CAPACITY (Tons)* COOLING CAPACITY (MBtuh) SEER EER RATED CFM 05 06 4 5 47,500 58,500 15.2 14.65 12.55 12.25 1,600 1,750 SOUND RATING (dB) 72 78 NOTES: 1. Tested in accordance with AHRI Standards 210/240. 2. Ratings are net values, reflecting the effects of circulating fan heat. 3. Ratings are based on: Cooling Standard: 80 F db, 67 F wb indoor entering---air temperature and 95 F db air entering outdoor unit. 4.
GAS HEATING CAPACITIES AND EFFICIENCIES Vertical and Horizontal Supply Units with Natural Gas (Three Phase) 48PD Standard Stainless Steel HEATING INPUT Stage 2 (Btuh) — D05 E05 F05 D06 E06 F06 L05* — M05 N05* L06* M06* N06* 51,000 56,000 75,000 113,000 75,000 113,000 151,000 HEATING INPUT Stage 1 (Btuh) 35,700 39,200 52,500 79,100 52,500 79,100 105,700 OUTPUT CAPACITY Stage 2 (Btuh) 41,300 45,400 60,800 91,500 60,800 91,500 122,300 TEMPERATURE RISE Min --- Max (F) 25 --- 70 25 --- 70 20 --- 60 30 --
PHYSICAL DATA BASE UNIT 48PD NOMINAL CAPACITY (Tons) OPERATING WEIGHT (lb)* Base Unit Economizer Vertical Horizontal Roof Curb 14-in. 24-in. REFRIGERANT SYSTEM Refrigerant Metering Device # Circuits/ # Compressors Charge (lb) High Pressure Switch Cutout (psig) High Pressure Switch Auto Reset (psig) COMPRESSOR Oil Type Oil (oz) CONDENSER COIL Circuit Rows...Fins/in. Face Area (sq ft) CONDENSER FAN Quantity…Diameter (in.
BASE UNIT 48PD GAS HEAT SECTION # of Gas Valves Gas Supply Line Pressure Range (in.wg) Gas Supply Line Pressure Range (PSIG) Manifold Pressure (in.wg) Natural Gas Vertical/Horizontal Liquid Propane Vertical/Horizontal Thermostat Heat Anticipator Setting (amps) Field Gas Connection Size (in.) Natural Gas Low Heat # of burners (total) Rollout switch opens/closes (deg F) Temperature Rise Min --- Max (deg F) Burner Orifice Diameter (in.
FIOP AND ACCESSORY TABLE CATEGORY ITEM Hinged Access Panels Cabinet OPTION* X X X X Thru--- the--- Bottom Connections Gas Copper Fins --- condenser coil X Copper Fins --- evaporator and condenser coil X E--- Coat outdoor coil (Al/Cu) and indoor coil (Al/Cu) X E--- Coat outdoor coil (Al/Cu) X E--- Coat outdoor coil (Cu/Cu) X Pre--- Coated Aluminum condenser fins X Condenser Coil Grille Condenser Protection Dehumidification and IAQ X High Pressure/ Loss of Charge Switch X Low Pressur
ACCESSORY WEIGHT ADDERS OPTION/ACCESSORY WEIGHTS ACCESSORY WEIGHTS 2--- Position Damper 4--- in Filter Capability Barometric Relief Damper CO2 Sensor Cu Condenser and Evaporator Coils Cu Condenser Coils Differential Enthalpy Sensor Economizer Horizontal Economizer Vertical Enthalpy Sensor Fan Status Gas Heat --- Low Gas Heat --- Medium Gas Heat --- High HACR Breaker Hail Guard Manual Damper Non--- Fused Disconnect Non--- Powered Convenience Outlet Plugged Filter Indicator Power Exhaust Powered Convenience O
BASE UNIT DIMENSIONS C08493 11
48PD 05-06 48PD 05-06 ROOF CURB C07313 12
SELECTION PROCEDURE I. S S S S IV. Determine cooling and heating requirements at design conditions. Given the following data: Vertical or horizontal supply/return configuration Evaporator air quantity (CFM) External duct static pressure (in.wg) Electrical characteristics (Volts--Ph--Hz) Cooling . . . Required gross cooling capacity (TC) . . . Gross sensible capacity (SHC) . . . Condenser entering air temperature (OATc) . . . Indoor air (return air) temperature (RATc) S Heating . . .
MAXIMUM COOLING CAPACITY 48PD05 Temp (F) Air Entering Evaporator — Cfm Air Ent 1200 1600 Air Entering Evaporator — Ewb (F) Condenser (Edb) TC SHC 60 BF TC SHC 70 BF TC SHC 75 BF TC SHC 85 BF TC SHC 95 BF TC SHC 105 BF TC SHC 115 BF TC 125 SHC BF 2000 80 76 72 67 62 58 54 80 76 72 67 62 58 54 80 76 72 67 62 58 54 66.6 18.3 0.00 64.4 17.6 0.00 63.2 17.2 0.00 60.6 16.3 0.00 57.9 15.5 0.00 54.8 14.5 0.00 51.3 13.5 0.00 47.4 12.3 0.00 62.4 23.4 0.00 60.3 22.6 0.00 59.1 22.2 0.00 56.
MAXIMUM COOLING CAPACITY (CONT) 48PD06 Temp (F) Air Ent Condenser (Edb) TC SHC 60 BF TC SHC 70 BF TC SHC 75 BF TC SHC 85 BF TC SHC 95 BF TC SHC 105 BF TC SHC 115 BF TC 125 SHC BF 1200 80 83.9 23.0 0.00 81.1 22.1 0.00 79.9 21.7 0.00 76.9 20.8 0.00 73.6 19.7 0.00 69.8 18.6 0.00 65.6 17.3 0.00 60.8 15.9 0.00 72 73.6 35.7 0.17 71.3 34.9 0.16 70.1 34.4 0.16 67.5 33.5 0.15 64.5 32.4 0.15 61.3 31.2 0.15 57.8 30.0 0.15 53.8 28.5 0.15 67 67.9 43.4 0.16 65.8 42.6 0.16 64.7 42.1 0.16 62.2 41.1 0.15 59.5 40.1 0.
FAN PERFORMANCE Vertical Supply/Return 48PD05 (High Heat Units) AIRFLOW (Cfm) 1200 1300 1400 1500 1600 1700 1800 1900 2000 Rpm 520 545 570 596 623 650 677 705 734 0.2 Bhp 0.17 0.20 0.24 0.28 0.32 0.37 0.43 0.50 0.57 Rpm 628 648 668 691 714 737 762 787 813 AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.4 0.6 0.8 Bhp Rpm Bhp Rpm 0.24 723 0.33 811 0.28 739 0.37 823 0.32 756 0.41 837 0.37 775 0.46 853 0.42 795 0.52 870 0.48 816 0.58 889 0.54 838 0.65 909 0.61 861 0.72 929 0.68 884 0.80 951 Bhp 0.41 0.46 0.
FAN PERFORMANCE (CONT) Horizontal Supply/Return 48PD05 (High Heat Units) AIRFLOW (Cfm) 1200 1300 1400 1500 1600 1700 1800 1900 2000 Rpm 456 477 500 524 550 576 604 633 662 0.2 Bhp 0.13 0.16 0.18 0.22 0.26 0.30 0.35 0.41 0.47 Rpm 574 591 610 630 652 675 699 724 750 AVAILABLE EXTERNAL STATIC PRESSURE (in. wg) 0.4 0.6 0.8 Bhp Rpm Bhp Rpm 0.20 675 0.28 766 0.23 688 0.32 776 0.27 703 0.36 788 0.31 720 0.40 802 0.35 739 0.45 819 0.40 759 0.50 836 0.46 781 0.57 856 0.52 804 0.63 876 0.59 828 0.71 898 Bhp 0.
GENERAL NOTES FOR FAN PERFORMANCE DATA TABLES 1. Static pressure losses from accessories and options 4. Extensive motor and drive testing on these units ensures (Humidi-MiZer™ system, economizer, etc.) must be added that the full horsepower range of the motor can be utilized to external static pressure before entering Fan Performance with confidence. Using your fan motors up to the bhp rating table. shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. 2.
INDOOR FAN DATA 48PD Fan Motor and Drive Data --- Vertical Supply/Return 48PD Fan Motor and Drive Data --- Horizontal Supply/Return UNIT SIZE UNIT SIZE Voltage 05 06 208/230 and 460 208/230 and 460 2.4 2.4 LOW STATIC DRIVE OPTION Motor HP Motor Nominal RPM Voltage 05 06 208/230 and 460 208/230 and 460 2.4 2.4 1725 1725 LOW STATIC DRIVE OPTION Motor HP 1725 1725 Maximum Continuous BHP 2.0 2.0 Maximum Continuous BHP 2.0 2.
ELECTRICAL DATA 48PD05--06 Without Powered Convenience Outlet 48PD UNIT SIZE NOMINAL POWER SUPPLY V- PH- HZ VOLTAGE RANGE Min Max COMPRESSOR RLA LRA OFM Qty FLA (ea) COMBUST. FAN MOTOR FLA CONV OUTLET POWER EXH FLA (ea) — 208/230-- 3-- 60 187 253 16.1 110 1 1.0 0.52 None 1.4 05 — 460-- 3-- 60 414 506 7.8 52 1 0.5 0.30 None 0.6 — 208/230-- 3-- 60 187 253 17.9 110 1 1.5 0.52 None 1.4 06 — 460-- 3-- 60 414 506 7.8 52 1 0.8 0.30 None 0.
WIRING DIAGRAMS C10046 21
C10053 22
SEQUENCE OF OPERATION Cooling Mode Using Space Temperature Sensors: T55, T56, or T58 (No Economizer) General The 48PD rooftop units use Puronr (R--410A) refrigerant and ComfortLinkt DDC controls. The PD units are intended to be used in a either a displacement ventilation or a single--zone variable air volume application. The PD unit includes a factory installed variable capacity compressor and variable frequency drive indoor fan motor.
Reset of the Cooling Supply Air Set Point is set by the configuration variables SASP Maximum Reset Down (SASPMAXD) and SASP Maximum Reset Up (SASPMAXU). The SASP Maximum Reset Down (SASPMAXD) configuration variable can be set from --20_ to 0_F and will allow the Supply Air Temperature to be Reset to as much as 20 F below the Cool Supply Air Set Point (SASP).
Cooling Mode Using Space Temperature Sensor T55, T56 or T58 and Humidistat Ventilation Mode Enhanced dehumidification can be provided when a humidistat (HL38MG029, TSTATCCPLH01--B or 33CS2PPRH--01) is connected. When the humidistat contacts close and provide a 24VAC signal, the unit will reset the supply air temperature by one degree F lower than the Supply Air Set Point (SASP) or the current control point if the Supply Air Set Point has already been modified.
APPLICATION DATA Sizing a PD Rooftop Unit Ductwork The Centurion PD rooftop unit utilizes variable compressor loading and variable fan speed to modulate the rooftop unit s capacity from full design capacity down to part--load requirements. Bigger is not necessarily better. While an air conditioner needs to have enough capacity to meet the design loads, excess capacity results in poor part--load performance and humidity control.
Low Ambient Applications In most low ambient cooling situations, the optional Carrier economizer can adequately cool the space by bringing in low temperature outside air. In fact, when an economizer is used, accessory low--ambient kits are typically not necessary. Additionally, unless the outdoor air is excessively contaminated, economizer based “free cooling” is the preferred less costly and energy conscious method of low ambient cooling.
GUIDE SPECIFICATIONS Packaged Rooftop Electric Cooling Unit with Gas Heat, Variable Capacity, Variable Air Volume Cooling Constant Air Volume Heating with Puronr R--410A Refrigerant and ComfortLinkt Controls Cooling Size Range: 4 to 5 Tons, Nominal Cooling 48,000 to 60,000 Btuh Heating Size Range: 35,700 to 121,5000 MBtuh (Gas heat output) Carrier Model Numbers: 48PD Part I. General 1.
3. Induced--draft blower shall be of the direct driven, single inlet, forward--curved, centrifugal type. It shall be made from aluminized steel with a corrosion--resistant finish and shall be dynamically balanced. D. Compressor(s) 1. Fully hermetic, digital scroll type with capacity modulation accomplished by separation of the scroll volutes by pulse width modulation control to provide any capacity between 15 and 100%. Compressor shall have internal high--pressure and temperature protection.
H. Filter Section 1. Standard filter section shall consist of factory installed 2--in. thick disposable fiberglass filters and shall be on a dedicated slide out track to easily facilitate access and replacement. 2. Filter section shall use standard size filters and be of common sizes within cabinet sizes. 3. Optional MERV--8 pleated filters of commercially available sizes shall be available. 4. Standard 2--in. filter rack shall be field convertible to 4--in. by removing a spacer. I. Controls and Safeties 1.
4. 5. 6. 7. 8. 9. 10. 11. e. Economizer outdoor hood shall be pre--painted and fully assembled. f. Economizer shall be available for field or factory installation. * Two--Position Motorized Outdoor Air Damper: a. The damper shall admit up to 50% outdoor air. Spring return damper closes when unit is off. b. The package shall include a multiple--blade damper and motors. c. Shall be available as factory--installed option and field-installed accessory. * Manual Outdoor Air Damper: a.
