PAD3. Product Specifications. 13 SEER PACKAGE AIR CONDITIONER, 2.5 to 5 TONS 208/ , REFRIGERATION CIRCUIT EASY TO INSTALL AND SERVICE

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1 SOUND REFRIGERANT ENVIRONMENTALLY PAD3 Product Specifications 13 SEER PACKAGE AIR CONDITIONER, 2.5 to 5 TONS 208/ , REFRIGERATION CIRCUIT Environmentally sound R 410A refrigerant Scroll compressor standard on all models Copper tube/aluminum fin condenser and evaporator coils Dehumidification mode (airflow reduction) on all models EASY TO INSTALL AND SERVICE Installs easily on a rooftop or at ground level Easy three panel accessibility for maintenance and installation Easily converts to down discharge applications BUILT TO LAST 2 spacing wire grilles standard on all models Pre-painted steel cabinet High efficiency ECM indoor blower motor on all models Vertical condenser fan discharge Full perimeter steel base rails High and Low pressure switches provide added reliability for the compressor LIMITED WARRANTY * 5 year compressor limited warranty 1 year parts limited warranty * See warranty certificate for complete details and restrictions. Use of the AHRI Certified TM Mark indicates a manufacturer s participation in the program. For verification of certification for individual products, go to UNIT PERFORMANCE DATA Model Number COOLING Unit Dimensions Height x Width x Depth in (mm) Operating Weight lbs (kg) Capacity BTU/h SEER EER PAD330000H000C 28, /8x48 3/16x32 5/8 (1070x1226x829) 277 (126) PAD336000*000C 34, /8x48 3/16x32 5/8 (1172x1226x829) 283 (128) PAD342000*000C 40, /4x48 3/16x44 1/8 (1137x1226x1122) 369 (167) PAD348000*000C 46, /4x48 3/16x44 1/8 (1187x1226x1122) 375 (170) PAD360000*000C 57, /4x48 3/16x44 1/8 (1187x1226x1122) 397 (180) * H = 208/ , L = SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE 7/14/16

2 MODEL SERIES P = Package A = Air Conditioner D = Standard 3 = 13 MODEL NOMENCLATURE ,6 7,8, , P A D H 00 0 C 1 TIER 4 = 14 SEER 30 = 30,000 BTUH = 2.5 Tons 36 = 36,000 BTUH = 3 Tons 42 = 42,000 BTUH = 3.5 Tons 48 = 48,000 BTUH = 4 Tons 60 = 60,000 BTUH = 5 Tons NOMINAL COOLING CAPACITY 000 = no factory heat NOMINAL HEATING BTUH (input) H = 208/ L = VOLTAGE 00 = No options FACTORY INSTALLED OPTIONS 0 = Standard FEATURE CODE Sales Model Digit Engineering Digit AHRI* CAPACITIES Cooling Capacities and Efficiencies UNIT SIZE NOMINAL TONS STANDARD CFM NET COOLING CAPACITIES (Btuh) EER** SEER / , , / , , , LEGEND db Sound Levels (decibels) db Dry Bulb SEER Seasonal Energy Efficiency Ratio wb Wet Bulb COP Coefficient of Performance * Air Conditioning, Heating & Refrigeration Institute. **At A conditions 80 F (26.7 C) indoor db/67 F (19.4 C) indoor wb & 95 F (35 C) outdoor db. Rated in accordance with U.S. Government DOE Department of Energy) test procedures and/or AHRI Standards 210/240. Notes: 1. Ratings are net values, reflecting the effects of circulating fan heat. Ratings are based on: Cooling Standard: 80 F (26.7 C) db, 67 F wb (19.4 C) indoor entering air temperature and 95 F db (35 C) outdoor entering air temperature. 2. Before purchasing this appliance, read important energy cost and efficiency information available from your retailer. A Weighted Sound Power Level (dba) STANDARD TYPICAL OCTAVE BAND SPECTRUM (dba without tone adjustment) UNIT SIZE RATING (dba) * Tested in accordance with AHRI Standard (not listed in AHRI) physical data. 2

3 Physical Data UNIT SIZE NOMINAL CAPACITY (ton) 2-1/ /2 4 5 SHIPPING WEIGHT* lb. SHIPPING WEIGHT* (kg) COMPRESSORS Quantity REFRIGERANT (R-410A) Quantity lb Quantity (kg) REFRIGERANT METERING DEVICE OUTDOOR COIL Rows...Fins/in. Face Area (sq ft) OUTDOOR FAN Nominal Cfm Diameter in. Diameter (mm) Motor Hp (Rpm) INDOOR COIL Rows...Fins/in. Face Area (sq ft) INDOOR BLOWER Nominal Cooling Airflow (Cfm) Size in. Size (mm.) Motor HP (RPM) HIGH PRESSURE SWITCH (psig) Cut out Reset (Auto) LOSS OF CHARGE / LOW PRESSURE SWITCH (Liquid Line) (psig) cut out Reset (auto) RETURN AIR FILTERS Throwaway Size in. Throwaway Size (mm) /5 (810) x10 254x254 1/2 (1050) /5 (810) x x254 3/4 (1000) Scroll TXV /5 (810) x x254 3/4 (1075) 650 +/ / / / /5 (810) /5 (810) x x (1075) 11x x (1040) 20x24x1 508x610x25 24x30x1 610x762x25 24x36x1 610x914x25 *For 460 volt units add 14 lb (6.35 kg) to the shipping weight. Required filter sizes shown are based on the larger of the AHRI (Air Conditioning, Heating and Refrigeration Institute) rated cooling airflow or the heating airflow velocity of 300 ft/minute for throwaway type or 450 ft/minute for high capacity type. Air filter pressure drop for non standard filters must not exceed 0.08 in. W.C. If using accessory filter rack refer to the filter rack installation instructions for correct filter sizes and quantity. ELECTRIC HEAT PRESSURE DROP TABLES (IN. W.C.) Small Cabinet: kw kw kw kw kw Large Cabinet: kw kw kw kw kw

4 OPTIONS AND ACCESSORIES ITEM DESCRIPTION FACTORY INSTALLED OPTION Coil Options Base unit with tin plated indoor coil hairpins X Corporate Thermostats Thermostats provide control for the system heating and cooling functions. Crankcase Heater Crankcase Heater provides anti floodback protection for low load cooling applications. Horizontal Economizer with solid state controls and barometric relief dampers includes filter racks and provide outdoor air during cooling and reduce compressor operation. Economizer Vertical Economizer with solid state controls and barometric relief dampers includes filter racks and provide outdoor air during cooling and reduce compressor operation. X FIELD INSTALLED ACCESSORY Electric Heaters Electric Heat Supplement X Filter Rack Filter Rack features easy installation, serviceability, and high filtering performance for vertical applications. Includes 1 in. filter. X X Flat Roof Curb Low Ambient Kit Louver Metal Outdoor Coil Grilles Manual Outside Air Damper Square to Round Duct Transition Kit Time Guard II *Refer to Price Page for application detail. Electric Heaters 14 in. (356 mm) Flat Roof Curb is available for roof mounted applications. Low Ambient Kit (Motormaster II Control) allows the use of mechanical cooling down to outdoor temperatures as low as 0 F ( 18ºC) when properly installed. Louver Metal Outdoor Coil Grilles provides hail and vandalism protection. Manual Outside Air Damper includes hood and filter rack with adjustable damper blade for up to 25% outdoor air. Square to Round Duct Transition Kit enable size units to be fitted to 14 in. (356 mm) round ductwork. Automatically prevents the compressor from restarting for at least 4 minutes and 45 seconds after shutdown of the compressor. Not required when a corporate programmable thermostat is applied or with a RTU MP control. CATALOG NOMINAL FUSE USED WITH SIZES ORDERING NO. CAPACITY (kw) QTY ELECTRIC HEATERS (208/230 THREE PHASE 60 Hz) CPHEATER055A X X X X X CPHEATER056A X X X X X CPHEATER068A X X X X X CPHEATER057A X X X X X CPHEATER058A X X X X X CPHEATER059A X X X ELECTRIC HEATERS (460 THREE PHASE 60 Hz) CPHEATER060A X X X X CPHEATER061A X X X X CPHEATER062A X X X X CPHEATER063A X X X NOTE: Electric heaters are rated at 240v. Refer to Multiplication Factors table for other voltages. X = Approved combinations. Minimum Airflow for Safe Electric Heater Operation (CFM) SIZE CFM X X* X X X X X X X X 4

5 ECONOMIZER COIL FILTER ECONOMIZER SIDE VIEW CAULK BOTTOM CORNER OF ECONOMIZER ON EACH SIDE COIL FI LTER ECONOMIZER Vertical Economizer BASE FLANGE ON BASE DETAIL FILTER RACK BEND FLANGE AT 90 -SCREW TO DIVIDER WITH 1-IN. (25 mm) SCREW TOP FILTER RACK Horizontal Economizer EV APORATOR COIL MANUAL OUTSIDE AIR DAMPER REPLACEMENT PANEL MANUAL OUTSIDE AIR HOOD DAMPER BLADE BOTTOM FILTER RACK A

6 UNIT DIMENSIONS PAD A

7 UNIT DIMENSIONS PAD A

8 ROOF CURB ACCESSORY PAD HVAC unit base rails HVAC unit basepan G C B Dashed lines show cross support location for large basepan units. Sealing Gasket Anchor screw Flashing field supplied Roofing material field supplied Cant strip field supplied Roofcurb Wood nailer* Roofcurb* Insulation (field supplied) A F D H E *Provided with roofcurb SMALL/COMMON CURB A09413 A09090 ROOF CURB DETAIL B G C SUPPLY AIR SMALL BASE UNIT F A H E RETURN AIR LARGE BASE UNIT D UNIT PLACEMENT ON COMMON CURB A09094 LARGE CURB A09415 SMALL OR LARGE BASE UNIT UNIT SIZE Small or Large CATALOG NUMBER A IN. (mm) B (small/common base) IN. (mm)* CPRFCURB011A00 14 (356) 10 (254) Large CPRFCURB013A00 14 (356) 14 (356) B (large base) IN. (mm)* C IN. (mm) 14 (356) 16 (406) D IN. (mm) 47.8 (1214) E IN. (mm) 32.4 (822) 43.9 (1116) F IN. (mm) 2.7 (69) G IN. (mm) 30.6 (778) 42.2 (1072) A09414 H IN. (mm) 46.1 (1170) * Part Number CPRCURB011A00 can be used on both small and large basepan units. The cross supports must be located based on whether the unit is a small basepan or a large basepan. NOTES: 1. Roof curb must be set up for unit being installed. 2. Seal strip must be applied, as required, to unit being installed. 3. Roof curb is made of 16 gauge steel. 4. Attach ductwork to curb (flanges of duct rest on curb). 5. Insulated panels: 1 in. (25.4 mm) thick fiberglass 1 lb. density. 8

9 SELECTION PROCEDURE (WITH EXAMPLE) 1. Determine cooling and heating requirements at design conditions: Given: Required Cooling Capacity (TC)... 34,000 Btuh Sensible Heat Capacity (SHC) Required Heating Capacity... 25,000 Btuh... 30,000 Btuh Condenser Entering Air Temperature 95 F(35 C) Indoor Air Temperature Evaporator Air Quantity F (26 C) edb 67 F (19 C) ewb CFM External Static Pressure IN. W.C. Electrical Characteristics Select unit based on required cooling capacity. Enter Net Cooling Capacities table at condenser entering temperature of 95 F (35 C), indoor air entering at 1200 CFM and 67 F (19 C) ewb (entering wet bulb). The unit will provide a total capacity of 34,400 Btuh and a SHC of 25,900 Btuh. 3. Select electric heat. The required heating capacity is 30,000 Btuh. Determine additional electric heat capacity in kw. 30,000 Btuh = 8.8kW of heat required 3,414 Btuh/kW Enter the electric Heater Packages table for 208/240, three phase, PAD336 unit. The 10 kw heater at 240v most closely satisfies the heating required. To calculate kw at the 230v, multiply the heater kw by multiplication factor 0.92 found in the Wattage Multiplication Factors table. 10 kw x 0.92 = 9.2 kw 9.2 kw x 3414 = 31,409 Btuh 4. Determine fan speed and power requirements at design conditions. Before entering the air delivery tables, calculate the total static pressure required. From the given example, the Wet Coil Pressure Drop Table, and the Filter Pressure Drop Table: External Static Pressure Filter Wet Coil Pressure Drop Total Static Pressure 0.30 IN. W.C IN. W.C IN. W.C IN. W.C. Enter the table for Wet Coil Air Delivery horizontal discharge, 230. At 0.60 IN. W.C. ESP (external static pressure) and medium high speed, the fan will deliver 1316 CFM. 5. Select unit that corresponds to power source available. The Electrical Data Table shows that the unit is designed to operate at 208/

10 KW PERFORMANCE DATA PAD330 EVAPORATOR AIR CFM/BF EWB F ( C) CONDENSER ENTERING AIR TEMPERATURES F ( C) 75 (23.9) 85 (29.4) 95 (35) 105 (40.6) 115 (46.1) 125 (51.7) Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Total Sens KW Total Sens KW Total Sens KW Total Sens KW Total Sens KW Total Sens 875/ / / (13.8) (16.6) * (17.2) (19.4) (22.2) (13.8) (16.6) * (17.2) (19.4) (22.2) (13.8) (16.6) * (17.2) (19.4) (22.2) PAD336 EVAPORATOR AIR CFM/BF EWB F ( C) CONDENSER ENTERING AIR TEMPERATURES F ( C) 75 (23.9) 85 (29.4) 95 (35) 105 (40.6) 115 (46.1) 125 (51.7) Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Total Sens KW Total Sens KW Total Sens KW Total Sens KW Total Sens KW Total Sens KW 57 (13.8) (16.6) / * (17.2) (19.4) (22.2) (13.8) (16.6) / * (17.2) (19.4) (22.2) (13.8) (16.6) / * (17.2) (19.4) (22.2) See Legend and Notes on Page

11 KW 11 PERFORMANCE DATA (CONT) PAD342 EVAPORATOR AIR CFM/BF EWB F ( C) CONDENSER ENTERING AIR TEMPERATURES F ( C) 75 (23.9) 85 (29.4) 95 (35) 105 (40.6) 115 (46.1) 125 (51.7) Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Total Sens KW Total Sens KW Total Sens KW Total Sens KW Total Sens KW Total Sens 1225/ / /0.05 PAD348 EVAPORATOR AIR CFMBF 1400/ / / (13.8) (16.6) * (17.2) (19.4) (22.2) (13.8) (16.6) * (17.2) (19.4) (22.2) (13.8) (16.6) * (17.2) (19.4) (22.2) EWB F ( C) CONDENSER ENTERING AIR TEMPERATURES F ( C) 75 (23.9) 85 (29.4) 95 (35) 105 (40.6) 115 (46.1) 125 (51.7) Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Total Sens KW Total Sens KW Total Sens KW Total Sens KW Total Sens Total Sens KW KW 57 (13.8) (16.6) * (17.2) (19.4) (22.2) (13.8) (16.6) * (17.2) (19.4) (22.2) (13.8) (16.6) * (17.2) (19.4) (22.2)

12 KW PERFORMANCE DATA (CONT) PAD360 EVAPORATOR AIR CFM/BF EWB F ( C) CONDENSER ENTERING AIR TEMPERATURES F ( C) 75 (23.9) 85 (29.4) 95 (35) 105 (40.6) 115 (46.1) 125 (51.7) Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Capacity MBtuh Total Total Sens KW Total Sens KW Total Sens KW Total Sens KW Total Sens KW Total Sens 57 (13.8) (16.6) / * (17.2) (19.4) (22.2) (13.8) (16.6) / * (17.2) (19.4) (22.2) (13.8) (16.6) / * (17.2) (19.4) (22.2) * At 75 F (24 C) entering dry bulb Tennessee Valley Authority (TVA) rating conditions; all others at 80 F (27 C) dry bulb. LEGEND BF Bypass Factor edb Entering Dry Bulb Ewb Entering Wet Bulb kw Total Unit Power Input SHC Sensible Heat Capacity (1000 Btuh) TC Total Capacity (1000 Btuh) (net) rh Relative Humidity COOLING NOTES: 1. Ratings are net; they account for the effects of the evaporator fan motor power and heat. 2. Direct interpolation is permissible. Do not extrapolate. 3. The following formulas may be used: t ldb = t edb - Sensible capacity (Btuh) 1.10 x cfm t Wet-bulb temperature corresponding to enthalpy lwb = h total capacity (Btuh) lwb = h ewb - air leaving evaporator coil ( h lwb) 4.5 x cfm Where: h ewb = Enthalpy of air entering evaporator coil 4. The SHC is based on 805 F (26.6 C) edb temperature of air entering evaporator coil. Below 80 F (26.6 C) edb, subtract (corr factor x cfm) from SHC. Above 805 F (26.6 C) edb, add (corr factor x cfm) to SHC. Correction Factor = 1.10 x (1 + BF) x (edb 80). 5. Integrated capacity is maximum (instantaneous) capacity less the effect of frost on the outdoor coil and the heat required to defrost it. 12

13 13 PERFORMANCE DATA (CONT) Dry Coil Air Delivery* Horizontal Discharge (CFM) UNIT MOTOR SPEED WIRE COLOR EXTERNAL STATIC PRESSURE (IN. W.C.) Low Blue CFM Med-Low Pink CFM Medium Red CFM Med-High 1 Orange CFM High Black CFM Low Blue CFM Med-Low Pink CFM Medium 1 Red CFM Med-High Orange CFM High Black CFM Low Blue CFM Med-Low Pink CFM Medium Red CFM Med-High 1 Orange CFM High Black CFM Low Blue CFM Med-Low Pink CFM Medium 1 Red CFM Med-High Orange CFM High Black CFM Med-Low Pink CFM Medium 1 Red CFM Med-High Orange CFM High Black CFM * Air delivery values are without air filter and are for dry coil (See Horizontal Wet Coil Pressure Drop table). 1 Factory shipped cooling speed Note: For horizontal applications deduct field supplied air filter pressure drop and wet coil pressure drop to obtain external static pressure available for ducting. For downflow applications see Wet Coil Air Delivery Downflow High Speed with 1 in Filter and Economizer Table for available static including wet coil, 1 in. filter and economizer. Shaded areas indicate airflow that are not recommended for dehumidification control. Multiplication Factors HEATER kw RATING VOLTAGE DISTRIBUTION V/3/60 MULTIPLICATION FACTOR

14 14 PERFORMANCE DATA (CONT) Dry Coil Air Delivery* Downflow Discharge UNIT MOTOR SPEED WIRE COLOR Low Blue MedLow Pink Medium Red MedHigh 1 Orange High Black Low Blue MedLow Pink Medium 1 Red MedHigh Orange High Black EXTERNAL STATIC PRESSURE (IN. W.C.) CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP

15 15 PERFORMANCE DATA (CONT) Dry Coil Air Delivery* Downflow Discharge UNIT MOTOR SPEED WIRE COLOR Low Blue MedLow Pink Medium Red MedHigh 1 Orange High Black Low Blue MedLow Pink Medium 1 Red MedHigh Orange High Black Low Blue MedLow Pink Medium 1 Red MedHigh Orange High Black *Air delivery values are without air filter and are for dry coil (See Wet Coil Pressure Drop table). 1 Factory shipped cooling speed. NOTE: Deduct field supplied air filter pressure drop and wet coil pressure drop to obtain external static pressure available for ducting. Shaded areas indicate speed/static combinations that are not permitted. EXTERNAL STATIC PRESSURE (IN. W.C.) CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP CFM WATTS BHP

16 Wet Coil Pressure Drop (IN. W.C.) Unit Standard CFM (SCFM) Size Economizer with 1 in. Filter Pressure Drop (IN. W.C.) Filter Size in. (mm) CFM 12x20x1+12x20x1 (305x508x25+305x508x25) CFM 16x24x1+14x24x1 (406x610x25+356x610x25) CFM 16x24x1+18x24x1 (406x610x25+457x610x25) Cooling Tons 2.5, , 4.0 Standard CFM (SCFM) Filter Pressure Drop Table (IN. W.C.) Filter Size in. (mm) CFM 12x20x1+12x20x1 (305x508x25+305x508x25) CFM 16x24x1+14x24x1 (406x610x25+356x610x25) CFM 16x24x1+18x24x1 (406x610x25+457x610x25) Cooling Tons 2.5, , 4.0 Electric Heat Pressure Drop (IN. W.C.) Small Cabinet: Standard CFM (SCFM) STANDARD CFM (S.C.F.M) kw kw kw kw kw Electric Heat Pressure Drop (IN. W.C.) Large Cabinet STANDARD CFM (S.C.F.M) kw kw kw kw kw

17 TYPICAL PIPING AND WIRING ROOF-MOUNTING CURB ROOF RETURN-AIR FLEXIBLE DUCT SUPPLY-AIR FLEXIBLE DUCT CONCENTRIC DIFFUSER BOX (FIELD-SUPPLIED) CEILING INDOOR THERMOSTAT A09230 RETURN AIR TOP COVER FROM POWER SOURCE DISCONNECT PER NEC* POWER ENTRY CONTROL ENTRY *NEC - National Electrical Code A

18 APPLICATION DATA Condensate trap A 2 in. (50.8 mm) condensate trap must be field supplied. Ductwork Secure downflow discharge ductwork to roof curb. For horizontal discharge applications, attach ductwork to unit with flanges. To convert a unit to downflow discharge Units are equipped with factory installed inserts in the downflow openings. Removal of the inserts is similar to removing an electrical knock out. Maximum cooling airflow To minimize the possibility of condensate blow off from the evaporator, airflow through the units should not exceed 450 cfm per ton. Minimum cooling airflow Minimum cooling airflow is 350 cfm per ton. Minimum ambient cooling operation temperature All standard units have a minimum ambient operating temperature of 40 F (4 C). With accessory low ambient temperature kit, units can operate at temperatures down to 0 F ( 17 C). 18

19 ELECTRICAL DATA VOLTAGE ELECTRIC HEAT POWER SUPPLY UNIT NOMINAL COMPRESSOR OFM IFM RANGE PAD3 V PH HZ NOMINAL FLA MCA MOCP ** MIN MAX RLA LRA FLA FLA kw * / / / /25 7.5/ / / /60 / / / /30 7.5/ / / / / / /35 208/ / / / / / / / / /35 208/ / / / / / / / / /40 208/ / / / / / / * 208/240 or 480 volts ** FUSE OR CIRCUIT BREAKER Note: 460 volt units have 230 volt ID motors with FLA values at 230 volts LEGEND FLA - Full Load Amps IDM - Inducer Motor IFM - Indoor Fan Motor LRA -Locked Rotor Amps MCA - Minimum Circuit Amps MOCP - Maximum Over Current Protection OFM - Outdoor Fan Motor RLA - Rated Load Amps A

20 CONNECTION WIRING SCHEMATIC 208/ A

21 LADDER WIRING SCHEMATIC 208/ A

22 CONNECTION WIRING SCHEMATIC A

23 LADDER WIRING SCHEMATIC A

24 Operating sequence CONTROLS Cooling When the system thermostat calls for cooling, 24 V is supplied to the Y and G terminals of the thermostat. This completes the circuit to the contactor coil (C) and indoor (evaporator) fan motor (IFM). The normally open contacts of C close and complete the circuit through compressor motor (COMP) to outdoor (condenser) fan motor (OFM). Both motors start instantly. Simultaneously, 24 volts is supplied through G to the Interface Fan Board (IFB) and to the IFM. The IFM starts instantly. On the loss of the thermostat call for cooling, 24 V is removed from both the Y and G terminals (provided the fan switch is in the AUTO position) de energizing the compressor contactor and opening the contacts supplying power to compressor/ofm. After a 90 second delay, the IFM shuts off. If the thermostat fan selector switch is in the ON position, the IFM will run continuously. For the 460 V units there is a step down autotransformer supplying 230 V to the Indoor Fan Motor. NOTE: On units with a Time Guard II device: Once the compressor has started and then stopped, it cannot be restarted again until 5 minutes have elapsed. Heating If accessory electric heaters are installed, on a call for heat, circuit R W is made through the thermostat contacts. Circuit R G is made which energizes the IFM. If the heaters are staged, then the thermostat closes a second set of contacts (W2) when second stage is required. When thermostat is satisfied, contacts open, deenergizing the heater relay and the IFM. 24

25 GUIDE SPECIFICATIONS Packaged Electric Cooling Unit Constant Volume Application HVAC Guide Specifications Size Range: 2 1/2 to 5 Tons, Nominal Cooling Model Number: PAD3 Part 1 General SYSTEM DESCRIPTION Outdoor rooftop mounted or ground mounted, electric cooling unit utilizing a hermetic scroll compressor for cooling duty. Unit shall discharge supply air vertically or horizontally as shown on contract drawings. Condenser fan/coil section shall have a draw thru design with vertical discharge for minimum sound levels. QUALITY ASSURANCE A. Unit shall be rated in accordance with AHRI Standards 210/240 and B. Unit shall be designed in accordance with UL Standard C. Unit shall be manufactured in a facility registered to ISO 9001 manufacturing quality standard. D. Unit shall be UL listed and c UL certified as a total package for safety requirements. E. Roof curb shall be designed to conform to NRCA Standards. F. Insulation and adhesives shall meet NFPA 90A requirements for flame spread and smoke generation. G. Cabinet insulation shall meet ASHRAE Standard 62P. DELIVERY, STORAGE AND HANDLING Unit shall be stored and handled per manufacturer s recommendations. Part 2 Products EQUIPMENT A. General: Factory assembled, single piece, heating and cooling unit. Contained within the enclosure shall be all factory wiring, piping, controls, refrigerant charge with R 410A refrigerant, and special features required prior to field start up. B. Unit Cabinet: 1. Unit cabinet shall be constructed of phosphated, zinc coated, pre painted steel capable of with standing 500 hours in salt spray. 2. Normal service shall be through a 3 removable cabinet panels. 3. The unit shall be constructed on a rust proof unit base that has an externally trapped, integrated sloped drain. 4. Evaporator fan compartment top surface shall be insulated with a minimum 1/2 in. (12.7 mm) thick, flexible fiberglass insulation, coated on the air side and retained by adhesive and mechanical means. The evaporator wall sections will be insulated with a minimum semi rigid foil faced board capable of being wiped clean. Aluminum foil faced fiberglass insulation shall be used in the entire indoor air cavity section. 5. Unit shall have a field supplied condensate trap. C. Fans: 1. The evaporator fan motor shall be an ECM. 2. Fan wheel shall be made from steel, be double inlet type with forward curved blades with corrosion resistant finish. Fan wheel shall be dynamically balanced. 3. Condenser fan shall be direct drive propeller type with aluminum blades riveted to corrosion resistant steel spiders, be dynamically balanced, and discharge air vertically. D. Compressor: 1. Fully hermetic compressors with factory installed vibration isolation. 2. Scroll compressors shall be standard on all units. E. Coils: Evaporator and condenser coils shall have aluminum plate fins mechanically bonded to seamless copper tubes with all joints brazed. Tube sheet openings shall be belled to prevent tube wear. F. Refrigerant Components: Refrigerant expansion device shall be of the TXV (thermostatic expansion valve) type. G. Filters: Filter section shall consist of field installed, throwaway, 1 in. (25 mm) thick fiberglass filters of commercially available sizes. H. Controls and Safeties: 1. Unit controls shall be complete with a self contained low voltage control circuit. 2. Units shall incorporate high and low pressure switches. I. Operating Characteristics: 1. Unit shall be capable of starting and running at 125 F (51 C) ambient outdoor temperature per maximum load criteria of AHRI Standard Compressor with standard controls shall be capable of operation down to 40 F (4 C) ambient outdoor temperature. 3. Unit shall be provided with 60 second fan time delay after the thermostat is satisfied. J. Electrical Requirements: All unit power wiring shall enter the unit cabinet at a single location. K. Motors: 1. Compressor motors shall be of the refrigerant cooled type with line break thermal and current overload protection. 2. All fan motors shall have permanently lubricated bearings, and inherent, automatic reset, thermal overload protection. 25

26 3. Condenser fan motor shall be totally enclosed. 4. Evaporator fan motor to be ECM Motor. L. Special Features: 1. Coil Options: Base unit with tin plated indoor coil hairpins available as a factory installed option. 2. Thermostat: To provide for one stage heating and cooling in addition manual or automatic changeover and indoor fan control. 3. Crankcase Heater: Shall provide anti floodback protection for low load cooling applications. 4. Economizer: (Horizontal Field installed accessory) (Vertical Field installed accessory or factory installed option) a. Economizer controls capable of providing free cooling using outside air. b. Equipped with low leakage dampers not to exceed 3% leakage, at 1.0 IN. W.C. pressure differential. c. Spring return motor shuts off outdoor damper on power failure. 5. Electric Heaters: a. Electric heater shall be available as a field installed option. b. Heater elements shall be open wire type, adequately supported and insulated with ceramic bushings. c. Electric heater packages must provide single point power connection capability. 6. Filter Rack Kit: Shall provide filter mounting for downflow applications. Offered as an accessory or as a factory installed option. GUIDE SPECIFICATIONS (CONT) 7. Flat Roof Curb: Curbs shall have seal strip and a wood nailer for flashing and shall be installed per manufacturer s instructions. 8. Low Ambient Package: Shall consist of a solid state control and condenser coil temperature sensor for controlling condenser fan motor operation, which shall allow unit to operate down to 0 F ( 17 C) outdoor ambient temperature when properly installed. 9. Louvered Grille: Wire grille shall be standard on all units. Louvered grille shall be available as a field installed option to provide hail guard and vandalism protection. 10. Manual Outdoor Air Damper: Package shall consist of damper, birdscreen, and rainhood which can be preset to admit outdoor air for year round ventilation. 11. Square To Round Duct Transitions (30 48 size): Shall have the ability to convert the supply and return openings from rectangular to round. 12. Time Guard II Automatically prevents the compressor from restarting for at least 4 minutes and 45 seconds after shutdown of the compressor. Not required when a corporate programmable thermostat is applied or with a RTU MP control. 13. Dual Point Electric Heater Allows you to power the electric heater and unit contactor separately by having two individual field power supply circuits connected respectively. 26

27 ROOF CURBS ACCESSORIES Model Number Description Use With Model Size CPRFCURB011A00 Roof Curb, 14 High CPRFCURB013A00 Roof Curb, 14 High Note: CPRFCURB011A00 can be used with size units with some overhang. ADAPTER CURBS* CPADCURB001A00 Adapter Curb for use with NPRFCURB006A00 & NPRFCURB007A CPADCURB002A00 Adapter Curb for use with NPRFCURB008A00 & NPRFCURB009A * Can also be used when replacing other manufacturer s older generation units that contain a composite base without a metal base rail. CONCENTRIC ADAPTERS (Use with curb only) NPCONADP001A00 For 18 round duct (use with curb CPRFCURB011A00) Small Curb NPCONADP002A00 For 18 round duct (use with curb CPRFCURB013A00) Large Curb CONCENTRIC DIFFUSERS (Ceiling or under roof) AXB020CSA* Step Down Diffuser Fits 2 x 4 Ceiling Grid (16 round collars for flex conn.) AXB020CFA* Flush Mount Diffuser Fits 2 x 4 Ceiling Grid (16 round collars for flex conn.) AXB030CSA Step Down Diffuser Fits 2 x 4 Ceiling Grid (18 round collars for flex conn.) AXB030CFA Flush Mount Diffuser Fits 2 x 4 Ceiling Grid (18 round collars for flex conn.) * A field supplied 18 to 16 round reducer required when used with NP concentric adaptor ECONOMIZERS Model Number Description Use With Model Size CPECOMZR007B00 Dedicated Vertical Economizer Internal with solid state controller, gear driven, fully modulating 30,36 CPECOMZR008A00 damper, spring return actuator, up to 50% barometric relief, supply and dry bulb outdoor 42,48 CPECOMZR009A00 air sensors. Includes filter rack with 1 filters*. 60 CPECOMZR010A00 Dedicated Horizontal Economizer Internal with solid state controller, fully modulating 30,36 CPECOMZR011A00 damper, spring return actuator, supply and dry bulb outdoor air sensor, and low ambient compressor 42,48 CPECOMZR012A00 lockout switch included. Includes filter rack with 1 inch filters*. 60 AXB078ENT Outdoor Enthalpy Control ALL * Outdoor enthalpy available as field installed accessory; Filter rack and 1 filter, same as CPFILTRK kit MANUAL FRESH AIR DAMPERS Model Number Description Use With Model Size CPMANDPR007A00 CPMANDPR008A00 Manual Outside Air Damper (Includes filter rack and 1 filter, same as CPFILTRK kit) 42,48 CPMANDPR009A00 60 INTERNAL FILTER RACK and FILTER (shipped with 1 filters) Model Number Description Use With Model Size CPFILTRK007A00 CPFILTRK008A00 Internal Filter Rack 42,48 CPFILTRK009A00 60 LOW AMBIENT, ANTI CYCLE TIMER Model Number Description Use With Model Size CPLOWAMB001A00 Low ambient Control enables cooling system to operate down to 0 Deg. F by cycling condenser fan on and off ALL NRTIMEGD001A00 5 minute anti cycle timer (Note: many thermostats have inherent anti cycle timer logic) ALL CRANKCASE HEATER BELLY BAND TYPE Model Number Description Use With Model Size NPCRKHTR008A00 240V Crankcase Heater 30, 36 NPCRKHTR004A00 240V Crankcase Heater (included with 60 size models) 42, 48 NPCRKHTR009A00 460V Crankcase Heater 36 NPCRKHTR005A00 460V Crankcase Heater (included with 60 size models) 42, 48 30,36 30,

28 HAIL GUARDS / COIL PROTECTION Model Number Description Use With Model Size NAPA00501GR 3/8 spacing dense wire grilles 30 NAPA00901GR 3/8 spacing dense wire grilles 36 NAPA00601GR 3/8 spacing dense wire grilles 42 NAPA00801GR 3/8 spacing dense wire grilles ELECTRIC HEATERS 208/240V PART NO. NOMINAL CAPACITY (kw) 208V / 240V FUSED # FUSES STAGES Use With CPHEATER055A0* 3.8 / 5.0 NO 0 1 ALL CPHEATER056A0* 7.5 / 10.0 NO 0 2 ALL CPHEATER068A0* 7.5 / 10.0 YES 6 2 ALL CPHEATER057A0* 11.3 / 15.0 NO 0 2 ALL CPHEATER058A0* 11.3 / 15.0 YES 6 2 ALL CPHEATER059A0* 15.0 / 20.0 YES CPHEATER060A0* 5.0 NO 0 2 ALL CPHEATER061A0* 10.0 NO 0 2 ALL CPHEATER062A0* 15.0 NO 0 2 ALL CPHEATER063A0* 20.0 NO DUCT TRANSITIONS NPDUCFLG002A00 Square to 14 Round (1 set of 2, use with horizontal duct flanges only) V Copyright 2016 International Comfort Products Lewisburg, Tennessee USA