PACKAGE PPH Catalog Packaged Air Conditioning units with Hermetic Compressor 3.0-53.0 T.R. @ 50 Hz 3.5-59.0 T.R. @ 60 Hz
R22 www.petra-eng.com 50/60 Hz Imperial
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Petra Products Equipment Description
Series
Air-Cooled Water Chiller (Semi Hermetic Reciprocating Compressors) Air-Cooled Water Chiller (Semi Hermetic Screw Compressor ) Residential Air-Cooled Water Chiller (Hermetic Reciprocating & Scroll Compressor ) Water Cooled Water Chiller (Semi Hermetic Reciprocating Compressors) Water Cooled Water Chiller (Semi Hermetic Screw Compressor ) Residential Water Cooled Water Chiller (Hermetic Reciprocating & Scroll Compressor ) Hot & Cold Residential Water Chiller Centrifugal Fans Air-Cooled Water Chiller (Semi Hermetic Reciprocating Compressors ) Centrifugal Fans Air-Cooled Water Chiller (Semi Hermetic Screw Compressors) Centrifugal Fans Residential Air-Cooled Water Chiller (Hermetic Compressors)
APX APS RWC WPX WPS WRWC HRWC CPX CPS CRWC
Equipment Description Fan Coil Units Low Static Pressure Fan Coil Medium Static Pressure Fan Coil High-Wall Plastic Fan Coil Stack Type Fan Coil Air Side Control Fan Coil Free Standing Decorative Units Air Handlers: Comfort Maker Air Handling Unit (Modular Type)
Series RAC DC PWC RSU ASC FSW CM PAH
Exhaust Fan Package Units With Hermetic (Reciprocating & Scroll Compressor) Package Units With Semi-Hermetic (Reciprocating Compressor) Water Source Unit Self-Contained Wall Mount Air Cooled Package Split Units Ducted Split Unit (Low, Medium & High Capacity -Hermetic Compressor) Ducted Split Unit (High Capacity-Semi Hermetic Compressor) Ducted Split Unit (Centrifugal Condenser Fans Hermetic Comp.) Mini Split Wall Type Mini Split Universal Type (Floor & Ceiling) Cassette Type Unit Free Standing Units Close Control Split Unit (Computer Room) Air Cooled refrigeration Unit Air Cooled refrigeration Unit (Cold Stores) Unit Cooler Unit Freezer
PPH PPS PWSP PWM
DSP DSPS PECU C/HPW C/HPU PCU FSX PASC RFU RCU UC UF * For special cases where standard designs do not fulfill the customer’s requirements, custom-made designs can be made available.
Smart Fan Full Duty
PEXT PEXS
Heaters Unit Heater Electric Heater Duct Heater Others Dry Coolers Package Unit With Natural Gas Heater Heat Pump Application For All Dx Units
Note: EMC certification applies to 50 Hz specifications only. UL & ETL Marks applies on US & Canada markets' products
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Index Main Introduction 1 Model Number Nomenclature 1 Main Description 1 Specifications 2 Standard Features 3 Optional Features 3 Microprocessor Controller 5 Selection Procedure 6 Series Data General Data 50 Hz 8 General Data 60 Hz 10 Model Layout-standard construction12 Model Layout-optional construction 16 Performance Tables 50 Hz 22 Performance Tables 60 Hz 25 Evaporator Coil & Filter Pressure Drop Charts 28 Petra Fan Series 29 Electrical Information Data Tables 50 Hz 34 Data Tables 60 Hz 35 Wiring Diagrams 36 Refrigeration Schematic Diagram 38
Introduction PPH units are single packaged units which are factory assembled, tested and shipped fully charge complete with compressor, evaporator and condenser coils, fans and controls. These packages are designed for outdoor installation, and they used for cooling only or cooling and heat pump application (optional). PPH units are ideal for residential, commercial and industrial applications and are available in nominal range 3.0 to 53.0 tons @ 50Hz and 3.5 to 59.0 tons @ 60Hz. Quality design and construction make PETRA's air-cooled package units with hermetic compressors the preferred choice for applications utilizing DX cooling systems. PETRA's PPH series is designed for flexible capacity applications and easy installation and maintenance. Easy Installation PPH units are compact in design, supplied in a complete package ready for operation, with no extra controls or additional items for installation. The PPH units have a single power point entry with simple connections. All units are designed to ensure maximum compliance with European standards CE-Mark and EMC through TUV. Quick start-up is assured once installation is complete, as each PPH unit is manufactured in an ISO 9001 listed facility to guarantee quality. In addition, all units are tested at the factory to provide reliable start up. Note: For more technical details, please refer to the nearest Sales Office or to PETRA Factory.
Nomenclature P P H 60
Petra Packaged Air Conditioner Hermetic Compressors Unit Size (Nominal Capacity MBH)
Main Description Quiet Operation
Capacities to Fit Requirements
PPH series are basically constructed and engineered with noise reduction as a main consideration with low noise fan mounting, fiber glass insulation for the evaporator section and compressors mounted on vibration isolators.
There is a large product range of packaged units, with capacities ranging from 3.0 to 53.0 tons @ 50Hz and 3.5 to 59.0 tons @ 60Hz refrigeration tons at nominal conditions.
Low Cost Installation Units are factory assembled, pre-charged, tasted and provided with a single electrical connection point. On arrival to the job site they are ready to be lifted to their operating position through the lifting supports available on the units.
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Specifications Casing
Belt Drive Evaporator Fan (for models PPH 85 and above)
Heavy gauge galvanized steel casing with oven baked polyester-epoxy electrostatic powder coating, designed for outdoor installation. Fiber glass insulation for the evaporator section only.
Models PPH85 and higher are provided with forward curved centrifugal DWDI [Double Width Double Inlet] type that are designed for maximum efficiency and uniform air distribution. All fans are V-belt driven with variable pitch pulley (for fan motors with 5.5 kW and less only). All fans are statically and dynamically balanced to ensure quiet operation and optimal performance.
Compressor The compressor(s) used is hermetic refrigerant gas cooled, with internal thermal protection . Starting is direct -on- line with high efficiency and low sound levels, to match all other Petra products' reliability and efficiency. Models PPH 40 up to PPH 105 are with reciprocating type compressors while models PPH 115 and higher are with scroll compressors.
Evaporator Fan Motors (for models PPH 85 and above) Motors are of the totally enclosed induction type, with fan/motor assembly placed on a floating base with a flexible connection at the fan/casing interface. The base itself is mounted on rubber in sheer vibration isolators to eliminate noise and vibration transmission to buildings. All fans motors are of the single- speed type, four pole and highly efficient, induction type motors, totally enclosed air-over, squirrel-cage type, internal thermal current protected, IP55 protection and with class "F" insulation.
Evaporator and Condenser Coils The evaporator and condenser coils are designed to deliver their respective duties at optimum performance at all design conditions. Coils are manufactured from seamless copper tubes mechanically- expanded into aluminum fins. All coils are tested at 450 Psi, air pressure, under water to avoid leakage. They also undergo dry chemical cleaning after manufacturing for optimum system cleanness.
Filters All Models are provided with 1.0 inch thick aluminum flat filter (as standard features). Other filters are available upon request.
Direct Driven, Condenser Propeller Fans All condenser fans are of the propeller axial type, which are directly mounted on the motor shaft. All fans are selected for optimum efficiency and for maximum sound power reduction. Fan blades are made for maximum corrosion resistance, and are statically and dynamically balanced before installation. PETRA also provides its "Patented Design" for condenser fans mounting. This new design offers low noise operation with high efficiency. All condenser fans are equipped with wire guards.
Drain Pan All units are provided with a drain pan having a drain connection from one side. The drain pan is insulated on the sides and underside to prevent condensation.
Insulation All units are internally lined with 1.0 inch thick fiberglass insulation for the coil and fan section (evaporator side only).
Condenser Fan Motor All fans motors are of the six poles, induction type motors, totally enclosed air-cooled, squirrel-cage type, internal thermal current protected, IP55 protection, with class "F" insulation.
Direct Drive Evaporator Fans Models PPH40, PPH50 and PPH60 are provided with forward curved centrifugal fans of the DWDI [Double Width Double Inlet] Type that are designed for maximum efficiency and uniform air distribution. The fans are statically and dynamically balanced to ensure quiet operation and optimal performance Fans are 3-speed and driven by permanent split capacitor electric motors, with internal thermal protection.
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Standard Features b- Through the external timer for Petra Mark III controller. 5. Crank case heater for each compressor. 6. Control circuit breaker. 7. 220 volt as control voltage. 8. Microprocessor controller for model PPH 85 and above, with the following main functions: a- Compressor lead-lag operation to ensure longer life for the compressors and equal running hours between compressors. b- External remote ON/OFF button for remote operation of the unit using external ON/OFF switch or connection to building management system. 9. One power supply input. 10. High (manual reset) and low (automatic reset) pressure safety switches (Capsule type; factory pre-set). 11. For models PPH 105 and above, voltage monitor controller (phase failure relay) for monitoring the main incoming power supply for the unit, which provides protection from single phasing, under voltage, phasevoltage imbalance and phase- consequence.
A) Construction standard: 1. Easily accessible system components. 2. Ample space for easy access to power and control panels. 3. Heavy duty mounting chassis for the whole unit with lifting lugs. 4. Rubber anti-vibration mounting for the compressors. 5. Weather proof, polyester-epoxy powder electrostatic paint oven-baked finish for sheet metal and multi polyesterepoxy coating for base frame. 6. All units are shipped out from factory tested with safety and control devices set against client requirement. 7. Variable pitch pulley for evaporator motor (for motors of 5.5 kW and less). 8. Single skin evaporator side with 1 inch thick fiberglass insulation. 9. All suction lines are covered with rubber insulation, and for further protection, the lines that extends in the condenser side are wrapped-in cheese cloth and epoxy painted with the same compressor color.
B) Electrical features:
C) Refrigeration features:
1. Control and power panels include the direct on line starting contactors for the compressors and condenser fans' motor. 2. Internal thermal motor protector for condenser and evaporator fan motor. 3. Compressor electronic internal thermal protection. 4. Anti-recycling protection for compressors (time delay): a- Through microprocessor for Petra Mark IV controller.
1. Hermetic suction gas cooled compressor motor. 2. Filter drier (disposable type). 3. Charging ports. 4. Service valve on liquid line. 5. Thermostatic expansion valve. 6. Fully charged unit with Freon R-22. 7. Solenoid Valve.
Optional Features 14. Economizer option with fresh, return and exhaust air dampers with actuators. 15. Gas Heater.
A) Construction options: 1. Plastic mesh around condenser section perimeter. 2. Mixing box with manually operated fresh and return air dampers. 3. Roof top arrangement (bottom air supply and return unit). 4. Roof curb mounting. 5. Bag filter. 6. Anti corrosion protection for coils fins (for copper / aluminum coils only). 7. Copper/copper coils. 8. Hot water coil (built inside unit) 9. Synthetic fiber media for flat filter. 10. 2.0" or 4.0" thick flat filter or V-type filter. 11. Double skin evaporator side. 12. Different evaporator side insulation material. 13. 2.0" thick insulation for evaporator side only.
If this option is installed, the unit has the ability to work with free cooling or free heating mode allowing it to exploit the external environmental condition as much as possible, since it avoids turning on the heaters and the compressors. This function can be achieved by controlling the opening/closing of the external air damper. With reference to the difference between the outdoor air temperature (STD)/enthalpy and the indoor air temperature/(STD) enthalpy.
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B) Electrical options:
C) Refrigeration options:
1. Power circuit breaker for each motor. 2. Main power molded case circuit breaker for the whole unit (can also be with external handle as an option). 3. Low ambient control. The refrigeration systems in all units are inherently designed to operate efficiently, without extra controls or modifications. To permit the unit to operate in low ambient conditions, head pressure control can be installed either by: - ON/OFF Condenser fans sequencing (for models with 2 condenser fans). - Varying the speed of the condenser fan motor using speed controller. 4. Disconnect service switch, a unit mounted non-fused disconnect service switch with an external handle to isolate the unit from the power supply for servicing. 5. Ampere meter and voltmeter installed on the electric control panel door. 6. Earth leakage relay for each compressor. 7. Earth leakage relay for the whole unit. 8. External overload relay for each motor. 9. Power factor correction capacitors. 10. Auto or manual provision for pump down operation of each compressor stop. 11. Building automation system interface. Interfacing with other building management system can be achieved by an optional card, which can communicate with other devices using the serial communication port. 12. Electric heater for heating purposes (built inside unit for cooling units only). 13. Electric heater (built inside unit) to supplement unit operation in case of heat pump mode operation. 14. Special microprocessor controller with additional feature, such as: a- Economizer operation and control with free cooling function. b- Display of additional function (condenser pressure, ambient temperature, return temperature, defrost control, low ambient control, buzzer alarm etc.). c- Time schedule and zone control. 15. Motor actuator for fresh, return and exhaust air dampers. 16. Voltage monitor controller (phase failure relay) for monitoring the main incoming power supply for the unit, which provides protection from single-phasing, under-voltage and over voltage, phase voltage imbalance and phase nonsequence (for models PPH 40 up to PPH 85). 17. Variable Air Volume (VAV) control. 18. Winter start relay. 19. General alarm out put relay. 20. Auto-manual evaporator fan operation for airflow balancing.
1. Heat pump package unit with 4-way reversing valve, suction accumulator is a standard feature in heat pump option. 2. Pressure gauges for each refrigeration circuit (high/low pressure gauges). 3. Other refrigerant application (R-134a and R-407c). 4. Hot gas bypass (where it is necessary to avoid low suction pressure and "compressor cycling"). 5. Extra refrigerant accessories such as suction accumulators (for cooling units only), refrigerant liquid receivers, oil separators, etc. 6. Solenoid valve for heat pump mode. 7. Liquid line sight glass.
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Microprocessor Controller (Main Controller) PETRA's microprocessor controller is engineered to meet the most demanding requirements of all control and data monitoring applications. It could be activated to perform different functions for cooling and heat pump applications.
Microprocessor controller is a standard feature on all models. allowing service technicians to inspect and maintain such devices in the conventional manner. For external communication, RS-485 (Industrial Communication Protocol) interface is provided (optional). An optional special communication adapter could be provided to communicate directly with RS-232 serial interface to provide complete supervision for all functions, setting (configuration) and alarm condition. A special software can communicate with a remote control room through modems for monitor and controlling the unit.
However, in order to render the microprocessor control and peripherals easy to use by all skill levels of service teams, only necessary functions for safety sequence of operation and alarm function are activated as standard. In standard execution, while using the microprocessor for packaged unit control, it communicates with the standard conventional control such as high pressure , low pressure etc, thus
Petra Mark III Controller
Optional Advanced Controller (Petra Mark IV)
The Standard Petra Controller (Petra Mark III) provides the following features: 1- Ease of use with a large LED display of a highly attractive user friendly interface. 2- Ability to control units in cooling and heat pump modes. 3- Temperature readings °C or °F. 4- Controls activation of three heaters (optional). 5- Remote (ON/OFF) system selection. 6- Controlling activation of humidification and dehumidification system (optional). 7- Extended wall mounted display for remote control and monitoring of the package unit up to 150 meters using a bipolar cable. (optional) 8- Safety and control time delays:A-Time delay between two subsequent starts of the same compressor. B- Time delay between activation of 1st and 2nd compressor. C- Time delay between heaters activation and of supply fan speed variation. D- Time delay for supply fan in start-up and shut down.
The Advanced Petra Controller provides the following features, in addition to all the standard features mentioned in the Petra Mark III controller. This controller has the following extra functions: 1- L.C.D display (4 lines *20 characters). 2- Complete message display. 3- Automatic pump down at each compressor stop. (optional) 4- External analogue signal for remote modification of the set point which also can be used for power demand limit for the unit. (optional) 5- Historical alarm option which can save the last 1600 alarms. 6- Ability to be connected to a serial printer directly without using a P.C. (optional) 7- Optional graphical display. 8- Super heat controlling. (optional) 9- Discharge or/and suction pressure readings. (optional) 10- Full alarm management with alarm message and an audible alarm. (optional) 11- Ability to be connected to a building management system using an optional card. (optional) 12- Supervisory and maintaining function with hardware and software provided by Petra. (optional) 13- User-friendly interface display. 14- Time schedule by using an additional clock board. 5
Selection Procedure This example illustrates a step by step selection procedure to assist any user of this catalogue to select the appropriate package unit to meet specific requirements.
Design Condition Requirements Total cooling load Sensible cooling load Ambient Temperature Evaporator entering air temperature (DB/WB) Evaporator air flow External static pressure Altitude
Altitude (ft)
530 MBH 350 MBH 95 °F 80 / 67 °F 15,000 CFM 0.5” of Water 3000 Ft
Sea Level 1000 2000 3000 4000 5000 6000 7000 8000
Unit Size Selection
Capacity Correction Factor 1 0.995 0.99 0.985 0.98 0.973 0.967 0.96 0.95
Using the correction factor table to correct capacity for altitude, the required capacity will be: Corrected Capacity = Required Capacity / Correction Factor = 530 / 0.985 = 538.1 MBH Corrected Sensible Capacity = Required Sensible Capacity / Correction Factor = 350/ 0.985 = 355.3 MBH From the cooling capacity tables (Performance Tables on page 24, model PPH530 is the closest selection to the required capacity. So, from the table: Total Capacity = 542.5 MBH Sensible Capacity = 361.9 MBH Evaporator Fan Selection 1. Determine Evaporator Coil Face Velocity From the general data tables on page 9, find the evaporator coil area ft2 . Coil face velocity
= Air flow rate [CFM]/Coil Area [Ft2] = 15000/32 =468.75 fpm
Filter Face Velocity
=468.75 fpm
Now use the coil and filter charts on page 28, using face velocity of fpm to get the coil pressure drop and filter pressure drop which are about 0.33 inch [H2O] and 0.125 inch [H2O] respectively. Calculate total pressure drop Total static pressure drop = External Static pressure drop+Evaporator Coil pressure drop+filter Pressure drop = 0.5+ 0.33+0.125 = 0.955 Inch of [H2O]
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Now from the general data table on page 9 find the evaporator fan model to be PETRA 9 unit, From the fan curves on pages 30 with air volume of (16000 cfm) find the following:A. Dynamic pressure drop [Velocity pressure] at 16000 cfm to be inch of [H2O] B. Determine total fan pressure drop: - Total Fan pressure drop
= Total static pressure drop + Dynamic pressure drop = 0.955 + 0.48 = 1.435 inch of [H2O]
Now from the fan curve with 7500* cfm and 1.435 H2O we get the following: 1) Revolution / miniature impeller 2) Absorbed power
: 585 RPM : 1.75 KW
*From the above data the following must be done to get the data for the double fans (this unit has 2 fans) 1) RPM should be multiplied by * 1.05, so 585 * 1.05 = 614 RPM (approximately) 2) The absorbed power should be multiplied by * 2.15, so 1.75 * 2.15 = 3.76 kW (approximately) 3) The motor kW can be obtained by adding power correction , (i.e 20%), so 3.76 * 1.20 = 4.512 kW = 5.5 kW ( from the standard motors) - Sound power level: from the general data tables on page 9, the sound pressure level at 10 ft=78.0 dB(A) 33 ft=72.0 dB(A) *note:when the unit has two evaporator fans, the following should be done: 1) CFM should be divided by 2 2) RPM should be multiplied by * 1.05 3) The absorbed power should be multiplied by * 2.15
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Model Layout - Optional Construction With Bag Filter
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Model Layout - Optional Construction With Mixing Box
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Model Layout - Optional Construction With Mixing Box & V. Filter
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Model Layout - Optional Construction With Economizer & Return Fan
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Model Layout - Optional Construction Rooftop
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Model Layout - Optional Construction Rooftop With Gas Heater
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Petra Fan Series
Total Pressure Drop [inch of water]
Petra 4
1.20 1.08 0.96 0.84 0.72 0.60 0.48 0.36 0.24 0.12 0
0
235 471 706 942 1177 1413 1648 1884 2119 2354 2590 2825
Air Flow Rate [CFM]
Note: This curve is for direct drive fan - 3 speed
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Petra Fan Series Petra 8
4.40 4.00 3.60 3.20 2.80
Total Pressure Drop [inch of water]
2.40 2.00
1.60
1.20
0.80
0.60
0.40 0.36 0.32 0.00 0.90
1.18
1.47
1.77
2.35
3.00 3.53 4.12 4.71 5.30 5.89
8.83
11.77
Air Flow Rate [CFM] * 1000
0.2
0.4
0.8
1.2 1.6 2.0
4.0
8.0
12.0 16.0 20.0
Fan Dynamic Head [inch of water] ¸ 10 31
Petra Fan Series Petra 9
4.00 3.60 3.20
Total Pressure Drop [inch of water]
2.80 2.40 2.00
1.60
1.20
0.80
0.60
0.40 0.36 0.32 0.00 1.77
2.35
3.00
3.53 4.12 4.71 5.30 5.89
8.83
11.77
17.66
Air Flow Rate [CFM] * 1000
0.2
0.4
0.8
1.2
1.6 2.0
4.0
8.0
12.0 16.0 20.0
40.0
Fan Dynamic Head [inch of water] ¸ 10 32
Petra Fan Series Petra 19
14.00 12.00
Total Pressure Drop [inch of water]
8.00
4.00
2.00 1.60 1.20
0.80
0.40 0.32 1.27
2.12
4.24
6.36
8.47 10.60
21.19
42.37
63.57
95.34
Air Flow Rate [CFM] * 1000 0.04
0.2
0.4
2.0
4.0
20.0
40.0
Fan Dynamic Head [inch of water] ¸ 10 33
Typical Wiring Diagrams
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Typical Wiring Diagrams
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Refrigeration Schematic Diagram
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International Distribution Offices
United Arab Emirates Abu Dhabi - Petra Air Conditioning Est. Tel (9712) 6391308 Fax 6211027 Dubai - Saif Inter national Group Tel (9714) 2958989 Fax 2958990 Lebanon - Petra Liban Ltd Tel (9611) 663573 Fax 646209 West Bank - Petra International Export Co. Ltd. Tel/Fax (9702) 2960701 Tunisia - Tunis Universal Petra Tel/Fax (216) 71441960 Egypt - Ain Shams Company Tel/Fax (202) 2754463/72 Saudi Arabia - Peninsular Distribution Company Ltd. (An Abdul Latif Jameel Group Company) Tel (9662) 6930000 Fax 6283923
Kuwait - Nouri Industrial Est. Tel (965) 4333355 Fax 4344085 Qatar - Ajjaj Trading Co. (W.L.L.) Tel (974) 4691546 Fax 4687258 California - USA Air Treatment Corporation Tel (909) 8697975 Fax 5985265 Pennsylvania, Maryland, Delaware and Parts of New Jersey - USA Peirce - Phelps, Inc. Tel (215) 8795079 Fax (215) 8795141 North New Jersey and New York City - USA DEBTRA A/C Sales Tel (973) 4292828 Fax (973) 4294909 e-mail:
[email protected] Upstate New York and Vermont - USA Advanced Comfort Systems Tel (518) 8848444 Fax (518) 8848411
Pakistan - Genaire (PVT) Ltd. Tel (9221) 4534161 Fax 4538162
Quality Management System ISO 9001;2000 and Environmental Management System ISO 14001;1996 Certification applies to Jordan Office only Copyright © 2002 By Petra Engineering Industries Co. Design & Layout Copyright © 2002 By Petra Engineering Industries Co. ALL MODELS SIZES AND DIMENSIONS ARE SUBJECT TO CHANGE WITHOUT PRIOR NOTICE
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PP/PPH-R22-50-60 Hz-Imp/2002/rev.0
