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ESC

ESC

Petra Energy Saving System

Petra Energy Saving System

Petra ESC (Energy Saving and Conservation) system is uniquely designed to enhance energy savings and to produce optimal reduction in power consumption.

The ESC system consist of Petra Heat Pump Water Source (indoor unit) which operates in either heating or cooling mode to provide the required comfort conditions to the application space.

The ESC system is made up of a closed loop of water, therefore any loss of water is highly unlikely.

Compared to other HVAC systems, Petra ESC system has a higher COP in both heating and cooling.

Also, the ESC system is suitable for multistory and high rise buildings (apartments, hotels, schools, hospitals, and offices).

Petra ESC system is designed to eliminate power sharing problems between different occupants, because each user has his own indoor unit and pump. Therefore, each individual electricity reflects leads to actual power consumption per user Another advantage of the ESC system is during mild seasons such as spring and fall, where occupants on the sunny side and interior of the building operate the ESC system in cooling mode and occupants in the shady side of the building operate the ESC system in heating mode. This case provides a form of heat recovery and produces great energy savings in addition to increasing the COP significantly.

  • Superior Efficiency
  • Low Noise Units
  • Compact Physical Footprint
  • Outstanding Finishing
  • Easy Installation and Maintenance
  • Design Flexibility
  • Cooling & Heating Modes
  • Pumping System
  • ESC Pumping Cabinet (Optional)
  • Installation requirements:
    • Petra Dry Cooler (PDC) outdoor unit
    • Petra Water Source (PWSP4) indoor units
    • Pumping cabinet
    • Water pipes (supply and return between indoor and outdoor), could be pex-pipe (recommended or black steel or other proper pipes

Outdoor Unit:

    • Galvanized C-channel steel base with lifting lugs painted with Acrylic Polyurethane Enamel that offers excellent coverage, and a highly durable gloss and hardness to the base surface in order to protect it against outside affects.
    • Heavy duty mounting chassis for the whole unit, coated with weatherproof, polyester powder electrostatic paint, oven-baked to ensure maximum gloss and hardness
    • Coils are manufactured from seamless copper tubes mechanically expanded into aluminum fins
    • All coils are air pressure tested at 450 Psi (3,100 kPa), under water to avoid leakage. They also undergo dry chemical cleaning after manufacturing for optimum system cleanness
    • All condenser fans are of the propeller (axial) type which are directly mounted on the motor’s shaft
    • All fans motors are premium efficiency totally enclosed, air-cooled, permanently lubricated induction type motors
    • Supply and return headers on dry cooler: Headers are seamless copper pipes epoxy painted after being cleaned, to maintain pipe material and brazing protected against all external conditions
    • Booster pump (one or two)
    • Pressure switch to control booster pump operation, by measuring the pressure drop across dry cooler inlet and outlet
    • External overload for each dry cooler fan motor

Indoor Unit:

    • Easily accessible system components
    • Heavy duty mounting chassis for the whole unit, coated with weatherproof, polyester powder electrostatic paint, oven-baked to ensure maximum gloss and hardness
    • Anti-vibration mounts under compressor (rubber pad type)
    • Compressor jacket to isolate compressor noise.
    • Expansion Device
    • Heat pump application (with suction accumulator as standard)
    • Liquid line shut-off valve (for three phase units)
    • Filter dryer (disposable for models PWSP4 58 and above)
    • System is fully charged with refrigerant
    • Charging ports with charging nipples
    • Refrigerant strainer for single phase units
    • One-inlet, one-outlet water connections
    • Independent refrigeration circuits (for units with two compressors)
    • Four way valve for heat pump models
    • One main power entry
    • Control circuit breaker to protect the control circuit from short circuit for three phase units
    • Contactor for each motor (compressor, pump and fan motors)
    • Internal thermal protection for motors
    • ON/OFF control switch for each compressor
    • Compressor time delay relay
    • High/Low safety pressure switches
    • Power supply monitor

Outdoor Unit:

    • Built in system pumps
    • Low noise fans
    • Variable frequency drives for fan speed control

Indoor Unit:

    • Hot gas reheat coil for humidity control
    • Liquid line moisture indicator sight glass
    • Pressure gauges (high/low gauges)
    • High pressure relief valve
    • Water regulation valve (loose item)
    • Water flow switch (loose item)
    • Liquid receiver
    • Ground current protection for compressor
    • Building automation system connection
    • Main power circuit breaker for whole unit with indoor isolator
    • External overload for compressor
    • Built-in electric heater as a supplement for the heat pump application
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