WRWC

Water Cooled Residential Chiller with Scroll Compressor

Petra’s water cooled water liquid chillers with hermetic scroll compressors offer a wide range of sizes to meet customer requirements for different applications. Petra’s WRWC Series offer state of the art low sound, reliability and high energy efficiency with a small physical foot-print. Petra’s WRWC Series are designed to be shipped as a complete factory package

• Wide Range of Capacities: 18 kW (5 Tons) to 668 kW (190 Tons) @ 50 Hz, 25 kW (7 Tons) to 897 kW (255 Tons) @ 60 Hz
• Quiet Operation with Optimal Performance
• Small Foot Print
• Extremely High Energy Efficiency

• High performance hermetic scroll compressor
• Microprocessor controller for full management of chiller operation and safety circuits
• High efficiency direct expansion (DX) shell and tube type coolers & condensers with inner grooved tubes to optimize the cooler’s efficiency
• Coolers are tested and stamped for refrigerant side design pressure of 1,000 kPa (145 Psi) and for a maximum water side working pressure of 1,500 kPa (220 Psi)
• Nema 3X with IP54 minimum enclosure standard electrical panel. Two separate panels, one for power & the other for control
• Welded structural C-channel base painted with mono component catalyzed primer sprayed paint
• Epoxy paint for all exposed copper piping system of the refrigeration circuit
• Equipped with complete line of accessories for safe operation and control

• Electronic expansion valve
• Pressure gauges for monitoring of refrigeration discharge and suction pressure
• Water flow switch installed to prevent operation of unit without evaporator water flow
• Cooler cladding of aluminum, stainless steel or painted galvanized steel {made from gauge 22 [0.7 mm (0.03 inch)}
• Cooler can be insulated with closed cell foam insulation of 25 mm (1 inch), 38 mm (1.5 inch) & 50 mm (2 inch) The insulation density is 48 kg/m3 (3 lb/ft3) with a K-factor of 0.035 W/(m.°K) [0.0203 BTUH/(ft.°F)
• Main disconnect switch used to de-energize the power supply to the chiller during servicing or repairing works because of the door interlock with an external handle that is installed on the electric panel door
• Control transformer to supply power input to auxiliary components at 120 or 220 volts, such as (not limited to) bulk head light and GFI outlet
• Ampere-meter & volt-meter used to measure the power current & voltage consumption Ampere-meter is used for each phase
• 120 volt power supply connected through the transformer to provide a 120 volt single phase circuit that is used to operate the electric appliances at site such as laptops, tablets and cell phones
• Dual power connection, one power entry for compressors & the second for the rest of the unit
• External over load for each compressor
• Circuit breaker for each compressor
• Nema 4x electrical panels made from galvanized steel
• Nema 4x electrical panels made from stainless steel
• Cooler tape heater protection down to 0°C (32°F), -18°C (0°F) & -29°C (-20°F)