Water-Cooled Scroll Process Chillers in North America

As the name indicates, a water-cooled process chiller will reject process heat to another fluid-based medium. In most cases, heat rejection by water-cooled scroll process chillers in North America will go to an outdoor evaporative cooling tower.

Legacy Chiller, Inc.’s model PZW water-cooled chiller system is available from 1 to 120 HP. These systems are very compact and light. Keep in mind that all water-cooled condenser process chillers require a way to reject their heat normally to another water source such as a cooling tower.

Available from 1 to 20 tons, with the PZWT’s unique dual-loop (recirculatory) flow technology, these chillers are ideal for mission-critical applications that require very stable approach temperatures within a 24/7/365 service environment.

The PZWT product line is also available with Legacy’s Patented Economizer Technology, capable of reducing energy usage (depending on the operating environment) by up to 60%. The PZWT system has been designed from the ground up to be the industry’s premier process chiller in its capacity class.

A collection of air conditioning and heat pump units, highlighting advanced features for optimal indoor temperature regulation.

Standard Features:

ETL listed to UL1995 and CAN/CSA C22.2 No. 236-11, 4th edition (10/14/2011)
Single-point power connection
Idec microprocessor controller with easy-to-use touch screen display
Stainless steel, brazed plate evaporator
Scroll compressor with crankcase heater
Suction accumulator
Water flow switch
Hot gas bypass capacity control
24V control transformer
Control circuit fusing
Condenser(s): coaxial up to PZW22D
Condenser(s): shell and tube PZW26D through PZW52D
Compressor motor contactor
Painted - powder-coated (most models), galvanized sheet metal cabinet
1/2" insulation on all water and refrigerant lines
Liquid line drier, sight glass, solenoid, TXV
Complete refrigerant charge from the factory
Extended warranty: See your quote or latest IOM booklet revision

[1] denotes optional items on most competing brands.

Tank Models Only:

Stainless steel storage tank with ½-inch insulation
Fused, stainless steel recirculation pump for tank operation with ball valve and cleanable strainer
Tank pressure relief valve, vent, and drain hose bibs

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Options:

Remote Idec touch screen control panel
Industrial VPN router
5-port ethernet switch
BACnet gateway
Process pump VFD controller
4-year extended compressor warranty
Casters (factory mounted)
Condenser water regulating valve
115-volt (rain-tight) service outlet
Non-fused disconnect
Phase monitor, line voltage monitor offering protection against phase loss/reversal, unbalance, and hi/lo voltage
Compressor fusing
Compressor sound cover
Factory-installed evaporator heat tape freeze protection
Low-flow bypass valve
Fused, stainless steel process pump
Dual system pump with manual change-over (some models)
Dual system pump with auto change-over (some models)
Pump suction isolation valve
Water pressure gauge set
Water flow meter
Auto city water change-over panel with filter
Stainless steel, SCH80 PVC or polypropylene piping for deionized and reverse osmosis water systems
Storage tank sight glass (tank models only)
Tank low liquid level indicator with dry contacts (tank models only)

Click on a chiller model below to download a spec sheet.

Water-Cooled Process Chillers, Packaged, Single Circuit Scroll, Tankless

Model Number	Nominal BTUH @ 45°F	Length (In.)	Width (In.)	Height (In.)	Weight	Compressor
Model Number	Nominal BTUH @ 45°F	Length (In.)	Width (In.)	Height (In.)	Weight	Qty.	HP
PZW1S	13,500	36	34	36	210	1	1.3
PZW1.5S	22,500	36	34	36	215	1	2.0
PZW2S	25,400	36	34	36	215	1	2.5
PZW2.5S	37,900	36	34	36	245	1	3.5
PZW3S	42,400	36	34	36	340	1	4.0
PZW4S	54,500	36	34	36	425	1	5.0
PZW4.5S	56,500	36	34	36	425	1	6.0
PZW5S	66,400	36	34	36	450	1	7.0
PZW7S	86,500	36	34	36	525	1	8.0
PZW8S	98,000	36	34	36	585	1	9.0
PZW9S	115,000	46	34	36	600	1	10.0
PZW11S	139,500	46	34	36	725	1	12.0

Water-Cooled Process Chillers, Packaged, Single Circuit Scroll, with Stainless Steel Tank

Model Number	Nominal BTUH @ 45°F	Length (In.)	Width (In.)	Height (In.)	Weight	Compressor
Model Number	Nominal BTUH @ 45°F	Length (In.)	Width (In.)	Height (In.)	Weight	Qty.	HP
PZWT1S	14,000	36	34	65	450	1	1.3
PZWT1.5S	18,000	36	34	65	500	1	2.0
PZWT2S	22,000	36	34	65	550	1	2.5
PZWT2.5S	28,800	36	34	65	600	1	3.5
PZWT3S	36,000	36	34	65	650	1	4.0
PZWT4S	49,200	46	34	68.5	700	1	5.0
PZWT4.5S	51,600	46	34	68.5	725	1	5.0
PZWT5S	55,200	46	34	68.5	725	1	6.0
PZWT7S	75,600	46	34	68.5	850	1	8.0
PZWT8S	84,000	75	34	70	1000	1	9.0
PZWT9S	98,400	75	34	70	1050	1	10.0
PZWT11S	122,400	75	34	70	1200	1	12.0

Water-Cooled Process Chillers, Packaged, Dual Circuit Scroll, Tankless

Model Number	Nominal BTUH @ 45°F	Length (In.)	Width (In.)	Height (In.)	Weight	Compressor
Model Number	Nominal BTUH @ 45°F	Length (In.)	Width (In.)	Height (In.)	Weight	Qty.	HP
PZW7D	84,800	65	34	36	725	2	4.0
PZW9D	109,000	65	34	36	750	2	5.0
PZW9.5D	113,000	65	34	36	775	2	6.0
PZW10D	132,800	65	34	36	800	2	8.0
PZW13D	173,000	75	34	36	900	2	9.0
PZW15D	196,000	75	34	36	965	2	10.0
PZW18D	230,000	75	34	36	975	2	12.0
PZW22D	279,000	85	34	54	1000	2	12.0
PZW26D	327,000	85	34	54	1950	2	15.0
PZW35D	442,000	85	34	54	2200	2	20.0
PZW43D	534,000	102	34	54	2350	2	25.0
PZW52D	674,000	102	34	54	2500	2	30.0

Water-Cooled Process Chillers, Packaged, Dual Circuit Scroll, with Stainless Steel Tank

Model Number	Nominal BTUH @ 45°F	Length (In.)	Width (In.)	Height (In.)	Weight	Compressor
Model Number	Nominal BTUH @ 45°F	Length (In.)	Width (In.)	Height (In.)	Weight	Qty.	HP
PZWT7D	73,200	75	34	70	1000	2	4.0
PZWT9D	96,000	75	34	70	1100	2	5.0
PZWT9.5D	102,000	75	34	70	1200	2	5.0
PZWT10D	108,000	75	34	70	1250	2	6.0
PZWT13D	147,000	75	34	70	1300	2	8.0
PZWT15D	167,000	85	34	70	1400	2	9.0
PZWT18D	190,800	85	34	70	1600	2	10.0
PZWT22D	240,200	85	34	70	2100	2	12.0

Note: Water-cooled process chiller capacities are based on ARI Standard 45ºF LWT and 105ºF condensing temperature.

For more information, call us toll-free at (877) 988-5464.

Ask about our process chillers.