CWW-M/SZ/K 724÷1306

Watercooled liquid Chillers and Heat Pumps with Scroll compressors and shell and tube exchangers

The CWW-M/SZ/K 724÷1306 NEXTPOWER series, with R410A refrigerant, Scroll compressors and shell and tube exchangers, is designed for medium and large industrial systems requiring high power, space-saving units and quiet operation.
These units are ideal for indoor installation reducing the overall dimensions to a minimum while at the same time making installation and maintenance operations easier.
High reliability is the key plus of NEXTPOWER, thanks to the use of components built in large series and the management of several compressors allowing an increased compressor life span and the reduction of machine stopping risks: a faulty compressor will not compromise the functioning of the unit, that will continue to work with decreased power levels.
NEXTPOWER obtains high energy yield with elevated ESEER values; thanks to the high partialization and the intelligent control module, it doesn't require inertial storage tank.

The units feature 460V power supply and 60Hz frequency.

Versions

CWW-M/SZ/K - Cooling only
CWW-M/SZ/K/WP - Reversible Heat Pump

Power range

234-537 kW
67.0-153 Ton

Features

Structure with supporting frame, made of galvanised sheet metal with additional protection provided by polyester powder coating.
Scroll compressors with oil sight glass, internal overheat protection and crankcase heater.
Shell and tube type condenser, with easily removable cast iron heads to enable access for maintenance operations. Each cooling circuit is supplied with an independent condenser. Water connections for cooling tower and Dry-Cooler operation; on request for well water.
Shell and tube type evaporator with two independent circuits on the refrigerant side and one on the water side.
Electronic expansion valve.
R410A refrigerant.
Electrical board includes: main switch with door safety interlock, protection modules and overload protection for compressors.
Microprocessor control and regulation system.

Accessories

Factory fitted accessories

SL Unit silencement
BT Low water temperature kit
HR Desuperheater
HRT Total heat recovery
IS Modbus RTU protocol, RS485 serial interface

Loose accessories

MN High and low pressure gauges
CR Remote control panel
PV2 2-Way electronic pressostatic valve
PV3 3-Way electronic pressostatic valve
AG Rubber shock absorbers
FL Flow switch

Technical data

			724	824	1044	1206	1306
Cooling	Cooling capacity (1)	kW	234	282	353	440	537
Cooling	Absorbed power (1)	kW	52,9	62,1	79,2	95,9	122
Heating	Heating capacity (2)	kW	301	352	453	545	675
Heating	Absorbed power (2)	kW	68,1	79,9	101	123	155
Compressor	Quantity	n°	4	4	4	6	6
	Refrigerant circuits	n°	2	2	2	2	2
	Capacity steps	n°	4	4	4	6	6
Evaporator	Water flow	l/s	11,18	13,47	16,87	21,02	25,66
	Pressure drops	kPa	33	30	36	34	43
	Water connections	DN	150	150	150	150	150
Condenser	Water flow	l/s	13,71	16,44	20,64	25,61	31,49
	Pressure drops	kPa	30	30	44	43	50
	Water connections	DN	65	65	65	80	80
Electrical characteristics	Power supply	V/Ph/Hz	460/3/60	460/3/60	460/3/60	460/3/60	460/3/60
	Max. running current	A	127	157	196	235	293
	Max. starting current	A	282	343	425	422	523
Sound pressure	STD version (3)	dB(A)	64	65	65	66	66
Sound pressure	With SL accessory (3)	dB(A)	60	61	61	62	62
Weights	Transport weight	kg	1484	1499	2106	2259	2883
Weights	Operating weight	kg	1620	1630	2310	2460	3180

Dimensions

			724	824	1044	1206	1306
L	STD	mm	3000	3000	3000	3000	3300
W	STD	mm	800	800	1350	1350	1350
H	STD	mm	1900	1900	1900	1900	1900

Notes

1 Chilled water from 12 to 7 °C, water temperature at the condenser from 30 to 35 °C.
2 Heated water from 40 to 45 °C, water temperature at the evaporator from 15 to 10 °C.
3 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
N.B. (1) Weights of WP version are specified on technical brochure.