CWW/K 726÷36012

Water cooled liquid Chillers and Heat Pumps with Scroll compressors and shell and tube exchangers

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The CWW/K 726÷36012 series liquid Chillers and Heat Pumps, with R410A refrigerant, are designed for medium and large domestic or industrial systems which require medium-high power, space-saving units and quiet operation. These units are ideal for indoor installation and, equipped with a self contained structure, they reduce the overall dimensions to a minimum while at the same time making installation and maintenance operations easier.
The units are characterized by multi-compressor design on double cooling circuit, to reach high energy performances, reduction of current at start-up, elimination of inertial tanks and excellent silent functioning. The use of components built in large series makes them highly reliable and the management of a high number of compressors allows increased life span with reduction of machine stopping risks and easier maintenance operations.

The units 726÷1128 are compliant to the ErP Regulation; the units 1208÷36012 are not compliant to the ErP Regulation.
On request, units can be supplied with R452B or R454B refrigerant.

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 two independent circuits on the refrigerant side and one on the water side.
Shell and tube evaporator with two independent circuits on the refrigerant side and one on the water side, complete with water differential pressure switch.
Cooling circuit shut-off valve on liquid line in 1048÷36012 models.
Electronic expansion valve.
Electronic high and low pressure gauges.
R410A refrigerant. On request R452B or R454B refrigerant.
Electrical board includes: main switch with door safety interlock, fuses, thermal protection relays for compressors, interface relay and terminals for external connections.
Microprocessor control and regulation system.

Accessories

Factory fitted accessories

IM Automatic circuit breakers
RE Adjustable minimum/maximum voltage and phase control relay
SL Unit silencement
RFM Cooling circuit shut-off valve on discharge line
RFL Cooling circuit shut-off valve on liquid line
PV2 2-Way electronic pressostatic valve
PV3 3-Way electronic pressostatic valve
BT Low water temperature kit
HR Desuperheater
HRT/P Total heat recovery in parallel
FE Antifreeze heater for evaporator
SS Soft start
DPH Device for heating only Heat Pump operation
WM Web Monitoring - Wireless remote monitoring (4G)
IS Modbus RTU protocol, RS485 serial interface
IST Modbus TCP/IP protocol, Ethernet port
ISBT BACnet IP protocol, Ethernet port
ISB1 BACnet MSTP protocol, RS485 serial interface, BTL certified
ISBT1 BACnet IP protocol, Ethernet port, BTL certified
ISS SNMP protocol, Ethernet port
MTS Master/Slave Network Management
IAV Remote set-point, 0-10V signal
IAA Remote set-point, 4-20mA signal
IAS Remote signal for second set-point activation
IDL Demand limit from digital input
IVV 0-10V signal for the management of the electronic pressostatic valve source side
MN High and low pressure gauges

Loose accessories

CR Remote control panel
AG Rubber shock absorbers
AM Spring shock absorbers
FL Flow switch

Technical data

			726	786	826	906	1048	1128	1208	13010	15010	16812	18012	21012	24012	27012	30012	33012	36012
Cooling	Cooling capacity (1)	kW	225	248	271	302	343	375	422	464	511	579	628	710	801	913	1035	1152	1254
	Absorbed power (1)	kW	53	57	64	72	79	88	94	107	117	132	146	159	181	208	233	264	290
	EER (1)		4,25	4,35	4,23	4,19	4,34	4,26	4,49	4,34	4,37	4,39	4,30	4,47	4,43	4,39	4,44	4,36	4,32
Cooling (EN14511)	Cooling capacity (1)	kW	225	248	271	302	343	375	422	464	511	579	628	710	801	913	1035	1152	1254
	EER (1)		4,25	4,35	4,23	4,19	4,34	4,26	4,49	4,34	4,37	4,39	4,30	4,44	4,40	4,39	4,44	4,35	4,31
	SEER (2)		5,31	5,52	5,52	5,67	5,58	5,81	6,26	6,03	6,19	6,11	6,04	6,02	6,25	6,22	6,29	6,22	6,16
	Energy Efficiency (2)	%	204	213	213	219	215	224	242	233	240	236	234	233	242	241	244	241	238
Heating	Heating capacity (3)	kW	291	317	345	386	434	474	534	586	642	731	791	891	1005	1135	1280	1419	1546
	Absorbed power (3)	kW	67	74	81	91	102	113	118	139	147	168	183	206	231	264	292	325	361
	COP (3)		4,34	4,28	4,26	4,24	4,25	4,19	4,53	4,22	4,37	4,35	4,32	4,33	4,35	4,30	4,38	4,37	4,28
Heating (EN14511)	Heating capacity (3)	kW	293	319	346	387	436	476	536	589	644	734	794	894	1009	1140	1287	1425	1554
	COP (3)		4,25	4,14	4,17	4,16	4,15	4,10	4,43	4,12	4,26	4,24	4,20	4,22	4,24	4,18	4,25	4,25	4,17
	SCOP (4)		4,93	5,20	5,13	4,97	5,26	5,04	5,28	5,31	5,16	4,96	5,92	4,34	6,03	4,76	6,07	4,99	5,82
	Energy Efficiency (4)	%	189	200	197	191	202	194	203	204	198	190	229	166	233	182	235	192	225
Compressor	Quantity	N°	3+3	3+3	3+3	3+3	4+4	4+4	4+4	5+5	5+5	6+6	6+6	6+6	6+6	6+6	6+6	6+6	6+6
	Refrigerant circuits	N°	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2
	Capacity steps	N°	6	6	6	6	8	8	8	8	8	10	10	10	10	10	10	10	10
Evaporator	Water flow	l/s	10,75	11,85	12,95	14,43	16,39	17,92	20,16	22,17	24,41	27,66	30,00	33,92	38,27	43,62	49,45	55,04	59,91
	Pressure drops	kPa	38	38	24	27	31	25	25	36	31	34	34	27	38	38	59	45	53
	Water connections	DN	125	125	150	150	150	150	150	150	150	150	150	150	150	200	200	200	200
Condenser	Water flow	l/s	13,28	14,57	16,01	17,87	20,16	22,12	24,65	27,28	30,00	33,97	36,98	41,52	46,92	53,56	60,58	67,65	73,77
	Pressure drops	kPa	31	28	31	36	35	36	31	35	44	42	47	49	43	55	30	35	40
	Water connections	DN	65	65	65	65	65	65	65	80	80	80	80	80	80	80	100	100	100
Electrical characteristics	Power supply	V/Ph/Hz	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50	400/3/50
	Max. running current	A	136	151	163	176	201	218	234	251	293	326	352	399	454	506	559	629	699
	Max. starting current	A	261	284	331	344	334	385	402	384	461	494	519	576	631	720	773	891	961
Sound pressure	STD version (5)	dB(A)	68	69	70	71	71	72	72	72	73	73	74	78	78	79	80	80	80
	With SL accessory (5)	dB(A)	64	65	67	67	67	68	68	68	69	69	69	74	74	75	76	76	76
	SSL version (5)	dB(A)	60	61	63	63	63	64	64	64	65	65	64	70	70	71	72	72	73
Weights	Transport weight	kg	1370	1399	1544	1554	1819	2024	2076	2449	2493	2728	2863	3568	3446	3772	4300	4370	4440
Weights	Operating weight	kg	1470	1500	1680	1690	1950	2230	2280	2650	2700	2960	3160	3950	3800	4110	4650	4720	4790

Dimensions

			726	786	826	906	1048	1128	1208	13010	15010	16812	18012	21012	24012	27012	30012	33012	36012
L	STD/SSL	mm	3000	3000	3000	3000	3000	3000	3000	3000	3000	3300	3300	3300	4000	4000	4000	4000	4000
W	STD/SSL	mm	800	800	800	800	1350	1350	1350	1350	1350	1350	1350	1350	1350	1350	1350	1350	1350
H	STD/SSL	mm	1900	1900	1900	1900	1900	1900	1900	1900	1900	1900	1900	1900	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 Seasonal energy efficiency of cooling at low temperature. According to EU Regulation n. 2016/2281.
3 Heated water from 40 to 45 °C, water temperature at the evaporator from 15 to 10 °C.
4 Seasonal energy efficiency of heating at low temperature with average climatic conditions. According to EU Regulation n. 813/2013.
5 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
N.B. (1) Weights of SSL and WP versions are specified on technical brochure.