TWA/FC 212÷1102 S/K/P

Aircooled liquid Chillers Free-Cooling with axial fans, Scroll compressors and plate exchanger

The liquid Chillers of the TWA/FC 212÷1102 S/K/P series, with R410A refrigerant, provide advanced technology, flexible and reliable, through an intelligent control module which optimizes the operating times and the powers delivered by the Scroll compressors, according to the needs of the systems, both civil and industrial, where the production of chilled water is required in continuous service throughout the year. During the cold months, in FREE-COOLING operating mode, the liquid returning from the system is cooled directly, by way of the forced convection of outside air through the condensing coil, thus reducing the energy required for the Scroll compressors operation that the units are equipped with. A system of 3-way valves, controlled by the electronic microprocessor controller that manages the entire unit, can, depending on outside air temperature, operate in CHILLER, FREE-COOLING or MIXED (CHILLER and FREE-COOLING at the same time) mode. TWA/FC 212÷1102 S/K/P allows the reduction of inrush currents generated, the elimination of inertial accumulation tanks and an excellent silent functioning, as the fans adjust their speed to the actual load of the system, providing great benefits especially at night.
Are available as option the new EC Inverter fans with high available static pressure and efficiency.
The units are compliant to the 2021 ErP Regulation for process cooling application.

On request, units can be supplied with R452B or R454B refrigerant.

Versions

TWA/FC - Cooling only

Power range

208-1102 kW
59.0-313 Ton

Features

Structure with supporting frame, made of galvanised sheet metal with additional protection provided by polyester powder coating.
Axial fans directly coupled to an electric motor with external rotor.
Condenser made of copper tubes and aluminium finned coils combined with FREE-COOLING coils.
Scroll compressors with oil sight glass, internal overheat protection and crankcase heater.
Evaporator AISI 316 stainless steel braze welded plates type 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 302÷1102 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 or magnetothermic switches, thermal protection relays for compressors and thermocontacts for fans.
Condensing Control is included: electronic proportional device that ensures efficient and continuous functioning of the unit with outside air temperature down to –20 °C. It also allows to reduce the sound level especially at night. It consists of a fans speed controller with continuous speed regulation, high and low pressure transducers on cooling circuit and an electrical heater on electrical board.
Microprocessor control and regulation system.

Accessories

Factory fitted accessories

SL Unit silencement
RFM Cooling circuit shut-off valve on discharge line
BT Low water temperature kit
EC EC Inverter fans
ECH EC Inverter fans with high available static pressure
TX Coil with pre-coated fins
PS Single circulating pump
PSI Inverter single circulating pump
PD Double circulating pump
PDI Inverter double circulating pump
SS Soft start
IS Modbus RTU protocol, RS485 serial interface
IST Modbus TCP/IP protocol, Ethernet port
ISB BACnet MSTP protocol, RS485 serial interface
ISBT BACnet IP protocol, Ethernet port
ISL LonWorks protocol, FTT-10 serial interface
ISS SNMP protocol, Ethernet port
IAV Remote set-point, 0-10 V signal
IAA Remote set-point, 4-20 mA signal
IAS Remote signal for second set-point activation
IDL Demand limit from digital input

Loose accessories

MN High and low pressure gauges
CR Remote control panel
RP Coils protection metallic guards
AG Rubber shock absorbers
AM Spring shock absorbers

Technical data

			212	222	242	272	302	342	362	412	442	482	562	622	682	762	862	962	1102
Cooling	Cooling capacity (1)	kW	208	236	263	290	328	365	401	441	483	536	590	665	738	827	920	1014	1102
	Absorbed power (1)	kW	76	87	88	98	108	123	132	147	163	179	199	230	266	305	340	368	412
	EER (1)		2,74	2,71	2,99	2,96	3,04	2,97	3,04	3,00	2,96	2,99	2,96	2,89	2,77	2,71	2,71	2,76	2,67
Cooling (EN14511)	Cooling capacity (1)	kW	206	234	260	287	325	362	398	438	479	532	585	659	731	818	911	1004	1102
	Absorbed power (1)	kW	78	89	91	101	111	126	135	150	167	183	204	236	273	314	349	378	412
	EER (1)		2,64	2,63	2,86	2,84	2,93	2,87	2,95	2,92	2,87	2,91	2,87	2,79	2,68	2,61	2,61	2,66	2,67
	SEPR (2)		5,04	5,03	5,02	5,05	5,01	5,06	5,02	5,51	5,53	5,52	5,54	5,56	5,58	5,55	5,53	5,52	5,51
Free-Cooling cycle	Air temperature (3)	°C	-2,0	-2,8	-2,5	-0,2	-2,7	-3,5	-1,0	-2,0	-1,0	-2,2	-2,7	-3,0	-3,5	-2,5	-0,1	0,1	-0,4
Free-Cooling cycle	Absorbed power (3)	kW	7,0	7,0	10,5	10,5	14,0	14,0	14,0	14,0	17,5	17,5	17,5	17,5	21,0	24,5	28,0	31,5	31,5
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°	4	4	4	4	4	4	4	6	6	8	8	8	8	8	8	8	8
Water circuit.	Water flow	l/s	11,02	12,38	13,87	15,31	17,32	19,34	21,21	23,33	25,52	28,28	31,09	35,11	38,89	43,64	48,52	53,51	58,13
	Pressure drops	kPa	102	126	165	124	112	106	115	100	120	121	132	148	152	172	151	162	173
	Water connections	DN	100	100	100	100	100	100	100	100	100	125	125	125	150	150	150	150	150
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	152	166	187	199	232	249	266	282	332	365	391	438	500	561	622	699	769
	Max. starting current	A	276	299	354	367	365	417	433	415	500	533	558	615	678	774	835	961	1031
Unit with pump	Pump available static pressure	kPa	150	115	70	100	95	80	105	115	85	110	90	60	160	125	125	90	110
Unit with pump	Water connections	DN	100	100	100	100	100	100	100	100	100	125	125	125	150	150	150	150	150
Sound pressure	STD version (4)	dB(A)	70	70	71	73	73	73	74	75	74	74	76	78	78	79	78	78	79
Sound pressure	With SL accessory (4)	dB(A)	68	67	68	70	70	70	71	72	71	71	74	75	75	75	75	75	76
Weights	Transport weight	kg	2175	2185	2360	2435	2990	3020	3220	3510	3920	4180	4220	5060	5240	5830	6880	7410	7530
Weights	Operating weight	kg	2310	2320	2500	2630	3190	3220	3470	3770	4250	4520	4560	5460	5650	6320	7600	8220	8340

Dimensions

			212	222	242	272	302	342	362	412	442	482	562	622	682	762	862	962	1102
L	STD	mm	4000	4000	4000	4000	5000	5000	5000	5000	6200	6200	6200	7200	7200	8400	9600	10600	10600
W	STD	mm	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200
H	STD	mm	2360	2360	2360	2360	2360	2360	2360	2360	2360	2360	2360	2360	2360	2360	2360	2360	2360

Notes

1 Chilled water (with ethylene glycol at 30%) from 15 to 10 °C, ambient air temperature 35 °C.
2 Seasonal energy efficiency of high temperature process cooling according to EU Regulation No. 2016/2281.
3 Ambient air temperature at which the cooling capacity indicated in point (1) is reached.
4 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.