TWA/FC 251÷1502 TT/Y

AIRCOOLED LIQUID CHILLERS FREE-COOLING WITH AXIAL FANS, TURBOCOR (MAGNETIC LEVITATION) COMPRESSORS AND FLOODED SHELL AND TUBE EXCHANGER

The innovative TWA/FC 251÷1502 TT/Y units, with R134a refrigerant and FREE-COOLING technology, are designed to provide an effective solution to installation requirements of large areas, both commercial and industrial, where the production of chilled water is required in continuous service throughout the year. The unit, designed with specific attention to every aspect of construction and combined with the use of TURBOCOR dynamic partialization oil-free magnetic levitation compressors - managed by the TURBOSOFT self-adaptive electronic control - and with the use of flooded shell and tube evaporator, achieves a high rate of energy efficiency, with unequaled SEPR values, with minimum water content, and an excellent silent functioning. Depending on outside air temperature, the microprocessor controller manages the functioning in CHILLER, FREE-COOLING or MIXED (both CHILLER and FREE-COOLING) mode.
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 R513A refrigerant.

Versions

TWA/FC - Cooling only

Power range

246-1443 kW
70.0-410 Ton

Features

Structure with supporting frame, made of galvanised sheet metal with additional protection provided by polyester powder coating.
Semi-hermetic centrifugal compressors with dual Turbocor turbine, oil free, magnetic rising rotor, thermal protection, continuous capacity adjustment system thanks to built-in INVERTER, automatic anti-cavitation system. The power circuit of the compressor is fitted with a set of electrolytic condensers to control the rising in the event of a power failure, reactor for the power factor correction, EMI filter for electromagnetic compatibility.
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.
High efficiency flooded shell and tube type evaporator, with one or two independent circuits on the refrigerant side and one on the water side, complete with water differential pressure switch.
Cooling circuit shut-off valves on suction, discharge and liquid line.
Electronic expansion valve.
Electronic high and low pressure gauges.
R134a refrigerant. On request R513A refrigerant.
Electrical board includes: main on-off switch with door lock, fuses, electronic/digital overload device to protect the compressors and thermocontacts for fans, interface relay and terminals for external connections.
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.
TURBOSOFT control and regulation system, equipped with RS485 serial interface, can be supplied with an optional Web Monitoring device for remote monitoring via GPRS/EDGE/3G/TCP-IP network.

Accessories

Factory fitted accessories

IM Automatic circuit breakers
EC EC Inverter fans
ECH EC Inverter fans with high available static pressure
HRT/P Total heat recovery in parallel
TX Coil with pre-coated fins
PU Single circulating pump
PD Double circulating pump
TS Touch Screen Interface
WM Web Monitoring - Wireless remote monitoring (GPRS/EDGE/3G/TCP-IP)
IST Modbus TCP/IP protocol, Ethernet port
ISB BACnet MSTP protocol, RS485 serial interface
ISBT BACnet TCP/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
CP Potential free contacts

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
FL Flow switch

Technical data

			251	291	341	411	641	801	981	1101	1291	1501	522	642	802	982	1102	1292	1502	521
Cooling	Cooling capacity (1)	kW	246	281	333	400	588	696	869	1046	1229	1443	495	588	696	869	981	1229	1443	495
	Absorbed power (1)	kW	71	80	94	116	171	204	257	307	357	425	143	171	204	257	280	357	425	143
	EER (1)		3,46	3,51	3,54	3,45	3,44	3,41	3,38	3,41	3,44	3,40	3,46	3,44	3,41	3,38	3,50	3,44	3,40	3,46
Cooling (EN14511)	Cooling capacity (1)	kW	244	279	331	397	582	690	861	1033	1211	1421	491	582	690	861	970	1211	1421	491
	Absorbed power (1)	kW	73	82	96	119	177	210	265	321	375	447	147	177	210	265	291	375	447	147
	EER (1)		3,34	3,40	3,45	3,34	3,29	3,29	3,25	3,22	3,23	3,18	3,34	3,29	3,29	3,25	3,33	3,23	3,18	3,34
	SEPR (2)		7,29	7,38	7,07	7,02	7,19	7,04	7,23	7,04	7,23	7,22	7,40	7,19	7,04	7,23	7,04	7,23	7,22	7,40
Free-Cooling cycle	Air temperature (3)	°C	-2,5	0,5	-2,9	0,0	-2,3	-0,5	-0,2	1,0	1,0	1,0	-2,8	-2,3	-0,5	-0,2	1,5	1,0	1,0	-2,8
Free-Cooling cycle	Absorbed power (3)	kW	10,8	10,8	10,8	14,4	21,6	21,6	25,2	32,4	36,0	36,0	18,0	21,6	21,6	25,2	32,4	36,0	36,0	18,0
Compressor	Quantity	n°	1	1	1	1	2	2	2	3	4	4	2	2	2	2	4	4	4	2
	Refrigerant circuits	n°	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2	2	2	1
	Capacity steps	n°	Stepless	Stepless	Stepless	Stepless	Stepless	Stepless	Stepless	Stepless	Stepless	Stepless	Stepless	Stepless	Stepless	Stepless	Stepless	Stepless	Stepless	Stepless
	Water flow	l/s	12,69	14,50	17,18	20,64	30,34	35,91	44,84	53,97	63,42	74,46	25,54	30,34	35,91	44,84	50,62	63,42	74,46	25,54
	Pressure drops	kPa	92	97	88	105	155	125	144	220	256	275	115	155	125	144	188	256	275	115
	Water connections	DN	100	100	100	125	150	150	150	150	200	200	125	150	150	150	150	200	200	125
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	400/3/50
	Max. running current	A	168	168	168	262	337	509	517	763	658	1002	329	337	509	517	650	658	1002	329
	Max. starting current	A	25	25	25	33	194	280	288	534	515	773	186	194	280	288	507	515	773	186
Unit with pump	Pump available static pressure	kPa	135	125	115	110	140	155	105	160	205	145	150	140	155	105	200	205	145	150
Unit with pump	Water connections	DN	100	100	100	125	150	150	150	150	200	200	125	150	150	150	150	200	200	125
Sound pressure	STD version (4)	dB(A)	68	68	69	69	70	70	69	70	70	70	69	70	70	69	70	71	71	69
Weights	Transport weight	kg	3040	3200	3600	3700	5150	5500	7700	8800	10000	10300	4700	5400	5700	7800	9100	10200	10500	4620
Weights	Operating weight	kg	3180	3360	3810	3930	5400	5810	8080	9250	10480	10790	4930	5650	6010	8180	9550	10680	10990	4850

Dimensions

			251	291	341	411	641	801	981	1101	1291	1501	522	642	802	982	1102	1292	1502	521
L	STD	mm	4000	4000	5000	5000	7200	7200	8400	10050	11100	11100	6200	7200	7200	8400	10050	11100	11100	6200
W	STD	mm	2200	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	2750	2750	2750	2750	2360	2360	2360	2750	2750	2750	2750	2360

Notes

1 Chilled water (with ethylene glycol at 30%) from 15 to 10 °C, ambient air temperature 35 °C.
2 Efficienza energetica stagionale di raffreddamento di processo ad alta temperatura secondo il Regolamento UE n. 2016/2281.
3 Ambient air temperature at wich 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.