TWH 212÷342 S/K/P

Watercooled liquid Chillers and Heat Pumps with Scroll compressors and plate exchangers

The TWH 212÷342 S/K/P 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. A wide range of accessories, factory fitted or supplied separately, complete the outstanding versatility and functionality of the series.
The units are compliant to the ErP Regulation.

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

Versions

TWH - Cooling only
TWH/WP - Reversible Heat Pump
TWH/SSL - Super silenced cooling only
TWH/WP/SSL - Super silenced reversible Heat Pump

Power range

224-383 kW
64.0-109 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.
Condenser AISI 316 stainless steel braze welded plates type with two independent circuits on the refrigerant side and one on the water side.
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÷36012-P 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
SL Unit silencement
RFM Cooling circuit shut-off valve on discharge line
BT Low water temperature kit
DS Desuperheater
RT Total heat recovery
FE Antifreeze heater for evaporator
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
PV2 2-Way electronic pressostatic valve
PV3 3-Way electronic pressostatic valve
AG Rubber shock absorbers
AM Spring shock absorbers

Technical data

			212	222	242	272	302	342
Cooling	Cooling capacity (1)	kW	224	250	274	308	345	383
	Absorbed power (1)	kW	52	57	63	70	78	86
	EER (1)		4,31	4,39	4,35	4,40	4,42	4,45
Cooling (EN14511)	Cooling capacity (1)	kW	223	249	273	307	343	382
	Absorbed power (1)	kW	55	60	66	74	82	90
	EER (1)		4,08	4,16	4,11	4,17	4,20	4,26
	SEER (2)		5,27	5,52	5,56	5,87	5,61	5,99
	Energy Efficiency (2)	%	203	213	214	227	216	232
Heating	Heating capacity (3)	kW	290	320	349	394	437	484
	Absorbed power (3)	kW	66	74	80	88	101	111
	COP (3)		4,39	4,32	4,36	4,48	4,33	4,36
Heating (EN14511)	Heating capacity (3)	kW	291	321	350	396	438	485
	Absorbed power (3)	kW	67,5	77,5	81,4	89,8	102	112
	COP (3)		4,31	4,14	4,30	4,41	4,29	4,33
	SCOP (4)		5,23	5,36	5,49	5,50	5,77	5,71
	Energy Efficiency (4)	%	201	206	212	212	223	220
Compressor	Quantity	n°	3+3	3+3	3+3	3+3	4+4	4+4
	Refrigerant circuits	n°	2	2	2	2	2	2
	Capacity steps	n°	6	6	6	6	8	8
Evaporator	Water flow	l/s	10,70	11,94	13,09	14,72	16,48	18,30
	Pressure drops	kPa	54	51	56	56	60	47
	Water connections	DN	80	80	80	80	80	80
Condenser	Water flow	l/s	13,19	14,67	16,10	18,06	20,21	22,41
	Pressure drops	kPa	70	74	81	76	67	59
	Water connections	DN	80	80	80	80	80	80
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
	Max. running current	A	136	151	163	176	201	218
	Max. starting current	A	261	284	331	344	334	385
Sound pressure	STD version (5)	dB(A)	68	70	71	71	71	72
	With SL accessory (5)	dB(A)	65	66	67	67	67	68
	SSL version (5)	dB(A)	61	62	63	63	63	64
Weights	Transport weight	kg	1047	1103	1123	1159	1352	1422
Weights	Operating weight	kg	1080	1140	1160	1200	1400	1480

Dimensions

			212	222	242	272	302	342
L	STD/SSL	mm	2500	2500	2500	2500	3000	3000
W	STD/SSL	mm	800	800	800	800	800	800
H	STD/SSL	mm	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.