TWH 212÷342 S/K

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

The TWH 212÷342 S/K 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.
Units are compliant to ErP 2021 European Regulations for comfort cooling application.

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

225-375 kW
64.0-107 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 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 302÷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
SL Unit silencement
RFM Cooling circuit shut-off valve on discharge line
BT Low water temperature kit
HR Desuperheater
HRT 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
FL Flow switch

Technical data

			212	222	242	272	302	342
Cooling	Cooling capacity (1)	kW	225	248	271	302	343	375
	Absorbed power (1)	kW	53	57	64	72	79	88
	EER (1)		4,25	4,35	4,23	4,19	4,34	4,26
Cooling (EN14511)	Cooling capacity (1)	kW	225	248	271	302	343	375
	Absorbed power (1)	kW	53	57	64	72	79	88
	EER (1)		4,25	4,35	4,23	4,19	4,34	4,26
	SEER (2)		5,31	5,52	5,52	5,67	5,58	5,81
	Energy Efficiency (2)	%	204	213	213	219	215	224
Heating	Heating capacity (3)	kW	291	317	345	386	434	474
	Absorbed power (3)	kW	67	74	81	91	102	113
	COP (3)		4,34	4,28	4,26	4,24	4,25	4,19
Heating (EN14511)	Heating capacity (3)	kW	293	319	346	387	436	476
	Absorbed power (3)	kW	69	77	83	93	105	116
	COP (3)		4,25	4,14	4,17	4,16	4,15	4,10
	SCOP (4)		4,93	5,20	5,13	4,97	5,26	5,04
	Energy Efficiency (4)	%	189	200	197	191	202	194
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	10,75	11,85	12,95	14,43	16,39	17,92
	Pressure drops	kPa	38	38	24	27	31	25
	Water connections	DN	125	125	150	150	150	150
Condenser	Water flow	l/s	13,28	14,57	16,01	17,87	20,16	22,12
	Pressure drops	kPa	31	28	31	36	35	36
	Water connections	DN	65	65	65	65	65	65
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	69	70	71	71	72
	With SL accessory (5)	dB(A)	64	65	67	67	67	68
	SSL version (5)	dB(A)	60	61	63	63	63	64
Weights	Transport weight	kg	1370	1399	1544	1554	1819	2024
Weights	Operating weight	kg	1470	1500	1680	1690	1950	2230

Dimensions

			212	222	242	272	302	342
L	STD/SSL	mm	3000	3000	3000	3000	3000	3000
W	STD/SSL	mm	800	800	800	800	1350	1350
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.