CHA-M/MK 252÷684

Modular aircooled liquid Chillers and Heat Pumps with axial fans, Scroll compressors and shell and tube exchanger

The liquid Chillers and Heat Pumps of CHA-M/MK 252÷684 MODULAR series, with R410A refrigerant, are designed for medium and large sized service or industrial buildings. They are used, combined with terminal units, for the air conditioning of the rooms.
The MODULAR units feature a dedicated layout of the unit itself and its internal components in order to build big capacity systems through modular combination of single units.
The range is made of 4 base modules from 18 to 51 TON, featuring V design condensing coils, axial fans, single or double cooling circuit with Scroll compressors and shell and tube exchanger.
The electric panel positioned frontally and the optimization of internal layout allow to build multi-unit modular systems of extremely compact footprint.
The multi-unit systems can be centrally controlled with master-slave logic through RS485 ModBus connection that ensure balancing of operation time among the units and backup in case of failure.

Versions

CHA-M/MK - Cooling only
CHA-M/MK/WP - Reversible Heat Pump

Power range

65.0-179 kW
18.0-51.0 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.
Axial fans directly coupled to an electric motor with external rotor.
Condenser made of copper tubes and aluminium finned coils.
Shell & tube type evaporator with one circuit on the refrigerant side and one on the water side in 252÷342 models; with two independent circuits on the refrigerant side and one on the water side in 504÷684 models, complete with water differential pressure switch.
R410A refrigerant.
Electrical board includes: main switch with door safety interlock, fuses, thermal protection relays for compressors and thermocontacts for fans.
Microprocessor control and regulation system.

Accessories

Loose accessories

CR Remote control panel

Technical data

			252	342	504	684
Cooling	Cooling capacity (1)	kW	64,8	89,4	130	179
	Absorbed power (1)	kW	22,1	30,1	44,2	60,2
	EER (1)		2,93	2,97	2,93	2,97
Cooling (EN14511)	Cooling capacity (1)	kW	64,5	89,0	129	178
	Absorbed power (1)	kW	22,4	30,5	44,8	61,0
	EER (1)		2,87	2,91	2,87	2,91
Heating	Heating capacity (2)	kW	72,8	99,2	146	198
	Absorbed power (2)	kW	24,1	31,6	48,2	63,2
	COP (2)		3,02	3,14	3,02	3,14
Heating (EN14511)	Heating capacity (2)	kW	73,1	99,7	146	199
	Absorbed power (2)	kW	24,5	32,3	49,0	64,6
	COP (2)		2,98	3,09	2,98	3,09
Compressor	Quantity	n°	2	2	4	4
	Refrigerant circuits	n°	1	1	2	2
	Capacity steps	n°	2	2	4	4
Evaporator	Water flow	l/s	3,10	4,27	6,21	8,60
	Pressure drops	kPa	25	35	25	35
	Water connections	"G	2"	2"	2"	2"
Electrical characteristics	Power supply	V/Ph/Hz	400/3/50	400/3/50	400/3/50	400/3/50
	Max. running current	A	53,5	66,6	107	133
	Max. starting current	A	170	235	340	470
Sound pressure	(3)	dB(A)	60	60	62	62
Weights	Transport weight	kg	622	687	1263	1393
Weights	Operating weight	kg	650	720	1320	1460

Dimensions

			252	342	504	684
L	STD	mm	2200	2200	2200	2200
W	STD	mm	1100	1100	2200	2200
H	STD	mm	2045	2045	2045	2045

Notes

1 Chilled water from 12 to 7 °C, ambient air temperature 35 °C.
2 Heated water from 40 to 45 °C, ambient air temperature 7 °C d.b./6 °C w.b.
3 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
N.B. (1) Weights of WP version are specified on technical brochure.