CHA-M/SZ/K 724-P÷1306-P

Aircooled liquid Chillers and Heat Pumps with axial fans, Scroll compressors and plate exchanger

The models of NEXTPOWER range are dedicated to conditioning of medium and wide areas. The intelligent control module optimizes functioning times and supplied power from compressors based on heat load demands in the system.
The range is equipped with R410A refrigerant and features Scroll compressors and plate exchanger.
High reliability is the key plus of NEXTPOWER, thanks to the use of components built in large series and the management of several compressors allowing an increased compressor life span and the reduction of machine stopping risks: a faulty compressor will not compromise the functioning of the unit, that will continue to work with decreased power levels. The optional Air Section Divider allows to service one circuit without stopping the whole unit.
NEXTPOWER obtains high energy yield with high ESEER values and excellent silent
functioning, since the fans adjust their speed to the actual system load, providing benefits
in terms of silent operation, important especially at night.
NEXTPOWER, thanks to the high partialization and the intelligent control module, doesn't require inertial storage tank.

The units feature 460V power supply and 60Hz frequency.

Versions

CHA-M/SZ/K - Cooling only
CHA-M/SZ/K/WP - Reversible Heat Pump

Power range

218-512 kW
62.0-146 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.
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. On the Heat Pump units it is always installed an antifreeze heater.
Electronic expansion valve.
R410A refrigerant.
Electrical board includes: main switch with door safety interlock, protection modules, overload protection for compressors and thermocontacts for fans.
Microprocessor control and regulation system.

Accessories

Factory fitted accessories

SL Unit silencement
CT Condensing control down to 0 °C
BT Low water temperature kit
DS Desuperheater
RT Total heat recovery
TX Coil with pre-coated fins
AD Air section divider
IS Modbus RTU protocol, RS485 serial interface

Loose accessories

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

Technical data

			724-P	824-P	1044-P	1206-P	1306-P
Cooling	Cooling capacity (1)	kW	218	292	366	442	512
Cooling	Absorbed power (1)	kW	76	100	121	156	194
Heating	Heating capacity (2)	kW	253	336	405	500	593
Heating	Absorbed power (2)	kW	82,2	109	129	166	191
Compressor	Quantity	n°	4	4	4	6	6
	Refrigerant circuits	n°	2	2	2	2	2
	Capacity steps	n°	4	4	4	6	6
Evaporator	Water flow	l/s	10,42	13,95	17,49	21,12	24,46
	Pressure drops	kPa	53	64	62	52	48
	Water connections	DN	100	100	100	100	100
Electrical characteristics	Power supply	V/Ph/Hz	460/3/60	460/3/60	460/3/60	460/3/60	460/3/60
	Max. running current	A	140	170	217	255	314
	Max. starting current	A	296	357	445	448	543
Sound pressure	STD version (3)	dB(A)	67	68	68	69	70
Sound pressure	With SL accessory (3)	dB(A)	64	65	65	66	67
Weights	Transport weight	kg	1543	1634	2192	2318	2510
Weights	Operating weight	kg	1580	1675	2240	2370	2565

Dimensions

			724-P	824-P	1044-P	1206-P	1306-P
L	STD	mm	2800	2800	3900	3900	3900
W	STD	mm	2200	2200	2200	2200	2200
H	STD	mm	2100	2100	2100	2100	2100

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.