CHAXT/K/AF 726-P÷24012-P

High efficiency air cooled liquid Chillers and Heat Pumps with axial fans, Scroll compressors and plate exchanger

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The CHAXT/K/AF 726-P÷24012-P liquid Chillers and Heat Pumps, with R410A refrigerant, are characterized by high efficiency in cooling and heating.
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.

Versions

CHAXT/K/AF - Cooling only
CHAXT/K/AF/WP - Reversible Heat Pump

Power range

170-586 kW
48.0-167 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.
Cooling circuit shut-off valve on liquid line in 1048-P÷24012-P models.
Electronic expansion valve.
Electronic high and low pressure gauges.
R410A refrigerant.
Electrical board includes: main switch with door safety interlock, fuses or magnetothermic switches, thermal protection relays for compressors and thermocontacts for fans.
Electrical board with dedicated components sizing and ventilation system for unit operation at high outdoor ambient temperature.
Functioning in heating mode with outside air temperature down to -15 °C.
Microprocessor control and regulation system.
Operating outdoor ambient air temperature up to 52 °C.

Accessories

Factory fitted accessories

IM Automatic circuit breakers
RE Adjustable minimum/maximum voltage and phase control relay
SL Unit silencement
RFM Cooling circuit shut-off valve on discharge line
RFL Cooling circuit shut-off valve on liquid line
CT Condensing control down to 0 °C
CC Condensing control down to -20 °C
BT Low water temperature kit
EC EC Inverter fans
DS Desuperheater
RT Total heat recovery
TX Coil with pre-coated fins
EW External water connections
PS Single circulating pump
PSI Inverter single circulating pump
PD Double circulating pump
PDI Inverter double circulating pump
GS Single circulating pump gasket for glycol >30%
GD Double circulating pump gaskets for glycol >30%
FE Antifreeze heater for evaporator
SS Soft start
WM Web Monitoring - Wireless remote monitoring (4G)
IS Modbus RTU protocol, RS485 serial interface
ISBT BACnet IP protocol, Ethernet port
ISB1 BACnet MSTP protocol, RS485 serial interface, BTL certified
ISBT1 BACnet IP protocol, Ethernet port, BTL certified
MTS Master/Slave Network Management
IAV Remote set-point, 0-10V signal
IAA Remote set-point, 4-20mA signal
IAS Remote signal for second set-point activation
IDL Demand limit from digital input
MN High and low pressure gauges
ISS SNMP protocol, Ethernet port

Loose accessories

CR Remote control panel
RP Coils protection metallic guards
AG Rubber shock absorbers
AM Spring shock absorbers

Technical data

			726-P	786-P	826-P	906-P	1048-P	1128-P	1208-P	13010-P	15010-P	16812-P	18012-P	20010-P	24012-P
Cooling	Cooling capacity (1)	kW	170	190	211	232	257	281	309	339	370	414	458	513	586
	Absorbed power (1)	kW	74,2	83,4	92,1	101	115	127	135	151	167	187	206	234	269
	Cooling capacity (2)	kW	197	220	245	271	300	329	361	396	435	485	538	603	692
	Absorbed power (2)	kW	62,0	69,0	76,0	83,0	95,0	105	111	124	137	154	169	192	220
	EER (2)		3,18	3,19	3,22	3,27	3,16	3,13	3,25	3,19	3,17	3,15	3,18	3,14	3,14
Cooling (EN14511)	Cooling capacity (2)	kW	197	220	245	271	300	329	361	396	435	485	538	603	692
	Absorbed power (2)	kW	62,9	70,0	77,0	84,0	96,3	106	112	126	139	155	171	194	222
	EER (2)		3,13	3,14	3,18	3,22	3,11	3,10	3,21	3,15	3,13	3,12	3,15	3,11	3,12
Heating	Heating capacity (3)	kW	214	239	266	295	325	359	391	431	473	526	586	658	754
	Absorbed power (3)	kW	65,0	73,0	81,0	88,0	99,0	109	119	129	143	162	176	202	231
	COP (3)		3,29	3,27	3,28	3,35	3,28	3,29	3,28	3,34	3,31	3,25	3,33	3,26	3,26
Heating (EN14511)	Heating capacity (3)	kW	214	239	266	295	326	360	392	432	474	527	587	659	755
	Absorbed power (3)	kW	66,2	74,4	82,3	89,4	101	111	121	131	146	164	179	209	234
	COP (3)		3,24	3,22	3,24	3,30	3,23	3,25	3,24	3,29	3,26	3,21	3,29	3,16	3,23
Compressor	Quantity	N°	3+3	3+3	3+3	3+3	4+4	4+4	4+4	5+5	5+5	6+6	6+6	5+5	6+6
	Refrigerant circuits	N°	2	2	2	2	2	2	2	2	2	2	2	2	2
	Capacity steps	N°	6	6	6	6	8	8	8	8	8	10	10	8	10
Evaporator	Water flow	l/s	9,39	10,49	11,68	12,92	14,30	15,68	17,21	18,88	20,73	23,12	25,64	28,74	32,98
	Pressure drops	kPa	45,0	49,0	44,0	42,0	50,0	39,0	46,0	49,0	49,0	33,0	41,0	39,0	32,0
	Water connections	DN	80	80	80	80	80	80	80	80	80	150	150	150	150
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
	Max. running current	A	166	179	187	202	239	254	270	291	329	374	397	441	520
	Max. starting current	A	289	311	354	370	371	422	437	423	497	541	564	628	707
Unit with pump	Pump available static pressure	kPa	155	135	200	180	180	180	160	145	125	180	165	155	140
Unit with pump	Water connections	DN	100	100	100	100	100	100	100	100	100	100	100	150	150
Sound pressure	STD version (4)	dB(A)	72	73	74	74	74	74	74	76	76	75	76	77	77
Sound pressure	With SL accessory (4)	dB(A)	69	70	71	71	71	71	72	73	73	72	73	74	74
Weight STD versions	Transport weight	kg	1854	2171	2289	2317	2437	2680	2690	2869	3004	3512	3642	4240	4458
Weight STD versions	Operating weight	kg	1870	2190	2310	2340	2460	2710	2720	2900	3040	3560	3690	4300	4520

Dimensions

			726-P	786-P	826-P	906-P	1048-P	1128-P	1208-P	13010-P	15010-P	16812-P	18012-P	20010-P	24012-P
L	STD	mm	4000	4000	4000	4000	5000	5000	5000	5000	5000	6200	6200	7200	7200
L	SSL	mm	5000	5000	5000	5000	6200	6200	6200	6200	6200	7200	7200	---	---
W	STD	mm	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200
W	SSL	mm	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	---	---
H	STD	mm	2100	2100	2100	2100	2100	2100	2100	2100	2100	2100	2100	2100	2100
H	SSL	mm	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	2200	---	---

Notes

1 Chilled water from 12 to 7 °C, ambient air temperature 46 °C.
2 Chilled water from 12 to 7 °C, ambient air temperature 35 °C.
3 Heated water from 40 to 45 °C, ambient air temperature 7 °C d.b./6 °C w.b.
4 Sound pressure level measured in free field conditions at 1 m from the unit. According to ISO 3744.
N.B. (1) Weights of WP versions are specified on technical brochure.