EVI HP High efficiency air to water heat pumps with EVI compressors

EVI HP High efficiency air to water heat pumps with EVI compressors
CZT
High efficiency air to water heat pumps with E.V.I. compressors
CZT
-15°C
+63°C
+43°C
E.V.I.
HP
The CZT series of high efficiency heat pumps has been
specifically designed for use with radiant floor heating
systems or those applications where it is necessary to have
maximum efficiency when heating.
The units have been designed for internal installation in
plant rooms and are fitted with centrifugal fans suitable for
connection to ductwork.
They have been optimized on heating mode, are able to
produce water up to 63°C and can operate down to -15°C
ambient temperature.
CZT units are available in 2 or 4 pipe (SW6) versions.
Both versions can produce domestic hot water, in the standard
CZT through the activation of an external 3-way-valve and in
the SW6 version by means of a separate heat exchanger and
hydraulic circuit for the domestic hot water.
All models are supplied as standard with a reversing valve for
defrost and cold water production in summer.
36
OTHER VERSIONS
•
•
CZT 2 pipes reversible standard.
CZT/SW6 4 pipe unit able to produce hot and cold water
at the same time on two independent hydraulic circuits.
ACCESSORIES
•
•
•
•
•
•
•
•
•
•
BRCA: Condensate discharge drip tray with antifreeze
heater.
DSSE: Electronic soft starter.
INSE: Serial interface card RS 485.
KAVG: Rubber anti-vibration mountings.
RAEV: Evaporator antifreeze heater.
RAES: Antifreeze kit.
LS00: Low noise version.
MAML: Refrigerant circuit pressure gauges.
PCRL: Remote control panel.
VTEE: Electronic expansion valve.
CZT
Heating capacity (EN14511) (1)
Total input power (EN14511)(1)
COP (EN14511) (1)
Heating capacity (EN14511) (2)
Total input power (EN14511)(2)
COP (EN14511) (2)
Heating capacity (EN14511) (3)
Total input power (EN14511)(3)
COP (EN14511) (3)
Cooling capacity (EN14511) (4)
Total input power (EN14511)(4)
EER (EN14511) (4)
Cooling capacity (EN14511) (5)
Total input power (EN14511)(5)
EER (EN14511) (5)
Power supply
Max input current
Peak current
Fans / Available static pressure
Compressors
Sound power level (6)
Sound pressure level (7)
Water pump (optional)
Water tank (optional)
kW
kW
W/W
kW
kW
W/W
kW
kW
W/W
kW
kW
W/W
kW
kW
W/W
V/Ph/Hz
A
A
n° / Pa
n° / scroll
dB (A)
dB (A)
kW
l
CZT - CZT/SW6 Models
(1)
Heating capacity (EN14511)
Total input power (EN14511)(1)
COP (EN14511) (1)
Heating capacity (EN14511) (2)
Total input power (EN14511)(2)
COP (EN14511) (2)
Heating capacity (EN14511) (3)
Total input power (EN14511)(3)
COP (EN14511) (3)
Cooling capacity (EN14511) (4)
Total input power (EN14511)(4)
EER (EN14511) (4)
Cooling capacity (EN14511) (5)
Total input power (EN14511)(5)
EER (EN14511) (5)
Power supply
Max input current
Peak current
Fans / Available static pressure
Compressors
Sound power level (6)
Sound pressure level (7)
Water pump (optional)
Water tank (optional)
06
08
6,6
2,0
3,3
6,4
2,3
2,8
4,6
1,9
2,4
6,9
2,5
2,8
4,8
2,3
2,0
230/1/50
18,3
61,8
1/50
1 HP
71
43
0,13
40
8,7
2,5
3,5
8,4
2,9
2,9
5,9
2,3
2,6
9,9
3,0
3,3
7,3
2,7
2,7
230/1/50
22,3
79,8
1/50
1 HP
71
43
0,13
40
21
26
kW
19,6
26,5
kW
5,2
7,4
W/W
3,8
3,6
kW
19,3
26,8
kW
6,0
8,7
W/W
3,2
3,1
kW
14,3
19,1
kW
4,8
6,9
W/W
3,0
2,8
kW
21,4
30,9
kW
6,3
9,1
W/W
3,4
3,4
kW
16,4
22,8
kW
5,8
8,2
W/W
2,8
2,8
V/Ph/Hz 400/3+N/50 400/3/50
A
16,7
21,1
A
103,7
101,8
n° / Pa
1/50
1/50
n° / scroll
1 E.V.I.
1 E.V.I.
dB (A)
77
82
dB (A)
49
54
kW
0,45
0,55
l
60
180
10M
10T
14T
9,6
9,6
13,9
2,8
2,8
3,9
3,4
3,4
3,6
9,6
9,6
14,0
3,0
3,0
3,1
3,2
3,2
4,5
6,8
6,8
10,0
2,6
2,5
3,7
2,6
2,7
2,7
11,3
11,3
15,5
3,4
3,4
4,7
3,3
3,3
3,3
8,5
8,7
11,7
3,1
3,0
4,3
2,7
2,9
2,7
230/1/50 400/3+N/50 400/3+N/50
23,8
9,8
19
100,8
43,8
73,0
1/50
1/50
1/50
1 E.V.I.
1 E.V.I.
1 E.V.I.
72
72
73
44
44
45
0,2
0,2
0,3
40
40
60
36
46
52
37,4
9,6
3,9
36,5
11,1
3,3
25,2
8,7
2,9
42,4
12,0
3,6
30,4
10,8
2,9
400/3/50
28,7
132,5
2/50
1 E.V.I.
82
54
0,55
180
44,7
11,0
4,1
45,4
13,0
3,5
32,4
10,3
3,1
46,6
13,5
3,5
37,3
13,2
2,8
400/3/50
29,3
169,6
2/50
1 E.V.I.
86
58
1,0
300
53,1
12,8
4,1
53,8
15,1
3,6
38,0
11,9
3,2
57,8
16,2
3,6
42,4
14,5
2,9
400/3/50
39,2
119,9
2/50
2 E.V.I.
86
58
1,3
300
Performances refer to the following conditions:
(1)Heating: Ambient temperature 7°C DB, 6°C WB, water temperature 30/35°C.
(6)Sound power level in accordance with ISO 9614 (LS version).
(2)Heating: Ambient temperature 7°C DB, 6°C WB, water temperature 40/45°C.
(3)Heating: Ambient temperature -7°C DB, -8°C WB, water temperature 30/35°C.
(7)Sound pressure level at 10 mt from the unit in free field conditions direction factor Q=2, calculated in
accordance with ISO 9614 (LS version).
CZT
CZT - CZT/SW6 Models
(4)Cooling: ambient temperature 35°C, water temperature 23/18°C.
(5)Cooling: ambient temperature 35°C, water temperature 12/7°C.
37
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CZT
CZT
FRAME
All CZT units are made from hot-galvanised sheet steel, painted with polyurethane
powder enamel and stoved at 180°C to
provide maximum protection against corrosion. The frame is self-supporting with
removable panels. All screws and rivets
used are made from stainless steel. The
standard colour of the units is RAL 9018.
REFRIGERANT CIRCUIT
The refrigerant utilised is R407C. The refrigerant circuit is assembled using internationally recognised brand name components
with all brazing and welding being performer in accordance with ISO 97/23. The refrigerant circuit includes: sight glass, filter
drier, two thermal expansion valves (one for
cooling mode, one for heating mode) with
external equalizer, 4 way reversing valve,
check valves, liquid receiver, Schrader valves for maintenance and control, pressure
safety device (for compliance with PED
regulations). From model size 10 upwards
the circuit also includes an AISI316 stainless steel heat exchanger that is used as
an economizer plus an additional expansion valve for refrigerant vapour injection.
COMPRESSORS
CZT heat pumps from model size 10 upwards utilise scroll compressors that are
equipped with E.V.I. technology, a versatile
method of improving system capacity and
efficiency. EVI stands for “Economised Vapour Injection.” The technology involves injecting refrigerant vapour into the middle of
the compression process, a procedure that
significantly boosts capacity and efficiency.
Each scroll compressor used in these units
is similar to a two-stage compressor with
built-in inter-stage cooling. The process begins when a portion of the condenser liquid
is extracted and expanded through an expansion valve. The low temperature liquid/
gas mixture produced is injected into a heat
exchanger that operates as a sub cooler.
Any liquid is evaporated and the vapour
produced is superheated. The superheated
vapour is then injected into an intermediate
port in the scroll compressor.
This cold vapour reduces the temperature
of the compressed gas thus enabling the
compressor to raise the pressure to levels
(and temperatures) beyond that possible
with a single stage scroll. The additional
sub cooling of the main volume of liquid refrigerant increases the evaporator capacity.
This compressor technology generates a
larger pressure ratio between condensing
and evaporating pressures, with significant
performance improvement. From size 46
upwards, the compressors are connected
in tandem. The compressors are all supplied with a crankcase heater and thermal
overload protection by a klixon embedded
in the motor winding. They are mounted in
a separate enclosure in order to be separated from the air stream thus enabling them
to be maintained even if the unit is operating. Access to this enclosure is via the front
panel of the unit. The crankcase heater is
always powered when the compressor is in
stand-by.
SOURCE HEAT EXCHANGER
The source heat exchanger is made from
3/8” copper pipes and 0,1mm thick aluminium fins with the tubes being mechanically
expanded into the aluminium fins in order
to maximise heat transfer. Furthermore, the
design guarantees a low air side pressure
drop thus enabling the use of low rotation
speed (and hence low noise) fans. The
exchangers can be protected by a metallic
filter that is available as an accessory.
USER HEAT EXCHANGER
The user heat exchanger is a braze welded,
plate type heat exchanger, manufactured
from AISI 316 stainless steel. Utilisation of
this type of exchanger results in a massive
reduction of the refrigerant charge of the
unit compared to a traditional shell-in-tube
type. A further advantage is a reduction in
the overall dimensions of the unit. The exchangers are factory insulated with flexible
close cell material and can be fitted with
an antifreeze heater (accessory). Each exchanger is fitted with a temperature sensor
on the discharge water side for antifreeze
protection.
FANS
The fans are made of galvanized steel,
centrifugal type, double inlet with forward
curved blades. They are connected to the
motors via belts and pulleys, are statically
and dynamically balanced and are supplied
complete with a safety fan guard complying
with the requirements of EN 294. They are
fixed to the unit frame via rubber anti-vibration mountings. As standard, all units are
fitted with a pressure operated fan speed
controller.The electric motors are 4 pole
type rotating at approximately 1500 rpm.
The motors are fitted with integrated ther-
38
mal overload protection and have a moisture protection rating of IP 54.
MICROPROCESSORS
All CZT units are supplied as standard
with microprocessor controls. The microprocessor controls the following functions:
control of the water temperature, antifreeze
protection, compressor timing, compressor
automatic starting sequence (For multiple
compressors), alarm reset. The control
panel is supplied with display showing all
operational icons. The microprocessor is
set for automatic defrost (when operating
in severe ambient conditions) and for summer/ winter change over.
The control also manages the anti-legionella program, the integration with other heating sources (electric heaters, boilers, solar
panels etc), the operation of a three port
modulating valve (for diverting to DHW or
heating) and both the heating circuit pump
and the domestic hot water circuit pump. If
required (available as an option), the microprocessor can be configured in order for it
to connect to a site BMS system thus enabling remote control and management. The
Hidros technical department can discuss
and evaluate, in conjunction with the customer, solutions using MODBUS protocols.
ELECTRIC ENCLOSURE
The enclosure is manufactured in order to
comply with the requirements of the electromagnetic compatibility standards CEE
73/23 and 89/336. Access to the enclosure
is achieved by removing the front panel of
the unit. The following components are supplied as standard on all units: main switch,
thermal overloads (protection of pumps and
fans), compressor fuses, control circuit automatic breakers, compressor contactors,
fan contactors and pump contactors. The
terminal board has volt free contacts for
remote ON-OFF, Summer/Winter change
over and general alarm. For all three phase
units, a sequence relay that disables the
power supply in the event that the phase
sequence is incorrect (scroll compressors
can be damaged if they rotate in the wrong
direction), is fitted as standard.
CONTROL AND PROTECTION DEVICES
All units are supplied with the following
controls and protections: user water return
temperature sensor, antifreeze protection
temperature sensor installed on users water output, domestic hot water supply and
CZT
OTHER VERSIONS
CZT/SW6 UNIT WITH INDEPENDENT
DOMESTIC HOT WATER PRODUCTION
This version is fitted with an additional heat
The water tank is installed on the hot
water outlet water side in order to minimize
fluctuations in the water temperature due
to the compressors cycling at part load
conditions. Also provided in the hydraulic
circuit are an expansion vessel, pressure
relief valve and system isolating valves
with fittings.
exchanger, used as condenser, to produce
domestic hot water irrespective of the
operation mode of the unit. The activation of
the additional heat exchanger is performed
automatically by the microprocessor control
when the domestic hot water temperature,
measured by the sensor, is lower than the
required set point. If, during the summer
months, the unit is operating on cooling,
this version can produce hot and cold water
simultaneously. This version is equipped
with return and supply domestic hot water
sensors and an advanced control panel
with specific software for management of
the system priorities.
CZT/LS LOW NOISE VERSION
This version has acoustic insulation applied
to the unit (both the compressor and its
enclosure) in the form of compressor
jackets and insulating material made with
high density media coated with a heavy
bitumen layer.
CZT
return temperature sensors (only versions
SW6), high pressure manual reset, low
pressure automatic reset, compressor thermal protection, air fan, thermal protection,
pressure transducer (used to optimize the
defrost cycle and to adjust the fan speed
depending on ambient conditions), flow
switch.
All units are also fitted with a temperature
probe sensor with “Energy Saving” function, supplied in a separate plastic box,
which can be used to stop the pump use
during periods of stand-by, when the water
temperature reaches the set point. Doing
this the power consumption of the unit is
strongly reduced.
The probe sensor must be positioned in
the hydraulic compensator present at the
screening technique. The domestic hot
water circuit (only versions SW6) is already
equipped with this probe, but it must be installed in the user circuit.
CZT / A1 HIGH EFFICIENCY HEAT PUMP
WITH INTEGRATED HYDRAULIC KIT
CZT heat pumps have available, as an
option, a built in hydraulic kit that includes:
Water tank in different sizes (depending on
the size of the unit) factory insulated with
flexible close cell material and prepared for
the installation of an antifreeze kit (option)
and a water pump, centrifugal type, suitable
for chilled water operation. The pump is
directly controlled by the microprocessor.
Mod. CZT 10 ÷ 52
Mod. CZT 06 ÷ 08
Water temperature production (°C).
OPERATION LIMITS
70
60
50
40
30
20
- 20
- 10
0
10
20
30
40
50
Ambient temperature (°C).
CZT 2 PIPES VERSION.
CZT/SW6 4 PIPES VERSION.
39
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CZT
CZT - CZT/SW6 Versions
Code
06
08
10M
10T
14M
14T
–
–
–
–
–
–
–
–
–
–
–
–
Main switch
Compressor automatic switch
Flow switch
Pressure control by transducer and modulating damper
DCCI
Fresh air temperature probe for set-point compensation
SOND
Specific software for operation priorities
Remote ON/OFF digital input
CZT
Summer/Winter digital input
Condensate discharge drip tray with antifreeze heater
BRCA
Evaporator antifreeze heater (basic version only)
RAEV
A1 Hydraulic kit (tank and pump)
A1ZZ
A2 Hydraulic kit (tank and 2 pumps)
A2ZZ
A1NT Hydraulic kit (pump only)
A1NT
A2NT Hydraulic kit (2 pumps only)
A2NT
LS Low noise version
LS00
Rubber anti-vibration mountings
KAVG
Antifreeze kit (only for A versions)
RAES
Refrigerant circuit pressure gauges
MAML
Electronic Soft starter
DSSE
Remote control panel
PCRL
Serial interface card RS485 with MODBUS protocol
INSE
Electronic thermostatic valve
VTEE
Standard,
Optional, – Not available.
C
A
B
CZT 06 ÷ 21
40
Mod.
A (mm)
B (mm)
C (mm)
Kg
06/06A
08/08A
10/10A
14/14A
21/21A
989
989
989
1324
1424
1103
1103
1103
1203
1453
650
650
650
694
780
102/155
110/170
128/187
135/217
142/222
CZT
CZT - CZT/SW6 Versions
Code
21
26
36
–
–
–
–
–
–
46
52
Main switch
Compressor automatic switch
Flow switch
Pressure control by transducer and modulating damper
DCCI
Fresh air temperature probe for set-point compensation
SOND
Specific software for operation priorities
Remote ON/OFF digital input
Condensate discharge drip tray with antifreeze heater
BRCA
Evaporator antifreeze heater (basic version only)
RAEV
A1 Hydraulic kit (tank and pump)
A1ZZ
A2 Hydraulic kit (tank and 2 pumps)
A2ZZ
A1NT Hydraulic kit (pump only)
A1NT
A2NT Hydraulic kit (2 pumps only)
A2NT
LS Low noise version
LS00
Rubber anti-vibration mountings
KAVG
Antifreeze kit (only for A versions)
RAES
Refrigerant circuit pressure gauges
MAML
Electronic Soft starter
DSSE
Remote control panel
PCRL
Serial interface card RS485 with MODBUS protocol
INSE
Electronic thermostatic valve
VTEE
CZT
Summer/Winter digital input
Standard,
Optional, – Not available.
C
B
A
CZT 26 ÷ 52
Mod.
A (mm)
B (mm)
C (mm)
Kg
26/26A
36/36A
46/46A
52/52A
1270
1566
1566
1566
1870
2608
2608
2608
850
1105
1105
1105
329/436
343/491
356/516
375/530
41
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