Page 28
Page 29
English
10
10
H
D
G
5
5
2
8
A
A
AT
6
3
7
4
BT
9
ON
AT
5
UNIT
CONTROL
EXV
CONTROL
A
1
1
OIL EQUAL.
OIL EQUAL.
H
D
2
3
4
5
6
7
11
9
8
BT
A
C
ON
E
F
G
12
12
G
G
G
UNIT
CONTROL
EXV
CONTROL
S
S
S
S
S
S
S
S
General Description
The hydraulic connections to the evaporator are of 2”
1
/
2
Victaulic type on 504 – 804 units and 3” Victaulic
type on 904 – 1204 units.
7.6 Air heat exchanger
Coils are made of copper pipes in staggered rows,
mechanically expanded inside an aluminium finned
pack.
7.7 Fans
Fans are of directly coupling propeller type, provi-
ded with aluminium blade with wing profile.
Each fan is provided with galvanised steel accident-
prevention guard.
Finally, motors are completely closed, protection
class IP54, protection thermostat immersed in win-
dings.
VLS refrigeration diagram
D
G
5
5
2
A
A
AT
AT
5
A
1
1
OIL EQUAL.
OIL EQUAL.
D
2
3
4
5
6
BT
A
C
E
F
G
7
7
3
4
BT
EXV
CONTROL
UNIT
CONTROL
EXV
CONTROL
UNIT
CONTROL
S
S
S
S
S
S
VLH refrigeration diagram
Safety /control devices:
A - High Pressure switch (42 bar)
AT - High Pressure transducer
BT - Low Pressure transducer
C - Water differential pressure switch (105 bar)
D - Air temperature sensor
E - Outlet water temperature sensor
F - Inlet water temperature sensor
Components:
1) Compressor Tandem Scroll Type
2) Air cooled condenser
3) Filter Drier
4) Electronic expansion valve
5) Globe valve
6) Heat exchanger (dual type)
7) Desuperheathers (optional)
Components:
1) Compressor Tandem Scroll Type
2) Air cooled condenser
3) Filter Drier
4) Electronic expansion valve
5) Globe valve
6) Check valve
7) Liquid receiver
8) Four-way valve
9) Suction accumulator
10) Sight glass
11) Heat exchanger (dual type)
12) Desuperheathers (optional)
G - PED pressure relief valve (46 bar)
S - 5/16” Shrader connenction
(service only)
Pipe connection with Shrader Valve
Safety /control devices:
A - High Pressure switch (42 bar)
AT - High Pressure transducer
BT - Low Pressure transducer
C - Water differential pressure switch (105 bar)
D - Air temperature sensor
E - Outlet water temperature sensor
F - Inlet water temperature sensor
G - PED pressure relief valve (46 bar)
H - Defrost temperature sensor
S - 5/16” Shrader connenction (service only)
Pipe connection with Shrader Valve
Page 29
English
10
10
H
D
G
5
5
2
8
A
A
AT
6
3
7
4
BT
9
ON
AT
5
UNIT
CONTROL
EXV
CONTROL
A
1
1
OIL EQUAL.
OIL EQUAL.
H
D
2
3
4
5
6
7
11
9
8
BT
A
C
ON
E
F
G
12
12
G
G
G
UNIT
CONTROL
EXV
CONTROL
S
S
S
S
S
S
S
S
General Description
The hydraulic connections to the evaporator are of 2”
1
/
2
Victaulic type on 504 – 804 units and 3” Victaulic
type on 904 – 1204 units.
7.6 Air heat exchanger
Coils are made of copper pipes in staggered rows,
mechanically expanded inside an aluminium finned
pack.
7.7 Fans
Fans are of directly coupling propeller type, provi-
ded with aluminium blade with wing profile.
Each fan is provided with galvanised steel accident-
prevention guard.
Finally, motors are completely closed, protection
class IP54, protection thermostat immersed in win-
dings.
VLS refrigeration diagram
D
G
5
5
2
A
A
AT
AT
5
A
1
1
OIL EQUAL.
OIL EQUAL.
D
2
3
4
5
6
BT
A
C
E
F
G
7
7
3
4
BT
EXV
CONTROL
UNIT
CONTROL
EXV
CONTROL
UNIT
CONTROL
S
S
S
S
S
S
VLH refrigeration diagram
Safety /control devices:
A - High Pressure switch (42 bar)
AT - High Pressure transducer
BT - Low Pressure transducer
C - Water differential pressure switch (105 bar)
D - Air temperature sensor
E - Outlet water temperature sensor
F - Inlet water temperature sensor
Components:
1) Compressor Tandem Scroll Type
2) Air cooled condenser
3) Filter Drier
4) Electronic expansion valve
5) Globe valve
6) Heat exchanger (dual type)
7) Desuperheathers (optional)
Components:
1) Compressor Tandem Scroll Type
2) Air cooled condenser
3) Filter Drier
4) Electronic expansion valve
5) Globe valve
6) Check valve
7) Liquid receiver
8) Four-way valve
9) Suction accumulator
10) Sight glass
11) Heat exchanger (dual type)
12) Desuperheathers (optional)
G - PED pressure relief valve (46 bar)
S - 5/16” Shrader connenction
(service only)
Pipe connection with Shrader Valve
Safety /control devices:
A - High Pressure switch (42 bar)
AT - High Pressure transducer
BT - Low Pressure transducer
C - Water differential pressure switch (105 bar)
D - Air temperature sensor
E - Outlet water temperature sensor
F - Inlet water temperature sensor
G - PED pressure relief valve (46 bar)
H - Defrost temperature sensor
S - 5/16” Shrader connenction (service only)
Pipe connection with Shrader Valve
ITELCO INDUS MAN VLS_C NEW Bianca 15 03/09/10 12:16:25 Black
ITELCO INDUS MAN VLS_C NEW Bianca 15 03/09/10 12:16:25 Cyan
ITELCO INDUS MAN VLS_C NEW Bianca 15 03/09/10 12:16:25 Magenta
ITELCO INDUS MAN VLS_C NEW Bianca 15 03/09/10 12:16:25 Yellow
AIRWELL IT_VLS MINOLTA Bianca 15 12/17/10 16:48:10 Black
Page 28
Options
Description
General Description
7 GENERAL DESCRIPTION
7.1 Introduction
The VLS/VLH units are water chillers /air-water heat
pumps provided with hermetic scroll compressors
with two refrigeration circuits.
These units are fit for cooling and heating intermedia-
te fluids (glycoled water), for air-conditioning appli-
cations in industrial processes.
These units can be installed outdoor on the roof of a
building or at ground level.
This series includes the following versions:
Version (STD/HSE
1
)
Description
VLS/VLH Base Low Noise version (BLN
2
)
VLS/VLH Low Noise version (LN)
VLS/VLH Extra Low Noise version (ELN)
VLS/VLH High Temperature version (HET)
Air condensing chillers/heat pumps, using
R410A refrigerant.
1
High efficiency Units (HSE) with inverter fans
2
A High Pressure Fan (HPF) version is available
For each VLS version, the corresponding condensing unit version (VLC) is available
Available options:
VLS/D
VLH/D
VLR
The heat recovery is carried out by a desuperheater mounted on the compressor’s
discharge line.
7.2 General specifications
The VLS/VLH units are supplied complete and provi-
ded with all connecting pipes for the refrigerant and
internal wiring.
The refrigeration circuit of each unit undergoes a
pressure test, is drained, vacuumised, dehydrated
and filled with refrigerant, and includes the neces-
sary oil. Once assembled, each unit is subjected to a
complete final testing and the correct operation of all
refrigeration circuits is checked.
The base and the frame of each unit are made of ve-
ry thick galvanised sheet, and are secured by screw
and stainless bolts. All panels are secured by screw
and tropicalised steel bolts, they can be disassem-
bled for easy access to internal components.
All galvanised steel parts are painted with white
polyester resin (RAL 9001), to ensure the resistance
of the unit to corrosion and weather agents over time.
7.3 Compressors
These units are provided with hermetic scroll com-
pressors, with built-in motor protection.
Compressors are mounted on shock absorbers to
reduce vibrations. Motors are of direct start-up type,
cooled by the sucked refrigerant gas.
Thermistors protect the windings from any overtem-
peratures and the electronic control checks that the
delivery temperature is within the permissible range.
The capacity control, as well as the control of the de-
livered cooling capacity, are always ensured by the
electronic control.
7.4 Refrigeration circuits
Each unit has two complete refrigeration circuits, in-
cluding: a service valve to fill the unit with refrige-
rant, shut-off valves, thermostatic expansion valve,
dehydrating filter, sight glass with humidity indicator,
a differential pressure switch for the water.
The outdoor VLC units, deriving from the VLS versions,
are marked by the absence of the evaporator, and
are equipped with shutoff cocks on the suction line
and on the liquid line, so as to allow the connection
of remote evaporators.
Furthermore, each circuit is equipped with safety de-
vices in accordance with PED 2014/68/EU: HP and LP
pressure switches, safety valves providing protection
in case of fire or malfunction of compressors.
7.5 Water heat exchanger
The evaporators are of stainless steel plate type.
Their thermal insulation is ensured by a thick flexible
closed-cell heat-insulating jacket. Furthermore, the
frost protection is ensured by electric heaters.
These exchangers can work at pressures up to 10
bar on the hydraulic side and 45 bar on the refrige-
rant side.
Total heat recovery is carried out by a heat exchanger mounted on the compres-
sor’s discharge line in parallel with the condensing circuit.
Heat recovery function is activated by mean of a 4-ways valve.
7.2 General specifications
The VLS/VLH units are supplied complete and provi-
ded with all connecting pipes for the refrigerant and
internal wiring.
The refrigeration circuit of each unit undergoes a
pressure test, is drained, vacuumised, dehydrated
and filled with refrigerant, and includes the neces-
sary oil. Once assembled, each unit is subjected to a
complete final testing and the correct operation of all
refrigeration circuits is checked.
The base and the frame of each unit are made of ve-
ry thick galvanised sheet, and are secured by screw
and stainless bolts. All panels are secured by screw
and tropicalised steel bolts, they can be disassem-
bled for easy access to internal components.
All galvanised steel parts are painted with white
polyester resin (RAL 9001), to ensure the resistance
of the unit to corrosion and weather agents over time.
7.3 Compressors
These units are provided with hermetic scroll com-
pressors, with built-in motor protection.
Compressors are mounted on shock absorbers to
reduce vibrations. Motors are of direct start-up type,
cooled by the sucked refrigerant gas.
Thermistors protect the windings from any overtem-
peratures and the electronic control checks that the
delivery temperature is within the permissible range.
The capacity control, as well as the control of the de-
livered cooling capacity, are always ensured by the
electronic control.
7.4 Refrigeration circuits
Each unit has two complete refrigeration circuits, in-
cluding: a service valve to fill the unit with refrige-
rant, shut-off valves, thermostatic expansion valve,
dehydrating filter, sight glass with humidity indicator,
a differential pressure switch for the water.
The outdoor VLC units, deriving from the VLS versions,
are marked by the absence of the evaporator, and
are equipped with shutoff cocks on the suction line
and on the liquid line, so as to allow the connection
of remote evaporators.
Furthermore, each circuit is equipped with safety de-
vices in accordance with PED 2014/68/EU: HP and LP
pressure switches, safety valves providing protection
in case of fire or malfunction of compressors.
7.5 Water heat exchanger
The evaporators are of stainless steel plate type.
Their thermal insulation is ensured by a thick flexible
closed-cell heat-insulating jacket. Furthermore, the
frost protection is ensured by electric heaters.
These exchangers can work at pressures up to 10
bar on the hydraulic side and 45 bar on the refrige-
rant side.
Total heat recovery is carried out by a heat exchanger mounted on the compres-
sor’s discharge line in parallel with the condensing circuit.
Heat recovery function is activated by mean of a 4-ways valve.
Page 28
Options
Description
General Description
7 GENERAL DESCRIPTION
7.1 Introduction
The VLS/VLH units are water chillers /air-water heat
pumps provided with hermetic scroll compressors
with two refrigeration circuits.
These units are fit for cooling and heating intermedia-
te fluids (glycoled water), for air-conditioning appli-
cations in industrial processes.
These units can be installed outdoor on the roof of a
building or at ground level.
This series includes the following versions:
Version (STD/HSE
1
)
Description
VLS/VLH Base Low Noise version (BLN
2
)
VLS/VLH Low Noise version (LN)
VLS/VLH Extra Low Noise version (ELN)
VLS/VLH High Temperature version (HET)
Air condensing chillers/heat pumps, using
R410A refrigerant.
1
High efficiency Units (HSE) with inverter fans
2
A High Pressure Fan (HPF) version is available
For each VLS version, the corresponding condensing unit version (VLC) is available
Available options:
VLS/D
VLH/D
VLR
The heat recovery is carried out by a desuperheater mounted on the compressor’s
discharge line.
ITELCO INDUS MAN VLS_C NEW Volta 14 03/09/10 12:16:25 Black
AIRWELL IT_VLS MINOLTA Volta 14 12/17/10 16:48:10 Black
