Air conditioning Systems

Transcription

Operation manual
and
installation instructions
ENGLISH
Air conditioning systems
AIRCO03
AIRCO05
AIRCO10
AIRCO15
C o p y r i g h t © 2 0 0 2 , 2 0 0 3 Ve t u s d e n O u d e n n . v. S c h i e d a m H o l l a n d
Handboeken / Manuals / Handbücher / Manuels / Manuales / Manuali
13.0101
13.0102
13.0103
13.0104
Art.code
Omschrijving
I.AIRCONL
Bedieningshandleiding en installatieinstructies ‘Luchtbehandelingssystemen’
Art.code
Description
I.AIRCOE
Operation manual and installation instructions ‘Air conditioning systems’
Art.-Kode
Beschreibung
I.AIRCOD
Bedienungshandbuch und Einbauanleitung ‘Klimaanlagen’
Code d’art.
Description
I.AIRCOF
Manuel d’utilisation et instructions d’installation ‘Systèmes de traitement de l’air’
(Nederlands)
(English)
(Deutsch)
(Français)
Código de art. Descripción
13.0105
13.0106
I.AIRCOS
Manual de manejo y instrucciones de instalación ‘Sistemas para tratamiento de aire’ (Español)
Art.codice
Descrizione
I.AIRCOI
Manuale per l’uso e istruzioni per l’installazione ‘Sistemi di condizionamento’
(Italiano)
Dit produkt voldoet aan de vereisten van EG-richtlijnen:
This product conforms to the EEC Guideline requirements:
• EN 50081-2 (1993) (EMC, Emission)
Dieses Produkt erfüllt die Anforderungen der folgenden EU-Richtlinien:
• EN 61000-6-2 (1999) (EMC, Immunity)
Ce produit répond aux normes de la directive CE :
• EN 61000-3-2 (1995) (Harmonics)
Este producto cumple las normas de la directiva CE:
• EN 61000-3-3 (1995) (Flicker)
Questo prodotto è conforme alle direttive comunitarie:
2
13.0102
Airconditioning systems AIRCO03, AIRCO05, AIRCO10 and AIRCO15
Contents
1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3
Operating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4
Installation
4.0
Description of the system . . . . . . . . . . . . . . . . . 6
4.1
4.1.1
4.1.2
4.1.3
4.1.4
4.1.5
4.1.6
System cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Scope of supply . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Cooling water circuit . . . . . . . . . . . . . . . . . . . . . . . 8
Connections for liquid pipes . . . . . . . . . . . . . . . 10
Condensation water drain . . . . . . . . . . . . . . . . . 15
Electrical connections . . . . . . . . . . . . . . . . . . . . 11
4.2
4.2.1
4.2.2
4.2.3
4.2.4
4.2.5
4.2.6
4.2.7
Fan-coil units . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scope of supply . . . . . . . . . . . . . . . . . . . . . . . . .
Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air intake grating . . . . . . . . . . . . . . . . . . . . . . . .
Air outlet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air outlet grating, air hose . . . . . . . . . . . . . . . . .
Condensation water drain . . . . . . . . . . . . . . . . .
Electrical connections . . . . . . . . . . . . . . . . . . . .
4.3
Liquid filled closed circuit . . . . . . . . . . . . . . . . 17
4.4
4.4.1
4.4.2
4.4.3
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Scope of supply . . . . . . . . . . . . . . . . . . . . . . . . . 19
Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
4.5
Taking into service . . . . . . . . . . . . . . . . . . . . . . 22
5
Maintenance
5.1
5.2
5.3
5.4
5.5
Cleaning raw water filter . . . . . . . . . . . . . . . . . . . 24
Air intake filter, fan-coil unit . . . . . . . . . . . . . . . . 24
Cleaning condensation water drain,
fan-coil units . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Cleaning raw water system . . . . . . . . . . . . . . . . 24
Laying up for winter . . . . . . . . . . . . . . . . . . . . . . 24
6
Fault finding . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7
Technical data . . . . . . . . . . . . . . . . . . . . . . . . 26
7.1
7.2
Cooling liquid specification . . . . . . . . . . . . . . . . 27
Quantity of cooling liquid required . . . . . . . . . . . 27
8
Overall dimensions . . . . . . . . . . . . . . . . . . . . 28
9
Wiring diagrams . . . . . . . . . . . . . . . . . . . . . . 30
Tables
1
2
3
Voltage, power consumption and fuses . . . . . . . . . 11
Capacity of water cooled condenser . . . . . . . . . . . . 24
Average values for the quantity of cooling liquid
required for a complete installation . . . . . . . . . . . . . 26
Diagrams
1
2
3
4
5
6
7
Raw water system . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Connections to system cabinet,
AIRCO03 and AIRCO05 . . . . . . . . . . . . . . . . . . . . . . 12
Connections to system cabinet,
AIRCO10 and AIRCO15 . . . . . . . . . . . . . . . . . . . . . . 13
Connections to fan-coil units . . . . . . . . . . . . . . . . . . 16
Installation example closed cooling liquid circuit . . .18
Thermostat connections . . . . . . . . . . . . . . . . . . . . . 19
Connecting thermostats together and to the
control pcb in the system cabinet . . . . . . . . . . . . . . 21
14
14
14
14
15
15
15
16
13.0102
3
1 Introduction
The operation, installation, taking into service and maintenance
of the air conditioning installation is described in this manual,
together with a description and explanation of the working of
the unit.
No special tools are required for the installation and neither is
there a need for specific cooling technique knowledge. The
complete cooling installation is already installed and taken into
service.
2 Safety precautions
You will find this symbol by any notes concerning
safety. Follow the instructions carefully.
Pass on the safety precautions to other persons who may maintain the air conditioning installation.
General rules and regulations concerning safety and the prevention of accidents must also be adhered to.
Please read this manual carefully and take note of the usage,
installation and maintenance pointers given.
This will allow you to avoid breakdowns and accidents and
retain your guarantee rights while keeping your air conditioning
unit in a perfect state of maintenance.
• Never touch moving parts of the installation while it is in operation.
The air conditioning unit is exclusively intended for application
as specified in the Vetus documentation. Any other usage is in
breach of this purpose and the manufacturer then accepts no
liability for any damage arising. All risks are then exclusively for
the user.
• Disconnect the air conditioning unit before checking parts of
it or making adjustments.
Correct usage also entails adhering to the instructions for operation, maintenance and repair as specified by the manufacturer.
The cooling installation in the system cabinet may only be maintained and repaired by persons who are legally authorised to do
so.
• The positive connection must be disconnected from the battery and attached to earth before carrying out any welding
work.
• Never touch hot parts in the system cabinet and never place
inflammable materials in the vicinity of the system cabinet.
• Carry out maintenance work safely by only using appropriate
tools.
The regulations designed to prevent accidents and other generally accepted safety and operational regulations must be
adhered to.
Unauthorised changes to the air conditioning installation
excludes the manufacturer from responsibility for any ensuing
damage.
We are available for any queries you may have.
Vetus den Ouden n.v.
4
13.0102
3 Operating
1
2
3
4
5
AIRCO
Switching on
22
24
20
If the cooling function is required:
• Switch on the power using the main switch.
• Switch on the battery main switch.
The LEDs 'Stand by' on all thermostats and on the system
cabinet will now light up.
• Open the sea cock.
26
18
o
C
vetus®
VAC0001
1
2
3
4
5
If the heating function is required:
• Switch on the battery main switch.
The LEDs 'Stand by' on all thermostats and on the system
cabinet will now light up.
• Open the fuel supply shut-off valve.
Fan speed control button
Temperature setting button
On/off switch ‘cooling’
LED ‘cooling'
LED ‘stand by'
Press the on/off switch briefly on one of the thermostats in order
to switch on the cooling system and the fan(s) of the fan-coil
unit(s) in the room in which the thermostat is situated. The LED
‘cooling’ will now also light up.
The fans of the fan-coil units will not be switched on in any other
rooms. Only the LED ‘Stand by’ will remain alight.
Control panel system cabinet
VAC0066
Use the on/off switch on the thermostat in all other rooms in
order to switch on the fan there also.
AIRCO
CIRCULATION PUMP
Regulating
Use button (2) to set the desired temperature.
The fan is switched off when a room has reached the desired
temperature.
Button (1) can be used to set (lower) the speed of the fan for
more comfort. It takes longer for the room to reach a particular
temperature when the fan speed is lower.
ALARM
STAND
BY
COOL
vetus®
Switching off
Switch off the fan/thermostat function by using the on/off switch
again. The cooling system is only switched off after all thermostats have been switched off.
A control panel is situated on the system cabinet.
This panel shows whether the system is on ‘Stand by’ or
whether the cooling or heating function has been chosen on
one or more thermostats.
This switch allows a choice to be made between normal operation or operation only of the circulation pump and the raw water
pump.
- Switch to the right: Normal operation.
- Switch to the left: Only the circulation pump and the raw
water pump are in operation.
13.0102
5
4 Installation
4.0 Description of the system
There is a cooling system in the system cabinet which can cool
a liquid to a temperature between 3 and 8°C. The cooled liquid
circulates through the ship in a system of pipes. A thermostat in
the system cabinet regulates the cooling system.
The heat which is removed from the circulating liquid is transferred to the raw water.
One or more so-called fan-coil units are situated in each room.
A fan-coil unit can be regarded as a radiator with a fan; the fan
causes a flow of air past the radiator.
The circulating liquid flows through the radiator in the fan-coil
unit. When the fan is turning the flow of air past the radiator will
be cooled.
The air conditioning system can only function if there is a mains
power supply. The power supply (230 V alternating current)
must be supplied by a generator set or from a mains power
supply from the shore.
One thermostat is fitted in each room. Even if there are more
than one fan-coil units in the room there is still only one thermostat.
The thermostat is used to set the desired temperature for that
room. The temperature in the room is controlled by allowing the
fan(s) to work or not.
A connection to the (battery) ship’s circuit (12 or 24 V) is necessary for the control of the system.
4
Room 1
Room 2
Room 3
VAC0033
AIRCO
22
24
20
26
18
o
C
vetus®
AIRCO
3
22
24
20
26
18
o
C
2
2
vetus®
3
3
AIRCO
22
24
20
26
18
o
C
2
2
7
vetus®
7
7
Pipes for closed cooling liquid circuit
1
8
7
AIRCO 3kW
WL
6
6
13.0102
5
Pipes for raw water circuit
Condensation water drain
Electrical connections, number of cores
1
2
3
4
5
6
7
8
Airco system cabinet
Fan-coil unit
Thermostat
Expansion tank
Raw water filter
Raw water pump
Mains power 230 V AC
Ship’s battery circuit 12 V or 24 V
4.1 System cabinet
4.1.1 Scope of supply
AIRCO03, AIRCO05, AIRCO10, AIRCO15
1 System cabinet with vibration dampers.
2 Installation set for raw water intake consisting of:
Through-hull fitting, sea cock, water filter, pump with fitting
brackets and necessary fittings.
3 Installation set for overflow tank consisting of:
Overflow tank with filler stopper and necessary fittings.
13.0102
7
4.1.2 Positioning
Choose an easily accessible position for the system cabinet,
free from bilge water.
Make sure there is sufficient space around the system cabinet.
When selecting a position make allowance for the cooling water
intake.
min. 100 mm
min. 300 mm
Prepare a solid base or console on a wall. Consider the stability when at sea bearing in mind the weight of the apparatus.
Consult section 8 ‘Overall dimensions’ when determining the
size of the base.
The system cabinet must be positioned with the bottom parallel
to the waterline.
min. 600 mm
Position the system cabinet on the vibration dampers delivered
in order to prevent irritating vibration noise.
5 kW
vetus®
AIRCO
VAC0003
4.1.3 Cooling water circuit
The cooling system condenser is water cooled. The necessary
raw water must be supplied by a separate pump. In order to
protect the water pump from dirt the water must be drawn in
through a through-hull fitting fitted with a water scoop and the
cooling water filter which is supplied. A sea cock must be fitted
onto the water intake (through-hull fitting with water scoop).
After passing through the condenser the water is discharged
outside through another through-hull fitting.
Diagram 1, Raw water system
AIRCO10 /
AIRCO15
AIRCO03 /
AIRCO05
5
5
WL
1
WL
1
3
3
4
1
2
3
4
5
8
Raw water pump
2
Through hull fitting with water scoop
Cooling water filter
Sea cock
Through hull fitting
13.0102
4
VAC0042
2
Through hull fitting, water intake
Water filter
WL
3/4" - 20 mm
VAC0085
3/4"
3/4"
VAC0086
VAC0008
VAC0088
VAC0087
Fit the water filter directly onto the sea cock.
The water filter must be underneath the waterline; the water
pump is not self-priming!
Water pump
The water intake (through hull fitting with water scoop) must be
positioned where a continuous supply of water is guaranteed
under all circumstances. Near the bow, where turbulence can
be created at higher speeds, is a less suitable place. The intake
must also remain under water if the ship rolls. If air is drawn in
instead of water not only is there insufficient cooling but the
water pump can also be damaged by running dry.
1/2" - 20 mm
1/2" - 1/2"
3/4" - 3/4"
3/4" - 20 mm
WL
VAC0007
VAC0009
Position the through hull fitting in such a way that the sea cock
fitted can be reached easily in order to open or shut it.
The water pump is not self-priming and must be fitted underneath the waterline. The capacity of the water pump depends
on the lift height and decreases as this increases. The maximum
lifting height is 3 m.
Fit the through hull fitting with the grooves pointing forwards.
Use a sealer when fitting the through-hull fitting.
Fit the pump using the brackets supplied and with the OUT connection as shown in the drawing.
Fit the hose columns using a liquid sealer (e.g. Loctite® 577 or
Threebond® 1110B) or using teflon tape.
13.0102
9
Through hull fitting, water discharge
4.1.4 Connections for liquid pipes
3/4" - 20 mm
WL
3/4"
AIRCO03 /
AIRCO05
VAC0054
VAC0010
Position the through hull fitting for the cooling water discharge
on the waterline, since it is then not necessary to fit a sea cock
to this through hull fitting.
AIRCO10 /
AIRCO15
Hose connections
• Use flexible hoses, diameter 20 mm, for the connections
between the water intake and discharge and the system cabinet.
• Keep the hoses as short as possible and with as few bends
as possible.
See section 4.3, Closed liquid circuit, for notes and details with
reference to the liquid pipes. Connect the liquid pipes to the
hose columns as shown in diagram 5.
4.1.5 Condensation water drain
• Make sure that the hoses do not put any pressure on the
raw water pump housing.
• Only use water and soap, thus no fatty or oily products, to
make fitting the hoses to the hose connections easier.
• Use 2 corrosion resistant steel hose clamps for each hose.
After launching
Check all connections for leakage immediately after launching.
It is not necessary to bleed the system. As soon as the pump
turns it will draw in water and fill the system.
VAC0107
While the cooling installation is in operation condensation will
form in the system cabinet and this condensation water must be
discharged outside.
Use hose with diameter of at least 10 mm for the condensation
drain. The connection for the condensation drain is fitted with
G 1/4” int. Use a hose pillar suitable for the hose diameter used.
Always fit the hose downwards and without sharp bends.
10
13.0102
Connecting
4.1.6 Electrical connections to system cabinet
The installation must be connected to both a generator set or
power supply from the shore and to the batteries.
The generator set or the power supply from the shore supplies
the necessary energy for the cooling installation.
A
See table 1 for the power required.
The voltage shown on the type label of the system cabinet (230
V) must be the same as that of the power supply.
The battery supplies the necessary energy for the control of the
installation. The system is suitable for both 12 Volt or 24 Volt.
See table 1 , Voltage and power consumption, for the power
consumption.
VAC0011
Remove the cap, pull out plug ‘A’ (strip cable) in order to be
able to take the cap off completely, and connect the system
cabinet.
Do not forget to put plug ‘A’ back again when replacing the cap.
Connect the system cabinet as shown in the diagram.
Table 1, Voltage, power consumption and fuses
Type
AIRCO03
AIRCO05
Generator set:
AIRCO10
AIRCO15
Power, minimal: *)
1 x 230 V AC / 50 Hz
3 kVA
4,5 kVA
5 kVA
6 kVA
3 x 230/400 V AC / 50 Hz
8 kVA
13 kVA
13 kVA
13 kVA
1000 VA
1700 VA
3400 VA
5100 VA
16 A
16 A
16 A (3x)
16 A (3x)
Consumption
Fuse, slow blow
Battery voltage:
12 V
Consumption
3W
Fuse, slow blow
of
1A
24 V
12 V
6W
3W
of
1A
24 V
12 V
6W
3W
of
1A
24 V
12 V
6W
3W
of
24 V
6W
1A
*) For generators which can deliver a switching current for an
electric motor of 2 x the nominal generator current.
13.0102
11
Diagram 2, Connections to system cabinet, AIRCO03 and AIRCO05
Connection to 1-phase generator set: 1 x 230 V AC / 50 Hz
12 - 24 V DC
L
N
PE
+
–
20 A @ 12 V
15A @ 24 V
8
6
9
7
1,5 mm2
1,5 mm2
2
16 A
2,5 mm2
2,5 mm2
1 x 230 V AC
1
NL L N
AIRCO03
AIRCO05
4
VAC0052
AIRCO
22
24
20
AIRCO
22
26
18
o
vetus®
C
24
20
AIRCO
22
26
18
24
20
o
o
3
vetus®
C
5
vetus®
C
26
18
Connection to 3-phase generator set: 3 x 230/400 V AC / 50 Hz
12 - 24 V DC
+
–
1
2
3
4
5
6
7
8
9
Connection block, system cabinet
Control pcb, system cabinet
Thermostats
Connection cable for thermostats,
see 4.4.3
Raw water pump
Fuse, slow blow
Main switch
Fuse, slow blow
Control circuit switch
8
6
9
7
1,5 mm2
1,5 mm2
20 A @ 12 V
15A @ 24 V
16 A
2,5 mm2
2,5 mm2
3 x 230 / 400 V AC + 0
L1
L2
L3
N
PE
2
NL L N
AIRCO03
AIRCO05
1
4
VAC0053
AIRCO
22
24
20
AIRCO
22
24
20
26
18
o
C
vetus®
AIRCO
22
26
18
24
20
o
C
12
13.0102
o
C
26
18
vetus®
vetus®
3
5
Diagram 3, Connections to system cabinet, AIRCO10 and AIRCO15
L
N
PE
6 mm2
1 x 230 V AC
+
–
12 - 24 V DC
8
6 mm2
Connection to 1-phase generator set: 1 x 230 V AC / 50 Hz
1A
16 A
9
1,5 mm2
1,5 mm2
VAC0050
6
2,5 mm2
2,5 mm2
2,5 mm2
2,5 mm2
2,5 mm2
2,5 mm2
7
2
1
NLNLNL
1 1 2 2 3 3
NL LN
AIRCO10
AIRCO15
4
AIRCO
22
24
20
AIRCO
22
26
18
o
24
20
vetus®
C
AIRCO
22
26
18
24
20
o
vetus®
C
3
26
18
o
vetus®
C
10
5
Connection to 3-phase generator set: 3 x 230/400 V AC / 50 Hz
+
–
8
1,5 mm2
1,5 mm2
1 Connection block, system
cabinet
2 Control pcb, system cabinet
3 Thermostats
4 Connection cable for thermostats, see 4.4.3
5 Raw water pump
6 Fuse, slow blow
7 Main switch
8 Fuse, slow blow
9 Control cicuit switch
10 Extra circulation pump
2,5 mm2
9
VAC0051
16 A
6
7
1A
2,5 mm2
12 - 24 V DC
2,5 mm2
2,5 mm2
3 x 230 / 400 V AC + 0
L1
L2
L3
N
PE
2
1
NL LN
4
NLNLNL
1 1 2 2 3 3
AIRCO10
AIRCO15
AIRCO
22
24
20
AIRCO
22
26
18
24
20
o
C
vetus®
AIRCO
22
26
18
24
20
o
C
26
18
o
C
vetus®
vetus®
3
10
5
13.0102
13
4.2 Fan-coil units
4.2.2 Positioning
The fan-coil units must be positioned in or nearby the rooms
which are to be cooled.
The fan-coil units should preferably be positioned a small distance above the deck, directly behind a partition in which there
is an air intake grating. If this is not possible then make a duct
from an air intake grating positioned low down to the air intake
side of the fan-coil unit.
The fan-coil units must be positioned with the bottom, the driptray, parallel to the waterline.
2
Fit the fan-coil unit against a partition.
1
VAC0089
1 Fan-coil unit with assembly supports, cable pull relief and
necessary fittings.
2 T-pieces 25 - 16 - 25 mm
VAC0043
4.2.3 Air intake grating
6
The air intake grating must have a net opening of at least 300
cm2.
5
An air filter, size 20 x 20 cm, is fitted on the intake side of the fancoil unit.
Make sure that this air filter is readily accessible since this
makes regular checking of the filter easy. (A dirty filter must be
replaced.)
Therefore it is preferable to use a grating with build-in dimensions of at least 20 x 20 cm.
4
1
2
VAC0021
1
2
3
4
14
Air intake grating
Air filter
Fan-coil unit
Air outlet opening
13.0102
3
5 Insulated air hose
6 Air outlet grating
However, it is preferable to choose an air outlet grating with a
larger net opening. This reduces the speed of the air being discharged and consequently reduces the noise level.
4.2.4 Air outlet
The air outlet grating must be placed as high as possible and
not directly next to an air intake grating.
The air hose must be insulated in order to prevent condensation.
VAC0018
C
It is also possible to split the outlet hose into two, each with their
own outlet grating.
C
A
A
A
C
4.2.6 Condensation water drain
C
B
A
The air outlet opening of the fan-coil unit can be positioned in 3
different ways.
The position of the opening can be altered in the following way:
- Loosen the 4 screws (A) and remove the drip-tray (B).
- Loosen the 4 screws (C), position the fan housing as
required and refit the parts in the reverse order.
VAC0022
4.2.5 Air outlet grating, air hose
While the cooling installation is in operation condensation will
form in the fan-coil unit and this condensation water must be
discharged outside.
The fan-coil unit is provided with 2 G 1/4” internal connections.
Fit both hose pillars (G1/4” x 13 mm) or 1 hose pillar and 1 blind
plug.
VAC0044
Connect the air outlet opening to an air outlet grating using an
insulated air hose with diameter 75 mm.
• If the fan-coil unit is positioned at least 40 cm above the
waterline, a pipe can be led directly to a through-hull fitting,
situated on or above the waterline.
• If the fan-coil unit is positioned under or less than 40 cm
above the waterline, the condensation water must be led to
a lower placed collecting tank. This tank or tray can be automatically emptied by means of a bilge pump connected to a
level switch.
Use hose of diameter 13 mm for the condensation drain.
Always fit the hose downwards and without sharp bends.
The air outlet grating must have a net opening which is at least
as big as the cross-section of the air hose: 44 cm2.
13.0102
15
4.2.7 Electrical connections
Check that the voltage, recorded on the type label on the fancoil unit, agrees with the voltage on board (230 V).
Power consumption of the fan is 135 VA at maximum speed.
Speed control
The fan-coil unit is supplied without (fan) speed control. One
speed control, including fitting material, is supplied with each
thermostat, see 4.4.1.
One thermostat is positioned in each room. Fit the speed control into the fan-coil unit (or into one of the units if more than one
fan-coil unit is used).
Loosen the connections block and cut the wires loose. Fit the
speed control using the fitting materials supplied.
Connect the fan-coil unit as shown in diagram 7.
VAC0020
The cable from the thermostat to the speed control must have a
ferrite core, see also 4.4.3 .
Diagram 4, Connections to fan-coil units
1
AIRCO
22
24
20
1
AIRCO
22
26
18
24
20
o
vetus®
C
230 V AC
26
18
o
C
vetus®
L
N
PE
3
6A
5
0 - 10 V
2
L
N
L
N
L
N
0
V+
6
VAC0019
4
⇒A
2
5
1
AIRCO
22
24
20
26
18
o
vetus®
C
4
⇒A
3
3
2
1
AIRCO
22
24
20
1 Thermostat
2 Speed control
3 Fan-coil unit
A maximum of 4 fan-coil units can be connected to 1 speed control.
26
18
o
C
4 Fan
5 Capacitor 2 µF
6 Ferrite core
vetus®
3
3
3
3
2
16
13.0102
4.3 Liquid filled closed circuit
Together with the system cabinet the fan-coil units form a closed
liquid circuit.
Expansion tank
The expansion tank is included in the materials supplied
with the system cabinet.
An expansion tank must be
placed in the return pipe of
the closed liquid circuit. The
expansion tank also functions
as filler tank.
The expansion tank must be
positioned at the highest
point of the complete installation.
When fitting the hoses take account of the following points:
• Keep the connecting pipes as short as possible in order to
limit the resistance in the hoses.
• Fit the hoses in such a way that the risk of external damage
or attack by chemicals or high temperatures is as low as possible.
• Protect hoses that have to pass through partitions with leadthroughs or special couplings.
• Bends must not have kinks, a kink restricts the free flow of
the liquid.
Minimum bend radius: - Hose 16 mm diameter: 130 mm
- Hose 25 mm diameter: 200 mm
• Always fix the pipes with brackets; distance between brackets ca. 50 cm.
VAC0090
Fit the expansion tank against a wall and fit the hose columns.
Cooling liquid pipes
The connections between the system cabinet, the fan-coil units
and the expansion tank must be made with hoses. Use insulated hose for this in order to prevent condensation.
The hose must be suitable for cooling liquids and for temperatures from -25°C to +80°C and a pressure of 2 bar.
Vetus supplies suitable hoses and insulation materials for this.
Hose ø 16 mm, art.code: CCHOSE16.
Hose ø 25 mm, art.code: CCHOSE25.
Insulation tubing for hose CCHOSE16, art.code: CCOVER16.
Insulation tubing for hose CCHOSE25, art.code: CCOVER25.
• Shortening hoses must be done by cutting. Never shorten
these by sawing (sawdust can enter the system and cause
problems) or by pinching (the hose can be too deformed).
• Use good quality hose clamps at every hose connection.
Hoses with internal diameter of 25 mm must be used for the
main supply and return network through the ship.
Hoses with internal diameter of 16 mm must be used for the
main supply to the fan-coil units.
The hose connections on the system cabinet, the expansion
tank and the fan-coil units are the correct sizes for this.
- System cabinet: ø 25 mm
- Expansion tank: ø 25 mm
- Fan-coil units: ø 16 mm
VAC0106
• In order to prevent the formation of condensation between
the hose and the insulation tubing, the ends of the insulation
tubing on the hose should be sealed off with tape.
T-pieces
2 T-pieces 25-16-25 mm are supplied with every fan-coil unit in
order to simplify the fitting.
The last T-pieces are used as reducing pieces, from 25 to
16 mm. Fit the caps supplied on any 25 mm connections on the
T-pieces which are not being used.
13.0102
17
Diagram 5, Installation example liquid filled closed circuit
6
VAC0027
2
2
2
2
5
7
3
4
1
AIRCO03/ AIRCO05
18
13.0102
3
1
AIRCO10 / AIRCO15
1
2
3
4
5
6
7
AIRCO system cabinet
Fan-coil unit
Hose 25 mm diam. int.
T-piece 25 - 16 - 25 mm
Hose 16 mm diam. int.
Overflow tank
Cap 25 mm
4.4 Thermostat
4.4.2 Positioning
A thermostat must be placed in every separate room. Even if
more than one fan-coil unit are used in one (1) room only one
(1) thermostat is fitted!
AIR
CO
22
24
When choosing a position for a thermostat take account of the
following points:
• Choose a position where the thermostat is readily accessible
for setting it.
• Fit the thermostat in a position where it is free from draughts.
• The thermostat housing is not completely closed off at the
front and back. A flow of air through the thermostat housing
will influence the operation of the thermostat.
1
20
26
18
4
VAC0091
2
3
4.4.3 Connections
Each thermostat is connected to the speed control pcb fitted in
one of the fan-coil units in the same room as the thermostat
concerned.
Connect a 2 x 0.75 mm2 cable from the thermostat to the speed
control pcb as shown in the diagram.
Fit the ferrite core as close as possible to the speed control as
shown in the diagram.
1 Thermostat.
2 Speed control printed circuit board with fixing materials.
3 Connecting materials .
All thermostats are connected to each other and the last thermostat is connected to the control pcb in the system cabinet.
In order to do this connect a 4-core cable (a so-called flat
telecommunications cable) fitted with a 6P4C Modular plug to
each thermostat.
4 Ferrite core.
Diagram 6, Thermostat connections
–
+
L
N
L
N
1
FAN 2 FAN 1
8
2
L
–
+
N
GND
Fan +
Fan –
GND
9V +
Cool
Heat
3
Fan +
Fan –
GND
9V +
Cool
Heat
1
2
3
4
1
2
3
4
VAC0005
4
6
7
5
1
2
3
4
5
6
7
8
Colour code:
1 Black
2 Red
3 Green
4 Yellow
Thermostat
Speed control pcb in fan-coil unit
Connection to speed control pcb
Plug (6P4C Modular)
Temperature control calibration
LED: ‘ON’ when fan is switched on
Ferrite core
13.0102
19
Connecting cables
1
2
3
4
VAC0025
Colour code:
1 Black
2 Red
3 Green
4 Yellow
The connections between the thermostats must also be made
using a 4-core cable (a so-called flat telecommunications
cable). The connecting cables must be fitted with 6P4C IDC
plugs on both ends.
Fit the plugs on the ends of all the cables in exactly the
same way.
Splitters
A
A
ABCD
ABCD
VAC0026
4 3 21 4 3 21
12 3 4
A
ABCD
Use splitters as shown in order to make the connections
between the thermostats.
N.B.: The order of the connections on the different sides of the
splitters is the mirror image of each other!
In order to avoid wiring faults we advise:
• Use the splitters for connecting the thermostats as shown in
the diagrams.
• Always fit the plugs to the 4-core cable (A) in the same way.
20
13.0102
Diagram 7, Connecting thermostats together and to the control pcb in the system cabinet
–
+
FAN 2 FAN 1
Fan +
Fan –
GND
9V +
Cool
Heat
1
L
N
L
N
5
2
L
N
GND
1
2
3
4
5
3
1
L
N
L
N
5
–
+
L
N
L
N
5
L
N
GND
2
FAN 2 FAN 1
–
+
FAN 2 FAN 1
Fan +
Fan –
GND
9V +
Cool
Heat
Fan +
Fan –
GND
9V +
Cool
Heat
1
Thermostat
Speed control pcb in fan-coil unit
Splitter
Ferrite core
L
N
GND
2
3
4
L
N
5
–
+
L
N
L
N
5
L
N
GND
–
+
L
5
L
N
2
L
N
N
GND
2
FAN 2 FAN 1
L
N
FAN 2 FAN 1
–
+
1
Fan +
Fan –
GND
9V +
Cool
Heat
1
Fan +
Fan –
GND
9V +
Cool
Heat
Fan +
Fan –
GND
9V +
Cool
Heat
1
FAN 2 FAN 1
4
L
N
GND
2
3
4
1
Fan +
Fan –
GND
9V +
Cool
Heat
1
Fan +
Fan –
GND
9V +
Cool
Heat
1
Fan +
Fan –
GND
9V +
Cool
Heat
Fan +
Fan –
GND
9V +
Cool
Heat
1
4
5
–
+
L
N
L
N
5
L
N
GND
2
–
+
L
N
L
N
5
L
N
GND
–
+
L
N
L
N
5
L
N
GND
FAN 2 FAN 1
L
N
FAN 2 FAN 1
L
N
FAN 2 FAN 1
–
+
FAN 2 FAN 1
VAC0024
2
L
N
GND
2
2
3
4
4
4
1
Fan +
Fan –
GND
9V +
Cool
Heat
1
Fan +
Fan –
GND
9V +
Cool
Heat
Fan +
Fan –
GND
9V +
Cool
Heat
1
4
L
N
5
L
N
GND
–
+
L
N
L
N
5
2
L
N
2
GND
–
+
L
N
L
N
5
FAN 2 FAN 1
L
N
FAN 2 FAN 1
–
+
FAN 2 FAN 1
VAC0103
2
L
N
GND
3
4
4
13.0102
21
Bleeding
4.5 Taking into service
Filling
Before the system can be taken into service it first has to be
filled with cooling liquid.
The installation is filled at the highest point, the expansion tank.
The installation must be filled with a cooling liquid or with a
water/anti-freeze mixture. See 7.1 Cooling liquid specification.
VAC0092
Never fill the system just with water.
The quantity of liquid required depends on the size of the installation, the number of fan-coil units and the total length of the
piping.
See 7.2 for the quantity of cooling liquid required.
Turn the screw in the bleeder nipple a half or a full turn anticlockwise.
Close the bleeder nipple as soon as cooling liquid begins to
escape.
1 Fill the expansion tank with cooling
liquid. Begin to remove the air from
the fan-coil units when no more liquid
flows out of the expansion tank.
Keep filling the expansion tank while removing air if the liquid
level has dropped.
VAC0093
After all the fan-coil units have had the air removed fill the
expansion tank to about halfway.
There is a switch on the operating panel of the system cabinet
which allows a choice to be made between normal operation
and only operation of the circulation pump and the raw water
pump.
While removing the air keep the liquid
level just under the topmost hose
connection. When the pump is
switched on you can then see
whether the liquid is circulating.
2 Turn the ‘circulation pump’ switch to the left, the LED next to
VAC0059
the switch will now light up.
Only the circulation pump and the raw water pump can now
operate; the cooling compressor will not be switched on.
Check the entire system for leaks.
AIRCO
CIRCULATION PUMP
ALARM
AIRCO
CIRCULATION PUMP
STAND
BY
COOL
vetus®
ALARM
VAC0045
STAND
BY
3 Start the system.
Switch on the power. Operate the on/off switch on one of the
thermostats; the LED ‘cooling’ on the thermostat will now
light up.
The circulation pump and the raw water pump will now function
22
13.0102
but the cooling compressor will not be switched on.
4 Now put the ‘circulation pump’ switch to the normal position
(to the right).
• Check that the raw water pump is operating and that the
raw water circuit has no leaks.
• Check in the expansion tank that
the cooling liquid is circulating and
check the cooling liquid circuit for
leaks.
AIRCO
CIRCULATION PUMP
ALARM
AIRCO
CIRCULATION PUMP
STAND
BY
COOL
vetus®
ALARM
VAC0061
Leave the system running in this way for
some time after the check has shown that both circuits are functioning correctly.
If the check shows that there is no circulation in one of the
circuits then handle as follows:
VAC0049
STAND
BY
The cooling system is then switched on and the liquid will be
cooled.
Now check the working of the complete system.
Raw water circuit:
- Check that the sea cock is open.
- Check that the pump is underneath the waterline.
- Disconnect a hose from the pump to the system cabinet in
order to remove the air; the hose should now fill up with
water.
- Check that the pump is running.
Setting the installation
All the necessary settings for the various parts of the installation
have already been carried out.
The button
on the thermostat can be used by the user to
set the speed of the fan of the fan-coil unit.
Cooling liquid circuit:
- There may b e an air bubble in the pump; switch the pump
off and on.
- The pump rotor is jammed because it has not been used for
a long time:
- Switch off the power.
- Remove the cap on the system cabinet which covers the
electrical connections.
- Remove the rubber blanking cap.
- Remove the front plate from the system cabinet.
- Remove the circulation pump cover plug.
- Put a screwdriver in the pump and turn the rotor.
Any air left in the system will leave it via the expansion tank. This
will cause the level in the expansion tank to drop, so that the
tank must be regularly refilled.
When the level of liquid in the expansion tank no longer drops
the system is completely full.
The fan will rotate with a pre-set minimum speed when the thermostat button is set to the lowest position.
min. 95 V AC
VAC0068
This minimum value can be set on the speed control pcb fitted
in the fan-coil unit.
If this setting is altered allowance must be made for the fact that
the minimum voltage on the fan must be at least 95 V alternating current!
Now fill up the expansion tank to above
the topmost connection (ca. 2/3 of the
total height).
VAC0060
After a few weeks check the level in the expansion tank and
refill if necessary.
13.0102
23
5.4 Cleaning raw water system
5 Maintenance
The water cooled condenser in the system cabinet must be
descaled once a year. Fill the raw water system with cleaning
vinegar (8 %) in order to do this.
5.1 Cleaning raw water filter
Regularly check whether the cooling water filter is dirty.
Clean the cooling water filter as often as is necessary, depending on how dirty the sailing water is, but at least once per half
year. A dirty cooling water filter can cause a higher temperature
than normal or overheating of the cooling installation.
AIRCO
Shut the sea cock before removing the lid using the key provided.
A
VAC0070
VAC0069
Check that the lid is shut properly after cleaning and replacing
the lid.
5.2 Air intake filter, fan-coil unit
In order to fill the raw water system with cleaning vinegar handle as follows:
- Shut the sea cock.
- Remove both hoses (intake and outlet).
- Temporarily remove the zinc anode ‘A’ in order to be able to
drain the raw water system completely.
- Connect short pieces of hose on the intake and outlet connections. These hoses must point upwards.
- Now fill the system with cleaning vinegar. See table 2 for the
quantity required.
- Leave the vinegar in the system for at least 2 days before
draining it out again.
- Reconnect the intake and outlet hoses.
Table 2, Capacity of water cooled condenser
VAC0094
System
Capacity of water cooled condensor
AIRCO03
5 liter
AIRCO05
5 liter
AIRCO10
9,5 liter
AIRCO15
13,5 liter
5.5 Laying up for winter
When the ship is laid up for winter the raw water system must
be completely drained and filled with anti-freeze. Temporarily
Check the state of the air intake filter regularly. Replace a dirty
filter.
Filter, Vetus Art.code: LBHF
5.3 Cleaning condensation water drain, fancoil units
Contamination can settle out in the fan-coil unit drip-tray and the
condensation drains.
Rinse out the pipes and the drip-tray at least 1 x per year using
clean water.
24
13.0102
VAC0079
A
remove the zinc anode ‘A’ in order to be able to drain the raw
water system completely. If necessary, fit a new zinc anode.
6 Fault finding
Fault
Possible cause
Solution
The system does not start after the main
switch is switched on.
The generator set is not running or does
not supply any power.
Switch on / check generator set.
230 V fuse faulty.
Check/ replace.
No battery power.
Check battery main switch.
Check fuse.
Fault in thermostat wiring.
Check wiring.
Fault in thermostat.
Check / replace thermostat.
Pressing button on thermostat has no
effect.
The compressor, in the system cabinet, is No flow of cooling water because the sea
switched off again shortly after switching cock is shut or the raw water filter is
on.
blocked.
Open the sea cock / Clean the raw water
filter.
The system does not react after being
switched off and then switched on again
a short time later.
The time between switching off and on
was shorter than that required for protection of the system.
After the waiting time the system will start
operating again.
The air flow is insufficient when the thermostat button controlling the speed of
the fan is set to maximum speed.
The air intake or outlet grating is blocked. Clear the blockage.
The sound of running water is audible
near a fan-coil unit or the expansion tank.
The air filter is dirty.
Replace the air filter.
There is insufficient liquid in the closed
liquid circuit.
Check for leakages and add liquid to the
system.
13.0102
25
7 Technical details
System cabinet type
:
AIRCO03
AIRCO05
AIRCO10
AIRCO15
Capacity, cooling
:
3 kW
5 kW
10 kW
15 kW
Number of compressors
:
1
1
2
3
Coolant
:
R407c
R407c
R407c
R407
Power supply 1
:
1 x 230 V AC
1 x 230 V AC
1 x 230 V AC
1 x 230 V AC
or
or
3 x 230 / 400 V AC
3 x 230 / 400 V AC
Voltage range
:
+10 % - –15 %
+10 % - –15 %
+10 % - –15 %
+10 % - –15 %
Frequency
:
50 Hz
50 Hz
50 Hz
50 Hz
Nominal current
:
4.5 A
7.5 A
2 x 7.5 A
3 x 7.5 A
LRA (1 compressor)
:
21 / 23
33 / 36
33 / 36
33 / 36
Power supply 2
:
12 V / 24 Volt
12 V / 24 Volt
12 V / 24 Volt
12 V / 24 Volt
Voltage range
:
10 to 32 Volt
10 to 32 Volt
10 to 32 Volt
10 to 32 Volt
during operation
:
3/6 W @ 12/24 V
3/6 W @ 12/24 V
3/6 W @ 12/24 V
3/6 W @ 12/24 V
Yield circulation pump
:
3900 l/h at 0.1 bar
3900 l/h at 0.1 bar
3600 l/h at 0.14 bar
3600l/h at 0.14bar
2.5 bar
2.5 bar
2.0 bar
2.0 bar
Power consumption,
Maximum system pressure :
Capacity seawater pump
:
1600 l/h at 0.1 bar
1600 l/h at 0.1 bar
3700 l/h at 0.1 bar
3700 l/h at 01 bar
Max. ambient
:
-40 °C to +80°C
-40 °C to +80°C
-40 °C to+80°C
-40 °C to +80°C
:
46 kg
50 kg
88 kg
126 kg
Capacity at ∆T = 18 °C
:
2000 W
Maximum air flow
:
300 m3/h
Power supply
:
230 V AC
Power
:
135 VA
Weight
:
9 kg
temperature
Weight
Fan-coil unit
26
13.0102
7.1 Cooling liquid specification
7.2
The composition and control of the cooling liquid for an air conditioning installation is of particular importance because corrosion and freezing can cause damage to the system.
Use a ready-mixed cooling liquid (A) or a mixture of a suitable
cooling system protective liquid (antifreeze on ethylene glycol
basis) and tap water (B).
The quantities given below are required to fill the separate parts
of the installation.
A)Ready-mixed cooling liquid
Vetus HCFLUID25 is an example of a very suitable ready-mixed
cooling liquid.
B)Mixture of cooling system protective liquid and tap
water
The concentration of the anti-freeze in the cooling liquid may
not be more or less than that shown below:
Cooling system protection
liquid (Anti-freeze)
Water
Protection against
freezing to
max. 45 vol%
55%
-35°C
40 vol%
60%
-28°C
min. 35 vol%
65%
-22°C
The concentration of the protecting liquid must be maintained
under all circumstances. Therefore if the cooling liquid needs to
be refilled use only the same mixture of anti-freeze and tap
water.
-
Quantity of cooling liquid required
AIRCO03
AIRCO05
AIRCO10
AIRCO15
Fan-coil unit
Expansion tank (2/3 filled)
Cooling liquid piping ø 16 mm
Cooling liquid piping ø 25 mm
:
:
:
:
:
:
:
:
0.4 litre
0.6 litre
1.6 litre
2.2 litre
0.5 litre
3.5 litre
0.2 litre/metre
0.5 litre/metre
Table 3 can be used as guideline for the quantity required for a
complete installation.
Table 3,
Average values for the quantity of
cooling liquid required for a complete installation
Installation
Fan-coil
units
Piping,
ø 16 mm ø 25 mm
Quantity
cooling liquid
AIRCO03
2
15 m
10 m
ca. 13 litre
AIRCO05
3
18 m
12 m
ca. 15 litre
AIRCO10
5
24 m
12 m
ca. 20 litre
AIRCO15
8
30 m
20 m
ca. 26 litre
Water quality for cooling liquid
Preferably use tap water.
If another source of fresh water is used then the values shown
in the table below may not be exceeded.
Water quality
min.
pH-value at 20°C
6.5
3
max.
8.5
Chloride ion concentration [mg/dm ]
–
100
Sulphate ion concentration [mg/dm3]
–
100
Total hardness
3
12
[degrees]
Never use seawater or brackish water.
The environment protection rules applying must be
followed when discharging cooling liquids containing
protection substances.
13.0102
27
8
Overall dimensions
620
275
390
460
VAC0062
500
530
VAC0072
10 kW
5 kW
vetus®
vetus®
AIRCO
AIRCO
375
535
AIRCO03 / AIRCO05
AIRCO10
820
390
AIRCO03 /
AIRCO05
1
2
4
5
VAC0073
3
530
VAC0077
15 kW
vetus®
AIRCO10 / AIRCO15
AIRCO
735
2
3
1
4
5
AIRCO15
28
13.0102
VAC0104
273
285
VAC0081
ø 75
200
295
210
ø 16
35
G 1/4"
350
147
18
AIRCO
22
54
61
120
26
18
o
C
vetus®
VAC0082
ø3
1
2
3
4
5
53
24
20
139
Closed liquid circuit, heating ‘out’ 3/4”, ext.
Closed liquid circuit, cooling ‘out’ 3/4” ext.
Fuel supply, boiler (Diesel), ø 3 mm
Raw water ‘out’, ø 20 mm
Exhaust gases, boiler, ø 30 mm
13.0102
29
9
Electrical diagrams
Connection diagram airco 3-5 kW
L
BR1
BR2.5
+12-24VDC
RD=Rood
BL=Zwart
Hi pressure switch
Y=Geel
RD1
+
BL.5
HI
COMP
BL.5
7
BL1
SP1C
Temperature sensor
GR=Grijs
L
1
Compressor relay
LBL=Blauw
VI=Violet
TEMP
3
_
BR1
PUMP
C
8
LBL2.5
LBL2.5
BL2.5
Raw waterpump
LBL 1
6
LBL 1
LBL 1
5
LBL 1
4
VAC0015
S
R
BR1
Circulation pump
Fan
BR1
BR1
BR1
2
Compressor
BR=Bruin
BR2.5
GN=Groen
N
AIRCO03 / AIRCO05
Connection diagram Airco 10 kW
L
BR2.5
C
2
S
Pump
relay
R
RD=Rood
BL=Zwart
9
BR=Bruin
VAC0096
4
AIRCO10
30
13.0102
5
10
6
LBL2.5
Fan
GR=Grijs
LBL 1
VI=Violet
Raw waterpump
Circulation pump
Y=Geel
Extra
Circulation pump
LBL=Blauw
LBL2.5
BL2.5
GN=Groen
Compressor relay
C
S
R
8.1
Compressor 2
PUMP
7.2
BL2.5
3
TEMP
BL1
8.2
LBL2.5
Temperature sensor
SP1C
BR2.5
_
BR.5
7.1
BL1
+
BR2.5
C1
RD.5
BR2.5
C2
HI1
BL.5
LBL2.5
BL.5
BR1
L
HI2
LBL 1
GR.5
GR.5
Compressor 1
1.2
Compressor relay
1.1
BR1
Hi pressure switch 2
Hi pressure switch 1
+12-24VDC
N
Connection diagram Airco 15 kW
L
C3
C2
Y=Geel
5
10
6
LBL 1
LBL2.5
Raw waterpump
4
N
Extra
Circulation pump
Fan
GR=Grijs
Circulation pump
VI=Violet
8.1
Compressor
relay
BR2.5
S
R
8.2
Compressor 3
S
R
C
BL2.5
LBL=Blauw
S
R
9
BL2.5
BR=Bruin
LBL2.5
Pump
relay
BL=Zwart
7.3
8.3
LBL2.5
RD=Rood
GN=Groen
C
LBL 1
C
2
LBL2.5
3
TEMP
PUMP
Compressor
relay
SP1C
BL1
7.2
Compressor 2
BR.5
BL1
7.1
BR2.5
+
_
BL1
BL2.5
C1
LBL2.5
BL.5
VAC0097
BR2.5
BR2.5
BR2.5
BR1
BR1
L
LBL 1
HI3
HI1
RD.5
Temperature
sensor
HI2
LBL2.5
GR.5
BL.5
Compressor
relay
1.3
GR.5
Compressor 1
1.2
LBL.5
LBL.5
BR2.5
1.1
Hi pressure
switch 3
Hi pressure
switch 1
Hi pressure
switch 2
+12-24VDC
AIRCO15
1
2
3
4
5
6
7
8
9
10
High pressure switch
Temperature sensor
Control pcb
Fan
Circulation pump, cooling
Raw water pump
Compressor relay
Compressor
Pump relay
Extra circulation pump, cooling
RD
BL
GN
LBL
Y
VI
GR
Red
Black
Green
Blue
Yellow
Violet
Grey
13.0102
31
FOKKERSTRAAT 571 - 3125 BD SCHIEDAM - HOLLAND - TEL.: +31 10 4377700 - TELEX: 23470
TELEFAX: +31 10 4372673 - 4621286 - E-MAIL: sales@vetus.nl - INTERNET: http://www.vetus.nl
Printed in the Netherlands
13.0102 I.AIRCOE 05-02, Rev. 05-03

Air conditioning Systems

Transcription

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