NA 10.90 C
EXPAIR
11 - 2014
Instruction manual
EN
CONTENTSPAGE
1 - RECEIPT
2
2 - HANDLING
2
3 - LOCATION OF COMPONENTS
4
3.1 CW 5/8/12/16/27/39/59: Chilled water model
4
3.2 DXA 5/8/10/12/15/19/24/31/36/38/48: direct expansion model
5
3.3 Assembly/air flow direction
5
4 - INSTALLATION Unit / Casing / Plenum
6
4.1 Mounting the unit
6
5 - CONNECTIONS
6
5.1 Air connections
6
5.2 Hydraulic connections
6
5.3 Refrigerant connection, DXA model
7
5.4 Electrical connections
10
6 - TECHNICAL CHARACTERISTICS
11
6.1 Filters
11
6.2 Cooling coil:
11
6.3 Refrigerating circuit:
12
6.4 Heating coil and valve (option)
13
6.5 Air flow rate setting (indoor unit)
14
6.7 Condensate drain pump (option)
16
6.8 Humidifier (option)
17
6.9 Electric heater (option)
18
6.10 Control
18
7 - SYSTEM START-UP
19
8 - MAINTENANCE
20
9 - SERVICE INTERVAL SUMMARY TABLE:
25
10 - OPERATING READINGS
26
Original texts: French version
EN - 1
N 10.90 C
Appropriate PPE (Personal Protective Equipment)
must be worn when servicing the units
Warning
The unit must be installed and maintained by a qualified, experienced technician. Follow the operating precautions to the letter
when carrying out work on the unit. Labels have been placed on the unit to remind you of the safety instructions. As a general
rule, follow all applicable safety regulations and standards.
1 - RECEIPT
Each air conditioner has a name plate bearing an identification number. This number must be quoted in all correspondence.
In accordance with Article 133-3 of the French Code of Commerce, the recipient is entirely responsible for checking the condition
of the goods received.
In the event of missing items, the customer must provide the exact number of parcels delivered.
Any damaged or missing items must be specified on the delivery note in the presence of the driver before signing the delivery
note.
These comments must be confirmed to the carrier by registered letter within three business days.
The comments "conditional" and "pending unwrapping" shall have no value.
The client must unwrap the goods in the presence of the driver.
Claims must be made at the time of delivery and be described in detail.
● Equipment storage
The cabinet must be stored in a dry, sealed area, away from moisture and frost. The temperature in this area must not exceed
50°C.
● Equipment warranty
See general terms and conditions of sale.
2 - HANDLING
The unit must be lifted using slings or a spreader beam or be carried by a pallet truck and all four corners of the unit must be
supported by wooden blocks. In all cases, the cabinet must be raised by its base. This operation must be carried out by qualified
personnel: refer to the information on the label affixed to the equipment.
Warning: The unit must be handled with care and kept vertical.
EN - 2
N 10.90 C
● Weights and dimensions:
CW Cabinet
SIZE
Dimensions H x W x D.
Weight (kg)
5
115
1700x680x500
120
16
1900x850x780
280
27
1900x1150x780
310
39
1900x1490x780
375
59
1900x1990x780
480
8
12
125
DXA Cabinet
Indoor unit
SIZE
Dimensions
HxWxD
5
115
1700x680x500
8
10
12
15
19
24
31
36
38
48
SIZE
Weight
(kg)
CL 28
EN
CL condensation unit
Outdoor unit
Dimensions
HxWxD
Weight
(kg)
658 x 1035 x 449
69
120
CL 28
658 x 1035 x 449
69
125
CL 35
658 x 1035 x 449
69
1900x850x780
280
1900x1150x780
310
1900x1490x780
375
1900x1990x780
480
CL 35
658 x 1035 x 449
69
CL 50
1258 x 1035 x 449
101
CL 65
1258 x 1035 x 449
112
CL75
1258 x 1035 x 449
118
2 x CL 50
1258 x 1035 x 449
202
2 x CL 65
1258 x 1035 x 449
224
2 x CL 65
1258 x 1035 x 449
224
2 x CL 75
1258 x 1035 x 449
236
EN - 3
N 10.90 C
3 - LOCATION OF COMPONENTS
3.1 CW 5/8/12/16/27/39/59: Chilled water model
3
2
5
6
10
1
4
7
9
8
9
1- Filter
2- Disconnect switch
3- Control unit
4- Condensate draining
5- Cooling coil
6- Heating coil (optional)
7- Humidifier (option)
8- Fan motor assembly
9- Removable plate for hydraulic connections (bottom or right-hand side)
10- Control valve
EN - 4
N 10.90 C
3.2 DXA 5/8/10/12/15/19/24/31/36/38/48: direct expansion model
8
7
EN
3
2
5
6
10
11
4
9
1
1- Filter
2- Disconnect switch
3- Control unit
4- Condensate draining
5- Evaporator coil
6- Heating coil (optional)
7- Humidifier (option)
8- Fan motor assembly
9- Removable plate for hydraulic connections (bottom or right-hand side)
10- Expansion valve
11- Solenoid valve
3.3 Assembly/air flow direction
UNDER 1
UNDER 3
EN - 5
UNDER 4
N 10.90 C
4 - INSTALLATION Unit/Casing/Plenum
4.1 Mounting the unit
- The unit must be placed on a flat, smooth surface which is as level as possible (ratio of approx. one to one thousand).
- If the supply air is conveyed through a raised floor, the seal between the unit and the floor must be tight.
- Under normal conditions, the unit need not be floor mounted.
2
- Provide sufficient space around the unit for maintenance operations.
- The cabinet frame must rest fully on its contact surface.
Units fitted with a support base:
- The floor must be as flat as possible,
- A gasket must be installed to ensure the tightness between the unit and base platform.
- Level the unit by adjusting the legs on the support base,
→ An initial adjustment must be made using the 4 screws (no. 1)
→ Then adjust the height of the deflector (no. 2).
Default height setting:
H=225 for a raised floor height of 225 - 320mm
H=320 for a raised floor height of 320 - 525mm
1
Units supplied with a plenum:
4.2 Supply/extraction plenum:
Proposed when air is to be distributed directly into a space. It is mounted on top of the cabinet and
features double-deflection grilles to allow the direction of the air stream to be adjusted.
The plenum may also be used mounted at the bottom to carry air directly from a space back to the air
handling system.
The plenum is secured from the inside at the 4 corners. To secure it, the diffusion grille on the front panel must therefore be
removed.
5 - CONNECTIONS
5.1 Air connections
● Indoor unit
The air connection is made using rigid ducts in sheet steel or similar, fitted with a drilled connection flange. It is secured with
self-tapping screws. A gasket should be fitted between the flange and the unit.
For units to be fitted as UNDER models (air discharge to the ground), a support base is available as an option to enable this. If
the raised floor allows, a single hole is required, in the raised floor itself, with the same dimensions as the base. Tightness will be
ensured by fitting a gasket between the unit and the support frame.
5.2 Hydraulic connections
The hydraulic pipes must be routed through the plate provided for this purpose.
UNDER
(removable bottom or righthand side plate)
OVER
(Routing on the right-hand side)
1.Remove the precut foam panel,
2.Drill the external panel,
3.Make the correct cut-outs in the plate
4.Put it back in place before routing the tubing, and
seal to prevent any air bypass.
● Condensate draining
- Fit a siphon: H = 100 mm
- If the humidifier option is selected, water will not drain into the unit's drain pan.
- To have a single drain for both, connect the humidifier drain downstream of the unit's drain pan.
- When connecting or tightening the couplings, always use 2 spanners to avoid twisting the piping.
- If the condensate pump option is selected without the humidifier option, the former will be fitted inside the unit
(connection via Ø5 mm hose).
Warning: The operating pressure on the chilled or hot water network must not exceed 8 bar.
EN - 6
N 10.90 C
● Diameters of water coil connections
Cooling coil
Heating coil
CW 5
CW 8
CW 12
CW 16
CW 27
CW 39
CW59
inlet
G1/2" M
G3/4" M
G3/4" M
G3/4" M
G1" M
G1" M
G1" 1/4 M
Outlet
G1/2" M
G3/4" M
G3/4" M
G3/4" M
G1" M
G1" M
G1" 1/4 M
CW 5
DXA 5
CW 8
DXA 8
CW 12
DXA 10
CW 16
DXA 12/15
CW 27
DXA 19/24
CW 39
DXA 31/36
CW 59
DXA 38/48
inlet
G1/2" M
G1/2" M
G1/2" M
G1/2" M
G3/4" M
G3/4" M
G3/4" M
outlet
G1/2" M
G1/2" M
G1/2" M
G1/2" M
G3/4" M
G3/4" M
G3/4" M
Refer to the section on the "Humidifier" to connect the humidifier.
5.3 Refrigerant connection, DXA model
Installation precautions
The refrigerant connections between the unit and the condenser must be made by qualified personnel.
Only insulated copper refrigeration pipes must be used.
This network must be designed and constructed correctly in order to ensure the entire system operates correctly.
The pipes must be sufficiently flexible to withstand fluctuations in length, expansion and contraction. The liquid line must be
angled in order to always carry the fluid to the unit.
It is particularly important to avoid
- Excessive refrigerant pressure drop,
- Oil accumulation,
- Liquid being driven into the compressor, either when running or off,
The pipe route must:
- Neither obstruct nor be obstructed by the existing installation,
- Be protected against accidental impacts,
- Be visible in its entirety, and not encased in plaster or concrete.
- The height differences and equivalent lengths between the indoor and outdoor unit must be meet the recommendations (see
Table).
-The pipe sizing must ensure a minimum pressure drop, and the minimum and maximum speeds must be complied
with for correct circulation of the gas to drive the oil.
- Fit oil traps every 4 metres on the vertical columns to ensure the oil is returned to the compressor.
- Check that no contamination has fallen into the tube.
- Carry out all brazing operations using a nitrogen purge.
● Refrigerant connection diameters
Sizes
DXA 5
DXA 8
DXA 10
DXA 12
DXA 15
DXA 19
DXA 24
DXA 31
DXA 36
DXA 38
DXA 48
CL28
CL 28
CL 35
CL 35
CL 50
CL 65
CL 75
2 x CL 50
2 x CL 65
2 x CL 65
2 x CL 75
3/8"
3/8"
1/2"
1/2"
1/2"
1/2"
1/2"
2 x 1/2"
2 x 1/2"
2 x 1/2"
2 x 1/2"
Indoor
unit
Liquid ø
Gas ø
5/8"
5/8"
3/4"
7/8"
7/8"
1" 1/8
1" 1/8"
2 x 7/8"
2 x 7/8"
2 x 1" 1/8
2 x 1" 1/8
Outdoor
unit
Liquid ø
3/8"
3/8"
3/8"
3/8"
3/8"
3/8"
1/2"
2 x 3/8"
2 x 3/8"
2 x 3/8"
2 x 1/2"
Gas ø
5/8"
5/8"
3/4"
3/4"
3/4"
7/8"
7/8"
2 x 3/4"
2 x 7/8"
2 x 7/8"
2 x 7/8"
● Refrigerant connections (outdoor unit)
Refer to the instructions contained in the outdoor unit
EN - 7
N 10.90 C
EN
Warning: The unit is delivered with a safety charge. Refer to the table of charges in the "system start-up" chapter
● INSTALLATION PRINCIPLE
Alimentation
électrique
400V-50Hz-N+T
3-ph 400V-50Hz
-N +ETRI
power
supply
Liaison
électrique
unité
intérieure/extérieure
Electrical
connection
indoor/outdoor
unit
(unit on
outdoor
unit unité
fault report)
(ordre
decommand
marche ++report
défaut
extérieure)
Tuyauterie
(isolé)
Intake
pipesaspiration
(insulated)
Tuyauterie
Liquid
pipesliquide
Remote
control ++ fault
summary
Commande
à distance
synthèse
défauts
Alimentation
électrique
TRI 400V-50Hz+T
3-ph 400V-50Hz
+E power
supply
Note:
EXPAIR DXA 31/36/38/48 models have 2 outdoor units.
- For all electrical connections, refer to the wiring diagram sent with the indoor and outdoor unit.
- Electrical connection not supplied by CIAT
- Refrigerant pipe not supplied by CIAT
EN - 8
N 10.90 C
● Tables of maximum lengths for refrigerant connections
The tables below show the permitted lengths for the pipers and the corresponding maximum height difference.
The values in the tables show the reduction in cooling capacity as compared to the nominal capacity as a percentage.
DXA 5 + CL28 / 3/8" liquid line, 5/8" gas line
DXA 8 + CL28 / 3/8" liquid line, 5/8" gas line
Total length (m)
6
20
30
Total length (m)
Height difference (m)
6
20
30
40
Height
difference
(m)
0
0
-6
-9
50
5
0
-6
-9
0
0
-3
-5
-7
-9
10
-
-6
-
10
-
-3
-5
-7
-9
20
-
-3
-5
-7
-9
30
-
-
-5
-7
-9
DXA 10 + CL35 / 3/8" liquid line, 3/4" gas line
Total length (m)
Height difference (m)
6
20
30
40
50
0
0
-2
-4
-6
-8
10
-
-2
-4
-6
-8
20
-
-2
-4
-6
-8
30
-
-
-4
-6
-8
DXA 12 + CL35 / 3/8" liquid line, 3/4" gas line
DXA 15 + CL50 / 3/8" liquid line, 3/4" gas line
Total length (m)
Height difference (m)
6
20
30
40
50
Total length (m)
Height difference (m)
6
20
30
40
50
0
0
-2
-4
-6
-8
0
0
-2
-4
-6
-8
10
-
-2
-4
-6
-8
10
-
-2
-4
-6
-8
20
-
-2
-4
-6
-8
20
-
-2
-4
-6
-8
30
-
-
-4
-6
-8
30
-
-
-4
-6
-8
DXA 19 + CL65 / 3/8" liquid line, 7/8" gas line
DXA 24 + CL75 / 1/2" liquid line, 7/8" gas line
Total length (m)
Height difference (m)
6
20
30
40
50
Total length (m)
Height difference (m)
6
20
30
40
50
0
0
-4
-5
-6
-7
0
0
-2
-3
-4
-5
5
0
-4
-5
-6
-7
10
-
-2
-3
-4
-5
10
-
-4
-5
-6
-
20
-
-2
-3
-4
-5
-
30
-
-
-3
-4
-5
20
-
-4
-5
-
DXA 31 + 2 x CL50 / 2 x 3/8" liquid line, 2 x 3/4" gas line
Total length (m)
Height difference (m)
6
20
30
40
50
0
0
-5
-7
-8
10
-
-5
-7
20
-
-5
25
-
-
Total length (m)
Height difference (m)
6
20
30
40
50
-9
0
0
-4
-5
-6
-7
-8
-9
10
-
-4
-5
-6
-7
-7
-8
-9
20
-
-4
-5
-
-
-7
-8
-
DXA 38 + 2 x CL65 / 2 x 3/8" liquid line, 2 x 7/8" gas line
Total length (m)
Height difference (m)
6
20
30
40
0
0
-4
-5
-6
10
-
-4
-5
-6
20
-
-4
-5
-
DXA 36 + 2 x CL65 / 2 x 3/8" liquid line, 2 x 7/8" gas line
DXA 48 + 2 x CL75 / 2 x 1/2" liquid line, 2 x 7/8" gas line
Total length (m)
Height difference (m)
6
20
30
40
50
EN - 9
0
0
-5
-7
-8
-9
10
-
-5
-7
-8
-9
20
-
-5
-7
-8
-9
30
-
-
-7
-8
-
N 10.90 C
EN
5.4 Electrical connections
- The power cable run must be protected by a grommet.
-The electrical connections and wiring must be set up as shown on the wiring diagram included with the unit, and in
accordance with current codes and regulations.
- Make sure that power supply characteristics of the mains supply matches that on the unit's name plate.
- The unit must be earthed, and the power supply must always be sufficient to supply the necessary power.
- Indoor and outdoor units each have their own power supplies.
-The electrical cable must be selected based on the necessary length, power, design protection, operating mode and
in accordance with current codes and regulations.
● INDOOR UNIT electrical characteristics
3-ph 400V power supply + Earth – 50Hz
CW 5
CW 8
CW12
CW 16
CW 27
CW 39
CW 59
DXA 5
DXA 8
DXA 10
DXA 12/15
DXA 19/24
DXA 31/36
DXA 38/48
1.1
1.5
2.25
5
6.6
9.9
12
18
24
17.3
26
34.6
6
7.6
10.9
32.1
42.3
54.2
400 V
Voltage (V)
fan motor assembly
Control circuit
Electric heater
(option)
Humidifier (option)
max. value
Total current
without option
Total current
all options
Power (kW)
0.55
0.75
Current (A)
2.6
3.3
24
Voltage (V)
Current (A)
1
Voltage (V)
400
Power (kW)
3
6
9
Current (A)
4.3
8.7
13
400
Voltage (V)
Power (kW)
2.25
6
Current (A)
3.2
8.7
Current (A)
3.6
4.3
Rating of main
switch (A)
Current (A)
16
11.1
Rating of main
switch (A)
11.1
15.5
16
26
40
63
● OUTDOOR UNIT electrical characteristics
3-ph 400V power supply + Neutral + Earth – 50Hz
Refer to the instructions contained in the outdoor unit
To connect the Indoor/Outdoor unit, see the appendix at the end of the instructions.
EN - 10
N 10.90 C
6 - TECHNICAL CHARACTERISTICS
6.1 Filters
G4 filters:
F7 filters:
Thickness: 48 mm.
Efficiency: 90 % gravimetric
Filter area: 2 x face area
Fire rating: M1
Thickness: 48 mm
Efficiency: 85 % opacimetric
Filter area: 17 x face area with a thickness of 48 mm
38 x face area with a thickness of 48 mm
Fire rating: M1
EN
CW 5
CW 8
CW 12
CW16
CW27
CW 39
CW 59
DXA 5
DXA 8
DXA 10
DXA 12/15
DXA 31/36
DXA 31/36
DXA 38/48
Dimensions
508 x 465
604 x 465
700 x 465
945 x 565
945 x 400
945 x 565
945 x 500
Number
1
1
1
1
2
2
4
● Clean filter pressure drop
CW 5
DXA 5
CW 8
DXA 8
CW 12
DXA 10
CW 16
DXA 12/15
CW 27
DXA 19/24
CW 39
DXA 31/36
CW 59
DXA 38/48
Nominal flow rate (m³/h)
1 300
2 000
2 500
4 000
6 000
8 000
12 000
∆P (Pa) G4
33
49
55
53
58
53
58
∆P (Pa) F7
35
53
59
57
63
57
63
∆P (Pa) G4+F7
-
-
-
110
121
110
121
Filter fouling is measured by a pressure sensor located in the electrics box.
It is set to 1.5 times the pressure drop value for the filter when clean (pressure ports upstream and downstream of the filter).
6.2 Cooling coil:
NB: Make sure that the chilled water supply pipes are insulated.
Moderately tighten the coil supply connections to avoid damaging the manifolds.
● Coil characteristics:
Coil
specifications
Valve
specifications
CW
CW 5
CW 8
CW 12
CW 16
CW 27
CW 39
CW 59
Nominal water flow rate* (m³/h)
1.1
1.4
1.67
2.57
3.7
6.4
8.14
Capacity (I)
2.2
2.74
3.87
9.2
13.1
18.1
25.1
KV valve
1.6
2.5
4
4
10
10
16
∆Pmax (Pa) 2-way valve
1200
400
400
600
600
600
500
∆Pmax (Pa) 3-way valve
250
100
240
600
600
600
500
*Return air conditions 24°C RH 50%, water temperature 7/12 °C
NB: Refer to your temperature range selection sheet for the technical information (capacity, water flow, water flow rates, pressure
drops, etc.).
EN - 11
N 10.90 C
6.3 Refrigerating circuit:
DXA schematic diagram:
1 REFRIGERATING CIRCUIT
DXA 5 to 24
3
4
1
2
5
1- Evaporator coil
2- Thermostatic expansion
valve
2 REFRIGERATING CIRCUITS
3- Compressor
4- Dehumidifier filter
5- Condenser coil
DXA 31 to 49
3
4
3
4
EN - 12
N 10.90 C
Refrigerant R410A charges
Table 1: Charge in kg per circuit, distance between CABINET and CL = 0m
EXPAIR
Cabinet
DXA 5
DXA 8
DXA 10
DXA 12
DXA 15
DXA 19
DXA 24
DXA 31
DXA 36
DXA 38
DXA 48
Outdoor
Unit
CL 28
CL 28
CL 35
CL 35
CL 50
CL 65
CL 75
2xCL 50
2xCL 65
2xCL 65
2xCL75
Charge in kg
1.69
1.69
1.952
1.952
3.134
3.68
3.894
3.334
3.38
4.38
4.594
OPTION
OPTION
OPTION
OPTION
STD
STD
STD
STD
STD
STD
STD
Heater
Crankcase*
*maximum charge without crankcase heater: 4.5 kg
Table 2: Charge in kg per circuit to be added according to distance between CABINET/CL
Distance (m)
Type of CL
1
3
6
9
12
15
20
25
30
35
40
45
50
28
0.055
0.165
0.33
0.495
0.66
0.825
1.1
1.375
1.65
1.925
2.2
2.475
2.75
35
0.058
0.174
0.348
0.522
0.696
0.84
1.16
1.45
1.74
2.03
2.32
2.61
2.9
50
0.061
0.183
0.366
0.549
0.732
0.915
1.22
1.525
1.83
2.135
2.44
2.74
3.05
65
0.07
0.21
0.42
0.63
0.84
1.05
1.4
1.75
2.1
2.45
2.8
3.15
3.5
75
0.101
0.303
0.606
0.909
1.212
1.515
2.02
2.525
3.03
3.535
4.04
4.545
5.05
CL condensation units are delivered pre-charged. The charge of 410A contained must be deducted from the value above for
your installation.
Pre-charge value: CL 28-35 = 1 kg
CL 50-65-75 = 2kg
On-site charge calculation per circuit = Table 1 charge + table 2 charge - CL pre-charge
6.4 Heating coil and valve (option)
Moderately tighten the "coil supply" connections to avoid damaging the
manifolds.
● Coil and valve characteristics:
Coil
characteristics
Valve
characteristics
Sizes
CW 5
DXA 5
CW 8
DXA 8
CW 12
DXA 10
CW 16
DXA 12/15
CW 27
DXA 19/24
CW 39
DXA 31/36
CW 59
DXA 38/48
Nominal water
flow rate* (m³/h)
0.2
0.25
0.33
0.6
0.86
1.21
1.24
Capacity (I)
0.56
0.67
0.78
1.67
2.35
3
4
KV valve
1.6
4
∆Pmax (Pa)
2-way valve
1200
400
∆Pmax (Pa)
3-way valve
250
250
250
250
240
240
240
*Nominal flow rate, water T∆: 20°C
NB: Refer to your temperature range selection sheet for the technical information (capacity, water flow, water flow rates, pressure
drops, etc.).
EN - 13
N 10.90 C
EN
6.5 Air flow rate setting (indoor unit)
The air flow rate is set manually on the frequency inverter located in the electrics box for the indoor unit. The table below gives
the air flow rate value in m3/h according to the operating pressure and the position of the frequency inverter.
Inverter frequency (Hz)
Operating pressure (Pa)
CW 5
DXA 5
CW 8
DXA 8
CW 12
DXA 10
CW 16
DXA 12/15
CW 27
DXA 19/24
CW 39
DXA 31/36
CW 59
DXA 38/48
30
35
40
45
50
55
60
0
1 100
1 300
-
-
-
-
-
50
850
1 100
1 300
-
-
-
-
100
-
800
1 250
1 300
-
-
-
150
-
-
1 150
1 300
-
-
-
200
-
-
-
1 100
1 300
-
-
0
1 350
1 600
1 850
2 000
-
-
-
50
1 100
1 400
1 700
1 900
2 000
-
-
100
-
1 150
1 450
1 700
2 000
-
-
150
-
-
1 000
1 450
1 950
2 000
-
200
-
-
-
1 200
1 750
1 950
2 000
0
1 350
1 650
1 900
2 250
2 450
2 500
-
50
900
1 450
1 750
2 100
2 300
2 450
2 500
100
600
1 150
1 550
1 950
2 150
2 300
2 500
150
-
650
1 250
1 750
2 000
2 100
2 400
200
-
-
750
1 500
1 800
1 950
2 200
0
2 600
3 100
3 550
4 000
4 000
-
-
50
2 250
2 750
3 300
3 800
4 000
-
-
100
1 800
2 400
3 000
3 550
4 000
-
-
150
-
1 950
2 700
3 300
3 850
-
-
200
-
-
2.250
3 000
3 600
-
-
0
4 100
4 850
5 650
6 000
-
-
-
50
3 500
4 400
5 250
6 000
-
-
-
100
2 750
3 850
4 800
5 550
6 000
-
-
150
-
3 200
4 350
5 200
6 000
-
-
200
-
-
3 650
4 750
5 750
-
-
0
4 950
5 850
6 750
7 650
8 000
-
-
50
4 300
5 300
6 300
7 250
8 000
-
-
100
3 400
4 650
5 700
6 800
7 800
-
-
150
-
3 750
5 100
6 300
7 350
-
-
200
-
-
4 300
5 650
6 900
-
-
0
7 300
8 650
10 000
11 300
12 000
-
-
50
6 250
7 800
9 300
10 750
12 000
-
-
100
5 000
6 800
8 450
10 050
11 600
-
-
150
-
5 550
7 550
9 300
10 900
-
-
200
-
-
6 400
8 450
10 200
-
-
NB: Air flow rate values with G4 filter and without the hot water coil option.
Min. air flow rate (m3/h)
Min. air flow
rate
value (m³/h)
DXA 5
DXA 8
DXA 10
DXA 12
DXA 15
DXA 19
DXA 24
DXA 31
DXA 36
DXA 38
DXA 48
600
900
950
2 000
2 000
4 000
4 000
6 000
6 000
8 000
8 000
EN - 14
N 10.90 C
% Fan setting on regulator
% Fan setting on regulator
100
100
83
75
66
50
50
EN
33
25
16
0
30
35
40
45
50
0
30
35
40
50
45
Frequency (Hz)
DXA 5 / CW 5
DXA 8 / CW 8
DXA 12/15 / CW 16
DXA 19/24 / CW 27
DXA 31/36 / CW 39
DXA 38/48 / CW 59
55
60
Frequency (Hz)
DXA 10 / CW 12
● VACON frequency inverter
The vertical self-contained air-conditioning unit is delivered to you with the frequency inverter fully configured in the
factory. The rotation frequency has been configured to your flow rate/pressure elements, as provided when the order
was placed.
This value may be adjusted on site on the controller:
- Parameter P155 (µAir Connect2 controller)
- No control, inside the electrics box.
In the event of a fault, a code is displayed on the variable speed drive. Please contact us, quoting the fault code:
Depending on the cabinet, the frequency inverter has a programming code:
Size
Code
Size
Code
Inverter fault code
F = Fault
Overcurrent
CW 5
1
DXA 5
8
1
CW 8
2
DXA 8
9
2
Overvoltage
Earthing fault
CW 12
3
DXA 10
10
3
CW 16
4
DXA 12
11
8
System fault
CW 27
5
DXA 15
12
9
Undervoltage
CW 39
6
DXA 19
13
13
Under-temperature
CW 59
7
DXA 24
14
14
Over-temperature
DXA 31
15
15
Motor stalled
DXA 36
16
16
Motor over-temperature
DXA 38
17
22
EEPROM fault
DXA 49
18
25
Watchdog fault
34
Internal bus fault
35
Application fault
50
Analogue input fault
51
External fault
53
External bus fault
NB: all faults systematically stop the cabinet and "Motor fault" is displayed on the controller
EN - 15
N 10.90 C
6.7 Condensate drain pump (option)
Condensate pan
Specifications:
• 230V-50 Hz-35W power supply
• Max. flow rate: 30 l/h
• Max. discharge height: 10 m
Condensate drain
pump
● Table of actual flow rates
the pressure drops defined
in this table are calculated
with a hose
6 mm in diameter
NPSH
0m
Total pipe length
Discharge
height
(m)
5m
(l/h)
10 m
(l/h)
20 m
(l/h)
30 m
(l/h)
1
29
27
25
23
2
27.5
25.5
24
22
3
25.5
24
22
20.5
4
23.5
22
20
19
5
21
19.5
18
16.5
16.5
15
14
6
7
14
12.5
11.5
8
11.5
10
9
9
9
7.5
6.5
10
6
5
4
EN - 16
N 10.90 C
6.8 Humidifier (option)
The immersed-electrode humidifier is fitted with a microprocessor-based controller that adapts, within the allowable operating
limits, to the physical and chemical properties of the water used.
Current passes through the water between the immersed electrodes, heating it to boiling point.
The water acts as an electrical resistance, ensuring continuity between the electrodes and a minimum of dissolved salts.
CW 5/8/12
DXA 5/8/10
CW 16/27/39/59
DXA 12/15/19/24/31/36/38/48
Make/model
KUE T1 COW21
KUE T2 COW21
Control voltage
24 V
24 V
Power input in control
circuit
EN
Without 9 V A valve; with 35 V A valve
Power voltage
3-PH/400 V
3-PH/400 V
Power circuit current (A)
3.2A
8.7A
Protection rating
10A
16A
Max. steam flow rate
3 kg/h
8 kg/h
Max. power (KW)
2.25
6
Factory steam flow rate setting
CW 5/DXA 5:
1.5 kg/h
CW 8/DXA 8:
CW 12/DXA 10:
1.9 kg/h
2.4 kg/h
CW 5/DXA 5:
CW 8/DXA 8:
CW 12/DXA 10:
1.13 kW
1.45 kW
1.8 kW
CW 16/DXA 12/15:
3.9 kg/h
5.7 kg/h
7.7 kg/h
8 kg/h
CW 27/DXA 19/24:
CW 39/DXA 31/36:
CW 59/DXA 38/48:
Factory power setting
0.6 l/min
6 kW
1.2 l/min
Conductivity of supply water
350 to 1250 µS/cm
Hardness of supply water
100 to 400 TH
Drain water flow rate
10 l/min
Water supply ø
G 3/4 M
Drain ø
32 M
Weight
2.88 kW
4.32 kW
5.75 kW
1 to 10 bar
Water supply pressure
Max. water supply flow rate
CW 16/DXA 12/15:
CW 27/DXA 19/24:
CW 39/DXA 31/36:
CW 59/DXA 38/48:
2 kg
3.3 kg
If a water softener or water treatment system is used, the water hardness must not be less than 40% of the initial hardness and
never be less than 15°F.
EN - 17
N 10.90 C
6.9 Electric heater (option)
● Characteristics:
Choice of electric heater per model
- Galvanised sheet metal panels
- Shielded tubing with scrolled fins
- High-inertia heater
- Supply voltage: three phase 400 V 50Hz
- Control: 2 stage or TRIAC depending on the option selected.
CW 5
DXA 5
CW 8
DXA 8
CW 12
DXA 10
CW 16
DXA 12/15
CW 27
DXA 19/24
CW 39
DXA 31/36
CW 59
DXA 38/48
6.0
9.0
12.0
18.0
24.0
6.0
6.0
12.0
12.0
3.0
6.0
6.0
12.0
3.0
Power (kW)
Power
(kW)
- Stage 1
Number of
heaters:
- Stage 1
- Stage 2
- Stage 2
Total current (A)
3.0
-
-
-
-
3.0
3 x 1 kW
3 x 2 kW
3 x 1 kW
4.3
8.7
3 x 2 kW
13
17.3
3 x 4 kW
3 x 4 kW
3 x 4 kW
26
34.6
6.10 Control
CIAT µAir Connect 2 configurable controller. For setting and configuration, refer to the corresponding manual
CIAT µAIR CONNECT 2
EN - 18
N 10.90 C
7 - SYSTEM START-UP
All operations on the refrigerating circuit must be carried out in accordance with the applicable
environmental regulations.
After making the necessary electrical and hydraulic connections, carry out the system start-up and check the following steps:
- Check the tightness of the electrical connections,
- Check the hydraulic connections (direction of inlet/outlet connections),
- Make sure the inside of the cabinet is clean and free from any foreign bodies,
-C
heck the power supply voltage and heat protection calibration in accordance with the current ratings of the various
elements,
- Check the siphon height,
- Vent the air from the coils via the air bleed valves,
- Check the tightness of the circuits; retighten the valve if necessary,
- To configure the setpoints, refer to the "µAIR CONNECT" manual
- The air flow rate can be adjusted manually using the inverter
- If a master/slave control system is used, make sure that the connection cable between the cabinets is in place.
- Depressurise the system until -0.1 M Pa (-760 mm Hg) is obtained,
- Fill with the required quantity of refrigerant (for charges see the "Refrigerating circuit" chapter),
- Simulate activation of the various electrical components, controlled components and alarms.
- Check the currents.
● Standard components:
- Temperature alarm,
- Air flow rate alarm,
- Condensation unit,
- Fan motor assembly
● Optional components:
- Temperature low limit alarm,
- Outer contact control,
- Electric heater,
- Humidifier
- Hot water valve
- Check the cleanliness of the humidifier supply water (option),
- After allowing the unit to run for a few hours, check the filter fouling condition, especially in the case of an F7 filter.
EN - 19
N 10.90 C
EN
8 - MAINTENANCE
It is possible to remove the doors in order to facilitate access to the various components.
For dual doors:
Open the left-hand door using the centre latch and lower the 2 right-hand door targets (for dual doors).
Pull out the pin and remove the hinge (Detail B).
Lift off the door (Detail C).
DETAIL A
DETAIL B
DETAIL C
EN - 20
N 10.90 C
8.1 Filters
Check the filters frequently during system start-up. The rate at which they will clog will depend on how well the air circuits were
cleaned.
● Maintenance frequency
The filter life depends essentially on the amount of dust in the air and the efficiency of the filtration system. The filtration quality
cannot be maintained if the filter medium has been damaged during maintenance. We recommend that the filters be replaced
once every two years, even in the case of moderate use
● Filter element replacement method
When performing maintenance, it is important to avoid releasing and spreading the dust that has accumulated in the filter.
Turn off the unit.
Access the filters by opening the panels on the front,
For sizes CW 5/8/12, DXA 5/8/10.
Fig. 1
Press the lug and pull it towards you (no.1) to unclip it and release the filter.
Note: The lug remains attached to the support bracket (no.2).
1
2
2
2
1
For other sizes
Fig. 2
Remove the spring (no.1) from the runner (no.2).
Remove the filters by moving the runner aside.
Replace the used filters with new filters using cells fitted with a gasket. Take care to note the direction of air flow indicated on
the new filters.
Always make sure that the filter elements are properly positioned before compressing them or turning the unit back on.
8.2 Cooling coil
● Maintenance frequency
As the cooling coil is protected by a filter, its air circuits require very little maintenance.
Always cut the power supply to the cabinet before any cleaning operations
EN - 21
N 10.90 C
EN
8.3 Electric heater
● Maintenance frequency
The electric heater requires very little maintenance. However, the following checks are necessary:
Visually inspect the heating elements, wires and connection cables after every 1500 hours of operation.
Check and retighten the connections once or twice a year.
● Cleaning procedure
To access the electric elements, remove the removable side panel by
turning the latch a quarter turn
Accessing heating elements located behind the hydraulic coil.
Cleaning using an air nozzle.
To remove the heaters
- unscrew the bolt and remove the washer, and push the pin
backwards to release it from its housing. Follow the assembly
process in reverse order
EN - 22
N 10.90 C
8.4 Humidifier
● Maintenance
Clean the humidifier once a year and replace its tank.
● Cleaning or replacing the steam cylinder
This operation is necessary when the deposits that form on the active surface of the electrodes prevent the correct flow of current
(alarms E08, E06).
To remove the tank:
-Drain the tank completely via the manual drain programme actuated by the control (See extract from the control
manual N09.41 paragraph 6.2, parameter no.911)
- Cut the power supply to the unit via the switch or via the line fuses,
EN
- Remove the cylinder steam pipe,
- Disconnect the main electrodes and remove the pins from the level electrodes,
- Remove the retention spring, the cylinder and lift up and out.
In general, the steam tank can be reused after being descaled (scale on the electrodes prevents the free flow of water and
current).
If the electrodes are too badly affected the tank must be replaced: Only the tank body and seal need to be changed.
Check the gasket and replace it if need be. Put the tank back in place by following the above steps in reverse order.
● Cleaning the unit and seasonal maintenance
The unit must be checked and cleaned once a year or after it is shut off for an extended period. Remember to always first drain
the water from the tank and to cut the power supply.
- Procedure:
Remove or wash the water supply valve. Check the inlet filter for clogging,
If the pump malfunctions or becomes worn, it must be replaced.
Inspect the water supply, steam supply and condensate drain pipes and replace them if necessary.
CHARGING UNIT
Flow regulator
In case of a fault on the humidifier (no steam produced), check the water
conductivity: it must be between 350 and 1250µS/cm.
In case of repeated scaling, check the water hardness: 15°F<TH<30°F
Filling solenoid valve
Water top-up
Drain pump
Water drainage
EN - 23
N 10.90 C
8.5 Fan
Check and retighten the connections once a year.
● Fan removal method:
- Remove the 4 screws holding the fan in place (no.1) to separate it from the air supply panel (no.2).
2
1
1
2
8.6 Electrics box
Retighten the connections once a year.
Visually inspect the components, wires and cables.
EN - 24
N 10.90 C
9 - SERVICE INTERVAL SUMMARY TABLE:
Regular maintenance will keep the unit running at optimum performance. The values given in the table below are provided for
guidance only. They do not take into account individual factors that can lengthen or shorten the unit's service life.
DEVICE
AT SYSTEM START-UP
2-3 MONTHS
12 MONTHS
Filters
-Replace
-Replace
Cooling coil
-Clean
- Check and clean the condensate
drains
-Check the connections
-Clean
-Retighten the electrical connections
-Check the components
Humidifier (option)*
-Check the connections
- Check the condition of the cylinder,
replacing it if necessary
- Retighten the electrical connections
- Check the components
- Check the condensate drains
-Make sure that steam is evenly
distributed
Fans
-Check the connections
Electrics box
-Check the connections
Electric heater (option)
-Retighten the electrical connections
-Retighten the electrical connections
-Check the components
Hydraulic circuit
Water leak detection sensor and relay
-Check correct operation
-Check correct operation
-Check the components
-Check the insulation
-Check correct operation
Filter pressure switch
-C
heck correct operation and setpoint
adjustment
- Check correct operation and setpoint
adjustment
- Check correct operation and setpoint
adjustment
Thermostat and fire control relay
-Check correct operation
-Check correct operation
-Check correct operation
Valve
-C
heck circuit for correct operation and
tightness
CL condensation unit
Refer to the corresponding instructions
-Check correct operation
* If a water softener or water treatment system is used, the water hardness should not be less than 40% of the initial hardness
and should never be less than 15°f.
EN - 25
N 10.90 C
EN
10 - OPERATING READINGS
Plate heat
exchanger
Heat
exchange coil
Compressor
Date/Time
Extraction pressure (bar)
Extraction temperature (°C)
Condensation pressure (bar)
Condensation temperature (°C)
Gas/liquid inlet temperature (°C)
Gas/liquid outlet temperature (°C)
Air inlet temperature (°C)
Air outlet temperature (°C)
Water inlet temperature (°C)
Water outlet temperature (°C)
Gas/liquid inlet temperature (°C)
Gas/liquid outlet temperature (°C)
Rated voltage (V)
Voltage at terminals (V)
Compressor absorbed current (A)
Fan motor absorbed current (A)
Mechanical check: pipes, screws, etc.
Electrical connection tightness check
Outdoor coil cleaning
Check the control
Differential pressure switch
Sealing test
Filter check
EN - 26
N 10.90 C
EN
EN - 27
N 10.90 C
CIAT Service
Tel.: 08 11 65 98 98 - Fax: 08 26 10 13 63
(€0.15/mn)
Non-contractual document. With the thought of material improvement
always in mind, CIAT reserves the right, without notice
to proceed with any technical modification.
Siège social
Avenue Jean Falconnier B.P. 14
01350 Culoz - France
Tel. : +33 (0)4 79 42 42 42
Fax : +33 (0)4 79 42 42 10
info@ciat.fr - www.ciat.com
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d’Applications Thermiques
S.A. au capital de 26 728 480 €
R.C.S. Bourg-en-Bresse B 545.620.114
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