CIAT EREBA ACCESS 17-40 T/HT User manual

EREBA ACCESS 17-40 T/HT
11 - 2017
X0178
Instruction manual

EN
EN - 1 EREBA ACCESS 17 - 40 T/HT
CONTENTS PAGE
1 - Physical data and electrical data - model T 2
2 - Physical data and electrical data - model HT 3
3 - Dimensions and location of hydraulic connections (mm) 4
4 - User interface and main switch 5
4.1. Clearances (mm) for horizontal outlet unit (EREBA ACCESS 017-021) 5
4.2. Clearances (mm) for vertical outlet unit (EREBA ACCESS 026-040) 5
5 - General information and hydraulic module 6
6 - Water connections 8
7 - Electrical connections and refrigerant charge 11
8 - Refrigerant charge and electronic control 13
9 - Start-up, compressor replacement 14
10 - Pump replacement, unit protection devices 15
11 - Unit protection devices, operating limits and operating range 17
12 - General maintenance, maintenance and final recommendations 19
13 - Troubleshooting 21
Start-up check list
Start up date _________________________
Equipment sold by: _________________________________________________ Contract No:_________________________________
Installed by: _______________________________________________________ Contract No:_________________________________
Site address____________________________________________________________________________________________________
Equipment type and serial No: EREBA ACCESS ___________________________________________________________
EREBA ACCESS HT_________________________________________________________
ELECTRICAL DATA:
Supply voltage Ph 1: _______________V Ph 2: _______________V Ph 3: ________________V
Nominal voltage: _________________________________________ V % network voltage____________________________
Current draw Ph 1: _______________A Ph 2: _______________A Ph 3: _________________A
Control circuit voltage:_____________________________________ V Control circuit fuse__________________________A
Main circuit breaker rating________________________________________________________________________________________
PHYSICAL DATA
Coil: Plate heat exchanger:
Entering air temp.:____________________________°C Entering water temp.: _____________________ °C
Leaving air temp.: ____________________________°C Leaving water temp.: ______________________ °C
Loss of head (water): ______________________ kPa
SAFETY DEVICE SETTING:
High pressure switch: cut-out: __________________kPa cut-in: ________________________ kPa
Oil level _______________________________________________________________________________________________________
OPTIONS:
Commissioning engineer_________________________________________________________________________________________
Customer agreement
Name:______________________________________ Date:___________________________________
Note: Complete this start-up list at the time of installation.

EREBA ACCESS 17 - 40 T/HT EN - 2
1 - PHYSICAL DATA AND ELECTRICAL DATA - MODEL T
Table I: Physical data - Model T
Table II: Electrical data - Model T
EREBA 017 021 026 033 040
Operating weight
with hydraulic module
Kg 189 208 255 280 291
Refrigerant charge R-410A Kg 5.5 6.4 5.8 8.6 8.8
teqCO2 11.5 13.4 12.1 18 18.4
Compressor One scroll compressor
Evaporator One plate heat exchanger
Net water volume l 1.52 1.9 1.71 2.28 3.8
Water connections (MPT gas) inches 1 1 1-1/4 1-1/4 1-1/4
Maximum water pressure kPa 400 400 400 400 400
Hydraulic module Pump, mesh lter, expansion tank, ow switch, automatic air purge valve and drain plug
and relief valve.
Pump One single-speed pump
Water inlet connection (MPT gas)
inches 1-1/4 1-1/4 1-1/4 1-1/4 1-1/4
Water outlet connection (MPT gas) inches 1 1 1-1/4 1-1/4 1-1/4
Closed expansion tank water volume l 5 5 8 8 8
Pre-charge of expansion vessel bar 1.5 1.5 1.5 1.5 1.5
Condenser One, copper tubes and aluminium ns
Fan Two,axial type with two speeds Two-speed axial type
Diameter mm 495 495 710 710 710
No. of blades 3 3 7 7 7
Air ow (high speed) l/s 2212 2212 3530 3530 3530
Fan speed (high speed) g/min 870 870 900 900 900
Sound levels
Sound power level 10-12 W* dB(A) 72 74 78 78 80
* Declared dualnumber noise emission values in accordance with ISO 4871 (with an associated uncertainty of +3dB). The values have been rounded and
are for information only and not contractually binding.
EREBA ACCESS T 017 021 026 033 040
Power V-ph-Hz 400-3+N-50 (power supply option C) or 400-3-50 (power supply option D) 400-3-50
(STD - no option)
Voltage range V 340-460 360-440
Starting current* A 75 95 118 118 176
Maximum power drawn (Vn) ** kW 7.8 9.1 11.0 13.8 17.5
Nominal current drawn*** A 8 12 16 17 25
Maximum current (Vn) **** A 13 16 20 24 30
Maximum current (Vn +/-15 or 10%) † A 15 18 23 27 36
* Max. starting current within the operation limits (corresponding to the current of locked rotor in the compressor)
** Input power when the unit is at its operation limits (evaporation temperature = 10°C, condensation temperature = 65°C) and at the rated voltage (400 V)
*** The currents shown refer to Eurovent conditions (evaporator water inlet and outlet temperature = 12/7°C with air to the condenser at 35°C)
**** Max. operating current related to the max. input power and rated voltage (400 V)
† Max. operating current related to the max. input power and within the range 340-460 V for units size 17 to 33 kW, and 360-440 V for units size 40 kW.

EN
EN - 3 EREBA ACCESS 17 - 40 T/HT
2 - PHYSICAL DATA AND ELECTRICAL DATA - MODEL HT
Table I: Physical data - Model HT
Table II: Electrical data - Model HT
EREBA ACCESS HT 017 021 026 033 040
Power V-ph-Hz 400-3+N-50 (power supply option C) or 400-3-50 (power supply option D) 400-3-50
(STD - no option)
Voltage range V 340-460 360-440
Starting current* A 75 95 118 118 176
Maximum power drawn (Vn) ** kW 7.8 9.1 11.0 13.8 17.5
Nominal current drawn*** A 8 12 16 17 25
Maximum current (Vn) **** A 13 16 20 24 30
Maximum current (Vn +/-15 or 10%) † A 15 18 23 27 36
* Max. starting current within the operation limits (corresponding to the current of locked rotor in the compressor)
** Input power when the unit is at its operation limits (evaporation temperature = 10°C, condensation temperature = 65°C) and at the rated voltage (400 V)
*** The currents shown refer to Eurovent conditions (evaporator water inlet and outlet temperature = 12/7°C with air to the condenser at 35°C)
**** Max. operating current related to the max. input power and rated voltage (400 V)
† Max. operating current related to the max. input power and within the range 340-460 V for units size 17 to 33 kW, and 360-440 V for units size 40 kW.
EREBA ACCESS HT 017 021 026 033 040
Operating weight
with hydraulic module Kg 206 223 280 295 305
Refrigerant charge R-410A Kg 6.4 7.7 7.6 9.5 9.8
teqCO2 6.4 7.7 7.6 9.5 9.8
Compressor One scroll compressor
Evaporator One plate heat exchanger
Net water volume l 1.52 1.9 2.28 2.85 3.8
Water connections (MPT gas) inches 1 1 1-1/4 1-1/4 1-1/4
Maximum water pressure kPa 400 400 400 400 400
Hydraulic module Pump, mesh lter, expansion tank, ow switch, automatic air purge valve and drain plug
and relief valve.
Pump One single-speed pump
Water inlet connection (MPT gas) inches 1-1/4 1-1/4 1-1/4 1-1/4 1-1/4
Water outlet connection (MPT gas) inches 1 1 1-1/4 1-1/4 1-1/4
Closed expansion tank water volume l 5 5 8 8 8
Pre-charge of expansion vessel bar 1.5 1.5 1.5 1.5 1.5
Condenser One, copper tubes and aluminium ns
Fan Two, axial type with two speeds Two-speed axial type
Diameter mm 495 495 710 710 710
No. of blades 3 3 7 7 7
Air ow (high speed) l/s 2217 1978 3530 3530 3530
Fan speed (high speed) g/min 870 870 900 900 900
Sound levels
Sound power level 10-12 W* dB(A) 72 74 78 78 80
* Declared dualnumber noise emission values in accordance with ISO 4871 (with an associated uncertainty of +3dB). The values have been rounded and
are for information only and not contractually binding.

EREBA ACCESS 17 - 40 T/HT EN - 4
3 - DIMENSIONS AND LOCATION OF HYDRAULIC CONNECTIONS (MM)
1. Ingresso acqua 2. Uscita acqua 3. Uscita valvola di sicurezza 3/4”gas
1 water inlet
2 water outlet
3 relief valve outlet
4 electrical connections
Mod. EREBA ACCESS T 017 - 021
Mod. EREBA ACCESS HT 017 - 021
(Fixing holes ø 10)
(Fixing holes ø 10)
1 water inlet
2 water outlet
3 electrical connections
Mod. EREBA ACCESS T 026 - 040
Mod. EREBA ACCESS HT 026 - 040
710 (Fixing holes ø 10) 745 (Fixing holes ø 10)

EN
EN - 5 EREBA ACCESS 17 - 40 T/HT
4 - USER INTERFACE AND MAIN SWITCH
Clearances (mm) for horizontal outlet unit
(EREBA ACCESS 017-021)
Clearances (mm) for vertical outlet unit (EREBA
ACCESS 026-040)
200 mm
300 mm
300 mm
200 mm
200 mm
200 mm
200 mm
400 mm
400 mm 400 mm 400 mm
500 mm
700 mm
700 mm
1000 mm
1000 mm
200 mm 200 mm
200 mm
200 mm
200 mm
400 mm
400 mm
500 mm
500 mm
400 mm 1800 mm
* Check that the user interface is protected as described in section “Electronic control”.
User interface*
Service door
Disconnector
Service door
User interface*
Disconnector

EREBA ACCESS 17 - 40 T/HT EN - 6
5 - GENERAL INFORMATION AND HYDRAULIC MODULE
Unit installation
Read this manual thoroughly before starting machine
installation.
The device complies with the low voltage directives, Machinery
Directive and EMC Directive.
• The installation must be carried out by a qualied installer.
• Follow all current national safety code requirements. In particular ensure
that a properly sized and connected ground wire is in place.
• Check that voltage and frequency of the mains power supply are
those required; the available power must be adequate to operate any
other possible appliances connected to the same line. Also ensure that
national safety code requirements have been followed for the mains
supply circuit.
• After installation thoroughly test the system operation and explain all
system functions to the owner.
• Leave this manual with the owner for consultation during future
periodic maintenance.
• Be sure the unit and its components are checked periodically to look for
loosen, damaged or broken components. In case of persisting defects,
the unit may cause personal injury or property damage.
IMPORTANT :
During the unit installation make rst the hydraulic connections
and then electrical connections. If unit is uninstalled rst disconnect
electrical cables, then the hydraulic connections.
CAUTION :
Disconnect the mains power supply switch before servicing the
system or handling any internal parts of the unit.
• The manufacturer declines any liability for damage resulting from
modications or errors in the electrical or hydraulic connections.
• Failure to observe the installation instructions or use of the unit under
conditions other than those indicated inTables “Operating limits”, will
immediately void the unit warranty.
• Failure to observe electric safety codes may cause a re hazard in case
of short circuits.
• Do not install or use damaged units.
• During unit operation, some of the refrigerant circuit elements could
reach a temperature in excess of 70oC, so only trained and qualied
personnel should access areas protected by access panels.
• In case of any malfunctioning turn the unit o, disconnect the mains
power supply and contact a qualied service engineer.
• All of the manufacturing and packaging materials used for your
new appliance are compatible with the environment and can be
recycled.
• Dispose of the packaging material in accordance with local
requirements.
• This equipment contains refrigerant R-410A that must be disposed of
in a proper manner. When disposing of the unit after its operational life,
remove it carefully. The unit must then be delivered to an appropriate
disposal center or to the original equipment dealer.
• Carefully recover refrigerant within this unit before nal disposal or
when servicing. Never vent refrigerant to atmosphere.
Choosing the installation site
• This unit should not be installed in an explosive atmosphere.
• The unit can operate in normal radioelectric atmospheres in residential,
commercial and light industrial installations. For other applications,
please consult CIAT.
• In the case of heat pump operation with an outdoor temperature of
less than 0 °C the unit must be installed at least 300 mm above ground
level. This is necessary to prevent ice from accumulating on the frame
and to permit correct operation also in the event of heavy snowfalls.
The unit must be levelled on both axes (the tolerance is less than 2
mm per metre).
• In some cases it may be necessary to t deectors against strong winds
and to stop snow from hitting the coil directly. These deectors must
be installed so that the normal air circulation is not obstructed.
CAUTION:
Typical applications of these units are in refrigeration systems, and
they do not require earthquake resistance.
Earthquake resistance has not been veried.

EN
EN - 7 EREBA ACCESS 17 - 40 T/HT
Condensate pan
Connection
Fan supply
The standard ducted units are supplied with a rectangular ange.It is
advisable to connect the supply duct by interposing a exible joint to
avoid vibrations and noise are transmitted to the building structure. Do
not use ducts with a weight exceeding 10 kg to avoid damages to the unit.
Make sure all intake inlets and air outlets are free from any obstacle (such
as an open door).
Auxiliary condensate drain pan
During the heat pump operation, it might be necessary to drain up to
15 l of condensate.
On demand, Ciat may supply an optional condensate drain pan to be
placed under the unit. The corresponding codes are 7511632 (for units
17 – 21 kW) and 7511634 (for units 26 – 40 kW).
The pan must then be connected to the condensate drainage system by
means of a ø 16 mm vinyl pipe (use the condensate drainage connection
supplied with the pan).
On sizes 26- 40 kW, it is possible to disconnect the end of the condensate
drain pipe which is xed to the rear panel and convey the condensate
water from the heat exchanger to the auxiliary pan.
When installing the pan, make sure it is levelled and that the condensate
water from the unit is discharged correctly.
Siting the unit
Check that:
- The location is able to support unit operating weight (Table I).
- There is sucient space for servicing and air ow around the unit (see
“Clearances”gure).
- The selected site is without dust or foreign material which could
obstruct the coil.
- When installing the unit on the ground, the selected site is not subject
to ooding.
- The installation is in accordance with local rules and standards
governing the installation of air conditioning equipment.
- Vibration absorbers have been provided throughout the installation
to prevent noise from being transmitted.
- To avoid possible damages (in particular to sizes 26-40 kW) x the
vibration absorbers under a feet-supporting frame of the unit.
- No force or eort must be applied to pressurised parts.
Transport
1. Use spreader bars to lift the unit to avoid damage to the panels. Avoid
violent movements.
2. Never roll or swing the unit more than 15°.
IMPORTANT:
Ensure that all unit panels are xed in place before moving the unit.
Raise and set down the unit carefully.
IMPORTANT:
Always ensure that the unit is levelled correctly
.

EREBA ACCESS 17 - 40 T/HT EN - 8
1 automatic purge
2 drain valve
3 pump
4 Relief valve
5 ow switch
6 expansion vessel
7 mesh lter
8 pressure reducer (optional)
Hydraulic module for EREBA
ACCESS T/HT017-021 unit
10
12
15
15
16
17
17
18
18
19
20
20
21
22
23
24
24
25 26
11
Typical diagram of hydraulic circuit with hydraulic module 17-21kw
1 automatic purge
2 drain valve
3 pump
4 Relief valve
5 ow switch
Hydraulic module for EREBA
ACCESS T/HT026-040 unit
Hydraulic module
The hydraulic module is factory-installed.
This eliminates the need to install the necessary components
on-site, making the unit more compact and easy to install.
6 expansion vessel
7 mesh lter
8 pressure reducer (optional)
--- Hydraulic module (units with hydraulic module)
1
1
3
3
4
4
5
5
6
6
7
7
IN
OUT
←
←
8
8
2
2
6 - WATER CONNECTIONS

EN
EN - 9 EREBA ACCESS 17 - 40 T/HT
Make the plate heat exchanger hydraulic connections with the necessary
components, using material which will guarantee that the screwed joints
are leakproof.
The typical hydraulic circuit diagram shows a typical water circuit
installation in an air conditioning system.
ATTENTION: Use of units in an open loop is forbidden.
For an application with a water circuit, the following recommendations
must be taken into account:
1. The pump must be tted immediately before of the heat exchanger
and after the connection to the system return (unit without hydraulic
module).
2. It is advisable to install shut-o valves to allow isolation of the most
important circuit components, as well as the heat exchanger itself.
These valves (ball, globe or butterfly valves) should produce a
minimum loss of charge when they are open.
3. Provide unit and system drains and vents at the lowest system point.
4. Install purges in the higher sections of the installation.
5. Pressure ports and pressure gauges should be installed upstream and
downstream of the water pump.
6. Thermometers should be installed in the unit water inlet and outlet.
7. All piping must be adequately insulated and supported.
Installation of the following components is obligatory:
1. The presence of particles in the water can lead to obstructions in the
heat exchanger.
It is therefore necessary to protect the heat exchanger inlet with an
extractablemeshlter.Theltermeshgaugemustbeatleast10mesh/cm2.
The equipment standard version with hydraulic module is equipped
with mesh lter, included in the supply and installed.
2. After assembling the system, or repairing the circuit, the whole system
must be thoroughly cleaned with special attention paid to the state
of the lters.
3. Pump flow rate control is made through a flow control valve
supplied with the unit with hydraulic module, which must be
installed on the delivery pipe during installation.
4. When water has to reach temperatures below 5°C, or the
equipment is installed in areas subject to temperatures below
0°C, it is necessary to mix water with glycol in suitable quantity.
The maximum amount of ethylene glycol allowed is 30%.
Frost protection
Frost protection of the plate heat exchanger and of the circuit inside the
hydraulic module is always guaranteed down to -10°C by the electric
heaters that are automatically activated if needed. The power supply
to the electric heaters of the plate heat exchanger and to the internal
circuit of the hydraulic module must never be interrupted.
IMPORTANT: Filling, completing and draining the water circuit
charge must be done by qualied personnel, using the air purges
and materials that are suitable for the products.
Before any start-up verify that the heat exchange uid is
compatible with the materials and the water circuit coating.
Typical diagram of hydraulic circuit with hydraulic module 26-40kw
10
11
12
15
16
17
17
18
23
18
19
20
20
21
22
24
24
25 26
15
--- Hydraulic module (units with hydraulic module)
LEGEND
Hydraulic COMPONENTS
1 Mesh lter
2 Expansion tank
3 Relief valve
4 High pressure pump
5 Breather
6 Water drain valve
7 Flow sensor
8 Leaving temperature sensor from refrigerant - water exchanger
9 Entering temperature sensor from refrigerant - water exchanger
10 Plate heat exchanger
11 Anti-freeze electric heater for refrigerant - water exchanger
12 Anti-freeze electric heater for pipes
SYSTEM COMPONENTS
15 Pocket for temperature sensor
16 Breather
17 Flexible connections
18 On/O valve
19 Mesh lter (compulsory if the unit is not equipped with hydraulic module)
20 Pressure gauge
21 Water ow control valve (factory supplied but to be installed on site)
22 Charge valve
23 Bypass valve for anti-freeze protection (when, in winter, on/o valves
are closed)
24 Pressure sensor
25 Water drain valve from the plant
26 Water drain valve from refrigerant-water exchanger

EREBA ACCESS 17 - 40 T/HT EN - 10
CIAT recommendations on heat exchange uids:
• No NH4+ ammonium ions in the water, they are very detrimental for
copper. This is one of the most important factors for the operating life
of copper piping. A content of several tenths of mg/l will badly corrode
the copper over time (the plate heat exchangers used for these units
have brazed copper joints).
• Cl- Chloride ions are detrimental for copper with a risk of perforations
by corrosion by puncture. If possible keep below 10 mg/l.
• SO42- sulphate ions can cause perforating corrosion, if their content is
above 30 mg/l.
• No uoride ions (<0.1 mg/l).
• No Fe2+ and Fe3+ ions with non negligible levels of dissolved oxygen
must be present. Dissolved iron < 5 mg/l with dissolved oxygen < 5
mg/l.
• Dissolved silica: silica is an acid element of water and can also lead to
corrosion risks. Content < 1mg/l. Water hardness: > 0.5 mmol/l. Values
between 1 and 2.5 can be recommended. This will facilitate scale
deposit that can limit corrosion of copper. Values that are too high can
cause piping blockage over time. A total alkalimetric titre (TAC) below
100 is desirable.
• Dissolved oxygen: Any sudden change in water oxygenation conditions
must be avoided. It is as detrimental to deoxygenate the water by
mixing it with inert gas as it is to over-oxygenate it by mixing it with pure
oxygen. The disturbance of the oxygenation conditions encourages
destabilisation of copper hydroxides and enlargement of particles.
• Electric conductivity 600µS/cm
• pH: Ideal case pH neutral at 20-25°C - 7 < pH < 8
Do not introduce any signicant static or dynamic pressure into the
heat exchange circuit (with regard to the design operating pressures).
An hydraulic connector is available inside the unit for sizes 17-21 kW. A
picture of this part is shown here below. The aims of this part is to have
the same dimensions between water outlet and water inlet.
Outlet available static pressure of the unit with hydraulic module
Data applicable for pure water at 20°C
Data applicable for:
- Fresh water 20 °C
- In case of use of the glycol, the maximum water ow is reduced.
Available static pressure, kPa
Water ow rate, l/s
Legend
1. EREBA ACCESS 17 T/HT
2. EREBA ACCESS 21 T/HT
3. EREBA ACCESS 26 T
4. EREBA ACCESS 33T / 26 HT
5. EREBA ACCESS 33 HT
6. EREBA ACCESS 40 T/HT
50
60
70
80
90
100
110
120
130
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
0.0 0.5 1.0 1.5 2.0 2.5
4
2
3
6
5
1

EN
EN - 11 EREBA ACCESS 17 - 40 T/HT
Electrical connections
CAUTION:
To prevent electrical shock or equipment damage, make sure disconnects
are open before electrical connections are made.
Power supply cable size and external connection must be made by
the installer according to the unit installation characteristics and the
applicable standards. The power supply and earth multicore cable of
the device has to be connected to the general disconnector by routing
the cable through the grommet installed in the device, after removing
the access panel/s. The maximum section allowable for exible copper
cable is 25 mm2. Before connection, check that phase sequence
L1 – L2 – L3 is correct. The table below should be considered as a
reference and does not involve CIAT responsibility.
Unit
EREBA
ACCESS 17
T/HT
EREBA
ACCESS 21
T/HT021
EREBA
ACCESS 26
T/HT
EREBA
ACCESS 33
T/HT
EREBA
ACCESS 40
T/HT
Cable section 5 x2.5 mm² 5 x4 mm² 1x16 mm²
Power supply
cable H07 RN-F
Fuse (type "gG") 25 A 32A 40 A 50 A 63A
Take special care when making the earth connection.
The maximum permitted voltage and current imbalance is 10% of the
values indicated in Table II.
Contact your local power company for correction of an incorrect line
voltage.
CAUTION:
Operation of the unit on improper line voltage constitutes abuse and is
not covered by the CIAT warranty.
IMPORTANT:
To ensure the correct unit power supply (cable entry, conductor cross
section, protection devices etc.), consult the electrical data table, the
wiring diagram supplied with the unit and the applicable standards
concerning the installation of air conditioning equipment.
Never operate a unit if the voltage imbalance exceeds 2%.
The following formula must be used to determine the percentage of
voltage imbalance.
Voltage imbalance (%) =
Largest deviation from average voltage x 100
———————————————————————————-
Average voltage
Example:
Supply voltage: 400-3-50
AB = 404 V
BC = 399 V
AC = 394 V
Average voltage = 404 + 399 + 394 = 399 ≈ 400 V
3
Determine maximum deviation from average voltage:
AB = 404 - 400 = 4
BC = 400 - 399 = 1
AC = 400 - 394 = 6
Largest deviation is 6 volts. Percentage voltage imbalance is therefore:
6 x 100 = 1.5 %
400
CAUTION:
The installer must install protection devices, as required by the
applicable legislation.
For sizes 17-21 kW, the power supply cable must be routed through the
grommet of the electric control panel.To connect the power supply cable to
the main disconnector remove the metal protection box (by removing the
two xing screws). After completing all connections, re-install the protection
box by xing the two screws which were previously removed.
The liquid level gauge can be checked by removing the plug from the
side panel (there is no need to remove the whole panel).
The protection level of all the control boxes is IPX4.
Liquid refrigerant charge
Checking the charge
Important information regarding the refrigerant used:
This product contains uorinated greenhouse gas covered by the Kyoto
protocol.
Fluid type: R410A
Global Warming Potential (GWP): 2088
CAUTION:
1. Any intervention on the refrigerant circuit of this product should be
performed in accordance with the applicable legislation. In the EU, the
regulation is called F-Gas, N°517/2014.
2. Ensure that the refrigerant is never released to the atmosphere during
installation, maintenance or equipment disposal.
3. The deliberate gas release into the atmosphere is not allowed.
4. If a refrigerant leak is detected, ensure that it is stopped and repaired
as quickly as possible.
5. Only a qualied and certied personnel can perform installation
operations, maintenance, refrigerant circuit leak test as well as the
equipment disposal and the refrigerant recovering.
6. The gas recovery for recycling, regeneration or destruction is at
customer charge.
7. Periodic leak tests have to be carried out by the customer or by third
parties. The EU regulation set the periodicity here after:
System WITHOUT
leakage detection No Check 12 Months 6 Months 3 Months
System WITH leakage
detection No Check 24 Months 12 Months 6 Months
Refrigerant charge/
circuit (CO2
equivalent)
< 5 Tons 5 ≤ Charge
< 50 Tons
50 ≤
Charge <
500 Tons
Charge >
500
Tons(1)
Refrigerant charge/ Circuit (kg)
R134A
(GWP 1430)
Charge <
3.5 kg
3.5 ≤
Charge <
34.9 kg
34.9 ≤
Charge <
349.7 kg
Charge >
349.7 kg
R407C
(GWP 1774)
Charge <
2.8 kg
2.8 ≤
Charge <
28.2 kg
28.2 ≤
Charge <
281.9 kg
Charge >
281.9 kg
R410A
(GWP 2088)
Charge <
2.4 kg
2.4 ≤
Charge <
23.9 kg
23.9 ≤
Charge <
239.5 kg
Charge >
239.5 kg
HFO’s:
R1234ze No requirement
(1) From 01/01/2017, units must be equipped with a leakage detection system
8. A logbook must be established for equipments subject to periodic
leak tests. It should contain the quantity and the type of uid present
within the installation (added and recovered), the quantity of recycled
uid, regenerated or destroyed, the date and output of the leak test, the
designation of the operator and its belonging company, etc.
9. Contact your local dealer or installer if you have any questions.
CAUTION:
Accidental exhaust of refrigerant, whether due to a small leak or to a
large discharge from a piping rupture, can cause frostbites and burns
to the exposed person. Never neglect such injures. The installers,
owners and especially the repairers for small outdoor units, must:
- set a procedure to consult medical experts prior to treat such
injuries,
- provide rst aid equipments, especially for rapid treatment of eye
injuries.
We recommend them to apply the EN 378-3 Annex 3.
When adjusting the refrigerant charge, always ensure that water
is circulating in the heat exchanger to prevent any possibility of
freezing up. Damage caused by freezing is not covered by the
product warranty.
EREBA ACCESS T/HT units are shipped with a full operating charge of
refrigerant. Refer to Table I.
If it is nevertheless necessary to add more refrigerant, run the unit for some
time in cooling mode and then slowly add liquid refrigerant into the suction
side until there are no bubbles in the sight glass.
Motor
7 - ELECTRICAL CONNECTIONS AND REFRIGERANT CHARGE

EREBA ACCESS 17 - 40 T/HT EN - 12
EREBA ACCESS T/HT units use a R-410A refrigerant charge. For
your information, we are reproducing here some extracts from the
official publication dealing with the design, installation, operation
and maintenance of air conditioning and refrigeration systems and
the training of people involved in these activities, agreed by the air
conditioning and refrigeration industry.
Refrigerant guidelines
Refrigeration installations must be inspected and maintained regularly
and rigorously by specialists. Their activities must be overseen and
checked by properly trained people.
To minimise discharge to the atmosphere, refrigerants and lubricating
oil must be transferred using methods which reduce leaks and losses
to a minimum.
If an oil draining or recovery operation becomes necessary, the uid
transfer must be made using mobile containers.
• Leaks must be repaired immediately.
• Service valves tted to the ow and return lines permit charge transfer
to a suitably arranged external container.
• It is indispensable to use a dedicated transfer station.
• Compressor lubricating oil contains refrigerant. Any oil drained from
a system during maintenance must therefore be handled and stored
accordingly.
• Refrigerant under pressure must never be discharged to the
atmosphere.
Recharging liquid refrigerant
R-410A refrigerant operates at 50%-70% higher pressures than R-22.
Be sure that servicing equipment and replacement components are
designed to operate with R-410A.
The cylinders that contain R-410A are pink.
The cylinders that contain R-410A are provided with a dip tube that
allows uid to escape from the cylinder both when in upright position
and when turned upside down.
Unit R-410A should be charged with liquid refrigerant. Apply a common
ow regulator available on the market to the hose pipe to vaporize the
liquid refrigerant before it enters the unit.
R-410A, like other HFCs, is only compatible with the oils selected by the
manufacturer of compressors(POE).
NOTE:
Regularly carry out leak checks and immediately repair any leak found.

EN
EN - 13 EREBA ACCESS 17 - 40 T/HT
Undercharge
If there is not enough refrigerant in the system, this is indicated by gas
bubbles in the moisture sight glass.
There are two possibilities:
• Small undercharge (bubbles in the sight glass, no signicant change
in suction pressure).
- After detection and repair the unit can be recharged.
- The replenishment of the charge must always be done in the cooling
mode, slowly introducing liquid refrigerant at the suction side, until
there are no bubbles in the sight glass.
• Signicant undercharge (large bubbles in the sight glass, signicant
drop in suction pressure). In this case:
- Completely drain the refrigerant charge, using a refrigerant recovery
unit. After detection and repair check the charge with the unit o,
drain the system and recharge the full amount of liquid refrigerant
(see Table I) on the suction and discharge side.
- The refrigerant container used must contain a minimum of 10% of
its initial charge.
CAUTION:
If brazing is to be done, the refrigerant circuit must be lled with nitrogen.
Combustion of refrigerant produces toxic phosgene gas.
Change the refrigerant after an equipment failure, following a procedure
such as the one described in NF E29-795 or carry out a refrigerant analysis
in a specialist laboratory.
IMPORTANT:
Never use the compressor as a vacuum pump.
Always add refrigerant via the suction line.
Refrigerant must be added very slowly.
Do not overcharge the system with refrigerant.
If the refrigerant circuit remains open for longer than a day after an
intervention (such as a component replacement), the openings must be
plugged and the circuit must be charged with nitrogen (inertia principle).
The objective is to prevent penetration of atmospheric humidity and
the resulting corrosion on the internal walls and on non-protected steel
surfaces.
Electronic control
Operation and control of all units is carried out via the electronic control.
The instructions supplied with the control include comprehensive
descriptions.
After use, check the user interface is properly inserted into its housing
and the cover is closed by means of the screw supplied. This way, the
electronic control and the unit are protected against any impacts and
atmospheric agents.
PRO-Dialog + electronic control
PRO-DIALOG + is an advanced numeric control system that combines
complex intelligence with great operating simplicity.
PRO-DIALOG + constantly monitors all machine parameters and safety
devices, and precisely manages the operation of compressor and fans
for optimum energy eciency.
It also controls the operation of the water pump.
A powerful control system
The PID control algorithm with permanent compensation for the
difference between entering and leaving water temperature and
anticipation of load variations regulates compressor operation for
intelligent leaving water temperature control.
To optimise power absorption, the PRO-DIALOG + automatically re-
calibrates the set point of the entering water temperature based on
the outside air temperature to one of the two pre-set values (occupied
building and of an unoccupied building for example).
PRO-DIALOG + control is auto-adaptive for full compressor protection.
The system permanently optimises compressor run times according to
the application characteristics (water loop inertia), preventing excessive
cycling. In most comfort air conditioning applications this feature makes
a buer tank unnecessary.
Clear and easy-to-use control system
The operator interface is clear and user-friendly: two LEDs and digital
displays allow the immediate control of the device operating data.
The menus oer direct access to all machine controls, including a history
of possible faults, for rapid and complete chiller fault diagnosis.
Extended communications capabilities
PRO-DIALOG + allows remote control and monitoring of the unit through
a wired connection: 7-8 x 0.5 mm² multiple cables. The cable should be
screened of the FROH2R or BELTEN 9842 type.
The screening should be grounded only on the electric unit panel board.
Functions available are start/stop, cooling/heating mode selection (only
EREBA ACCESS HT unit), power demand limit or dual set-point and
customer safety lock.
The system permits remote signalling of any general anomaly for each
refrigerant circuit.
Three independent time schedules permit denition of: chiller start/stop,
operation at the second set-point (e.g. unoccupied mode), and operation
at low fan speed (e.g. during the night).
This option also permits cascade operation of two units and remote
control via communication bus (RS 485 serial port).
8 - REFRIGERANT CHARGE AND ELECTRONIC CONTROL

EREBA ACCESS 17 - 40 T/HT EN - 14
Start-up
Unit start-up is done by the electronic control described above, and
must always be carried out under the supervision of a qualied air
conditioning engineer.
This appliance is not intended for use by persons (including children) with
reduced physical, sensory or mental capabilities, or lack of experience
and knowledge, unless they have been given supervision or instruction
concerning the use of the appliance by a person responsible for their
safety.
Children should be supervised to ensure that they do not play with the
appliance.
Necessary checks/precautions before start-up
- Ensure that all electrical connections are properly tightened.
- Ensure that the unit is level and well-supported.
- Check that the hydraulic circuit has sucient water ow and that the
pipe connections correspond to the installation diagram.
- Ensure that there are no water losses. Check the correct operation of
the valves installed.
- All panels should be tted and rmly secured with the corresponding
screws.
- Make sure that there is sucient space for servicing and maintenance
purposes.
- Ensure that there are no refrigerant leaks.
- Conrm that the electrical power source agrees with the unit nameplate
rating, wiring diagram and other documentation for the unit.
- Ensure that the power supply corresponds to the applicable standards.
- Make sure that compressors oat freely on the mounting springs.
Compressor replacement
As the compressors are hermetic, when an internal fault occurs, the
compressor must be replaced.
For sizes 26 to 40, access to the oil level gauge is possible by removing
the 6 screws of the electric box.
This must be done as detailed below:
- Disconnect the unit from the electrical supply.
- Remove the access panels.
- Remove the gas from the refrigerant circuit using recovery equipment
to avoid harming the atmosphere.
- Electrically disconnect the compressor.
- Unbraze or unscrew the suction and discharge lines, taking care not to
damage the rest of the components.
- Remove the compressor fastenings.
- Replace the compressor, ensuring that it contains sucient oil.
- Braze or screw in the lines.
- Connect the compressor according to the wiring diagram.
- Evacuate the compressor.
- Introduce the quantity of refrigerant indicated on the nameplate
through the service couplings located on the high and low pressure
side.
NOTE:
This operation must be carried out by a qualied person.
Screws to be removed
Shift the electric box to allow access to the oil level gauge.
9 - START-UP, COMPRESSOR REPLACEMENT

EN
EN - 15 EREBA ACCESS 17 - 40 T/HT
Safety considerations related to protection
devices
Safety accessories(1) Over pressure protec- tion in case of an exter-
nal re(2)
Refrigerant Side
High pressure switch X
External relief valve(3) X
Rupture disk X
Fuse plug X
Heat transfert uid side
External relief valve (4) (4)
(1) Classied for protection in normal service situations.
(2) Classied for protection in abnormal service situations. These accessories are
sized for res with a thermal ow of 10kW/m². No combustible matter should
be placed within 6.5m of the unit.
(3) The instantaneous over-pressure limitation of 10% of the operating pressure
does not apply to this abnormal service situation.
The control pressure can be higher than the service pressure. In this case either
the design temperature or the high-pressure switch ensures that the service
pressure is not exceeded in normal service situations.
(4) The selection of these discharge valves must be made by the personnel
responsible for completing the hydraulic installation.
1
23
1 pipe union
2 screw
3 pipe union
Pump replacement
If the water pump needs to be replaced, proceed as follows:
- Disconnect the unit from the power supply.
- Open/remove the access panel/s
- Electrically disconnect the pump.
- Empty all water from the hydraulic module.
- Loosen the pipe unions 1 and 3.
- Remove the four pump xing screws 2.
- Replace the pump.
- Fit the pump xing screws 2.
- Tighten the pipe unions 1 and 3.
-Electrically connect the pump.
- Connect the unit to the power supply.
- Make sure the pump rotates in the right direction using the hole in
the back panel.
- Reinstall the lateral access panel.
Description of unit protection devices
The unit includes the following protection devices:
- Internal compressor protection.
- Fan motor internal thermal protection (unit sizes 26, 33 and 40kW).
- Main switch.
- Thermomagnetic control and heaters protection.
- Thermomagnetic fan protection (unit sizes 17, 21 and 40 kW).
- Defrost thermostat.
- Fault detector for the temperature and pressure sensors.
- High pressure switch: this protects the unit against excessive condensing
pressure.
The high pressure switch has factory-xed non-adjustable settings.
The appliance stops due to the intervention of the high pressure alarm
threshold, before the high pressure switch intervenes.
This function is performed by the electronic control device via a pressure
transducer.
- Low pressure switch:This function is performed by the electronic control
device via a pressure transducer.
Only on appliances with hydraulic module.
- Pump motor:
• external thermal protection (unit sizes 17 to 33 kW)
• thermomagnetic protection (only unit sizes 40 kW).Table III: Pressure
switch settings
Cut-out Reset
High pressure switch (017 to 033) 44 bar Manual
High pressure switch (040) 44.2 bar Automatic
CAUTION: Alteration of factory settings other than the design set-point,
without manufacturer's authorisation, may void the warranty
.
In case of use other than the manufacturer conguration, CIAT Service must
be asked
for permission to change the Pro-Dialog + system conguration.
Operating limits EREBA ACCESS T
These units have been designed to operate within the following limits:
Evaporator Minimum °C Maximum °C
Water entering temp. (at start-up) 7.8* 30
Water leaving temp. (in operation) 5** 18
Condenser
Air entering temperature -10 48
Operating limits EREBA ACCESS HT
Cooling cycle
Plate heat exchanger Minimum °C Maximum °C
Water entering temp. (at start-up) 7.8* 30
Water leaving temp. (in operation) 5** 18
Coil:
Air entering temperature -10 48
Heating cycle
Plate heat exchanger Minimum °C Maximum °C
Water entering temp. (at start-up) 10 45
Water leaving temp. (in operation) 20 50
Coil: Minimum °C Maximum °C
Plate heat exchanger -15*** 40
* Contact CIAT if an entering water temperature lower than 7.8 °C is necessary.
** For low-temperature applications, where the leaving water temperature is below
5°C, a frost protection solution must be used.
*** -13°C for units size 40kW.
10 - PUMP REPLACEMENT, UNIT PROTECTION DEVICES

EREBA ACCESS 17 - 40 T/HT EN - 16
Minimum and maximum water ow rates in the
plate heat exchangers
Minimum ow rate, l/s Maximum ow rate(1), l/s
EREBA ACCESS 17 T 0.40 1.39
EREBA ACCESS 17 HT 0.45 1.39
EREBA ACCESS 21 T 0.47 1.52
EREBA ACCESS 21 HT 0.57 1.52
EREBA ACCESS 26 T 0.63 1.96
EREBA ACCESS 26 HT 0.67 2.18
EREBA ACCESS 33 T 0.82 2.18
EREBA ACCESS 33 HT 0.87 2.29
EREBA ACCESS 40 T 0.99 2.60
EREBA ACCESS 40 HT 1.05 2.60
(1) Maximum water ow rate with an available static pressure of 50 kPa (units with
hydraulic module)
Water circuit water content
Whatever the size of the system, the minimum content of the water circuit
is given by the following formula:
Content = CAP(kW) x N = Litres
where CAP is the nominal system capacity (kW) at nominal operating
conditions of the installation.
Application N
Air conditioning 3.5
Industrial process cooling See note

EN
EN - 17 EREBA ACCESS 17 - 40 T/HT
The water content is necessary to ensure the stability of plant operation
and accurate temperature control.
It is often necessary to add a buer water tank to the circuit in order to
achieve the required volume.
NOTE:
For industrial process cooling applications, where high stability of
water temperature levels must be achieved, the values above must
be increased.
We recommend consulting the factory for these particular
applications.
Brine operation
For EREBA ACCESS HT units, it is possible to produce brine down to 0°C.
For EREBA ACCESS T units, it is possible to produce brine down to -8°C.
The unit is equipped with suction pipe insulation.
The operating range is a function of the suction pressure, which in turn
is a function of:
- the brine type,
- the brine concentration,
- the ow rate,
- the brine temperature,
- the condensing pressure (ambient temperature).
The evaporator low pressure and frost protection depends on the amount
of antifreeze added to the water circuit.The evaporator approach (LWT -
SST) as well as frost protection are based on this amount.
It is therefore essential to control the amount of antifreeze in the
water loop at the first start-up (circulate for 30 minutes to ensure
good homogeneity of the mixture before taking the sample). Refer to
the manufacturer’s data to dene the frost protection, based on the
concentration rate measured.
The frost protection temperature must be used in the unit software
parameters.
It is recommended that the commissioning of a brine system is done
by manufacturer.
For information: The protection values given by our supplier, based on
the antifreeze solutions used in our laboratory, are as follows: (these
values can change for dierent suppliers).
% by weight, glycol Freeze point, °C ethylene glycol
10 -3,8
15 -6,1
20 -8,8
25 -11,8
30 -15,2
Based on the table above, if the ethylene glycol concentration by weight
in the water loop is 30% the value of -15.2°C must be used in the software.
It is essential to carry out an annual check (minimum) of the amount of
glycol, and adjust the frost protection value in the software based on the
rate measured. This procedure must be systematic, if water or antifreeze
solution is added.
The curve below shows the minimum frost protection temperature that
must be observed, based on the leaving water temperature.
-20
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
-9 -7 -5 -3 -1 135
Minimum frost protecon temperature, °C
Evaporator leaving water temperature, °C
Minimumfrost protecon temperature
NOTES:
• For unit frost protection at low air temperature, the brine percentage
must be evaluated.
• The maximum glycol rate for units with hydraulic kit is 30 %.
• The maximum recommended temperature dierence is 5 K.
IMPORTANT: For glycol concentrations below 20% a corrosion inhibitor
suitable for the application must be used to avoid corrosion due to the
agressive nature of brine.
The presence of glycol reduces the life of the pump ttings.
It is recommended to change the ttings or the pump regularly.
To facilitate maintenance operations, it is recommended to install
shut-o valves upstream and downstream of the unit.
Maximum water content of hydraulic circuit
The units provided with hydraulic module are supplied with an expansion
vessel (in option) to limit the water content of the hydraulic circuit. The
table below shows the maximum content of water and a mix of water/
ethylene glycol of the hydraulic circuit.
EREBA ACCESS
T/HT 017 - 021 026 - 040
Static pressure bar 1.5 3 1.5 3
Water L200 50 350 140
GE 10% L150 38 263 105
GE 20% L110 28 193 77
GE 30% L90 23 158 63
GE: ethylene glycol
11 - UNIT PROTECTION DEVICES, OPERATING LIMITS AND OPERATING RANGE

EREBA ACCESS 17 - 40 T/HT EN - 18
Operating range - EREBA ACCESS T units
Notes:
Operating range with anti-freeze solution
-15
-5
5
15
25
35
45
55
-10 -8 -6 -4 -2 0 2 4 6 8 10 12 14 16 18 20
30
35
40
45
10
15
20
25
30
-10
-5
0
5
10
-20
-15
15 20 25 30 35 40 45 50 55
-12
-7
-2
3
8
13
18
23
28
33
38
43
48
53
-4 -2 0 2 4 6 8 10 12 14 16 18 20 22 24
Operating range - EREBA ACCESS HT units
Outdoor air temperature °C
Leaving water temperature °C
Outdoor air temperature °C
Leaving water temperature °C
Outdoor air temperature °C
Leaving water temperature °C
40kW only