Electrical Connections And Refrigerant Charge - CIAT EREBA ACCESS 017 T Manuel D'instructions

7 - ELECTRICAL CONNECTIONS AND REFRIGERANT CHARGE

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 flexible copper
2
cable is 25 mm . 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.
EREBA EREBA
Unit ACCESS 17 ACCESS 21
T/HT T/HT021
Cable section
5 x2.5 mm²
Power supply
cable
Fuse (type "gG") 25 A
32A
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 fixing screws). After completing all connections, re-install the protection
box by fixing 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.
EREBA EREBA EREBA
ACCESS 26 ACCESS 33 ACCESS 40
T/HT T/HT T/HT
1x16 mm²
5 x4 mm²
H07 RN-F
40 A 50 A 63A
Motor
EN - 11
Liquid refrigerant charge
Checking the charge
Important information regarding the refrigerant used:
This product contains fluorinated 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 qualified and certified 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
No Check 12 Months 6 Months
leakage detection
System WITH leakage
No Check 24 Months 12 Months 6 Months
detection
Refrigerant charge/
circuit (CO < 5 Tons
2
equivalent)
R134A Charge <
(GWP 1430) 3.5 kg
R407C Charge <
(GWP 1774) 2.8 kg
R410A Charge <
(GWP 2088) 2.4 kg
HFO's:
No requirement
R1234ze
(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 fluid present
within the installation (added and recovered), the quantity of recycled
fluid, 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 first 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.
3 Months
50 ≤ Charge >
5 ≤ Charge
Charge < 500
< 50 Tons
Tons(1)
500 Tons
3.5 ≤ 34.9 ≤
Charge >
Charge < Charge <
349.7 kg
34.9 kg 349.7 kg
2.8 ≤ 28.2 ≤
Charge >
Charge < Charge <
281.9 kg
28.2 kg 281.9 kg
2.4 ≤ 23.9 ≤
Charge >
Charge < Charge <
239.5 kg
23.9 kg 239.5 kg
EREBA ACCESS 17 - 40 T/HT
EN