Electrical Connections And Refrigerant Charge - Carrier 61AF Manuel D'installation

61 AF

Electrical connections and refrigerant charge

Electrical connections
WARNING:
To prevent electrical shock or equipment damage, make sure
disconnects are open before electrical connections are made. If this
action is not taken, personal injury may occur.
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
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 Carrier responsibility.
Min
Max
Wire
Lenght Wire Type
section
[m]
[mm2]
14-7 5 x 6 100 H07 RN - F
14-9 5 x 2,5 100 H07 RN - F
19-9 5 x 4 100 H07 RN - F
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.
IMPORTANT: For size 014, an external main switch must be
positioned next to the unit. On size 019, the main switch is already
included on the unit.
WARNING:
Operation of the unit on improper line voltage constitutes abuse and is
not covered by the Carrier 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)
Example:
Nominal supply: 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
Fuse Max
Max
(type Wire
Lenght Wire Type
gG) section
[m]
[A] [mm2]
63 5 x 10 210 H07 RN - F
25 5 x 4 210 H07 RN - F
32 5 x 6 210 H07 RN - F
Average voltage
Motor
CAUTION:
The installer must install protection devices, as required by the
applicable legislation.
For sizes 19 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.
Liquid refrigerant charge
Checking the charge
WARNING:
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
Fuse
product warranty.
(type gG)
[A]
61AF units are shipped with a full operating charge of refrigerant.
63
Refer to Table I.
61AF units use a R-407C refrigerant charge. For your information,
25
32
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
61 AF contains fluorinated greenhouse gas covered by the Kyoto
protocol. Refrigerant type: R-407C Global Warming Potential (GWP):
1653. 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
transfer to a suitably arranged external container.
a system during maintenance must therefore be handled and stored
accordingly.
atmosphere.
Unit R-407C should be charged with liquid refrigerant. Apply a common
flow regulator available on the market to the hose pipe to vaporize
the liquid refrigerant before it enters the unit. R-407C, 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.
WARNING:
If brazing is to be done, the refrigerant circuit must be filled with
nitrogen. Combustion of refrigerant produces toxic phosgene gas.
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.
E N G L I S H
GB - 9