Electrical Connections - Carrier AQUASNAP 30RB series Installation, Operation And Maintenance Instructions

30RB/30RQ - 30RBY/30RQY
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
cable is 25 mm 2 . 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.
30RB/30RQ 30RB/30RQ
Unit
017 021
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 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
———————————————————————————-
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).
GB - 16
30RB/30RQ 30RB/30RQ 30RB/30RQ
026 033 040
5 x4 mm² 1x16 mm²
H07 RN-F
40 A 50 A 63A
Motor
The protection level of all the control boxes is IPX4.
Liquid refrigerant charge
Checking the charge
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.
30RB-RQ 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.
30RB-RQ 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 fluid
transfer must be made using mobile containers.
• Leaks must be repaired immediately.
• S ervice valves fitted to the flow and return lines permit charge transfer
to a suitably arranged external container.
• It is indispensable to use a dedicated transfer station.
• C ompressor lubricating oil contains refrigerant. Any oil drained from
a system during maintenance must therefore be handled and stored
accordingly.
• R efrigerant 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 fluid 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
flow 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.