Electrical Connection; Control Box; Power Supply; Voltage Phase Imbalance (%) - Carrier AquaSnap Touch Pilot Junior Series Installation, Operation And Maintenance Instructions

11 - ELECTRICAL CONNECTION

11.1 - Control box

Please refer to the certified dimensional drawings, supplied with
the unit.

11.2 - Power supply

The power supply must conform to the specification on the heat
pump nameplate. The supply voltage must be within the range
specified in the electrical data table. For connec-tions refer to the
wiring diagrams and the certified dimen-sional drawings.
WARNING: Operation of the heat pump with an improper
supply voltage or excessive phase imbalance constitutes
abuse which will invalidate the Carrier warranty. If the phase
imbalance exceeds 2% for voltage, or 10% for current, contact
your local electricity supply at once and ensure that the heat
pump is not switched on until correc-tive measures have been
taken.

11.3 - Voltage phase imbalance (%)

100 x max. deviation from average voltage
Average voltage
Example:
On a 400 V - 3 ph - 50 Hz supply, the individual phase voltages
were measured to be:
AB = 406 V; BC = 399 V; AC = 394 V
Average voltage = (406 + 399 + 394)/3 = 1199/3
= 399.7 say 400 V
Calculate the maximum deviation from the 400 V average:
(AB) = 406 - 400 = 6
(BC) = 400 - 399 = 1
(CA) = 400 - 394 = 6
Standard (without
disconnect switch)
30RQS/
Max. connection capacity
RQSY
Section, mm²
039
1 x 95
045 1 x 95
050 1 x 95
060 1 x 95
070 1 x 95
078 1 x 95
080 1 x 95
090 1 x 95
100 1 x 95
120
1 x 95
140 1 x 185
160 1 x 185
Note: Power supply cable section (see the wiring diagrams supplied with the unit)
32
Motor
Minimum and maximum connectable wire sections (per phase) for 30RQS units
With disconnect
switch (option 70)
Section, mm²
1 x 95
1 x 95
1 x 95
1 x 95
1 x 95
1 x 95
1 x 95
1 x 95
1 x 95
1 x 95
1 x 185
1 x 185
The maximum deviation from the average is 6 V. The greatest
percentage deviation is: 100 x 6/400 = 1.5%
This is less than the permissible 2% and is therefore acceptable.

11.4 - Recommended wire sections

Wire sizing is the responsibility of the installer, and depends on
the characteristics and regulations applicable to each installation
site. The following is only to be used as a guide-line, and does not
make Carrier in any way liable. After wire sizing has been
completed, using the certified dimen-sional drawing, the installer
must ensure easy connection and define any modifications
necessary on site.
The connections provided as standard for the field-supplied power
entry cables are designed for the number and type of wires, listed
in the table below.
The calculations are based on the maximum machine cur-rent
(see electrical data tables), and standard installation practises, in
accordance with IEC 60364, table 52C have been applied (30RQS
units are installed outside):
• No. 17: suspended aerial lines,
• No. 61: buried conduit with a derating coefficient of 20.
The calculation is based on PVC or XLPE insulated cables with
copper core. A maximum ambient temperature of 46°C has been
taken into consideration. The given wire length limits the voltage
drop to < 5% (length L in metres - see table below).
IMPORTANT: Before connection of the main power cables
(L1 - L2 - L3) on the terminal block, it is impera-tive to check
the correct order of the 3 phases before pro-ceeding to the
connection.
Power cable entry
The power cables can enter the control box from below or from
the side of the unit, at the bottom of the angle iron. Pre-punched
holes facilitate the entry. Refer to the certified dimensional drawing
for the unit. A removable aluminium plate below the control box
allows introduction of the cables.
Minimum calculated section
Section, Max. length,
Wire type
mm² m
1 x 16 165 XLPE Cu
1 x 16 165 XLPE Cu
1 x 16 165 XLPE Cu
1 x 25 210 XLPE Cu
1 x 35 220 XLPE Cu
1 x 35 220 XLPE Cu
1 x 35 220 XLPE Cu
1 x 35 220 XLPE Cu
1 x 70 280 XLPE Cu
1 x 70 280 XLPE Cu
1 x 95 305 XLPE Cu
1 x 120 320 XLPE Cu
Connectable wire
Maximum calculated section
Section, Max. length,
mm² m
1 x 25 300
1 x 25 300
1 x 25 300
1 x 35 305
1 x 50 350
1 x 70 380
1 x 70 380
1 x 70 380
1 x 95 410
1 x 95 410
1 x 185 465
1 x 185 465
Wire type
PVC Cu
PVC Cu
PVC Cu
PVC Cu
PVC Cu
PVC Cu
PVC Cu
PVC Cu
PVC Cu
PVC Cu
PVC Cu
PVC Cu