Electrical Connection; Power Supply; Voltage Phase Imbalance (%); Power Connection/Disconnect Switch - Carrier AquaForce PUREtec 61XWHLZE 03 Installation, Operation And Maintenance Manual

5 - ELECTRICAL CONNECTION

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

5.1 - Power supply

The power supply must conform to the specification on the unit
nameplate. The supply voltage must be within the range specified
in the electrical data table. For connection details refer to the wiring
diagrams.
WARNING: Operation of the unit 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 supplier at once and ensure that the unit
is not switched on until corrective measures have been taken.

5.2 - 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:
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.
(AB) = 406 - 400
(BC) = 400 - 399
(A) = 400 - 394
16
= 6
= 1
= 6
Motor

5.3 - Power connection/disconnect switch

Units connection points
61XWH 3 to 7: 1 per unit
61XWH 10 to 17: 1 for circuit A / 1 for circuit B

5.4 - 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 guideline, and does not
make in any way liable. After wire sizing has been completed,
using the certified dimensional 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 to the general disconnect/isolator switch are designed
for the number and type of wires, listed in the second column of the
table on the next page.
The calculations for favourable and unfavourable cases are based
on the maximum current for each unit (see electrical data tables).
The design uses the standardised installation methods in accordance
with IEC 60364: multiconductor PVC (70°C) or XLPE (90°C) insulated
cables with copper core; arrangement to comply with table 52c of
the above standard. The maximum temperature is 42°C. The given
maximum length is calculated to limit the voltage drop to 5%.