Electrical Installation; Electrical Components; Electrical Connections - Trane CXAO Installation Operation & Maintenance

Electrical installation

Fouling factor correction factors
Fouling Factor
F.F.
[m^2°C*W]
0
1,80E-05
4,40E-05
8,80E-05
1,32E-04
1,72E-04
A factor Capacity correction factor
B factor Compressor power input correction factor
T min Minimum evaporator outlet water temperature increase
T max Maximum condenser outlet water temperature decrease
3 Electrical installation
General information
WARNING!
Only use copper conductors. Failure to use copper
conductors could result in overheating or corrosion at
connection points and could damage the unit.
To avoid interference, all control wires must be
connected separately from the power cables. Use
different electrical passage ducts for this purpose.
Before servicing the unit in any way, open the general
disconnecting switch on the unit's main power supply.
When the unit is off but the disconnecting switch is in
the closed position, unused circuits are live, as well.
Never open the terminal board box of the compressors
before having opened the unit's general disconnecting
switch. The units are equipped with electrical
components linear high power.
3.1

Electrical components

All power and interface electrical connections are
specifi ed in the wiring diagram that is shipped with the
unit.
The installer must supply the following components:
• Power supply cables (dedicated duct)
• Interconnection and interface cables (dedicated
duct)
• Thermal-magnetic circuit breaker of suitable size
(see electrical data).
30
Plant side cold heat exchanger
A1 B1
1,00 1,00
1,00 1,00
1,00 1,00
0,96 0,99
0,94 0,99
0,93 0,98
3.2
Power circuit:
Connect the power supply wires directly to the terminals
of the overall place in the framework of the unit. The
access panel must be drilled depending on the section of
the cable used and its gland. Can also be used a fl exible
pipe containing the three supply phases plus ground.
In every way to ensure total protection against the
possible penetration of water into the connection point.
Control circuit:
The control circuit is powered with 24V dcc. Each unit of
the series is provided with auxiliary transformer control
circuit 230/24V. It is not therefore requires no additional
power cable to the control equipment.
Only in the case where it is required the separate
optional storage tank is necessary to feed separately
antifreeze heater.
Electric heaters
The unit has an antifreeze heater installed directly
into the evaporator. Each circuit also has an electric
resistance installed in the compressor in order to keep
warm the oil and thus avoid the transmigration of the
refrigerant in its interior. Obviously the operation of the
electrical resistors is warranty only if this constant power
supply. If you can not leave the fed unit during over
winter, apply at least two of the procedures described in
section "Installation - Mechanics" in "Frost protection of
the evaporator and heat recovery exchangers. "
The protectors of the power supply system must take
into account the value of the above mentioned.
Plant side hot heat
exchanger
Tmin A2
0,00 1,00
0,00 1,00
0,00 0,99
0,70 0,98
1,00 0,96
1,50 0,95

Electrical connections

B2 Tmax
1,00 0,00
1,00 0,00
1,03 1,00
1,04 1,50
1,05 2,30
1,06 3,00
RF-SVX003A-GB