Trane CVGF-SVU02B-E4 Operation And Maintenance Manual page 58

Electrical Sequence
This section will acquaint the
operator with the control logic
governing chillers equipped with
Tracer CH530 control systems.
Note: The typical wiring
diagrams are representative of
standard units and are provided
only for general reference. They
may not reflect the actual wiring
of your unit. For specific
electrical schematic and
connection information, always
refer to the wiring diagrams that
shipped with the chiller.
58
Control System
Components
With the supply power
disconnect switch or circuit
breaker (2Q1 or 2K3) on, 115-volt
control power transformer 2T5
and a 15-amp starter panel fuse
(2F4 ) to terminal (2X1-1) starter
panel to terminal 1X1-1 in the
control panel. From this point,
control voltage flows to:
1. Circuit Breaker 1Q1 which
provides power to the starter
module (2A1) relay outputs
and the High Pressure Cutout
switch (4S1).
2. Circuit Breaker 1Q3 which
provides power to
Transformer (1T1) which steps
down the 115 Vac to 24 Vac.
This 24 Vac then powers the
24 Vdc power supply 1A1, and
1A2 if present. The 24 Vdc is
then connected to all modules
using the IPC Bus providing
module power. 1Q3 also
provides power to the
external chiller water proof of
flow device connected
between terminal block
1X1-5 to 1A6-J3-2, and
condenser water proof of flow
device connected at 1X1-6 to
1A6-J2-2.
3. The DynaView ™ display
module 1A22, receives 24 Vdc
power from the IPC bus.
CVGF-SVU02B-E4