Power Supply; General Information; Chopper Wiring - Honeywell Unitary Installation Instructions Manual

POWER SUPPLY

General Information

To prevent a risk of injury due to electrical shock and/or
damage to the device due to short-circuiting, low
voltage and high-voltage lines must be kept physically
separate. To prevent a risk of short-circuiting and
damage to your Honeywell Unitary controllers, do not
reverse the polarity of the power connection cables and
avoid ground loops (connecting one field device to
several controllers).
Before wiring the controller, determine the input and
output device requirements for each controller used in
the system. Select input and output devices compatible
with the controller and the application. Consider the
operating range, wiring requirements, and
environmental conditions while selecting input and
output devices.
Determine the location of controllers, sensors,
actuators, other input and output devices, and create
wiring diagrams for illustrations of typical controller
wiring for various configurations.
The application engineer must review the control job
requirements. This includes the sequences of operation
for the controller and the system as a whole. Usually,
some variables must be passed between the controllers
that are required for optimum system-wide operation.
Typical examples are the TOD, occupied, unoccupied,
outdoor air temperature, and demand limit control
signal. Understanding these interrelationships early in
the job engineering process is vital for proper
implementation while configuring the controllers.
NOTE:
All wiring must comply with applicable electrical
codes and ordinances. Refer to the job or
manufacturers' drawings for details. Local wiring
guidelines (for example, IEC 364-6-61 or VDE
0100) may take precedence over
recommendations provide in these installation
instructions.
To comply with CE requirements, devices having a
voltage of 50-1000 VAC or 75-1500 VDC, but
lacking a supply cord, plug, or other means for
disconnecting from the power supply must have
the means of disconnect incorporated in the fixed
wiring. This type of disconnect must have a
contact separation of at least 1/8 in. (3 mm) at all
poles.
HONEYWELL UNITARY CONTROLLER - 230 VAC - INSTALLATION INSTRUCTIONS

Chopper Wiring

All wiring must comply with applicable electrical codes
and ordinances, or as specified on installation wiring
diagrams. Controller wiring is terminated to the screw
terminal blocks located on the device.
NOTE:
The 230 VAC power supply must include a
dedicated 3 A fuse or a circuit breaker in
conjunction with a switch as a disconnecting
safety device for the controller.
13 31-00610-01