BCXC-SVX01A-EN
29
Operation
General
Information
Figure C-1. ZN010 Control Board
Figure C-2. ZN510 Control Board
Control Options
Blower coil air handlers are available
without controls or with one of four
different control options:
• Control interface
• Tracer ZN010
• Tracer ZN510
• Tracer ZN520
Units without controls have a junction box
mounted on the drive side for motor
power wire terminations. The controller is
easily accessible in the control box for
service. Control option descriptions follow
below.
Control interface
The control interface is for use with a
field–supplied low voltage thermostat. It
includes a control box with a transformer,
motor contactor, and disconnect switch.
All hot leads to the motor are
disconnected at the contactor and
disconnect switch to eliminate the risk of
shock during service. The end devices are
mounted with the wires pulled and
terminated inside the two–sided terminal
strip. All customer connections other than
power are on the outside of the two-sided
terminal strip.
Tracer
®
Controls
The Tracer family of controllers, ZN010;
ZN510; and ZN520, offer the combined
advantages of simple and dependable
operation with the latest Trane-designed
controller. Standard control features
include options normally available on
more elaborate control systems. All
control options are available factory-
configured or can be field-configured
using Rover
™
service software. For more
detailed information, refer to the Trane
publication number,
CNT-IOP-1 or CNT-
SVX04A-EN.
Tracer ZN010
Tracer ZN010 is a stand-alone
microprocessor controller.
Tracer ZN510 and ZN520
ZN510 can be used as either a stand-
alone or as part of a Trane Integrated
Comfort System (ICS).
In the stand-alone configuration, ZN510
or 520 receives operation commands
from the zone sensor and/or the auto
changeover sensor (on auto changeover
units). ZN520 also receives commands
from the discharge air sensor. The
entering water temperature is read from
the auto changeover sensor and deter-
mines if the unit is capable of cooling or
heating. The zone sensor module is
capable of transmitting the following
information to the controller:
• Timed override on/cancel request
• Zone setpoint
• Current zone temperature
• Fan mode selection (off-auto-high-low)
For optimal system performance, blower
coil units can operate as part of an
Integrated Comfort™ System (ICS)
building automation system controlled by
Tracer Summit
®
. The controller is linked
directly to the Summit control panel via a
twisted pair communication wire,
requiring no additional interface device
(i.e., a command unit). The Trane ICS
system can monitor or override ZN520
control points. This includes such points
as temperature and output positions.
Rover
™
Service Software
This windows-based software package
option allows field service personnel to
easily monitor, save, download, and
configure Tracer controllers through a
communication link from a portable
computer. When connected to the
communication link, Rover can view any
Tracer controller that is on the same
communication link.
Figure C-3. ZN520 Control Board
