Catalogue

WSHP-PRC020D-EN 53
Controls
and filter status, reversing valve coil, two-speed fan motor and water isolation valve support (for
variable speed pumping).
Note: Optional: condensate overflow
Tracer ZN510 functions include:
Building Control Advantages
TheTracer ZN510 controller has the ability to share information with one or several units on the
same communication link.This sharing of information is made possible via a twisted pair of wire
and a building automation system or throughTrane's Rover™ service tool.
An advantage of installing a ZN510 is its capability to work with other LonTalk™ certified
controllers.This provides greater flexibility to the building owner, as well as greater flexibility in
design.
Integrating the ZN510 on water-source equipment, and tying it to aTracer Summit system provides
a complete building management system. EachTracer Summit can connect to a maximum of 120
controllers. With the ICS system, theTracer can initiate an alarm on a loss of performance on
equipment malfunctions; allowing problems to be handled in a timely manner before
compromising comfort.
This type of application would most commonly be used for a large space(s) that may require more
than one unit. In addition to this application design, theTracer ZN510 controller provides a way for
units located within the same space to share the same zone sensor to prevent units from
simultaneously heating and cooling in the same space.
Compressor Operation
The compressor is cycled on and off to meet heating or cooling zone demands.The control of the
unit uses the units’ capacity and pulse width modulation (PWM) logic along with minimum on/off
timers to determine the compressor's operation.The compressor is controlled ON for longer
periods as capacity increases and shorter periods as capacity decreases.
Condensate Overflow
When condensate reaches the trip point, a condensate overflow signal generates a diagnostic
which disables the fan, unit water valves (if present), and compressor.The unit will remain in a
halted state until the condensation returns to a normal level. At this time, the switch in the drain
pan will automatically reset. However, the controller's condensate overflow diagnostic must be
manually reset to clear the diagnostic and restart the unit.
Data Sharing
TheTracer ZN510 controller is capable of sending or receiving data (setpoints, fan request, or space
temperature) to and from other controllers on the communication link.This allows multiple units
to share a common space temperature sensor in both stand-alone and building automation
applications.
Fan Operation
The supply air fan operates at the factory wired speed in the occupied or occupied standby mode.
When switch is set to AUTO, the fan is configured for cycling ON with heating or cooling. In heat
mode, the fan will run for 30 seconds beyond compressor shutdown in both occupied and
unoccupied mode.
Fan Run Timer
The controller's filter status is based on the unit fan's cumulative run hours.The controller
compares the fan run time against an adjustable fan run hours limit and recommends unit
maintenance as required.