Outdoor Air Damper Operation; Reversing Valve Operation; Peer-To-Peer (Master/Slave) Data Sharing - Trane Tracer ZN511 Installation And Operation Manual

Chapter 5 Sequence of operations for the heat pump configuration
30

Outdoor air damper operation

The Tracer ZN511 supports a two-position outdoor air damper. The
damper is used as a source for ventilation air only, not as a cooling source
(economizer). In occupied and occupied standby mode, the damper is open
when the fan is on and closed when the fan is off. In occupied standby and
unoccupied mode, as well as during morning warm-up and morning cool-
down, the damper remains closed.

Reversing valve operation

The reversing valve is configurable to energize in either the cooling mode
(typical of Trane units) or the heating mode. Be sure to configure the
reversing valve operation based on the heat pump manufacturer's design.
An energized valve will remain energized until a mode change (either
from cooling to heating or vice versa) is initiated. The reversing-valve
operation is delayed after compressor shutdown to reduce noise due to
refrigerant migration. The reversing valve will de-energize when a power
failure occurs, or when the controller is set to off either through a commu-
nicated off signal or when the fan switch is set to OFF.
Peer-to-peer (master/slave) data
sharing
Tracer ZN511 zone controllers have the ability to share data with other
LonTalk-based controllers. Several controllers can be bound as peers,
using the Rover service tool, to share:
Set point
•
• Zone temperature
Heating/cooling mode
•
Fan status
•
Unit capacity control
•
Shared data is communicated from the controller assigned as master to
the other (slave) controllers. Applications having more than one unit serv-
ing one zone can benefit by using this feature, which prevents multiple
units from simultaneously heating and cooling.
CNT-SVX06B-EN