Fan Operation; Fan Off Delay; Peer-To-Peer Data Sharing - Trane Tracer MP501 Installation, Operation And Maintenance Manual

Sequence of Operations/SCC Mode
Figure 8.

Fan Operation

The fan is configurable for continuous or cycling operation for both heating and cooling mode. If
configured for continuous operation, the fan runs continuously during the occupied, occupied
standby, and occupied bypass modes. If configured for cycling operation, the fan cycles if the
temperature is away from setpoint during the occupied, occupied standby, and occupied bypass
modes. During the unoccupied mode, the fan cycles regardless of the fan configuration.

Fan Off Delay

After the actuator output has been controlled to its disabled position, the MP501 automatically
keeps the fan energized for an additional time (configurable). The purpose of this feature is to
remove residual heating or cooling from the source.

Peer-to-peer Data Sharing

The MP501 has the ability to share data with other LonTalk-based controllers. Several controllers
can be bound as peers, using the Rover service tool, to share data such as:
•
•
•
Shared data is communicated from one controller to others. Applications having more than one
unit serving the same zone can benefit by using this feature. For example, peer-to-peer data sharing
allows multiple controllers to share a single zone temperature sensor and prevents multiple units
from simultaneously heating and cooling.
22
Make-and-break limits in 2-stage mode
O
u
Active
t
Stage 2
p
u
Inactive
t
Active
S
Stage 1
t
a
Inactive
t
e
Setpoint
Zone temperature
Heating/cooling mode
Make
Limit 1
30%
Break Break
Limit 1 Limit 2
5% 45%
Actuator Command (Percent)
Make
Limit 2
70%
CNT-SVX08F-EN