Trane ZN510 Controller, Tracer manual Unit Operation, Communication

Unit Operation

General Information The ZN510 controller is a microprocessor-based direct digital controller that controls a variety of water source heat pump equipment including:

zStandard efficiency horizontal and vertical units up to 10 tons.

zHigh efficiency horizontal and vertical units.

zConsole water source heat pumps.

ZN510 is designed to provide accurate and reliable zone temperature control by using custom proportional integral (PI) algorithms. The controller is factory installed and configured to support:

zSingle fan speed.

zUp to two compressors.

zReversing valve.

z2-position outdoor air damper or generic binary output.

Peer-to-peer communication across controllers is possible even when a building automation system is not present. ZN510 is also adaptable as a standalone system.

Figure 2: Communication connections

Communication

The ZN510 controller communicates via Trane’s Comm5 protocol. Typically, a communication link is applied between unit controllers and a building automation system. Communication is also possible

with Trane’s service tool Rover™. ZN510 provides a total of six 1/4-inch quick-connect terminals for connection to the Comm5 communication link. These connections include:

zTwo terminals (TB2-1, TB2-2)

are provided for direct con- nection of Rover to the ZN510 Board or provided as spare ter- minals.

zTwo terminals (TB2-3, TB2-4) are connected to the field terminal strip (1TB1-14, 1TB1-16) for connection to the communication link (daisy chain).

zTwo terminals (TB2-5, TB2-6) are connected to the field terminal strip (1TB1-5, 1TB1-6) which should be connected to the zone sensor communication jack. This provides direct connect of Rover to the commu- nication link without having to connect directly to the ZN510 board or provided as spare ter- minals.

zThe field terminal strip 1TB1 provides screw terminations for all field connections.

TB2-1

TB2-2

TB2-3

TB2-4

TB2-5

TB2-6

COMM

Space

Communication

Connection

COMM COMM

1TB1-14 1TB1-16 1TB1-5 1TB1-6

20pole low voltage terminal strip screw connections for field hook-up

Communication Zone

LinkSensor

Figure 3: Communication Wiring

7