Microtech 2300 - Controls; MT2300 Controller with an Optional Bacnet; Communication Module

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OM 1364
WWW.DAIKINAPPLIED.COM
CONTROLS
Controls
MT2300 Controller with an Optional
BACnet® Communication Module
For installation and operation information on MT2300 unit
controller and other ancillary components, see:
• IM 955 - MicroTech III Wall Sensor For use with Microtech
III Unit Controller
• IM 1363 - MicroTech MT2300 Water Source Heat Pump
Unit Controller BACnet® MS/TP Network Integration
• ED 19129 - MicroTech MT2300 Water Source Heat Pump
Unit Controller BACnet® Protocol Information
Daikin water source heat pumps are available with an optional
BACnet MS/TP communication module that is designed to
communicate over a BACnet MS/TP communications network to
a building automation system (BAS). It can be factory or eld-
installed.
The unit controller is programmed and tested with all the logic
required to monitor and control the unit. An optional wall sensor
may be used with the communication module to provide limited
local control of the water source heat pump. The unit controller
monitors water and air temperatures and passes information to
the communication module. The module communicates with the
BAS, to provide network control of the water source heat pump.
The module makes operational data and commands available on
a communications network using BACnet objects and properties:
• The network cable is a shielded twisted-pair cable
• Network communications run up to 76.8 Kbps
• DIP switches on the controller enable the MS/TP MAC
address to be set in the range 0-127
• Four green status LEDs on the communication
module indicate communication activity on the MS/TP
communication network and with the unit controller
Figure 23: MT2300 BACnet MS/TP Snap-in Communication
Module
MT2300 Unit Controller with BACnet MS/
TP Communication Module orchestrates
the following unit operations
• Enable heating and cooling to maintain setpoint based on a
room sensor
• Enable fan and compressor operation
• Monitors all equipment protection controls
• Monitors room and discharge air temperatures
• Monitors leaving water temperature
• Relays status of all vital unit functions
The MT2300 unit controller with an
optional communication module includes
• Return Air Temperature sensor (RAT)(eld-installed)
• Discharge Air Temperature sensor (DAT)(eld-installed)
• Leaving Water Temperature sensor (LWT)
NOTICE
Refer to IM 956-X for details to install (RAT) & (DAT) sensors.
WARNING
When an optional wall-mounted room temperature sensor is connected to the
unit controller, the Return Air Temperature (RAT) sensor must not be installed.
A wall-mounted room temperature sensor and the return air temperature
sensor must not be connected simultaneously or the unit will not operate
properly.
The communication module provides access to setpoints for
operational control
Available wall sensors include:
• Room sensor with LED status and tenant override button
• Room sensor with LED status, tenant override button, and
±5°F setpoint adjustment
• Room sensor with LED status, tenant override button, 55°
to 95°F setpoint adjustment