Daikin MicroTech MT2300 - Waterside Economizer

17
OM 1364-1
WWW.DAIKINAPPLIED.COM
OPTIONAL fEATURES
Items Required
• Humidistat
• Return air sensor
Unit Control Settings
• I/O Expansion Module Jumper Settings:
— SW7 = ON (HGR Enabled)
— SW8 = OFF (WSE Disabled)
Operation
Upon a call for dehumidication, the unit will run in Cool Stage 2
compressor capacity and Dehumidication fan speed.
Example
A 2-compressor model SL, unit size 072, wired for
Dehumidication Only:
• Upon a call for dehumidication from the humidistat, HST
on the unit control board will be energized, allowing both
compressors to operate at full load and the fan to operate at
dehumidication CFM.
A 2-stage model SD, unit size 026, wired for Dehumidication
Only:
• Upon a call for dehumidication from the humidistat, HST
on the unit control board will be energized, allowing the
compressor to operate at full load and the fan to operate at
dehumidication CFM.
NOTICE
See Fan Performance section in catalog for unit size specic fan speeds.
Analog Humidity Sensor Input
• Any of the dehumidication options described can also be
used with an optional 0-10VDC relative humidity sensor.
• An analog humidity sensor is intended to be an option for
units with BACnet communications to allow the relative
humidity value to be viewed and the dehumidication
setpoint to be adjusted via network communications.
• When an analog humidity sensor is used, and optional
Humidity Senor Failure alarm can be congured to indicate
if the sensor reading has become unreliable. The Sensor
Failure Alarm feature is disabled by default, and can be
activated via network communications.
• While an analog humidity sensor can be used on units
without network communications, there will be no way to the
relative humidity or adjust the relative humidity setpoint, so
a humidistat is recommended.
Waterside Economizer
Application:
The MT2300 controls the waterside economizer. Upon a call
for economizer operation via TB1-3, HST on the MT2310 I/O
expansion board, for units without hot gas reheat or Y1 on the
MT2300 baseboard for units with hot gas reheat), the output
to the 3-way diverting valve and the fan motor are energized,
allowing water ow through the economizer coil and fan
operation.
Items Required
• Multi-stage thermostat or sensor
Unit Control Settings
• MT2310 I/O Expansion Module Jumper Settings:
— SW8 = ON (WSE Enable)