Daikin MicroTech MT2300 - Dehumidification Only

OPTIONAL fEATURES
MICROTECH 2300 UNIT CONTROLLERDAIKIN APPLIED
16
Items Required
• Model SD, SN, ST, SL = 3 stage thermostat
• Model SC, SM, SS, SH, SR = 2 stage thermostat
• Return air sensor
NOTICE
This feature is not available if unit is controlled by a wall sensor.
Unit Control Settings
• MT2310 I/O Expansion Module Jumper Settings:
— SW7 = ON (HGR Enabled)
— SW8 = OFF (WSE Disable)
Operation
Unit will run at maximum compressor capacity with low CFM to
maximize latent capacity.
Example: A 2-stage unit size 028, wired for Simplied
Dehumidication:
• Upon a call for Y1, and the return air temperature is 68°F or
greater. TB1-3, HST on the MT2310 I/O expansion board
will be energized, allowing the compressor to operate at full
load and the fan to operate at 600 CFM.
• Upon a call for Y2, Y1 on the unit control board will be
energized, allowing the compressor to operate at part load
and the fan to operate at 700 CFM. (Factory default fan
speed setting 3)
• Upon a call for Y3, Y2 on the unit control board will be
energized, allowing the compressor to operate at full load
and the fan to operate at 800 CFM. (Factory default fan
speed setting 3)
Hot Gas Reheat Smart Dehumidication
Application
By utilizing the factory installed hot gas reheat and smart air ow
management; dehumidication can be achieved in applications
where precise humidity control is required.
Items Required
• Unit with Hot Gas Reheat option
• Humidistat and a Thermostat OR Digitally Adjustable Wall
Sensor
• Return air sensor
Unit Control Settings
• MT2310 I/O Expansion Module Jumper Settings:
— SW7= ON (HGR Enabled)
— SW8 = OFF (WSE Disabled)
Operation
A call for heating or cooling has a higher priority than a call for
dehumidication. Dehumidication is allowed only if the room
temperature is satised and the return air temperature is 68°F or
greater. If the controller detects the need for heating or cooling,
or if the Humidistat is no longer calling for dehumidication,
dehumidication mode will be suspended. Dehumidication
mode will enable the 3-way hot gas bypass valve, sending hot
superheated refrigerant to the hot gas reheat coil while running
the compressor at full load and the fan at dehumidication speed.
NOTICE
See Fan Performance section in catalog for unit size specic fan speeds.
Humidistat Controlled Dehumidication
Application
Similar to the simplied dehumidication option, this option also
maximizes latent capacity by using a humidistat and thermostat.
This option allows the room thermostat to control sensible
cooling, while the independent humidistat controls room humidity
levels
Items Required
• Humidistat combined with a...
• Model SD, SN, ST, SL = 3 stage thermostat
• Model SC, SM, SS, SH, SR = 2 stage thermostat
• Return air sensor
NOTE: This feature is not available if unit is controlled by wall
sensor
Unit Control Settings
• MT2310 I/O Expansion Module Jumper Settings:
— SW7 = ON (HGR Enabled)
— SW8 = OFF (WSE Disabled)
Operation
• A call for heating or cooling has a higher priority than a call
for dehumidication. Dehumidication is allowed only if the
room temperature is satised and the return air temperature
is 68°F or greater.
• If the controller detects the need for heating or cooling, or
if the Humidistat is no longer calling for dehumidication,
dehumidication mode will be suspended.
• Dehumidication mode will enable the 3-way hot gas
bypass valve, sending hot superheated refrigerant to the
hot gas reheat coil while running the compressor at full load
and the fan at dehumidication speed.
NOTICE
See Fan Performance section in catalog for unit size specic fan speeds.
Dehumidication Only
Application
In applications where only dehumidication is needed, the
humidistat can be wired to HST on the MT2300 unit controller,
allowing the WSHP unit to operate in dehumidication mode only.
The unit will only respond to a call for dehumidication whenever
the return air temperature is 68°F or greater.