Microtech 2300 - Dehumidification; Simplified Dehumidification; Hot Gas Reheat Smart Dehumidification

DEHUMIDIFICATION
MICROTECH 2300 UNIT CONTROLLERDAIKIN APPLIED
26
Dehumidication
• Simplied Dehumidication
• Hot Gas Reheat Smart Dehumidication
• Humidistat Controlled Dehumidication
• Dehumidication Only
Simplied Dehumidication
Application
By utilizing a basic thermostat and conguring the MT2300 unit
controller for this mode of operation, the WSHP will provide
maximum latent capacity by optimizing blower fan speeds
resulting in decreased humidity levels in the conditioned space.
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)
Wiring
Figure 12: Unit thermostat simplied dehumidication wiring
diagram
R
Y2
C
G
Y1
Unit
HST
I/O Exp Board
R 24VAC
Cool Stage 2
Y2
Cool Stage 3Y3
Common
C
FanG
Cool Stage 1Y1
Thermostat
Figure 13: Unit thermostat simplied dehumidication wiring
diagram
R
C
G
Y1
Unit
HST
I/O Exp Board
R 24VAC
Cool Stage 2
Y2
Common
C
FanG
Cool Stage 1Y1
Thermostat
Operation
Unit will run at maximum compressor capacity with low CFM to
maximize latent capacity.
Example: A 2-stage unit size 026, 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)