Daikin MicroTech III DPS User Manual

OM 1263 • MICROTECH UNIT CONTROLLER 28 www.DaikinApplied.com
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IRT (Heat Pump only) is a status only item which displays the
current indoor refrigerant temperature sensor reading.
ORT (Heat Pump only) is a status only item which displays the
current outdoor refrigerant temperature sensor reading.
SSH DB is an adjustable item that sets deadband around
the E󰀨 SSH Spt for superheat control of either the indoor
expansion valve (cooling operation) or outdoor expansion valve
(EVO).
SSH Lo Base is an adjustable item that sets a low limit for
the E󰀨SH Base value. This parameter is for test purposes and
should not generally be changed in the eld.
SSH Hi Base is an adjustable item that sets a high limit for
the E󰀨SH Base value. This parameter is for test purposes and
should not generally be changed in the eld.
Htg EVI Method (Heat Pump only) is an adjustable item
that sets the method of control of the indoor expansion valve
(EVI) during heating operation. If set to “STD” EVI is driven
continuously to 100% open during heating operation. If set to
subcooling “Sbc” then EVI is control to maintain the E󰀨 SC Spt
during heating operation.
IC SC Spt is an adjustable item that sets a base value for the
E󰀨 SC Spt during heating operation.
IC SC DB is an adjustable item that sets a deadband around
the E󰀨 SC Spt during heating operation.
HtgSC EVI Min= is an adjustable item which sets a minimum
indoor expansion valve position for steady-state sub cooling
reset control during heat pump heating operation.
Clg EVO Method (Heat Pump only) is an adjustable item that
sets the method of control of the outdoor expansion valve
(EVO) during cooling operation. If set to “STD” EVO is driven
continuously to 100% open during cooling operation. If set to
“Sbc” then EVO is control to maintain the E󰀨 SC Spt during
cooling operation.
OC SC Spt is an adjustable item that sets a base value for the
E󰀨 SC Spt during cooling operation.
OC SC DB is an adjustable item that sets a deadband around
the E󰀨 SC Spt during cooling operation.
ClgSC EVO Min= is an adjustable item which sets a minimum
outdoor expansion valve position for steady-state sub cooling
reset control during heat pump cooling operation.
ManCtrl EV Op is an adjustable item that sets the mode of
expansion valve control during Manual Control operation.
If set to “Auto” the expansion values are automatically
controlled during Manual Control operation. If set to “Man”
the expansion valves are manually controlled during Manual
Control operation.
Expansion Valve Control (EVI or EVO, EVO supplied only
on heat pumps)
The EVI valve is modulated use a PI Loop during cooling
operation to maintain the e󰀨ective suction superheat set point.
On heat pump units EVI is either driven to the 100% open
position or modulated to maintain the e󰀨ective subcooling set
point during heating operation.
The EVO valve is modulated use a PI Loop during heating
operation to maintain the e󰀨ective suction superheat set
point. EVO is either driven to the 100% open position or
modulated to maintain the e󰀨ective subcooling set point
during cooling operation.

Daikin MicroTech III DPS Specifications

General

Brand	Daikin
Model	MicroTech III DPS
Category	Controller
Language	English