Valves And Functions; Sensor Location - Daikin LX10F11B3 Service Manual

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1.3.6 Valves and Functions

EEV: Electronic Expansion Valve
EEV controls super heat at the evaporator outlet
and controls the refrigerant supply amount
to the evaporator by means of temperature
sensors installed at the evaporator outlet and
inlet.
DMV: Discharge Modulation Valve
DMV is usually used at fully-open. However,
while in defrosting and heating operation, the
opening is adjusted as release control.
EMV: Economizer Modulation Valve
EMV controls the refrigerant supply amount to
the economizer while in pull-down operation
by adjusting EMV opening by means of
the temperature sensors mounted at the
economizer outlet and inlet. EMV is also used
for the discharge pipe temperature control and
charging control during defrost and heating
operation.
ESV: Economizer Solenoid Valve
Opening of ESV is synchronized with EMV.
LSV: Liquid Solenoid Valve
LSV is opened while in compressor operation. It
is closed while in defrost and heating operation
and automatic pump-down.

1.3.7 Sensor Location

RS/DRS
Evaporator
HuS
EOS
Reheat coil (option)
SS/DSS
LPT
SGS
HPT
HPS
DCHS2
Compressor
HSV: Hot gas Solenoid Valve
RSV: Reheat Solenoid Valve
PRV: Pressure Relief Valve
HSV
RSV
EIS
EFM
PRV
HSV RSV
DMV
Condenser
Receiver
DCHS1
AMBS
1-9
HSV is opened while in defrost and heating
operation to supply hot-gas from the
compressor to the evaporator and drain pan.
It is also opened to equalize the pressure to
protect compressor in case of large pressure
difference of high and low pressure while in
compressor start up.
RSV is opened while dehumidification
control operation to supply hot-gas from the
compressor to the reheat coil.
PRV is mechanical type pressure release valve.
It releases the refrigerant to the low pressure
side when the pressure rises abnormally during
non operation.
PRV EEV
DMV
Sensor mounted in outside
Sensor mounted in inside
Valve chamber
EEV
EMV
ESV
CFM
LSV
Sight glass
Valve chamber
EMV
ESV
CFM
LSV
ECO IN
Economizer
ECO OUT
Dryer