ETS250-400,034G2002,034G3001 Danfoss Electric expansion valve

ETS250-400,034G2002,034G3001 Danfoss Electric expansion valve operation 

The ETS valves operate modulating by
electronically controlled activation of the AST
stepper motor. The motor is a type 2-phase
bi-polar, which stays in position, unless power
pulses from a driver initiate the two discrete sets
of motor stator windings for rotation in either
directions.
The direction of the rotation of the spindle
depends on the phase relationship of the power
pulses. This is decisive for the travel of the piston.
The motor is operating the spindle, whose
rotating movements are transformed into linear
motion by the transmission in the cage assembly.
The AST motor housing has a glass sealed M12
connection as standard, which can be connected
with customized cable and plug/socket
combinations.
The piston design inside the ETS valve is pressure
balanced, giving identical bi-flow performance
capabilities and nearby identical maximum
capacities.
Closing the valve by overdriving, ensures that the
reference number in steps is always correct.
Operating the ETS series requires a controller
with either 12 V DC voltage drive (5.5 W) or using
chopper current drive (100 mA RMS).
Note:
Depending on the type of controller or driver,
there will be limitations in cable length between
valve actuator and driver.
Both the actual cable length, the level of EMC
emission on the location and driver circuit has an
impact on the actual distortion of the current to
the actuator motor.
In order to increase max. cable length
considerably, install a 10 mH filter type Danfoss
AKA 211 on the four power terminals.
Please contact Danfoss for further information
how and when to apply this countermeasure in
cases with questionable cable length.

ETS250-400,034G2002,034G3001 Danfoss Electric expansion valve incl. actuator

Type
Rated capacity 1 ) Connection
R410A R407C R22 R134a R404A ODF × ODF (A × B) Code no.
[kW] [TR] [kW] [TR] [kW] [TR] [kW] [TR] [kW] [TR] [in.] [mm] Single pack
ETS 250 – – 1212 349 1106 319 874 252 828 239
1  1 / 8 × 1  1 / 8 28 × 28 034G2600
1  3 / 8 × 1  3 / 8 35 × 35 034G2601
1  5 / 8 × 1  5 / 8 – 034G2602
– 42 × 42 034G2611*
ETS 400 – – 1933 556 1764 509 1394 402 1320 381
1  5 / 8 × 1  5 / 8 – 034G3500
2  1 / 8 × 2  1 / 8 54 × 54 034G3501
1 ) The Rated capacity is based on:
Evaporating temperature t e :  5 °C / 40 °F
Liquid temperature t l :  28 °C / 82 °F
Condensing temperature t c :  32 °C / 90 °F
Full stroke opening in normal flow direction
ETS 250, ETS 400
Valve incl. actuator
ETS 250 and ETS 400 have integrated sight glass