Specifications

RK0YG302 © Danfoss 04/2007 175
KVS
Stepper motor switch sequence:
↓ Opening ↓
↑ Closing↑
STEP
Coil I Coil II
Red Green White Black
1 +-+-
2+--+
3 -+-+
4-++-
1 +-+-
Electrical data
Additional information!
Technical brochure KVS: DKRCC.PD.VC1.A
Ordering
Parameter KVS 42-54
Stepper motor type Bi-polar - permanent magnet
Step mode 2 phase full step
Phase resistance 52Ω ±10%
Phase inductance 85 mH
Holding current Depends on application.
Full current allowed (100% duty cycle)
Step angle 7.5° (motor),
0.9° (lead screw),
Gearing ration 8.5:1. (38/13)
2
:1
Nominal voltage (Constant voltage drive) 12 V d.c. -4% +15%, 150 steps/sec.
Phase current (Using chopper drive) 100 mA RMS -4% +15%,
Max. total power Voltage/current drive: 5.5/1.3 W (UL: NEC class 2)
Step rate 150 steps/sec. (constant voltage drive)
0-300 steps/sec. 300 recommended (chopper current drive)
Total steps 3810 [+160/-0] steps
Full travel time 25.4/12.7 sec. (voltage/current)
Lifting height 17.2 mm (0.68 in.)
Reference position Overdriving against the full close position
Electrical connec-
tion
4 wire 0.5 mm
2
(0.02 in
2
), 2 m (6.5 ft) long cable
1
) Rated capacity is the valve capacity at
evaporating temperature t
e
= –10°C (14°F),
condensing temperature t
c
= +25°C (77°F) and
pressure drop across valve Δp = 0.2 bar (2.9 psig).
Type
Rated capacity
1)
Valve KVS + actuator AST
R22 R134a R404A/R507 Connection
Code No.
single pack
kW TR kW TR kW TR mm in.
KVS 42 40.4 11.4 29.3 8.3 35.3 10.0
22
7
/
8
034G2058
28 1
1
/
8
034G2050
35 1
3
/
8
034G2051
1
5
/
8
034G2052
KVS 54 55.5 15.7 40.3 11.4 48.5 13.7
1
5
/
8
034G3050
54 2
1
/
8
034G3051