Krom Schroder DG 110VC, Operating Instructions Manual, Page: 8 / 10

VAA · Edition 09.21
EN-8
Mechanical data
Gas types: clean air. The air must be clean and dry
in all temperature conditions and must not contain
condensate.
Medium temperature = ambient temperature.
CE approved, max. inlet pressure p
u
: 500 mbar
(7.25 psig).
Flow adjustment limits the maximum flow rate to be-
tween approx. 20 and 100%.
Adjustment of the start rate: 0 to approx. 70%.
Opening times:
VAA../N quick opening: ≤ 1 s;
VAA../L slow opening: up to 10 s,
VAA../R slow opening: 4 s.
Closing time:
VAA../N, VAA../L quick closing: < 1 s,
VAA../R slow closing: 4 s.
Switching frequency: VAA../N: max. 30 x per minute.
VAA../L, VAA../R: there must be a period of 20 sec-
onds between switching off and on again so that the
damping is fully effective.
Valve housing: aluminium,
valve seal: EPDM.
Connection flanges:
up to size 3: Rp internal thread to ISO 7-1, NPT to
ANSI/ASME;
size 2 and higher: with PN 16 ISO flange (pursuant
to ISO 7005) .
Cable gland: M20 x 1.5.
Electrical connection: cable with max. 2.5 mm
2
(AWG 12) or plug with socket to EN 175301-803.
Duty cycle: 100%.
Power factor of the solenoid coil: cos φ = 0.9.
Recommended tightening torques for the connec-
tion parts:
Connection parts
tightening
torque
[ncm]
VAx 1: M5 500 ± 50
VAx 2: M6 800 ± 50
VAx 3: M8 1400 ± 100
electrical data
Mains voltage:
230 V AC, +10/-15%, 50/60 Hz;
200 V AC, +10/-15%, 50/60 Hz;
120 V AC, +10/-15%, 50/60 Hz;
100 V AC, +10/-15%, 50/60 Hz;
24 V DC, ±20%.
Power consumption:
type Voltage Power
VAA 1 24 V DC 25 W
VAA 1 100 V AC 25 W (26 VA)
VAA 1 120 V AC 25 W (26 VA)
VAA 1 200 V AC 25 W (26 VA)
VAA 1 230 V AC 25 W (26 VA)
VAA 2,
VAA 3
24 V DC 36 W
VAA 2,
VAA 3
100 V AC 36 W (40 VA)
VAA 2,
VAA 3
120 V AC 40 W (44 VA)
VAA 2,
VAA 3
200 V AC 40 W (44 VA)
VAA 2,
VAA 3
230 V AC 40 W (44 VA)
Contact rating of position switch:
type Voltage
Current (resistive
load)
min. max.
VAA..S
12–
250 V AC,
50/60 Hz
100 mA 3 A
VAA..G
12–
30 V DC
2 mA 0.1 A
Switching frequency of position switch: max. 5 x per
minute.
switching
current
switching cycles*
cos φ = 1 cos φ = 0.6
0.1 500,000 500,000
0.5 300,000 250,000
1 200,000 100,000
3 100,000 –
* Limited to max. 200,000 cycles for heating systems.