Johnson Controls York VCH 20A, Technical Information

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41
Fig.5
Actuator selection jumpers
VA - 7152 - 1001 (VIR - 45A and 90A)
Jumper 6.
No function. By factory default, with jumper.
Actuator selection jumpers
VA - 7472 - 9001 (VIR - 25A and 40A)
Fig.4
The VA-7151-1001 (VIIR-45A and 90A) valve actuator is
powered by 24 VAC between terminals 1 and 2. The control
signal is from 0 to 10 VAC between terminals 3 and 4. With
0 VAC the valve is closed (by-pass) and with 10 VDC the
valve is open 100%.
The actuator has 4 input selection jumpers to coincide with
the operating range desired (Fig. 5).
Jumper 1.
Selection of input voltage: Upper jumper (0 to 10 VDC),
centre jumper (0 to 5 VDC) and bottom jumper
(5 to 10 VDC). By default, factory-set to upper position
(0 to 10 VDC).
Jumper 2.
Configures the short (stroke lengths of 1/2 inch or less),
long (stroke length of over 1/2 inch) stroke selection
jumper. By default, factory-set to long position (L).
Jumper 3.
Configures the direct/inverse action jumper so that the
valve shaft goes in the desired direction. By default, fac-
tory-set to lower position, inverse action (A1).
Jumper 4.
Configures the failure position jumper. If the signal is lost in
the actuator (connection closed), the actuator, by default,
will go to the established position. Factory-set to closed
position.
Physical data
For models
VIR 25A VIR 40A VIR 45A and 60A VIR 75A and 90A
Depth pipes 2 2 2 2
Height pipes 16 19 20 22
Diameter pipes 3/8" 3/8" 1/2" 1/2"
Length fins 1 069 1 312 1 895 2 155
Front area m
2
0.49 0.70 1.32 1.64
Intake/output connections
diameter (weld)
1 1/8" 1 1/8" 1 3/8" 1 3/8"
Weight kg 16 20 37 43
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