Cla-Val 350-07/3650-07 - Manual (Page 15)

RDH051228,TB_300-SingleModeControls32.doc,6/16/2006
Technical Bulletin
300 Series (Single-Mode) Electronic Actuated Pilot Controls
Introduction
CDB-32, CDHS-32, CRA-32, CRD-32, and CRL-32 are pilot controls for Cla-Val 300 Series Electronic Actuated
Control Valves. These controls offer the same hydraulic control of the valve as existing manually-set controls, along
with additional remote electronic setpoint adjustment capabilities. The new pilot controls consist of a modified pilot
control sub-assembly, and the 130VC-2 Electronic Actuator with mounting components. Complete controls are valve
mounted with an accessory X56 Mounting Assembly.
I. O. M. Information
A. The 130VC-2 wiring diagram is included with this technical bulletin. The 5-wire cable is permanently attached to
actuator and should be terminated in suitable junction box. Care should be used when attaching to wires to avoid
damage. There are no user serviceable parts inside the actuator and tampering or opening it will void the warranty.
B. For Installation, Operation and Maintenance information only on the pilot sub-assembly use instructions in the
appropriate N-sheet for the manually adjusted pilot control. Since the 130VC-2 Electronic Actuator changes the
setpoint adjustment of the control, all other service and maintenance information remains the same for both. See
table below.
C. Additional service notes:
1. Before disassembly of pilot subassembly from 130VC-2 actuator, adjust pilot control to full minimum range setting
with laptop computer and 130VC-2 software to ensure full adjustment range when reassembled.
2. Note orientation of sub-assembly ports and bracket. Coupler and blue Aluminum bracket will remain attached to
actuator. Loosen and remove jam nut and washer from sub-assembly cover as sub-assembly is removed from
130VC-2 bracket. Count number of turns counterclockwise of pilot adjustment shaft from minimum range set position
to full out stop position. See pilot drawing.
3. After servicing the pilot sub-assembly, re-establish minimum spring setting by manually turning adjusting screw
counterclockwise until it stops (full out stop position). Then, turn in same number of turns found in step 2 to minimum
range set position.
4. Do not lubricate coupler slots. A small amount of waterproof anti-seize grease is used only on sub-assembly
adjusting screw threads and contact point with spring guide inside cover.
5. Reinstall sub-assembly to bracket with jam nut and washer. Check coupler slots and adjusting screw pin are lined
up while installing actuator to bracket. Be sure to retain original alignment of sub-assembly with bracket when
tightening jam nut and washer. A slight manual adjustment of adjusting screw may help align the coupler to adjusting
screw. See pilot assembly drawing.
6. After reinstalling onto valve, use laptop computer and 130VC-2 software to reset range values.
Pilot Control Pilot Assembly
Drawing
Sub-Assembly
IOM (ref. only)
Sub-Assembly
Drawing
Sub-Assembly
Repair Kit
CDB-32 205580 N-CDB-7 201935 9170023H
CDHS-32 205137 N-CDHS-11A 76832 20287401E
CDHS-32A 205333 N-CDHS-11B 205332 9170028G
CRA-32 N-CRA 82528 9170001D
CRD-32 205129 N-CRD 70899 9170002B
CRL-32 205130 N-CRL-5A 90846 20666E