VA7810 Series Self-Calibrating
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European Electronic Controls Catalogue Catalogue Section E 8 Product Bulletin VA7810 Issue Date 1004 VA7810 Series Self-Calibrating, Force Controlled Electric Valve Actuator I ntroduction The VA7810 non-spring return actuator with 1000N thrust for valves in heating, ventilation and air conditioning applications is available for floating (3-point) control or proportional control. All models have manual override as standard and provide stroke capabilities of 7 mm to 25 mm. Proportional models are self-calibrating. The actuator is intended for use with VG7000 and VGS8...threaded valves as well as VG9000 and VG8000 flanged valves. All valves should be fitted in accordance with the maximum close-off pressure ratings specified (see pertinent valve product bulletins). Valve-actuators can be ordered as separate units or as a factory fitted valve / actuator combinations. □ Proportional actuators are self calibrating. □ Force controlled motor shut-off. □ Manual override as standard. □ Unique swing-gate yoke. □ IP54 enclosure protection. □ Delivered with fitted 1.5 m cable. □ Status LED. □ Models with optional aux. switches or 2 kQ feedback potentiometer. □ Control-Signal failure - stem to pre-determined position. □ Stroke position indicator. Easy, quick and precise commissioning and servicing means cost savings. Ensures that the maximum thrust has been achieved. Allows manual positioning independent of the power supply on all models. Allows lateral mounting of the actuator reducing the vertical space over the valve needed for installation. Allows installation in a wide range of environments. Saves time and protects actuator during installation. Visual actuator status monitoring. Provides potential free contacts for user availability or independent monitoring of the actuator’s status. Actuator pre-set position after a control signal failure (extended/retracted), is selectable in-situ. Automatic adjustment of stroke indicators at the start of the first cycle.

O rdering data O rdering procedure The actuator can be ordered as a separate unit or a factory fitted valve-actuator combination. Should the latter be requested, please just add “+M” to the end of the actuator ordering code. For example: Item 1 VGS8F1W1N (valve body) Alternatively, to order a factory fitted combination. Item 1 VGS8F1W1N (valve body) A ctuator / valve combinations The VA7810-xxx-11 with threaded coupler can be combined with the following valve range: • VG7000 series PN 16 Female and male threaded valves VG7 □□□□ T SS Trim DN 15...50 Brass trim DN 25...50 The...

O peration Floating models * "Control signal failure" position pre-set does not operate when 0.20 mA control is selected. The action mode, DA (direct acting) and RA (reverse acting) is set through the DIP switches (see paragraph "DIP switch settings" on page 5). The actuator control signal has a buffer zone, at each end of the span, of 0.3 V (0.6 mA). This ensures definite valve close-off. Note: When ever the actuator is newly placed on a valve, auto-calibration must be carried out.

Control signal failure pre-set position (not functional with 0...20 mA control selected) A control-signal failure on proportional models will cause the actuator to automatically move the stem to a (via DIP-switch) pre-selected position (100% extended or 100% retracted). Auto Calibration - Preset Signal Ranges (DIP SWITCH 3 = OFF) To change the Factory Default parameters the control input signal parameters can be selected by means of a DIP switch (see “DIP switch setting” on page 5). The standard control signals are selected by setting DIP switches 2, 3 and 4 (see “DIP switch settings” on...

Manual override When the crank is pushed into the hexagonal opening power is interrupted and manual operation is engaged. Turning the hand crank clockwise extends the stem and counter-clockwise retracts the stem. Pushing the hand crank down again disengages the manual operation and reconnects the power. D IP switches settings (Proportional models only) Note: * Does not operate with 0...20 mA control. Action depending on DIP switch-settings.

A pplications: Parallel and sequential operation Actuators without built-in positioner for controllers with PAT (Positioning Adjusting Time) output in parallel operation Actuators with built-in positioner for controllers with 0…10V output in parallel operation All actuators have the same nominal running speed (rate of travel), see specifications. The number of actuators that can be linked to a single controller depends on the controller’s active power in relation to the actuators power consumption. The controller 0…10 V output can operate several actuators with built-in electronic...

W iring Diagramswith a fitted 1.5 m long cable. The cable numbering corresponds to the actuator Actuators are delivered terminal numbering as seen in the wiring diagram. Black/Blue Black/Grey White /Grey White /Blue

iring Diagrams Actuators are delivered with a fitted 1.5 m long cable. The cable numbering corresponds to the actuator terminal numbering as seen in the wiring diagram Proportional Models VA7810-GGC-1x . WARNING For 0(4)...20 mA control the grey wire must be moved from the 3V terminal to the 3A terminal!

Feedback signal 2 mA max. @ 0(2) VDC - 10 VDC, 5 kQ min. load Manual override Standard Thrust Stroke Nominal stroke timing : Enclosure protection Protection class Noise pollution Materials: Gearbox & yoke Cover Stem Coupler Ambient Operating Condition Ambient Storage Condition Wiring Wiring entrance Net weight Life time C€ Compliance Die cast aluminium Resin ABS/PC - UL94-V0 Stainless steel Brass -5°C - 55°C, 10% - 90% RH non-condensing -40°C - 80°C, 5% - 95% RH non-condensing 1.5m cable length (0.75 mm2) halogen free components attached per 1.5 mm2 terminal M16 cable conduit...