Description
8070-0902-03X ZYGO new
The driver box is designed to operate within a temperature range of –40 to +70°C (–40 to +158 °F).Mount the driver in a location with space for adjustment and wiring access. Do not expose the driver to sources of radiant heat such as exhaust manifolds or turbochargers. Mount the driver close enough to the actuator and battery to meet the wire-length requirements (see wiring instructions in this chapter).The driver will generate some heat, so surfaces must be open to normal air
movement. No special ventilation is required. The driver must be bolted to a heat sink of a minimum 0.4 m² (4 ft²) of 3 mm (1/8-inch) mild steel.Ideally the driver should be mounted flush to the metal side of a control cabinet,
protected from the weather and high humidity, and close to the engine being controlled. Do not install the driver directly on the engine. The location should provide protection from high-voltage or high-current devices, or devices which
produce electromagnetic interference. After initial adjustments are completed,access to the driver will not be required for normal engine operation.
8070-0902-03X ZYGO new
8070-0902-03X ZYGO new
The actuators are designed for installation on the engine. The actuators will generate heat, especially when stalled or during other conditions requiring maximum torque output. Maximum operating temperature for either the ProAct™
III or ProAct IV actuator is 100 °C (212 °F).The installer must consider the heat conductivity of the installation bracket, and the operating temperature of the ultimate heat sink to which the bracket will be attached. Generally the heat transfer abilities of aluminum and low-carbon steel are better than those of high-carbon steel or stainless steel.Uninhibited air flow over the heat-exchanger fins on the side of the actuators will help control possible heat problems. Keep the fins as clean as possible to improve heat transfer. Do NOT paint the fins, since this will reduce the heat transfer efficiency.
8070-0902-03X ZYGO new
8070-0902-03X ZYGO new
The actuator’s stops must not prevent the actuator from driving the fuel linkage to the minimum and maximum positions. The linkage should be designed to use as much actuator travel as possible, without preventing minimum and maximum fuel
positions.Power supply output must be low impedance (for example, directly from batteries).Run an insulated wire directly from the positive (+) battery terminal and negative (–) battery terminal to the correct connection on the driver . Run a second insulated wire directly from the negative (–) terminal of the battery to the driver. Neither of these connections needs to be shielded. This procedure must be repeated whenever the actuator or driver is changed.The Offset and Range pots are both located on the printed circuit board inside the driver box. The Offset and Range pots are each 25-turn. Both turn clockwise to increase the position of the actuator output for a given input to the driver. See Chapter 2 for the adjustment procedure.
8070-0902-03X ZYGO new
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