FDB2 FIRE AND GAS DAMPER - Halton

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FDB2 Installation, operation and maintenance instructions Version: 10 Date: 19.12.2012 4-module damper NOTE: 4-module dampers are shipped with cross-shaped connection pieces (figure 6). Install a connection piece on both side of the damper for maximum air tightness (figure 7). IMPORTANT NOTICE! If a module damper is delivered already assembled as per customer request, it is the duty of the customer to tighten all module construction bolts in the installation phase! Main sales office & factory Tel. +358 (0)2079 2200 Fax. +358 (0)2079 22060 http://www.haltonmarine.com Page 8 of 21
FDB2 Installation, operation and maintenance instructions Version: 10 Date: 19.12.2012 2. OPERATION INSTRUCTIONS FOR ELECTRICAL DAMPERS 2.1. GENERAL Electrical dampers can be fitted with many different types of electrical actuators that operate the damper blades. Electrical actuators usually include internal open/closed limit switches that can be used to detect the position of the damper from remote systems. The voltage and current required for each damper depends on the type of actuator. 2.2. ELECTRICAL CONTROL SYSTEM Supply voltage depending on the actuator type is supplied to the junction box. This is connected via a micro switch/ fusible link assembly to the drive Actuator. This supply voltage provides the motive force to open the damper blade in which position it will remain as long as the supply voltage is maintained. Isolation of the Actuator from the supply voltage allow the spring-return forces in the Actuator to rotate it back through 90 degrees to the damper “closed” position. This is the basis of the “fail safe closed” mode of control. The movement of the damper blades is accomplished with a rotary, single-acting, spring-return Actuator, which is directly attached to one of the blade drive shafts. The other blades are connected to the driven shaft by means of a linkage mechanism. The damper open and closed conditions are selected by energizing or deenergizing the control voltage supply. The damper can be controlled from remote systems simply by turning the supply power on and off. Local control and monitoring can be achieved with FD-CON-2 accessory control boxes. Multitude of different additional limit switches and other components can be installed to the damper according to order specification. 2.2.1. Normal operation A) To select damper ‘OPEN’ energize control voltage supply. Supply voltage will then pass via the micro switch /fusible link assembly into the damper Actuator hence opening the damper. B) To select damper ‘CLOSED’ de-energize the control voltage supply. The spring return Actuator closes the damper. 2.2.2. Automatic damper closing The damper will automatically ‘CLOSE’ if the temperature of the air within the damper duct exceeds 50 (option 74, 100) degrees centigrade thus breaking the fusible link which allows the micro switch to go into the “closed” position thus de-energies the spring return Actuator. 2.3. MANUAL OVERRIDE Manual override functions for electrical dampers are always a special solution and depends heavily on the type of actuator used. If the manual override function is required in the order specification then a separate detailed manual will be supplied for this operation. Main sales office & factory Tel. +358 (0)2079 2200 Fax. +358 (0)2079 22060 http://www.haltonmarine.com Page 9 of 21
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FDB2 FIRE AND GAS DAMPER - Halton

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