Transcript
ADB Interface Box
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Approved Document ‘B’ Interface Box
Description There are a number of uses for the interface box. One ADB interface box may control a stair vent in conjunction with a break glass situated at the bottom and top of the stairs. When used in smoke shaft installations or when window actuators are required to open on smoke detection, an ADB interface box will be required on each floor of the premises. The ADB unit provides the communication between the smoke detectors, AOV actuators, call points (break glasses) and the stair and smoke shaft roof vents. Alternatively the smoke detector circuit may be connected to third party fire alarm volt free relay modules. The ADB2 unit provides a N/O volt free contact. This may be used for control of door entry systems where localised unlocking is required or provides the facility for ‘grounding’ of lift installations. The floor units are known as ADB1 and require no alterations. They provide the necessary floor control function and also send the fault signal to the ADB2 unit. The ADB1 unit requires the link (L1) to be cut in the box to convert it to an ADB2 unit. This will operate on any signal on the system and provides a volt free contact which operates on any signal on the system.
Technical Specifications Supply
Maximum Voltage is 30V DC
Housing Dimensions
(excluding glands) 150mm W x 200mm H x 80mm D
Connections
(NO) Contacts
3 port plugs for power in/power out and communication cable.
3 port plug for latching detector or volt free fire alarm contact. 5 port plug, 3 for either reverse polarity or powered/sprung operated motor & 2 for break glass
Contact Rating
Relay contacts rated at 10A 24V dc and fused at 5A 24V dc
Fuse may be 5A slow blow glass or 5A resettable type
Enclosure CE Marked ADB2 Option
Grey ABS (Thermo Plastic) with tamper evident loop positions.
Suitable for indoor use only A link can be cut on the common ADB2 box to the stair and smoke shaft vent. This provides a volt free contact for any signal in the system.
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Size and Assembly
Fig.1
Installation Instructions WARNING
1. The installation and service of the ADB Interface Box must only be made by a suitably skilled and qualified person in accordance with the applicable standards and guidelines. 2. Do not connect a mains voltage to any terminal 3. Maximum voltage to any terminal is 30V DC 4. Maximum current 2A 5. This unit must only be used with suitable components approved by Be-‐Safe.
Location and Mounting 1.
This unit must be installed indoors and protected from the weather. When choosing the site it is recommended that the terminals, LED and reset button are easy to see and access for inspection and service: for example, on a vertical wall at eye level. The ADB is typically located in the electrical riser on each level beside the cable tray. Ideally locate where tampering is not possible. Risk of exposure to water or fine particulates should be avoided by positioning the box away from any possible sources. Do not install the ADB Interface Box in Zones 0-‐3 as specified in Section 701 of BS 7671:2008. The unit must be fixed securely to either a vertical or horizontal surface using four fixings appropriate for the surface medium. Holes for the fixings drilled in the box base, must be within in the four circular forms located in the corners (see fig. 3). Ensure that no debris remains in the box after drilling. After fixing the unit to the wall, cover the screws with the 4 supplied blanking plugs (see fig. 2).
2. 3. 4.
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Fig.2
Fig.3
Connections All connections to be made without supply to the unit or ancillaries. 1. 2.
3.
When the unit is secure the cables may be inserted. Only the appropriate FP200 fire rated cable must used and stripped to allow 150mm to 200mm (fig.2) before inserting into the cable glands to allow cables to be dressed. 2 The cables that supply power and link ADB units must be 3 core 2.5mm , it is recommended that these are in a different colour (for example white) for identification purposes. The Actuation and Detection cables must be 2 1.5mm (shown above in red), it is recommended the Actuator/Break Glass cable is four core, and the detector is 3 core. An example system is shown on page 6; however alternative formats may be achieved within the guide lines of Building Regulations Approved Document B.
Fig.4 Note: The ancillaries specific wiring diagram must be used in order to create the correct connection format. The above is a typical example.
4.
5.
When the cable positioning is achieved tighten the cable glands to secure them. Connections can then be made using the removable terminals. For ease of installation the terminals can be lifted from the Printed Circuit Board (PCB), for ease of access. Ensure that the conductor’s insulation is sufficiently close to terminal blocks to eliminate the risk of short circuiting.
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6.
All wires must be securely fastened, but do not over tighten. When the terminal connections are complete connect the terminal blocks back to the PCB and dress the cables (as illustrated in fig. 3). Ensure that the correct terminals are positioned in their respective locations. Variations 7. If a Break Glass is not connected to terminals I&J, the terminals must be “linked out” using the appropriate 2 1.5mm flex. 8. If a Smoke Detector is not connected to terminals G&H, the terminals must be “linked out” using the appropriate 2 1.5mm flex. Installation design will differ depending on site requirements; an example on page 6 shows a typical installation. • After installation is complete the system can be powered up, the red LED should illuminate.
Fig 5. ADB Interface Box schematic with the relay shown in open condition.
ADB Motor Terminal Polarity
K
L
Alarm State Normal
-‐ +
+ -‐
Always check that the terminal polarity is correct for the selected AOV model. (Fig 4. cable colours are for example purposes only)
System Setup
1. 2. 3. 4.
Ensure all ADB Power in & Power out cables are disconnected from the ADB sockets. Power UPS power supply and ensure 24V output is present. Plug in ADB Box first power in / power out closest to power supply, once actuator has reached full extent proceed to the next ADB box. Repeat the above process floor by floor.
Note: Do not power up all ADB boxes at once, follow procedure 1 – 4 above
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Testing and Commissioning
When all system connections are complete, the system must be tested. 1. To test the system, insert a test key into a Break-‐glass (call point), On triggering this the ADB1 will operate the AOV on the floor that the test is being conducted and the roof or stair vent that is operated by the ADB2 will open. 2. Smoke detectors must also be tested using a specialist smoke spray. (Available to purchase from Be Safe direct) 3. The smoke detector can be by passed by lifting the manual relay switch up which will simulate smoke detector operation 4. Always ensure that the relay manual operation switch is in the home position for operation. 5. When the system has been successfully tested and is ready to be commissioned, the ADB lid must be secured using the four screws provided to compress the seal on all sides. 6. Two tamper evident securing ties can be added to the box through the holes located on the sides of the box. Alternatively Tamper evident tape can be positioned over the join and the screw holes on opposite sides.
Non Emergency System Operation The smoke detectors operate on a latching system. This means when smoke is detected and the AOVs are activated, the system can only be reset by pushing the reset button mounted on the ADB. Localised actuation of the AOVs (for example accessing a shaft door on one level) can be achieved by inserting a key into the appropriate level's break glass.
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Example System Installation
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Conversion from ADB1 to ADB2. The ADB Interface Box (as supplied) can be converted into an ADB2 box or Slave Unit by removal of the “L1” Link. This allows the volt free contact to be used. Location and fixing is to be completed according to the ADB1 instruction (see pages 1 and 2). Wiring connections must be completed with the following circuit, as illustrated below in fig.6. Refer to the ADB2 Terminal Polarity table for connections-‐ these are the reverse of the standard ADB. Unused interface detectors must not be ‘linked out’. Any un-‐used cable glands should be blanked using a suitable non-‐deformable insulating cylinder.
• • • •
Fig.6
ADB2 Note: motor polarity is inverted compared with a standard ADB-‐ refer to Polarity table and AOV device manual.
Fig 7.
ADB2 Motor Terminal Polarity
K
L
Alarm State Normal
+ -‐
-‐ +
Always check that the terminal polarity is correct for the selected AOV model. Diagram cable colours are for example purposes only.
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