» BMS Interface Overtemperature Alarm:  OTF 1 

The OTF system is a range of Overtemperature Alarms specifically designed for Computer Rooms and other similar technical areas which require notification to the Building Management System of out-of-limit temperature conditions. The OTF Module is the smaller unit shown top left of the picture. 

The OTF BMS Module is an alarm interface type unit which has no audio/visual alarms but which provides changeover contacts to a BMS system or to other alarm systems. The OTF+Plus Module (shown) is also available having audio/visual alarms and which is fitted with three additional LED indicators (advising Power On, Alarm, and Line Fault), and also an internal horn and a mute button. The OTF controller can be manufactured for either a 110V or 240V AC supply, or 24V AC supply (optional 12 - 24V AC or DC). The system is provided with a 'no-volt' output signalling relay (rated 230VAC 2 amp) with 'normally open/closed' change-over contacts. Optional Power and Fault changeover relays can also be provided. 

The OTF System comprises of the OTF control unit connected by a signal cable to an adjustable temperature sensor. The temperature sensor can be either the ‘tamper-resistant’ type with internal adjustment for the setting of the desired trip temperature, or alternatively can be an adjustable Digital Temperature Readout Sensor which indicates the temperature at the location of the sensor. The temperature trip points are adjustable and when the area reaches the overtemperature level, the relay in the OTF Controller activates, and remains on while the sensor continues to be in alarm. The alarm will automatically reset when the temperature returns to normal. 

The OTF System can also be supplied composite with the Aqualeak SoloDial SD1and fitted to the top of the Autodial cabinet (as shown). The system would then be supplied pre-wired and pre-connected. The power supply for the OTF would come internally from the AutoDial Unit. The Battery Backup, if fitted to the AutoDial, would therefore be shared, making both units operative in the event of power failure.