The GDD Galaxy In-line Direct Driven Twin fan range represents the latest development from Vent-Axia in high performance, run and standby twin fans. Designed to be controlled in conjunction with Vent-Axia Trakmaster twin fan controller range, the total package offers the end user flexibility when interfaced with or without a (BMS) Building Management Systems, such as: manual selection; 12/24hr auto changeover ensuring the extended life of the fan and motor; night setback during low levels of occupancy, for energy management control during 24hr extraction.
The unit casing is manufactured from Heavy Gauge Galvanised Steel fitted with inlet and outlet spigots, with further optional inlet positions. Individual gravity return shutters are fitted as standard to prevent air re-circulation through the standby fan or system during shut down periods. Optional acoustic lined casings are available. The Galaxy In-Line Direct Driven Twin Fan range is specifically designed for horizontal mounting only. Assembly is controlled to BS EN ISO 9001.
All units are pre-wired to an IP44 terminal box, fitted to the outer casing to reduce installation time and cost. An optional IP65 service switch is available on request. Access to the fan section is via an easy to remove top access panel, for cleaning and maintenance during shut down periods. The Galaxy range is available in ten models with extract performance ranging from 0.067m³/s up to 1.488m³/s (201m³/h to 4820m³/h), with pressure characteristics of up 400Pa.
Motors / Impellers
Galaxy features external rotor motor and DIDW forward curved centrifugal impeller assemblies specifically chosen for performance. The assembly is dynamically balanced to ISO 1940 Grade G.6.3. Quality Class G.6.3. Ball bearings are greased for life and allow the fan to run at any angle. Insulation is Class B (from -15°C to + 40°C).
All motors are single phase 230-240V 50 Hz. A terminal box is supplied with all models protected against dust and water jets from any angle. All motors are fitted with Standard Thermal Overload Protection (S.T.O.P.) by means of a thermal contact switch incorporated in the windings to prevent motor damage by overloading/overheating.