Silent Jetflow SJMF 315 S Inline Flow Fan Single Phase EC 315mm

The Elta Jetflow Silent SJMF315-S is a 315mm inline mixed flow circular duct fan in an acoustic enclosure, moving up to 2855 m³/h in free air and 1602 m³/h against 400 Pa. Elta rate it at just 56 dB(A) inlet at 3m on full speed.Inside, a jet design double mixed flow impeller is driven directly by a single phase brushless EC motor running at 2970 rpm and absorbing 0.386 kW, with sealed for life NWB bearings in an IPX4 motor rated for air up to 60°C. It arrives with a UK plug for fixed speed running and a 5m jack lead for speed control, and Elta give a 24 month warranty. 1 Phase EC Motor Up to 2855 m³/h Speed Controllable What it is best used forThe biggest silent Jetflow, for high volume systems on 315mm duct where noise matters: restaurant dining rooms, conference rooms, sports hall changing areas, hotel and office floors. It keeps 2722 m³/h at 100 Pa and 1602 m³/h at 400 Pa, at 56 dB(A) at 3m.It is longer and heavier than the standard fan (940mm long, 20 kg), so check the ceiling void and hang it from the hangers at both ends. Like the standard Jetflow it is for clean air up to 60°C, not for grease laden canopy extract or corrosive or explosive atmospheres.Why choose this over alternativesThe silent version and the standard SJMF315 use the same jet design double mixed flow impeller and EC drive, and airflow is almost identical (2855 against 2934 m³/h free air). The difference is the acoustic enclosure: Elta rate this model at 56 dB(A) inlet and 56 dB(A) outlet at 3m, against 62 and 62 dB(A) for the standard fan, with a calculated breakout level of 39 dB(A).That can save fitting separate spigot silencers and the space they take. Where the fan is in a plant room or above a corridor nobody uses, the standard Jetflow is cheaper and smaller.Installation notes Hang the fan from the hangers at both ends of the enclosure. It is 940mm long and weighs 20 kg, so make sure the fixings and structure take the weight, and leave access for maintenance. Connect to 315mm duct with Elta fast clamps (018-315-CLAMP) or flexible connectors so the fan can be removed later. Mains connection is by the fitted 1.5m lead and UK 3 pin plug with a 3A fuse. It is supplied for fixed speed; for speed control, remove the 3.5mm jack plug and connect the supplied jack cable to a 149-POT-10-MI, 0-10V or PWM signal (wiring diagram 152-553). Do not supply it through a timer or a regularly switched circuit: the EC motor has internal overload protection and may restart unexpectedly once it cools. Indoor use only, ambient -10°C to +60°C. Locate the discharge away from the open flue of any gas or solid fuel appliance, and inspect and clean the fan at least every 12 months. You'll also need Elta EC electronic controller 149-POT-10-MI, the potentiometer controller Elta list for this fan. Elta fast clamps 018-315-CLAMP (each) and backdraught damper 018-315-DAMPER, available to order, ask us. Elta panel filter 018-0315-FILT-P, available to order, ask us. What's in the box Silent Jetflow fan with 1.5m mains lead and UK 3 pin plug Detachable 5m lead with 3.5mm jack for speed control Browse more inline mixed flow fans, inline duct fans or Elta fans, or call us for help choosing the right fan.Specifications Model SJMF315-S Type Acoustic inline mixed flow circular duct fan Duct size 315mm Max airflow 2855 m³/h Static pressure 400 Pa Motor Single phase EC, 220 to 240V 50/60Hz, 2970 rpm Power 0.386 kW (2.73 A peak) Noise 56 dB(A) inlet, 56 dB(A) outlet, 39 dB(A) breakout at 3m IP rating IPX4 motor Warranty 2 Year Manufacturer Max air temperature 60°C Airflow at 100 Pa 2722 m³/h Overall efficiency 55.8% at best efficiency point Length 940mm Weight 20 kg Electrical connection 1.5m lead with UK 3 pin plug, 3A fuse Speed control 149-POT-10-MI, 0-10V or PWM via 5m jack lead Wiring diagram 152-553 Manuals & Guides Elta Jetflow Silent SJMF-S Datasheet Elta Jetflow SJMF Installation Manual