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250 mm ø Centrifugal in-line fanInLineVent
®
RR, RRK and SilentBox
®
For medium to smaller air flow volumesagainsthighresistances. Models RR Models RRK SilentBox
® SB Market leading range offering an excellent value for money.Alternative version made from impactresistant polymers.Virtually noise freefan, with high air flow and pressure.
Ideal for cleaning and maintenance. Specially designed to be installed in-line in circular ducting. High
pressurecharacteristic to overcome resistances of bends, filters etc.Universal in application for domestic, commercial and industrial purposes. Special features Compact design to minimisespace and cost using in-line
installation. Intake and exhaust spigot fit into standard duct sizes. 100% speed controllable toachieve any required duty. Installation in any position. Extensive accessory range. Optimised aerodynamic casingdesign.
Dimensions in mm Features of all models Specification RR Specification RRK Specification SilentBox
® Motor Low noise external rotormotor with ball bearings, impregnated windings insulation
class B, designed for continuous
operation, maintenance free andradio suppressed. Casing Made from robust galvanised steel for harsh
working conditions. Spigots on intake and exhaust fit standard ducts. Casing All components are made from corrosion and impact
resistant polymers. Six guide vanes increase the fan’s efficiency.Colour: Helios-red. Casing Like an internal attenuator.Acoustically lined with abrasive
resistant 50 mm thick mineral fibreboard. Four quick releaseclasps permit easy access tomotor scroll and impeller set. Pull out motor and impeller. Electrical connection Terminal box (IP 55) located onouter casing. Speed control Electrical connection Spigots on intake and exhaust
with twin-seal rubber gaskets fit into standard ducts.
Stepless 0 – 100 % by use ofelectronic controller or 5 steppedby low noise transformer. Terminal box (IP 55) located onouter casing. Impeller Backward curved centrifugal impeller made from
galvanised steel. Directly fittedon motor and dynamically balanced as a unit providing low
sound levels and high efficiency. All parts manufactured from galvanised sheet steel. Impeller Backward curved centrifugal impeller made frompolymers. Directly fitted on motor and dynamically balanced
as a unit providing low noise levels and high efficiency. Installation
Installation in anyposition without restriction:– horizontally, vertically or pitched– suitable for intake or extract.
To keep sound levels inside the ventilated rooms as lowas possible we recommend the fan is installed as remote as possible. Electrical connection Terminal box (IP 55) is supplied
with a 60 cm long electric cable. Motor protection Motors havethermal contacts wired in series with the windings whichautomatically reset. Impeller Low noise forward curved centrifugal impeller, Motor protection Motors havethermal contacts wired in series with the windings which
automatically reset.
housed within an aerodynamically shaped scroll made from galvanised steel. Bell mouth
shaped inlet ring to achieve optimum air flow. Protection class When installedin ducting the fan is rated IP 44. Protection SplashprooftoIP44. Motor protection
Motors havethermal contacts wired in serieswith the windings. To reset thethermal contacts the main supply must be switched off. Protection IP44
NEW! NEW!
Technical informationTypeRR 250 ARR 250 CRRK 250SilentBox ® SB 250 C Ref. No.5652566059789512 Connection spigot ø mm250250250250 Air flow volume (FID) in m 3 /h8801100840980 R.P.M. 2580242025502120 Sound pressure level at 1 m – Case breakout dB(A)48555337 – Air noise on intake dB(A)65666152 Voltage:Volt/50 Hz230 V / 1 ph.230 V / 1 ph.230 V / 1 ph.230 V / 1 ph. Power Watts 115185125255 Current Amps 0.500.810.521.13 Nominal weight in kg4.65.03.618 Maximum air flow temperature °C60554535 Wiring diagram No. SS-508SS-508SS-508SS-508 160