Installation of UL/cUL 762 Listed Fans for Restaurant Exhaust
The UL/cUL 762 listing for restaurant exhaust is available on Series 200 and 300 SWB fan model sizes 206 - 224 and 327 - 349 with a weatherhood.. UL/cUL 762 fans are listed for a maximum operating temperature of 375°F (191°C) and includes an access door and 1 inch (25.4 mm) drain connection.. An outlet guard is strongly recommended when the fan discharge is accessible.. An upblast discharge is recommended.. The fan discharge must be a minimum of 40 inches (1016 mm) above the roof line and the exhaust duct must be fully welded to a distance of 18 inches (457 mm) above the roof surface..
Alignment of Pulleys and Belts
Check pulleys and belts for proper alignment to avoid unnecessary belt wear, noise, vibration and power loss.. Motor and drive shafts must be parallel and pulleys in line as shown below..
Wrong Wrong Right
Upblast Discharge
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40 in.** |
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Weatherhood |
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Series 200 & 300 SWB models are listed for grease removal (UL/cUL 762) File no.. MH11745..
18 in.*
(457 mm)
The adjustable motor pulley is set at the factory for the fan RPM specified by the customer.. Fan RPM can be increased by closing or decreased by opening the adjustable motor pulley.. Multigroove variable pitch pulleys must be adjusted an equal number of turns open or closed.. Any increase in fan speed represents a substantial increase in load on the motor..
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**Per NFPA 96 the fan discharge must | from | *Per NFPA 96 the duct | |
kitchen | |||
be a minimum of 40 in. (1016 mm) | must be of | ||
hood | |||
construction to a | |||
above the roof surface. |
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| minimum distance of | ||
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| 18 inches (457 mm) | |
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| above the roof surface. |
This drawing is for dimensional information only.. See the latest edition of NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations for detailed installation instructions, materials, duct connections and clearances..
Pre-Starting Checks
WARNING
Always disconnect power before working on or near a fan.. Lock and tag the disconnect switch or breaker to prevent accidental power up..
To avoid motor overheating and possible burnout, motor load amperes should always be checked and compared to nameplate rating when fan speed is increased..
Wheels
Wheels must rotate freely and not rub on the inlet venturi.. Model SWB wheels overlap the inlet venturi as shown in Figure 1.. Refer to the SWB fan wheel overlap and radial gap chart for proper dimensions..
Models SFD and SFB wheels do not overlap the venturi, but have a gap between the inlet venturi and the wheel (Fig.. 2).. Wheel position is preset at the factory and the unit is test run.. Wheel movement may occur during shipment or installation and wheel alignment may be necessary..
CAUTION
When servicing the fan, motor may be hot enough to cause pain or injury.. Allow motor to cool before
Overlap
Radial
Gap
Gap
servicing..
CAUTION
Precaution should be taken in explosive atmospheres..
4Centrifugal Utility Fans
Wheel | Wheel |
Model SWB | Model SFD or SFB |
Fig.. 1 | Fig.. 2 |
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