Berner Architectural Recessed 12 handleiding

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Berner

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Handleiding

-8-

VIII. MAINTENANCE & CLEANING

CAUTION: ELECTRIC SHOCK HAZARD Disconnect power

whenever servicing unit. More than one disconnect may be

required to de-energize unit.

Keep your air curtain operating at peak eciency by cleaning

the blower wheels, motor(s) and intake grille. Buildup of dust

on the blower wheels can cause vibration, noise and excessive

wear on the motor bearings. The frequency of cleaning will

depend on the environment where the unit is operating.

Dirty, dusty or greasy environments could require a cleaning

schedule of once every two months. Otherwise, the unit(s)

should be scheduled for cleaning a minimum of once every (6)

months. To access the interior of the unit:

A. Disconnect and lockout power to the unit. If necessary

remove the blower assembly. See Section VIII SERVICE for

instructions on how to remove blower module.

B. Remove the bottom access cover by removing (2) Phillips

head machine screws located at the cover’s corners.

See Figure 7.

C. Vacuum and scrape (if necessary) to remove the buildup

of dirt and debris from the interior of the air curtain. The

motor(s) are permanently lubricated and require no ad-

ditional lubrication.

D. Pull the lter out from underneath the struts of the bottom

access cover. It is easiest to work from the middle, pull-

ing one side out and then the other. Spray the lter with

warm, soapy water, rinse, and pat dry.

E. Replace Filter.

F. Reinstall the bottom access cover.

G. Switch the power on after cleaning.

CAUTION: STAND CLEAR of the unit or wear safety goggles

as loose debris may be present and may exit the nozzle.

VII. MAINTENANCE & CLEANING

Figure 7

Figure 6 - Air Stream Adjustment

B. AIR STREAM ADJUSTMENT

1. With the air curtain operating and the door in its full

open position, check to see that nothing is obstructing

the airow at the discharge nozzle vanes.

2. Find the air stream split location. Hold a handkerchief

by its corners, approximately 304mm above the oor.

Gently move the handkerchief back and forth in the

doorway. Make sure the air is being directed to both the

inside and the outside. See Figure 6. The split location

is indicated where the handkerchief is vertical with

minimal or no uttering.

3. The split location should be approximately 76mm

outside the doorway. If necessary adjust the discharge

nozzle vanes by de-energizing the unit, loosening the

nozzle vane locking screws and adjusting vanes.

AIR

InteriorExterior

304.8mm

AIR

76.2mm

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