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Operation
NOTE: Air direction settings are shown in Figures 6, 7,
and 8.
IMPORTANT. IN FREEZER APPLICATIONS, UNIT IS
ALWAYS MOUNTED OUTSIDE (WARM SIDE) OF
FREEZER OR COOLER.
NOTE: Cold air will try to escape near floor level. Warm
air will try to penetrate curtain near top of doorway. Air
flow can be controlled by direction of nozzle louvers and
by high/low settings.
Maintenance
WARNING: ALWAYS DISCONNECT POWER SUPPLY
BEFORE SERVICING.
LUBRICATION
Ball bearings are permanently lubricated and require no
further lubrication.
CLEANING
1. The air door cabinet may be wiped off with a damp
cloth. Do not allow motor to get wet. Do not use
solvents or harsh detergents.
NOTE: Keep air intake louvers clear of dirt and dust
accumulation which could affect performance.
2. Check blower wheels for accumulated dirt twice a year
and clean. If disassembly is required, see GENERAL
SERVICING section.
GENERAL SERVICING
WARNING: IF SERVICING IS REQUIRED, IT SHOULD
BE DONE BY QUALIFIED PERSONS ONLY.
WARNING: ALWAYS DISCONNECT POWER SUPPLY
BEFORE SERVICING.
1. Remove motor/blower assembly. All motor/blower
assemblies are designed for easy removal and service
with wing nuts and quick disconnect electrical
connections.
2. Place motor/blower assembly on workbench.
3. To replace blower wheel, remove the three slotted hex
head screws on outer blower ring assembly (See
Figure 9, Replacement Parts Illustration.) The wheel
is held onto shaft by one hex head screws.
IMPORTANT: NOTE POSITION OF WHEELS TO
PREVENT RUBBING WHEN REPLACED.
4. To remove motor:
a. Remove blower wheels. (See Step 3 above.)
b. Remove blower scrolI (six hex head screws).
c. Unscrew and remove motor mounts.
5. Replace motor/blower assembly.
Figure 6 - Desired Air Flow
Adjustment for Temperature and
Humidity Control.
Figure 7 - Desired Air Flow Adjustment
for Insect and Dust Control.
Figure 8 - Desired Air Flow
Adjustment for Freezer and
Cooler Applications.
4
1. After power has been connected to unit, fans will start
in either preset (high/low) speed selection.
2. Air velocity is controlled by selection of high or low
speed indicator. This feature allows the setting of air
velocity to individual desired performance and energy
efficiency.
3. Air direction at outlet can be controlled by adjustable
vanes at the nozzle which compensates for possible
draft conditions.