AAF HermanNelson IM 725 Installation Manual - page 30
30
IM 725 (1-02)
Remove debris, heavy dust and
dirt or any obstruction from the
area in front of the return air intake
grille at the floor,(approximately
3' - see shaded area) as this will
affect unit performance. If a
draftstop system has been
installed be sure that all draftstop
intake grilles are unobstructed.
NOTICE
See Figure 95 for oiling points. Access to fan shaft bearing is through
left top access door. Access to the motor bearing is through the right
top access door. Lift the oiler cap. Oil, using a few drops of high grade
SAE 20 or 30 nondetergent oil. Do not over-oil.
Access To Fan Shaft Bearing
Through Left Top Access Door
Bearing Oiler Cap
Figure 95 - Oiling Points
Figure 93 - Cabinet(s) Meeting Unit Ventilator
Step 5
Prepare Unit Ventilator(s) for Start-up
Installing Unit Ventilator End Panels:
See Figure 94. Accessory end panels are shipped separately with
hardware and kickplate. Align each end panel with the top and front
edges of the unit ventilator. Attach each end panel to the unit ventilator
using the hardware provided.
Tinnerman Clips
Tinnerman Clips
Screws
(insert through end
panel and thread into
tinnerman clips on unit
subbase)
Screws
(insert through upper mounting holes inside unit end
compartment, and thread into tinnerman clips on end
panel)
End Panel
Figure 94 - Install End Panels With Provided Hardware (1" End Panel
Shown)
Fit Front Alignment Bar Into Welded
Notches Permitting Alignment Of Storage
Accessories With The Unit Ventilator
Adjustable Kick Plate
And Leg Levelers
Alignment Slot
Access To Motor Through Right
Top Access Door
Oil
Oiling the Fan Shaft Bearing and Motor:
Do not attempt to operate the unit fans until the fan bearings
have been oiled.
Unit Ventilator Start-up
After the unit ventilator has been properly installed, activate unit
electrical power and applicable chilled water/hot water/steam/
refrigerant systems.
Before proceeding inspect the fan system, ensure all parts are aligned
properly and move freely. Inspect fans and fan discharge area for
obstructions. Rotate fan manually. Check that a clean filter is installed
and area in front of unit ventilator is free of debris (see figure 93).
Using the applicable control, activate the unit ventilator. Depending
on the operating mode selected, the dampers, fans, and other
components should operate as needed.
Run the unit ventilator for ten minutes, listening and observing. Fans
should be operating correctly, and rotating in the proper direction,
without unusual noise. Likewise, the unit should be free of sheet metal
rattles and / or unusual noises. All panels should be in place and
properly fastened, and checked for air leaks and condensation.
Step 6
Complete Check, Test and Start Procedure
(see page 39)
CAUTION
!