Page 54 of 60 / IM 798 AE Self-Contained Unit Ventilator
Step 10 –
Complete Check, Test and Start Procedure
Renewable Media
(Single-use and
Permanent Wire
Mesh Filters Also
Available.)
Provide completed Check, Test and Start form to your local
AAF
®
-HermanNelson
®
representative and specifying engineer for
verification that proper start-up was completed.
The form is enclosed in the manila envelope located behind the left
front access door.
Units must have a filter installed when operating. Operation
without a filter can compromise unit performance due to build
up of dust and dirt on components.
Turn off the unit (fan speed switch or unit on/off switch is located
behind the right front end compartment panel). Remove the center
front panel, pull out the filter and replace with a clean filter. Replace
the center panel and restart the unit.
Filters should be replaced during the first week of placing into
service to prevent dirt carry-over into the internals of the unit and
back into the classroom (see figure 108). A periodic filter changeout
program should be established. Filters should be checked monthly or
more often if conditions indicate. Filters are included in all units.
Dirty or clogged filters can impact unit performance, and
damage the unit.
Filter
Motor
Figure 108 - Filter Installation
CAUTION
!
Electric heat units should ONLY use permanent wire mesh
filters. Filters other than wire mesh are not intended for electric
heat units, and can cause unit damage, property damage or
personal injury.
CAUTION
!
CAUTION
!
Installer/Owner’s Responsibility
Protect your investment - read carefully
Your AAF-HermanNelson express written limited warranty does
not cover equipment failures that are caused by misuse, abuse, mis-
installation, failure to maintain the unit, etc. Here are a few examples
of the types of damage not covered by warranty:
1.
Damage resulting from handling during transportation or
installation.
2.
Damage to compressor resulting from improper electrical phase
hook up.
3.
Progressive damage to unit from failure to check and test at
start-up.
4.
Damage to electronic or electrical components from incorrect
or fluctuating power supply, stray static electricity, or building
automation network inputs.
5.
Inaccessibility of unit for service or parts installation that
prevents proper equipment operation.
6.
Damage to aluminum coils and electronic controls, etc., resulting
from operating the unit while building maintenance cleaning
agents are in use.
7.
Damage resulting from freezing condensate.
8.
Damage caused by not cleaning or replacing filters.
9.
Damage resulting from failure to keep evaporator coil and
intake clean.
10. Damage caused by accident, alteration of the unit design or
tampering.
Please complete and return the Check, Test and Start document
immediately to protect your warranty.
1. Before proceeding, inspect the fan system, to verify that all parts
are aligned properly and move freely. Inspect fans and fan
discharge area for obstructions. Verify that power has been
disconnected. Rotate the fan assembly manually. Check that a
clean filter is installed and the area in front of unit ventilator is
free of debris (figure 99, page 51). All panels should be in place
and properly fastened. Check for outdoor air leaks and
condensation. Verify that the coil section is properly sealed using
the insulating foam donuts supplied.
2. After the unit ventilator has been properly installed, activate unit
electrical power and applicable hot water/steam/refrigerant systems.
3. Using the applicable control, activate the unit ventilator.
Depending on the operating mode selected, the dampers, fans,
and other components should operate as needed.
4. 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. Check for air leaks and
condensation. Compressor should run without noise. If noisy,
check electrical phases to verify that the compressor is rotating
correctly. Phase reversal can damage the compressor and void
the warranty.
Step 9 – Prepare for Start-up
Remove debris, dust, dirt, and any obstruction from the area
in front of the return air intake grille at the floor.
CAUTION
!
