KAH Operation & Maintenance Guide
Page: 51 of 88
Krueger | 1401 N Plano Rd | Richardson, TX 75081 | 972.680.9136 | [email protected] | www.krueger-hvac.com
SECTION 3 - MAINTENANCE (CONTINUED)
ENERGY RECOVERY WHEEL
This AHU will be equipped with an energy recovery wheel
from one of the following vendors. Refer to the correct
instructions to maintain and clean this AHU.
•
Airxchange®
•
NovelAire® Technologies
•
Thermowheel®
•
Innergy Tech®
AIRXCHANGE®
Tools and Materials
•
Brushes
•
Loctite
•
Screwdriver
•
Acti-Klean or alkaline detergent
Periodic cleaning of the energy recovery wheel will
be a function of the operating schedule, climate, and
contaminates in the indoor air being exhausted and
outdoor air being supplied to the building.
Cleaning the Wheel
•
To clean, gain access to the energy recovery wheel
and remove the segments as shown in the service
manual.
•
Brush or vacuum foreign material from the face off
the wheel.
•
Wash the segments in a 5% solution of non-acid
based coil cleaner (see material list) or alkaline
detergent and warm water.
•
Allow segments to soak in solution until grease and
tar deposits are loosened. An overnight soak may be
required to adequately loosen heavy deposits of tar
and oil based contaminants. Before removing from
solution, rapidly run finger across surface of segment
to separate polymer strips for better cleaning action.
Rinse dirty solution from segment with clean water
and allow excess water to drain prior to remounting
segments in the wheel in the service manual as
shown in Figure 59 (right). A small amount of water
remaining in the wheel will be dried out by the airflow.
NOTE -
Some staining of the desiccant may remain
and is not harmful to performance.
CAUTION -
Do not use acid based cleaners,
aromatic solvents, steam, or temperatures in
excess of 170°F: damage to wheel may occur!
FIGURE 59 - RINSE SEGMENTS
FIGURE 60 - DIAMETER SEAL ADJUSTMENT
To Remove
Rotation
Diameter
Seal
To Adjust
Feeler
Gauge
Diameter Seal
Adjusting Screws