![background image](http://html.mh-extra.com/html/summeraire/shrv2500dd/shrv2500dd_installation-and-owners-operating-manual_1391128011.webp)
DUCTING
WITHIN THE BUILDING
T
o reduce airflow restriction in the duct system, galvanized ducting should be
used from the HRV to different areas within the building whenever possible.
Also, to minimize airflow losses in the duct work system, all ducts should be as
short as possible and incorporate as few elbows as possible. The use of 45 º
elbows is preferred to 90 º elbows and Y tees instead of 90 º tees is also
recommended.
All duct joints must be fastened securely and wrapped with a quality duct tape,
such as aluminum foil tape, to prevent leakage.
NO
TE:
See Installation
Warning under the “Integrated HVAC System” section.
ST
ALE AIR (RETURN) DUCT SYSTEM
The Stale
Air (Return) Duct System is used to draw stale air from the points of
the building where the worst air quality problems occur. Balancing dampers
and, or, adjustable grilles are recommended on all return air lines which are
used (during installation) to help balance the “draw” from different areas of the
building. Note that the installation schematics show balancing dampers and, or,
adjustable grilles on all return air lines coming back to the HRV. Please refer to
figs. 1-3 to view the various installation system options.
A balancing damper is required prior to the HRV to balance the stale air
exhausted with the fresh air supply entering the building.
Return air extraction points should be located at the opposite side of the room
to the fresh air inlet. The inlets may be located in the ceiling or high on the
walls and fitted with inlet grilles.
Many commercial activities produce air contaminates in the form of dusts,
fumes, vapors and gases. Contaminates should be controlled at the source so
that they are not dispersed through the building nor allowed to increase to toxic
concentration levels. The HRV allows for economical operation of the HVAC
system, while effectively removing contaminates from the space. In designing
the exhaust portion of the system, the exhaust grilles are placed so as to remove
the contaminates while not allowing them to enter the breathing zone of the
occupants.
For contaminates that are lighter than air, grilles should be located high on the
wall. If contaminates are heavier than air a lower placement of the grilles will
be required. Information on contaminates specific gravity and toxicity should
be available from the chemical data sheets.
11
2500DD-Install-ENG 1/17/06 5:56 PM Page 11
Summary of Contents for SHRV2500DD
Page 5: ...5 ...
Page 6: ...6 ...
Page 22: ...22 WIRING DIAGRAM SHRV2500DD ...
Page 23: ...SHRV2500 SERVICEABLE PARTS 23 CORE THIS WAY UP FILTERS THIS SIDE ...