Direct Connection - Robertshaw SER Serie Manual De Instalación, Operación Y Mantenimiento

INSTALLING DUCTS TO / FROM INSIDE
To maximize airflow in the ductwork system, all ducts should be kept short and have as few bends or elbows as possible. Forty-five
degree are preferred to 90º elbows. Use "Y" tees instead of 90º elbows whenever possible.
All duct joints must be fastened with screws or duct sealant and wrapped with a quality duct tape to prevent leakage. Aluminum foil
duct tape is recommended. Galvanized ducting from the ERV to the living areas in the house is recommended whenever possible,
although flexible duct can be used in moderation when necessary.
SUPPLY AIR DUCTING
In homes without a forced air furnace, fresh air should be supplied to all habitable rooms including, bedrooms and living areas. It
should be supplied from high wall or ceiling locations. Grilles that diffuse the air comfortably such as Robertshaw grilles MGE (metal)
or PGE (plastic) are recommended.To avoid possible noise transfer through the ductwork system, a short length (approximately 12",
300 mm) of nonmetallic flexible insulated duct should be connected between the ERV and the supply/exhaust ductwork system.
The main supply and return lines to/from the ERV should be sized to matched the diameter of the port collar found on the ERV model
chosen. Branch lines to the individual rooms may be as small as 4 inches (100 mm), but 5 inch (125 mm) lines are preferred.If the
floor is the only option available, then special care should be taken in locating grilles. Areas such as under baseboard heaters will help
to temper the air.
PRACTICAL TIPS
• Building Codes and
Combustion Appliance
Installation Codes do
not allow location of
return air grilles or any
opening such as a
"breathing tee" in an
enclosed room with
spillage susceptible
combustion appliances.
• The fresh air inlet from
the ERV needs to
respect a minimum
distance from the furnace
return drop to ensure
proper air mixing and
temperature at the
furnace core.
See furnace manufacturer
for appropriate
specifications.
10

Direct Connection

• Should you wish to hard duct the supply air directly
into the air duct return of the furnace or air handler,
remember to check the airflow balance of the ERV with
the furnace fan both "on" and "off" to determine that
it does not imbalance the ERV more than 10%.
CAUTION: In humid climates, it may be preferable to have a dedicated ducting system to the house
for the ERV instead of connecting the ERV to the central air-conditioner. Since the central
air-conditioner fan must be running continuously to allow the fresh air from the ERV to be
properly distributed throughout the house, it may pick up humidity from the cooling coil
when it is not operating and re-distribute it to the house, causing excess humidity. This
situation may be particularly aggravated if the air-conditioner is over-sized.
For minimum distance
See local building codes
and practical tips.
from ERV