Broan ERV200 ECM, Installation Manual

Page: 9 / 56

9
3. INSTALLATION (
CONT
’
D
)
3.5 I
NSTALLING THE
D
UCTWORK AND
R
EGISTERS
(
CONT
’
D
)
3.5.2 C
ENTRAL
D
RAW
P
OINT
S
YSTEM
Stale air exhaust ductwork
Same as for Fully Ducted System, described on point 3.5.1
Fresh air distribution ductwork
• There are 2 methods for connecting the unit to the furnace/air handler:
Method 1: Supply side connection
• Cut an opening into the furnace supply duct at least 18 inches from the furnace/
air handler.
• Connect this opening to the Fresh air distribution port of the unit (use metal
duct , see figure at right).
• Make sure the unit duct forms an elbow inside the furnace/air handler ductwork.
• If desired, interlock (synchronize) the furnace/air handler blower operation (see
Section 5 ELECTRICAL CONNECTION TO THE FURNACE).
Method 2: Return side connection
• Cut an opening into the furnace return duct not less than 10 feet from the furnace/
air handler (A+B).
• Connect this opening to the Fresh air distribution port of the unit (see figure at
right).
NOTE: For Method 2, it is not essential that the furnace/air handler runs when the
unit is operation, but we recommend it. If desired, interlock (synchronize)
the furnace/air handler blower operation (see Section 5 ELECTRICAL
CONNECTION TO THE FURNACE).
WARNING
!
When performing duct connections, always use approved tools and materials. Respect all corresponding laws and
safety regulations. Please refer to your local building code.
CAUTION
When performing duct connections to the furnace supply duct, this duct must be sized to support the additional
airflow produced by the unit. Also, the use of metal duct is highly recommended.
VJ0128
M
ETAL DUCT
M
INIMUM
18"
B
A
VJ0129
A+B =
NOT LESS
THAN
10’