8
2. INSTALLATION (
CONT
’
D
)
2.6
I
NSTALLING
THE
D
UCTWORK
AND
R
EGISTERS
(
CONT
’
D
)
2.6.3
S
IMPLIFIED
I
NSTALLATION
(
AS
ILLUSTRATED
IN
S
ECTION
1.3)
There are 2 methods for connecting the unit to the furnace/air handler:
Method 1: Supply-return connection
Method 2: Return-return without
Stale air intake:
• Cut an opening into the furnace/air handler return duct not less than 10 feet (3.1 m) from the furnace/air handler (A+B).
• Connect this opening to the
Exhaust air from building
port of the ERV.
Fresh air distribution:
• Same instructions as for Method 1 or Method 2, Section 2.6.2.
For Method 2 (Return-return), make sure there is a distance of at least 3 feet (0.9 m) between the 2 connections to the
furnace/air
handler.
NOTE: For Method 1, it is not essential to synchronize the furnace blower operation with the unit operation, but we recommend it.
WARNING
When performing duct connections, always use approved tools and materials. Respect all corresponding laws and/or
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 ERV. Also, use a steel duct. For a Return-Return installation, the furnace blower must be in
operation when the ERV is in operation.
B
A
VJ0038
B
A
VJ0037
S
TEEL
DUCT
M
INIMUM
18"
(0.5
M
)
A+B=
NOT
LESS
THAN
10' (3.1
M
)
M
INIMUM
3'
(0.9
M
)
A+B=
NOT
LESS
THAN
10' (3.1
M
)
CAUTION
If using Method 2, make sure the furnace/air handler blower operation is synchronized with the unit operation! See
Section 4.
