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3. INSTALLATION (
3.5 I
D
NSTALLING THE
UCTWORK AND THE
3.5.3 S
I
IMPLIFIED
NSTALLATION
When performing duct connection to the furnace, installation must be done in accordance with all applicable
codes and standards. Please refer to your local building code.
When performing duct connection to the furnace ducts (Method 1), these ducts must be sized to support the
additional airflow produced by the ERV/HRV. Also, the supply duct must be a metal duct. It is recommended that
the ERV/HRV is running when the furnace is in operation in order to prevent backdrafting inside ERV/HRV.
There are two methods (illustrated below) for connecting the unit to the furnace ducts:
M
1: R
-S
ETHOD
ETURN
UPPLY
M
ETAL DUCT
VJ0086
S
:
TALE AIR INTAKE
• Cut an opening into the furnace return duct not less than 10 feet from the furnace.
• Connect this opening to the stale air intake port of the HRV/ERV (as shown above).
F
RESH AIR DISTRIBUTION
Same instructions as for Method 1 or Method 2, section 3.5.2 in previous page)
If using Method 2, make sure the furnace blower operation is synchronized with the unit operation! See Section 5.
For Method 2 (Return-Return), make sure there is a distance of at least 3 feet between the 2 connections to the furnace duct.
NOTE: For Method 1, it is not essential to synchronize the furnace blower operation with the HRV/ERV operation, but we
recommend it.
'
)
CONT
D
R
EGISTERS
(
S
AS ILLUSTRATED IN
ECTION
M
INIMUM
18''
A
B
A+B=
NOT LESS
10'
THAN
:
(
'
)
CONT
D
2.3)
!
WARNING
CAUTION
VJ0087
CAUTION
10
M
2: R
-R
ETHOD
ETURN
ETURN
A
M
A+B=
INIMUM
3'
B
NOT LESS
10'
THAN
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