23
Installation Methods - Simplified (Return/Return)
The simplified method draws stale air from the cold air re
-
turn duct of the air handler/furnace and introduces an equal
amount of fresh air farther downstream into the cold air re-
turn as illustrated in the following figures.
Key Points
The ERV/HRV unit must be balanced.
• It is mandatory (to eliminate recirculation) that either the
furnace blower run continuously or ERV/HRV unit oper-
ation be interlocked with the furnace blower.
•
The duct configuration may change depending on the
ERV/HRV model. See specifications for your unit.
• Check local codes and authority having jurisdiction for
acceptance.
Figure 18.
Simplified Installation (Return/Return)
Installation Notes
See unit specifications for exact port locations.
Unit is normally balanced on HIGH speed with the furnace blower ON.
A minimum separation of 40” (one meter) is recommended between the two direct connections.
The exhaust air connection should be upstream of the supply air connection to prevent exhausting any fresh air.
Weatherhood arrangement is for drawing purposes only. The weatherhoods are to be installed in accordance with local building
The airflow must be confirmed on site using the balancing procedures found in this manual.
Forced Air
Furnace
Cool Air
Return
36"
(914mm) Min.
Recommended
Dampers for
Balancing
Airflows
40" (1 m)
Minimum
Outdoors
Return
Air
Return Air
Leaf Hinge
Install the Backdraft Damper with the leaf hinge vertical.
The
5" (127 mm) Backdraft Damper (Y3728)
6" (152 mm) Backdraft Damper (Y3727)
Spring−Loaded
Backdraft
Damper
codes or manufacturer recommendations.
Figure 19.
Simplified Installation (Return/Return)
Summary of Contents for ERV5-130
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