Partially Dedicated System - SystemAir Fantech FLEX 100H VHR70R Manuel D'installation

6
INSTALLATION EXAMPLES (CONT'D)
DIRECT CONNECTION of the FRESH air to living area to the RETURN PLENUM
of the AIR HANDLER (Stale air drawn from key areas of home)
PARTIALLY DEDICATED SYSTEM (BETTER)
1. In order to provide proper distribution of the fresh air, it is recommended that
the furnace blower be set to run continuously or interconnected with HRV.
2. Stale air is drawn from key areas of the home (bathroom, kitchen, laundry
room).
3. Fresh air is supplied to the return air plenum of the furnace.
4. Due to the difference in pressure between the HRV and the equipment it is
being connected to the HRV's airflow must be balanced on site, using the
procedure found in the section "AIRFLOW BALANCING"
HRV/ Furnace ducting for Partially Dedicated System
Outside
Stale air to
outside
Fresh air from
outside
* Unit airflow should be balanced while HRV is on
"Normal" speed and furnace blower is running.
Suggested installation for:
• Central furnace (air
• When ducting fresh
Benefits: Conditions the
fresh air prior to
distributing it throughout
the house
Stale air from inside
Fresh air
to living
areas
1 m (3' 3")
min.
recommended
Return
plenum
handling unit or central
air conditioners)
air to living area is not
possible or practical,
i.e. expensive or when
the central AHU will
operate year-round.
Make sure the HRV is
capable of meeting the
required airflow rate.