Partially Dedicated System - Fantech 405335 Installation Manual

INSTALLATION ExAMPLES (CONT'D)
DIRECT CONNECTION of the SUPPLY AIR STREAM 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 recommend-
ed 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, laun-
dry room). (see page 15)
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
6
Fresh air from
outside
* Unit airflow should be balanced while HRV is on
"High" speed and furnace blower is running.
Suggested installation for:
- Central furnace (air handling unit or central
air conditioners)
- When ducting fresh air to living area is not
possible or practical, i.e. expensive or when
the central AHU will operate year-round.
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
Make sure the HRV is
capable of meeting the
required airflow rate.