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18
The Partially Dedicated Installation
Defrost air port needs to be drawn from clean
area without combustion appliances. To avoid
backdrafting of combustion products, never
draw
defrost air from a room with a naturally
aspirated
appliance, i.e. furnace, hot water
heater, gas dryer, stove, fire place etc.
WARNING
FIVE PORT MODELS - Partially Dedicated Installation for Models RNC10/RNC20
Weatherhood arrangement - requires a minimum
of 6' (2m) separation and a minimum of 18" (460mm)
clearance above grade or anticipated snow level.
CAUTION
•
Stale air drawn from key areas of home
(bathroom, kitchen, laundry)
•
Fresh air supplied to return air duct of air handler
HRV must be balanced.
Refer to “Airflow Balancing” in this manual.
WARNING
FOUR PORT MODELS
DIRECT CONNECTION of the SUPPLY AIR STREAM to the FURNACE COLD AIR RETURN
(Stale air drawn from key areas of home)
Forced Air
Furnace
Outdoors
* Unit is normally balanced
on HIGH speed
with furnace blower ON.
EXHAUST AIR from various parts of home.
i.e. bathrooms (if required), kitchens (if required).
Cool Air
Return
NOTES:
1. Furnace blower is recommended to operate when HRV is on to provide good air distribution.
2. Weatherhood arrangement is for drawing purposes only. 6' (2 m) minimum separation required.
18" (460 mm) above grade minimum.
3. Due to the differences in pressure between the HRV and the equipment it is being connected to,
the HRV's airflow must be confirmed on site, using the balancing procedure found in
the installation manual.
4. The duct port configuration (Fresh Air from Outside, Stale Air to Outside, etc.) varies from model
to model. Check specifications for the duct configuration on your model.
Return Air
3' (1 m) min .
recommended
Air
Handler
Outdoors
High efficiency filter
or electronic air cleaner
Field-supplied
Balancing Damper
(optional)
Cool Air
Return
Return Air
3' (1 m) min .
recommended
Stale Air To Outside
Fresh Air From Outside
STALE AIR from various parts of home.
i.e. bathrooms (if required), kitchens (if required).
* Unit is normally balanced
on HIGH speed
with furnace blower ON.