Rev. December 19, 2008
Page 5 of 19
2.2.3.1.
Simplified System - Continuous Ventilation & Intermittent Operation
For proper supply air distribution with this system, and to prevent short circuiting in the return air duct,
the furnace fan must run during ventilation mode. Interlock the furnace and HRV in accordance with
Section 3.7.
NOTES
:
1) When selecting an installation option, consideration should be given to the increased electrical
consumption of the furnace fan.
2) The HRV fresh air supply duct to the return air plenum shall be connected at a sufficient distance
upstream of the plenum connection to the furnace. This allows proper mixing and ensures appropriate
air temperature at the furnace heat exchanger in cold weather. For fuel-fired mid and high efficiency
furnaces a minimum temperature of 15.5º C (60º F) is recommended at the heat exchanger. (Check the
furnace manufacturer’s specifications).
2.2.4
Installation Supplies, Standard Issue Items
The HRV comes equipped with:
Filters
Anti-Vibration Straps
Heat Recovery Core
Drain Hose Assembly
Connections for timers, remote controls, furnace interlock
2.2.5.
Control Options (sold separately)
Windsor mechanical control (WIN-1)
Windsor 20 minute timers -up to 6 each system (WIN-20)
2.3.
Ducting to The Outside
Between the weather hoods and the HRV you must use fully insulated ducting with an integrated
vapour
barrier. Insulated ducting with an integrated
vapour
barrier must also be used on all runs
passing through unheated areas. This will avoid condensation problems and energy losses.
The minimum RSI value of insulation should equal that of the local building codes.
2.3.1.
Weather Hood Installation
1.
Insulated flex duct slides over the
galvanized sleeve of the weather hood.
2.
Use sheathing tape (red) to join the inner
duct to the hood's sleeve.
3.
Tape the
vapour
barrier to back of the
hood without compressing the insulation.
Caulk or foam seal around the collars and
hoods to eliminate air and water leaks.
4.
Locate the hoods for easy access to the
bird screen for cleaning purposes.
Make the insulated duct that connects the weather
