Rev 6.1 November 1, 2016
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setpoint, it will trigger high speed in the ventilator. The unit will run in high speed until the ambient air
returns to the setpoint RH. Your ventilator is not a dehumidifier, however ventilating can have a
dehumidifying effect by simply removing high RH air from the space, particularly during cooler/cold
seasons when outdoor humidity is typically lower than indoor humidity. Typical dehumidistat settings
are as follows:
Winter Operation
– 40% - 60%. Lower settings may be necessary in colder zones to keep windows
free of condensation. If you notice the air is uncomfortably dry in winter, you might set humidity to a
higher level or choose an operation mode above which operates the ventilator less or for shorter periods.
Spring/Fall Operation
- 50% - 60%.
Summer Operation
– For air conditioned homes run the HRV as recommended for winter operation,
i.e. continuous low speed or use a 20/40 setting. In homes without air conditioning, there is no need to
run the HRV during the day when windows are open. If the HRV is connected to the bathrooms(s) or
kitchen, use the standby setting. The typical dehumidistat summer setting is 65%-80% or OFF.
Note:
For dial-type dehumidistats, moving the dial to
ON
locks unit in high speed; moving the dial to
OFF
prevents ambient humidity from triggering high speed (i.e. turns “off” humidity sensing).
2.
INSTALLATION
Installation Supplies, Standard Issue Items
The HRV comes equipped with:
▪
Filters
▪
Anti-Vibration Straps
▪
Heat Recovery Core
▪
Drain Hose Assembly
▪
Balancing dampers are NOT REQUIRED. ES Series HRVs from Nu-Air are equipped with a
system which allows the installer to adjust each motor in both high and low speed.
▪
Removable terminal blocks for timers, remote controls, furnace interlock. A 4-wire terminal
block for 12 VDC ES Series controls and a 10-wire terminal block for 24 V controls are provided
with the unit. To use these, gently remove the block from the HRV, fit the wire into place and secure
it in its trap, using a fine-tipped flat-headed screwdriver.
Installer's Responsibilities
Installers are responsible for the performance of the ventilation system and for ensuring that all codes
and standards are met.
▪
Do not mount the fresh air supply near a source of contaminated air such as automotive exhaust, gas
or propane exhaust, garbage containers or oil tanks.
▪
Do not connect a dryer exhaust to an HRV.
▪
Combustion appliances such as furnaces and hot water heaters must not draw combustion air directly
from an HRV.
▪
Do not connect a kitchen range hood to any part of this system.
▪
Do not install in attics or other unconditioned spaces (min. 16º C, 61º F).
▪
Do not install in enclosed garages.
▪
Try to maintain straight duct runs as much as possible, using as few joint fittings as possible.
▪
Keep use of flexible ducting to a minimum.
▪
Be sure to observe local codes regarding running and insulating ducts in unconditioned spaces.
Poorly insulated ducts run in unconditioned spaces will hamper the efficiency of the HRV.
