Troubleshooting - Airia Lifebreath RNC5-ES Guide Du Propriétaire

Troubleshooting

SYMPTOM
Poor airflows
Supply air feels cold
Dehumidistat in not
operating
Humidity levels are too
high condensation is
appearing on the
windows
Humidity levels are too
low
HRV and/or ducts frosting
up
Condensation or ice build
up in insulated duct to
the outside
Excess water in the bot-
tom of the HRV
Excessive vibration
CAUSE
1/4 in (6 mm) mesh on outside

hood is plugged
Filters plugged

Core obstructed

House grills closed or blocked

Dampers are closed if installed

Poor power supply at site

Ductwork is restricting HRV

Improper speed control setting

HRV airflow improperly

balanced
Outdoor temperature

extremely cold
Outdoor temperature is above

o o
15 C (59 F)
Check dehumidistat setting it

may be on OFF
Dehumidistat is set too high

HRV is not sized to handle a

hot tub, indoor pool etc.
Lifestyle of the occupants

Moisture coming into the home

from an unvented or unheated
crawl space
Moisture is remaining in the

washroom and kitchen areas
Condensation seems to form in

the spring and fall
HRV is set at too low a speed

Dehumidistat control set too

low
Blower speed of HRV is too

high
Lifestyle of occupants

HRV airflows may be

improperly balanced
HRV airflows are improperly

balanced
Malfunction of the HRV defrost

system
Incomplete vapor barrier

around insulated duct
A hole or tear in outer duct

covering
Drain pans plugged

Improper connection of HRV's

drain lines
HRV is not level

Drain lines are obstructed

HRV heat exchange core is not

properly installed
Dirt on fan wheels

SOLUTION
Clean exterior hoods or vents

Remove and clean filter

Remove and clean core

Check and open grilles

Open and adjust dampers

Have electrician check supply voltage

Check duct installation

Increase the speed of the HRV

Have contractor balance HRV

Turn down the HRV supply speed

Placement of furniture or closed doors is

restricting the movement of air in the
home
If supply air is ducted into furnace return,

the furnace fan may need to run
continuously to distribute ventilation air
comfortably
Dehumidistat is functioning normally (see

Auto Dehumidistat Disable in this manual)
Set the dehumidistat at the desired

setting
Set dehumidistat lower

Cover pools, hot tubs when they are not

in use
Avoid hanging clothes to dry, storing

wood and venting clothes dryer inside.
Fire wood may have to be moved outside
Vent crawl space and place a vapor

barrier on the floor of the crawl space
On humid days, as the seasons change,

some condensation may appear but the
homes air quality will remain high with
some HRV use
Increase speed of the HRV

Set dehumidistat higher

Decrease HRV blower speed

Humidity may have to be added through

the use of humidifiers
Have contractor balance HRV airflows

Note: minimal frost build-up is expected

on cores before unit initiates defrost cycle
functions
Have HVAC contractor balance the HRV

Tape and seal all joints

Tape any holes or tears made in the outer

duct covering, ensure that the vapor
barrier is completely sealed
Look for obstructions in the drain line

Look for kinks in the drain line

Have a contractor service HRV

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