aldes H/E240 - Page 41

Residential HRV/ERV
41
Indoor air is too
humid and/or
condensation
is forming on
the inside of
windows
• Dehumidistat is set
too high
• Obstructed supply or
exhaust grilles
• Not enough exhaust
capacity near source
of moisture
• HRV operang speed is
too low
• Decrease the setpoint of the
dehumidistat.
• Reduce sources of indoor
humidity (steam, wet
clothes, plants, rewood)
and excessive temperature
• Operate HRV at high
speed or use connuous
venlaon (not intermient
or ECO modes).
Frost is forming
on the HRV
and/or ducts
connected to
the HRV
• HRV is not balanced
• HRV automac defrost
funcon is not working
• Leaky vapour barrier
around insulated duct
• Hole in exible duct
• Tape and seal all joints and
duct connecons
• Repair any holes in exible
duct
• Call contractor to balance
the HRV and verify defrost
funconality
Water is
accumulating
in the bottom of
the HRV
• Obstructed drain line
or drainage pan.
• Improper connecon
of drain
• HRV is not level
• Remove obstrucons or
kinks in the drainage tube
• Open HRV and check for
material blocking the
drainage holes.
• Adjust the mounng chains
or bracket so that the HRV
is level
HRV stays in
high speed after
the 20/40/60
minute
timer cycle is
complete
• One or more
extracon ZRT
dampers remains open
• Timer in another
bathroom is sll acve
• Dehumidistat detected
excess humidity while
mer was on
• Automac defrost
cycle is running based
on cold outdoor
temperature
• Check if wall control is
set to a high speed mode
(dehumidistat, high-
occupancy, etc...)
• Check the bathroom
exhaust terminals to ensure
that the dampers are fully
closed.
• Wait a maximum of 30
minutes for defrost cycle to
complete.