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1. D
EFROSTING
. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
2.3 O
3.1 Q
M
4. T
R
P
EPLACEMENT
In order to ensure your ventilation unit remains in good working condition, you must
use Broan-NuTone LLC genuine replacement parts only. The Broan-NuTone LLC
genuine replacement parts are specially designed for each unit and are manufactured
to comply with all the applicable certification standards and maintain a high standard of
safety. Any third party replacement part used may cause serious damage and drastically
reduce the performance level of your unit, which will result in premature failing. Also,
Broan-NuTone LLC recommends to contact a Broan-NuTone LLC certified service depot
for all replacement parts and repairs.
1. D
EFROSTING
When the outside temperature is below 23°F, recovery of heat or energy creates
frost in the core.
To maintain its proper operation, the unit is programmed to defrost the recovery
core. The defrost frequency varies according to the outside temperature.
During the defrost cycle, the unit shifts to maximum speed and the dampers close.
After defrosting, the unit returns to the operating mode selected by the user.
T
ABLE OF
. . . . . . . . . . . . . . . . . . . . . . . 3
C
. . . . . . . . . . . . . . . . . . . . . . . . 4
. . . . . . . . . . . . . . . . . . . . . . . . . 4
M
A
UXILIARY
. . . . . . . . . . . . . . . . . . . . . . . . . 5-7
M
. . . . . . . . . . . . . . . . . . . . . . . . 7
. . . . . . . . . . . . . . . . . . . . . . . . 8
R
ARTS AND
EPAIR
M
ODE
C
ONTENTS
C
. . . . . . . . . . . . . . . . . . . . . . 6-7
3
. . . . . . . . . . . . . . . 5
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