HUMIDITY SENSOR OPERATION
The humidity-sensing fan uses a sophisticated humidity sensor that responds to:
(a)
rapid to moderate (user-adjustable) increases in humidity, or
(b)
humidity above a
user-adjustable set-point (50%-100% relative humidity). The fan runs continuously at a
pre-set lower level (set by humidity sensor knob) and automatically boosts up to a certified
airflow rate when environmental conditions change). If the fan continuously responds to changing
environmental conditions,
“H”
(means “humidity”) adjustment may be required. This figure is factory-set
for about 75% (ambient temperature of 77
°
ᶠ/25
°
ᶜ).
SENSITIVITY ADJUSTMENT
The
“H”
has been factory-set for most shower applications. However, if the fan is in a tub area or is
being used for dampness control, the
“H”
may need to be increased toward maximum “+”. If the control
is responding too often to changing environmental conditions, movement toward less “-”,
“H”
may be
required.
To adjust the
“H”
:
1. Disconnect power at service entrance.
2.
Through the grille, locate the slot marked
“H”
.
3.
Carefully rotate the
“H”
adjustment toward “+” or “-”.
4.
Turn on power and check operation by turning on the shower or other humidity source until
the fan turns on.
5.
Repeat above steps if necessary.
When the temperature changes, humidity sensor values will have deviation.
4. PLAN THE INSTALLATION
1.
Do not use in a cooking area.
2.
Two ways to connect duct work to a factory-shipped unit.
TYPES OF TYPICAL INSTALLATIONS
1.
Housing mounted to I-joists (Start at “ASSEMBLY INSTRUCTIONS 1”).
2.
Housing mounted to joists (Start at “ASSEMBLY INSTRUCTIONS 1” ).
3.
Housing mounted to truss (Start at step “ASSEMBLY INSTRUCTIONS 2”).
2
