PLAN THE INSTALLATION
TYPES OF TYPICAL INSTALLATIONS
1. Do not use in a cooking area. 2. Two ways to connect ductwork to a factory-shipped unit.
ASSEMBLY INSTRUCTIONS
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”)
1. MOUNT HOUSING TO JOIST OR I-JOIST.
ROOF CAP*
(with built-in
damper)
ROUND
DUCT*
WALL CAP*
(with built-in
damper)
*
Purchase
separately
POWER
CABLE*
INSULATION*
(Place around and
over Fan Housing.)
Seal gaps
around
Housing.
FAN
HOUSING
ROUND
ELBOW(S) *
Seal duct
joints with
tape.
Keep duct
runs short
a. Hold the housing so that it is in contact with the bottom of the joist.
b. Attach the housing with four (4) screws to the joist through the holes in each mounting flange.
OPERATION
To Turn Fan ON
Turn the switch
I
(according to the following “CONNECT ELECTRICAL
WIRING” ) ON.
• Fan will run at the certified airflow rate if the switch
II
is ON.
• Fan will run at the user-adjustable airflow rate if the switch
II
is OFF.
To Use Fan Time Delay Airflow Rate Change
1. Turn the switch
I
ON.
2. Turn the switch
II
ON - fan will run at the certified airflow rate.
3. When the switch
II
is turned OFF, fan will continue to run at the
certified airflow rate until the user-adjustable time delay has elapsed,
(for SA-90DC3, the delay time is user-adjustable from 3-30mins; for
SA-90DC3H SA-90DC3HM, the delay time is 20 mins), and then will
automatically change to the user-adjustable airflow rate.
To Turn Fan OFF
Turn the switch
I
OFF
For SA-90DC3H SA-90DC3HM
Fan run continuously at a low speed (adjustable by low airflow knob)
and automatically boost up to high speed when either of these
conditions is detected: a) Humidity above a user-adjustable setpoint
(30%-80% relative humidity). b) rapid increases in humidity.
After delay timer (20 minutes) returns fan to the default low speed.
Humidity sensor description accroding to “HUMIDITY SENSOR
OPERATION” and “SENSITIVITY ADJUSTMENT”.
When the switch
II
is turned on, the fan will run at high speed. When
the switch
II
is turned OFF, fan will continue to run at the certified
airflow rate until the delay timer (20 minutes) has elapsed, and then will
automatically change to the user-adjustable airflow rate.
For SA-90DC3H SA-90DC3HM
HUMIDITY SENSOR OPERATION
The humidity-sensing fan uses a sophisticated humidity sensor that
responds to: (a) rapid increases in humidity or (b) humidity above a
user-adjustable set-point (30%-80% relative humidity). Fan run
continuously at a pre-set lower level (set by Low airflow knob) and
automatically boost up to 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 80% (Ambient temperature
of 25
℃
)
.
For SA-90DC3H SA-90DC3HM
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 respond-
ing too often to changing environmental conditions, movement toward
minimum, “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 maximum or minimum.
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.
For SA-90DC3HM
MOTION SENSOR OPERATION
Plug the motion sensing grille into the fan control module and when
powered on, the fan will automatically start sensing motion. The fan
will run continuously at the pre-set low speed.
When motion is detected, the fan speed increases to high speed.
When the person exits the area, the fan remains working at high speed
until the delay time has passed 20 minutes.
After the time delay, the fan speed is reduced to the continuous
ventilation rate.
Installation distance: 5 to 7 feet.
Sensing range is within the cone angle of 90°.
5 to 7 feet
Gesture area
sensor 90°
2