ASSEMBLY INSTRUCTIONS
OPERATION
PLAN THE INSTALLATION
1. Before installation, you need to know:
ST4.2*13mm
Screw A
Screw B
Hanger bar
ST4.2*25mm
13 3/8 in. (340mm)
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
Hole A
Hole B
Hole A
Hole B
Channel
When installing contractor packs (if available), make sure to install any optional
such as lighted grille plugs with the fan housing to ensure wiring is completed
properly. Module and grille plugs come packaged with the optional accessory and
must be installed with the fan housing.
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 time delay has elapsed (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
Fan runs 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 according to “HUMIDITY SENSOR OPERATION” and “SENSITIVITY ADJUSTMENT”.
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 runs continuously at a pre-set lower level (set by Low airflow knob) and automatically boosts up to the
certified airflow rate when environmental conditions change. If the fan continuously responds to changing environmental conditions, “H” (means
“humidity”) adjustment may- be required.
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 maximum, “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.
1. Do not install fan above or inside a 45-degree angle projected outwards from the cooking equipment element closest to the fan.
See instruction sheet for clarification.
2. Two ways to connect ductwork to a factory-shipped unit.
2
