13
4.1.3 Choosing the right settings
Mode:
• Unit is factory set in Standby mode and should be set to the appropriate mode according to local building codes as well as
the fl oor area of the residence, number of inhabitants and local weather conditions.
RH Limit:
• Unit is factory set to "N" and should normally remain in this setting unless local conditions require otherwise.
4.3 Booting Sequence
When unit is powered on, it will go through a booting sequence during which it will test its components. The booting sequence
will last less than a minute, after which the LED light will blink if there is a problem. If a Broan VB20W 20-minute push-button
control is connected to the unit, it will also blink. The speed of the blinking indicates the nature of the issue:
See the Troubleshooting section of this guide for detailed troubleshooting instructions.
4.2 Prepare the Unit
• Make sure that the protective cardboard is removed from the door, if applicable.
• Verify damper orientation (see section 3.1.2).
Slow blinking: RH and temperature sensor problem
Fast blinking: motor problem
4 Getting the Unit Started
4.1 Unit Settings
• Settings should be changed by the installer after all construction work is over in order to comply to local building codes.
Should the user want to change the settings later on, it should be done by an authorized servicer.
• Unit should never run while the building is still under construction.
• All units are factory set to Standby Mode, with the RH Limit set to the N position.
• See section 3.3.2 for specifi c details regarding winter operation.
4.1.1 Settings description
4.1.2 Mode and RH Adjustable Controls Location
VD0395
Factory settings
MODE
RH L
IMIT
P
OSITION
D
ESCRIPTION
OFF
Relative humidity limit is deactivated.
+
Higher relative humidity limit.
N
Factory set relative humidity limit.
-
Lower relative humidity limit.
P
OSITION
M
ODE
D
ESCRIPTION
SB
Standby
Unit is off.
Unit can be activated in high speed by the
VB20W 20-minute push-button control, if applicable.
INT
Intermittent Unit works 20 minutes per hour in low speed.
Unit can be activated in high speed by the
VB20W 20-minute push-button control, if applicable.
1
Low Speed
Unit runs at 65 cfm.
Unit can be activated in high speed by the
VB20W 20-minute push-button control, if applicable.
2
High Speed Unit runs at 105 cfm.
Unit can be activated in high speed by the
VB20W 20-minute push-button control, if unit is
deactivated by RH limit.
Remove the
door to access
the MODE and
RH adjustable
controls.
