Greenheck Melink IH3 Operations - Manual (Page 11)

VIII. Methods of Turning Fans On/Off
It is important to understand that there are several methods by which the fans can turn on and
off (change from STANDBY to ENERGY SAVING MODE). Depending on the installation, different
methods may be used. In various installations, some methods are disabled. Refer to the installation
documents of the individual installation to understand how a particular installation is setup. Refer to
the Intelli‐Hood Technical Guide for programming information for how to change the features and
sequence of operations.
Fans Button
In most Intelli‐Hood installations, the kitchen staff person will use the Fans Button to turn the
fans on/off. However, sometime, the keypad is disabled and the Fans Button will have no funtion.
There will be other methods to turn the fans on/off. Refer to the other possible methods described
below.
If there are multipe user interface devices on an Intelli‐Hood system, then relationships are be
setup in programming parameters such that Keypad A controls some hoods while Keypad B controls
other hoods. Refer to a the Technical Manual for more information regarding system programming.
Auto On/Off by Hood Temperature
The Intelli‐Hood system can be programmed to turn on automatically by hood temperature.
When the temperature in the hood reaches a certain threshold (100F), the fans will turn on. In most
kitchens, several exhaust fans share a common supply fan. In these kitchens, if one hood triggers its fan
to turn on, then the other exhaust fans and the supply fan must turn on as well. In other kitchens,
exhaust fans may be able to turn on independently of one another.
Auto‐Off is a separate function from Auto‐On. The system can be programmed such that if a
hood is below a setpoint temperature (75F), then the exhaust fan will shut off. Similar to the Auto‐On
function, hoods that share the supply fan cannot turn off independently of one another. Therefore, all
hoods associated to a common supply fan must be below the setpoint temperature before any of them
turn off automatically.
Remote Input by Toggle Switch
Intelli‐Hood can be programmed to turn the fans on/off based on the state of an external toggle
switch, such as a traditional wall or hood mounted switch. This setup is common in retrofit projects
where Intelli‐Hood is being installed after the kitchen has been in use for many years. The existing
kitchen staff may not want to change the method of turning fans on/off. Intelli‐Hood can be setup to
accept a signal from the existing toggle switch.
Remote Input by Special Hood Feature such as Water Wash, Ultraviolet Light System, Hood Damper
System
Some exhaust hood systems have sophisticated control panels that may control Water Wash,
UV Lights, or Hood Damper Systems. These systems have their own electronic sequence of operation
for processes that must be performed before the exhaust fans are turned on. When Intelli‐Hood is