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You can interlock up to nine fan groups with an inlet. Press the PLUS or MINUS key to change
the Interlock number (one through nine). This menu item limits the fan groups counted when
determining the appropriate position of the inlet (refer to the previous Fan Groups On /
Opening Size Menu). This menu item only allows selection of installed fans whose “Use for
Proportional Control” setting is YES.
Tunnel Fans Groups On \ Opening Size
Input the desired inlet opening size for each potential number of simultaneously operating tunnel fan groups. Fans
are designated as tunnel in the Operating Mode menu (this includes combinations such as tunnel & cool). You can
specify zero (a minimum opening size) through nine fan groups.
Variable speed tunnel fans can be entered in 0.5 increments to account for ramping operating speeds.
TUNNEL INLET GROUP #1 SETTING
Z1-S01
#01 Tunnel Fans ON: 0.0 Open: 0.0
TUNNEL INLET GROUP #1 SETTING
Z1-S01
#02 Tunnel Fans ON: 0.5 Open: 12.0
Sidewall, Tunnel & Ceiling Inlet Settings - continued
TUNNEL INLET GROUP #1 SETTING
Z1-S01
#03 Tunnel Fans ON: 1.0 Open: 24.0
Press the
PLUS
or
MINUS
keys when this menu item is displayed to change the setting number (one through nine).
If there is no “0 Tunnel Fans ON” position, the inlet will NOT open until the fan setting specified by the first ramp
position table entry is reached. The zero position allows the controller to interpolate between zero and the next
specified Fans ON position.
Tunnel Interlock to Fan
This is an extension of the Tunnel Fan Groups On / Opening Size menu item. Instead of opening an inlet based on the
number of fans running, you can interlock specific tunnel fans with inlets (open the inlet based on the number of
interlocked fans running).
TUNNEL INLET GROUP #1 SETTING
Z1-S01
Tunnel Interlock 1 to: Tunnel Fan#1
+
-
or
+
-
or
TUNNEL INLET GROUP #1 SETTING Z1-S01
Cooling Open Sizes are: Proportional
Stepping - the inlet will open to the specified size for each level in the Cooling Fan Groups On settings and will not
move again until the number of fans running reaches the next level. The advantage of the Stepping setting is so the
inlet does not open and close rapidly when a variable speed fan increases and decreases its speed.