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EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE  
 
 EN2B-0285GE51 
R0909 
15
Excel 10 Wall Module Options 
A typical FCU installation will include an Excel 10 wall module 
containing a 20k ohm NTC room temperature sensor and 
additional features depending on the wall module type (see 
Excel 10 wall module literature for further information). 
 
Excel 10 FCU Controllers can use a return air sensor rather 
than the sensor in the wall module if it is wired to the wall 
module sensor input. Setpoint adjustments can be configured 
as relative or absolute, and upper and lower limits can be set. 
A configuration option for the fan speed switch allows it to be 
disabled if not required. The bypass button can be configured 
to override the control mode to "occupied" for a configurable 
bypass time and to override the control mode to "unoccupied" 
for an indefinite time, or it may be configured to only override 
to "occupied". The button may also be used to cancel the 
override. 
 
Common Temperature Control (Master/Slave Controllers) 
When one or more Excel 10 FCU Controllers serve a 
common area and a single temperature sensor is to be used, 
a master/slave arrangement can be configured. One Excel 10 
FCU Controller is configured for the local wall module with the 
desired options. The other Excel 10 FCU Controller(s) will be 
configured without wall modules and with certain network 
variables bound with the master controller. Refer to 
Application Step 6 of this document for more details. 
 
IMPORTANT 
The slave units must have the same HVAC 
equipment connected to it as the master units. 
 
The slave units will not use any internal temperature 
setpoints or control algorithms. The master controller 
determines heating/cooling output based upon 
setpoints and occupancy and L
ON
W
ORKS
 network 
command mode status and communicates this to the 
slave via the L
ON
W
ORKS
 network.