Networkable Fan Coil Controller
Specification and Installation Instructions
www.neptronic.com
Page | 7
PCB Drawings
TFL24 Thermostat
3 wire cable (TB1 #1, 2 & 3)
Connect TB1 #6 (A+) & #7 (B-) to EFCB to enable the BACnet service port.
Mode Selection (JP1)
RUN:
Thermostat is in
Operation Mode
.
Thermostat must be set in this mode for
normal system operation. If not locked,
setpoint and control mode can be changed
by the end user.
PGM:
Thermostat is set in
Programming Mode
.
Refer to the following sections for more
details.
TDU Thermostat
3 wire cable (TB1 #1, 2 & 3)
Connect TB1 #6 (A+) & #7 (B-) to EFCB to enable the BACnet service port.
Mode Selection (JP1)
RUN:
Thermostat is in
Operation Mode
.
Thermostat must be set in this mode for
normal system operation. If not locked,
setpoint and control mode can be changed
by the end user.
PGM:
Thermostat is set in
Programming Mode
.
Refer to the following sections for more
details.
Access to Menus
The menu overviews and options are the same for both TFL24 and TDU thermostats. However, the action button or the button used
to access the menus and save changes is different in the thermostats. Use the following menu overviews with the appropriate
action button as per your thermostat.
Action Buttons on Thermostat
Action Button
Task
TFL24
TDU
Press to access the programming menus and save any changes.
Press to return to the previous step without saving.
Mode Selector Jumper
RUN = Operation Mode
PGM = Programming Mode
BACnet
service port
Avoid touching the CO
2
sensor as this may cause
incorrect readings
TB1
1
2
3
4
5
6
7
P
G
M
R
U
N
A
B
C
JP1
Optional: connect
to BACnet network to
enable service port
CO
2
sensor
(TFLG and TFLGH24 only)
A+
DATA
PWR
COM
B-
Connect to EFCB
fan coil controller
Temperature sensor
(all models)
Humidity sensor
(TFLH24 and TFLGH24 only)
PGM
RUN
JP1
PGM
RUN
JP1
Mode Selector Jumper
RUN = Operation Mode
PGM = Programming Mode
BACnet
service port
JP1
PGM
RUN
TB1
Optional: connect
to BACnet network to
enable service port
A+
D
A
T
A
P
W
R
C
O
M
B-
Connect to
EFCB fan coil
controller
1 2
3 4 5 6 7
Temperature sensor (all models)
Humidity sensors (models with humidity )
CO
2
sensor
Avoid touching the CO
2
sensor as this may cause
incorrect readings
PGM
RUN
JP1
PGM
RUN
JP1
