Installation; Ventilation Mode; “Make Up Room” & “Do Not Disturb” Buttons; Wall Controller - Smart temp SMT - 131 Manual

Note. Option 16 in the installer menu (See page 11) permits you to set the SMT-131 to reset the
indoor fan to Automatic Mode (cycle on and off with heating and cooling) every time the
thermostat is turned off and then back on.

Ventilation Mode

If permitted by DIP Sw7, (See page 5) the user can run the indoor fan only (Ventilation Mode)
when the SMT-131 is off by tapping the fan button. Each tap of the fan button will cycle between
all available fan speeds.
"Make up Room" & "Do Not Disturb" Buttons
When enabled by DIP Sw8, (See page 5) pressing these buttons will activate relevant LCD
segments and backlight colour on the optional outside door station as well as write data to
Modbus for monitoring by a BAS system.

Installation

System Design
Great effort has been taken to make the SMT-131 system intuitive, reliable and easy to install.
Using a common sense approach to the installation will ensure this product is installed easily and
to the customer's satisfaction. Please read and understand this instruction manual so that
installation, testing and commissioning process is undertaken in an efficient and effective
manner.

Wall Controller

Open the SMT-131 wall controller by placing a flat blade
screwdriver or coin in the slot on the bottom of the thermostat
case and push in gently inwards and twist to release the case
locking clip. Gently pry the two case halves apart at the base taking
care not to twist the case too hard as this may crack the LCD.
Terminal Identification
B Modbus Data "B"
A Modbus Data "A"
0 0-10V Zero Volt Terminal
H 0-10V Heat Output
C 0-10V Cool Output
- 24V Common
+ 24V Active
W Heat (Or Reversing Valve)
Y Cool (Or Compressor)
3 Fan – High Speed
2 Fan – Medium Speed
1 Fan – Low Speed
D-
D+
S-
S+
Page 4
Digital Input 0 Volt
Digital Input Active
Sensor Input 0 Volt
Sensor Input Active