Smart Temp SMT-310 User Manual

TM

Operating Instructions

Smart Temp

Thermostats

24 Volt Multistage Heat / Cool & Heat Pump thermostat

1 Speed “Smart Fan” Fan Control

Auto Changeover - 7 day Start Stop Programmable

Congratulations on the purchase of your new

Electronic Thermostat!

Your new Smart Temp SMT - 310 thermostat has been built using the best

components and design philosophy. As a consequence of this, if properly

installed your new electronic programmable thermostat will provide you with

many years of trouble free and reliable service.

The Smart Temp SMT has been designed to be attractive, highly reliably and

simple to use. Please take the time to read these simple instruction to

familiarise yourself with the function and features offered in this product.

SMT-310

Slimline Thermostat

To turn the System On & Off

Tap the On/Off button to turn the SMT 310 on, Press and hold the On/Off
button for 5 seconds to turn the SMT 310 off. The LCD will Show the word
“ON” or “OFF” to reflect the current mode. When OFF, there will be no heating
or cooling system control regardless of the room temperature. When On the
SMT 310 will run its pre set schedules as described below.

When ON, the SMT 310 will control your room temperature to your desired set
points only while displaying the word “START” in the LCD. When the word
“STOP” is shown there the thermostat will not control the Air conditioning
system regardless of the room temperature.

Setting The Desired Temperature

When ever you Tap the Temp “+” or Temp “-” buttons the SMT will LCD will
flash and show the word “COOL” and the current “COOLING” Set temperature
(the value you wish the cooling to commence at). This value can be adjusted
with the Temp “+” and Temp “-” button. After a few seconds the SMT display
will change and show the word “HEAT” and the current Heating Set
temperature (the value you wish the heating to commence at). This value can
be adjusted with the Temp “+” and Temp “-” button. After a few seconds the
LCD will stop flashing. Your heating and cooling values are now set .

C

Programming your SMT Automatic Start

22

We

AM

01:00

Clock

Select

On/Off

“-” buttons to adjust the necessary Start & Stop times for the 7 days.

Setting the Clock

Step 1: Press the “Prog” button once and the display will change as in Diag

1. The word “CLOCK” will show (to indicate that we are now setting the real
time clock to the current time and day). The hour will be flashing to indicate
that this value can be adjusted if necessary by using the “+” & “-” buttons. Set
the hours value to the correct time.

Step 2: Press the “Prog” button again and now the minutes display will flash
indicating that if necessary the minutes value can be adjusted by using the “+”
& “-” buttons. Set the minutes value to the correct time.

Step 3: Press the “Prog” button again and now the Day display will flash
indicating that if necessary the current Day can be adjusted with the “+” & “-”
buttons. Set the Day value.

The Real time clock was just set using just 3 buttons. The “Prog” button to

advance us through the programming process, and the Temp “+” and Temp “-”

Prog

Diag 1

Note: Your SMT thermostat will automatically resume normal function if there
are no buttons pressed for approximately 30 seconds. It is recommended that

once you start to programme your SMT that you do not pause or you may

have to commence the programming procedure from the beginning.

buttons to adjust the value that was flashing to a new value.

Programming the SMT to automatically adjust the Start & Stop time is as

equally a simple process. Simply press the “Prog” button to select the

value that requires adjustment (if necessary) and then the “+” & “-”

& Stop times

Your SMT-310 thermostat will automatically turn the

+

heating and cooling system On & Off at the times you

-

require and control the room temperature to your
previously set comfort levels.
Programming the SMT “Start” and “Stop” times is an
extremely simple process and requires the use of the
“Prog” button (used to start the Programming process and
advance through the various steps) and the Temp “+” and

buttons to adjust flashing digit to the desired value.

Setting the Program

Step 1: If you have not just set the clock or do not need to set the clock - press

the “Prog” button 3 times to move past the “Clock” set section of the
programming procedure (Being the Hours, minutes and day
adjustments).

Step 2: The SMT display will be as shown in Diag 2 indicating
that this “Start” Hour adjustment for Monday (as indicated by the
Hour segments flashing) as well as the Mo (Monday) display
being shown. Pressing the “+” or “-” button adjust the hours that
you wish the Monday Start time to commence.

Step 3: Press the “Prog” button again and now the Minutes

Mo

7:30

START

Diag 2

AM

segments will be flashing, indicating this is the adjustment for
minutes for the “Start” program for Mo (Monday). By pressing the
“+” or “-” button adjust the minutes to time that you wish the
“Start” time to commence.

Step 4: Again pressing the “Prog” button will advance you to,
setting the “Stop” time Hours for MO (Monday). That is, the time

Mo

5:00

STOP

PM

you wish the Air Conditioning System to shut down on Monday.
Again, by using the “+” & “-” buttons this value can be set.

Diag 3

Step 5: Pressing the “Prog” button again, the SMT will permit adjustment for

the Monday “STOP” Minutes Adjustment of this value is done with the “+” or “-”
buttons - Diag 4.

The remainder of the programming
process is completed by simply

repeating this
procedure, pressing
the “Prog” button to
advances you through

Mo

5:30

STOP

Hours & Minutes for
Tuesday “Start, then,

PM

Hours & minutes for

Tuesdays “STOP” etc.

Diag 4

Time

Display

Program
Indicator

Room & Set
Temperature

Display

Thermostat

ON / OFF

Button

Thermostat

Indication

22

Su Mo Tu We Th Fr Sa

AM

PM

10:22

Clock

START STOP

Select

On/Off

Thermostat

Mode Select

Button

Status

C

Set

ON
OFF

Heat
Cool
Auto
Fan

Prog

+

-

Program

Button

Mode

Indication

Temperature

Up Button

Temperature

Down Button

Auto or Cont

Fan Status

Display

Specifications

Control Range: 5° to 30°c.
Set points: 1 heat 1 Cool
Override Time: 2 hours (Fixed)
Resolution: 1.0°c
Program Type: Individual - 7 day start / stop
Default Program: Mon ~ Fri Start 8:00am Stop 6:00pm.

Temp Cont Limits: Adjustable (Default Cool 5 - Heat 30 )
Fan Control: Smart Fan* or Auto fan
Back light: Electro luminescent (5 sec)
Accuracy: 0.3°c
Calibration: +/- 3
Max Load rating: 3 Amps.
Load per relay: 1 Amp resistive @ 24v.(40v max)
Memory Backup: 14 hours
Voltage: 24VAC +/- 20%.
Connectors: Screw type.
Material: PC/ABS
Size: 80 x 90 x 22mm
Weight: 145g
Warranty: 1 years RTB

*Smart Fan runs the fan continuously between the “Start” & “Stop” programs

Sat ~ Sun Start 8:00am - Stop 8:00am (off)

°c (Default 0°c)

°c

Understanding the Mode of Operation

Advanced Functions

Your SMT thermostat will automatically control your Heating system,

your cooling system and the fan for the heating and cooling system.

Most users will prefer to let the SMT operate fully automatically, switching
between heating and cooling modes to maintain the comfort levels you
have previously set. Some uses however may wish to manually switch
between heating and cooling modes.

By using the “Select” button, the various operational modes such as
Heating only or Cooling only or Auto mod can be simply adjusted.

The various modes are described below

To Adjust the Set (or desired) Room Temperature

When no buttons are pressed, the LCD indicates the current room
temperature. When the up (+) or down (-) buttons is first pressed the LCD
will flash rapidly and indicate the Set (or desired) room temperature. The
word “SET” will also be displayed in the LCD to confirm the set temperature
is being adjusted.

Heat Only Mode: In heat mode, the thermostat will only activate
the system heating when the room temperature falls below the
set (or desired) room temperature. Heat will be displayed in the
LCD to indicate this mode is set. When the SMT is calling for the
system to heat, the word “HEAT” will flash slowly in the LCD. In
this mode, the SMT will not turn on the cooling system regardless
of how warm the room becomes.

Cool Only Mode: In cool mode the thermostat will only activate
the system cooling when the room temperature raises above the
set (or desired) temperature. Cool will be displayed in the LCD.
When the SMT is calling for the system to cool, the word “COOL”
will flash slowly in the LCD. In this mode, the SMT will not turn on
the heating system regardless of how cool the room becomes.

Auto Season Change over Mode: In Auto mode the thermostat
will automatically activate the system heating or cooling to
maintain the set (or desired) heating and cooling temperatures.
The LCD will indicate Auto Season Mode by displaying both
“Heat & Cool” in the LCD. When the SMT is calling for the system
to heat or cool the appropriate word will flash slowly in the LCD.

Fan only Mode: In fan only mode the SMT will only run the
system fan regardless of the set and room temperature. The SMT
will not attempt to control the Air Conditioning System heating or
cooling functions.
Fan only mode is typically used to improve building ventilation
and not to control room temperature.

Continuous Fan Mode

In Continuous Fan mode the system fan will run continiosly when
the Start time has been reached, and remain running until the
Stop time is reached. Unlike the Fan Only mode described above
the SMT will also control the room temperature as dictated by the
Heating, Cooling or Auto modes set above. The SMT will indicate
that this mode is active by displaying the word “Fan” in the LCD.

Auto Fan Mode

In Auto Fan mode the SMT will only turn on the system fan on
when there is a call for system heating or cooling and off again
when the room is at the desired temperature. The LCD will
indicate that this mode is active by displaying the words “Auto
Fan” in the LCD.

Setting the Mode of Operation

Like the programming steps previously explained, adjusting the various

operational modes are accomplished equally as simply and with a minimum

of button presses.

Step 1: Pressing the “Select Button” once will enter the

mode selection menu. The LCD will look similar that shown

in Diag 5.

Pressing the “+” or “-” buttons will permit you to toggle

between Fan only mode, cool only mode, Heat only mode

or Auto Mode ( Heat/Cool Displayed).

Step 2: Pressing the “Select Button” again will permit you

to select either Fan or Auto Fan modes with the “+” & “-”

buttons. Diag 6 shows a typical LCD.

Pressing the “select” button again returns the SMT to

normal mode. The new settings will now take effect.

22

23

Diag 5

Cool
Heat

Auto

Fan

C

C

After Hours 2 Hour Timer

The SMT-310 has an inbuilt after hours timer fitted, tapping the On/Off button
will activate the 2 Hour after hours run on time period.

When the timer is active, the word “STOP” will slowly flash in the LCD to

indicate this function is set.

Key Board Lock

Your SMT-310 has the ability to lock the keyboard from un authorised
tampering. Pressing and holding the mode button for 15~20 seconds will result
in the SMT LCD to show the word “UNLOC”. Continuing to hold the mode
button will change this to read “LOC”. At this stage the thermostat key board
will be locked ( EXCEPT the ability to activate run on timer).

To unlock repeat this process.

Manual Mode

Pressing and Holding the PROG button for 20 seconds will toggle the SMT-310
between Programmable mode (as previously described) and Manual Mode

(No time clock control)

Advanced Installer Functions

The SMT-310 also has a number of software options that can be set by
accessing the installer menu. To enter the installer menu set the HEATING
temperature to 10c and then press and hold the select button for 10 seconds.

Temperature Control limits

Once in the installer menu the LCD will change and show the word “COOL”
and a number, such as “COOL 05” (default). This is a control value that
overrides the user set temperature and is the lowest temperature the
thermostat will control too. Adjust this value if necessary with the temp + or -

buttons. Tap the select button and now the LCD will change and display the
word “HEAT” and a number, such as “HEAT 30 (default). This is a control value
that overrides the user set temperature and is the Highest temperature the
thermostat will control too. Adjust this value if neccessary with the temp + or ­buttons.

(For example, by setting a COOL value of 19, and a HEAT value of 24 regardless of

where the user sets there preferred heating and cooling set temperatures, the SMT
will limit the control range of the Air Conditioning system to between 19 & 24c).

Tap the select button again to move to the next option.

Calibration Offset

Once you have set the temperature control limits above (if required), the next

option permits the adjustment (calibration) of the temperature sensor. The LCD
will show “OFFS 0” (default). This value can be adjusted +/- 3c. Permitting you
to add or subtract up to 6 deg from the temperature sensor.

Tap the select button to exit this menu.

Wiring Diagrams and Dip Switch Configuration

NOTE: Black Denotes Switch Position.

Switches shown in grey do not apply to the function described

Heat Cool Connection

24Vac
Supply

Remote

Cool 1

Cool 2

Fan

Sensor

Y2

TTT

GGY1

Link must be installed for 24V Switching

Heat 2

Heat 1

W2W2C

W1

Neutral

R

Active

Com

On

1 2 3 4 5 6

Relay Common

On

1 2 3 4 5 6

Gas Heat

Fan On by Plenum

Sw 2 OFF - Sw 3 ON

Electric Heat
Fan On with Heat Call
Sw 2 OFF - Sw 3 OFF

Heat Pump Connection

On

24Vac
Supply

Remote

Compressor 1

Compressor 2

Fan

Sensor

Y2

Y1

Link must be installed for 24V Switching

T

Auxiliary Heat

Reversing Valve

Neutral

C

R

B/O

Active

Com

Relay Common

1 2 3 4 5 6

On

1 2 3 4 5 6

Sensor Configuration

Internal Temp Sensor

Sw 1 & 6 On - Sw5 Off

On

1 2 3 4 5 6

Remote Temp Sensor

Sw 1 & 6 Off -Sw 5 On

On On

1 2 3 4 5 6 1 2 3 4 5 6

Smart Temp Australia Pty Ltd

19 Indra Road Blackburn South 3130 Phone:[phone] Fax [phone]

www.thermostat.com.au

Reversing Valve

In Cooling

Sw 2 ON - Sw 3 OFF

Reversing Valve

In Heating

Sw 2 ON - Sw 3 ON

3 Min Comp Delay

Sw4 OFF = Delay On
Sw4 On = Delay OFF

REV0705PS

Diag 6

Due to continual product improvement, these specifications are subject to change without notice