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Preface
The new SMT-
920 “Viking” HVAC controller
has been built by Smart Temp Australia using the best
components and design philosophy currently available. As a result, the Smart Temp SMT-920
“Viking”
will provide your clients with many years of trouble free comfort control.
It is highly recommended that you take the time to read and understand these simple instructions
so that you can take full advantage of the many functions and capabilities that are offered in this
premium product.
The SMT-
920 “Viking” product is under constant revision, upgrade and enhancement to meet the
new needs of the market. A table below provides a revision history of the manual
–
which in most
cases reflects product improvement.
Manual Revision History
Ver. 1
First Release.
Ver. 1.01
Some minor spelling and diagram errors corrected.
Ver. 2.0
Version II Hardware. Improved “Smart Sensor” hardware. Added BACnet MS
-TP
communications. Improved AO functions. Added service Menu. Added Night purge.
Removed Modbus point data from manual
–
(separate communications manual provided).
Ver. 2.5
Removed outside air temperature sensor input. (outside temp only measured with Smart
Sensor) Added 0-10V input for IAQ function. Changed economy settings to better support
enthalpy control. Compressor call now suspends outside air function. Minor bug fixes and
performance enhancements.
Ver. 2.6
Some wording changes in the manual. Small spelling and diagram errors corrected. Stage down
for 4 compressor systems improved.
Ver. 2.7
Added hi / low temperature alarm function. Added PI control. Improved DST setting. Fixed night
purge bug. Increased holiday events to 30. Other minor enhancements and improvements.
Ver. 2.8
Additional wording and function description corrections. Added support for version II of the
Smart sensor with Display.
Ver. 2.9
Fixed bug that can cause loss of Smart sensor communication with change in communications
baud rate. Added Humidity Set point, added Hi/Low select function, added communications
parity select, added H, C & H&C output on aux relay menu, added basic/advanced mode in
installer menu layout, improved AH button logic, improved economy indication, clarified
information in the manual.
Ver 2.91
Minor spelling and manual layout changes
Ver 3.0
Updated Viking front label. Graphics in this manual to match.
Ver 3.1
Added “Master” function to Auxiliary relay functions
(ver 2.95 firmware).
Removed BACnet
Great care has been taken in the preparation of this manual. Smart Temp Australia P/L takes no
responsibility for errors or omissions contained in this document. It is the responsibility of the
user to ensure this controller or equipment connected to it is operating to their respective
specifications and in a safe manner.
Due to ongoing product improvement Smart Temp Australia P/L reserves the right to change
the specifications of the SMT-
920 “Viking”
(or its components) without notice.
All rights reserved. © Smart Temp Australia P/L 2015.
Intellectual rights apply.
