Smart temp Viking SMT-920 User& Installer'S Manual Download Page 1 | Manualshive

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SMT-920

Viking

Commercial multistage HVAC controller

User & Installer Manual

Ver 3.1

(Firmware 2.95+)

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Summary of Contents for Viking SMT-920

Page 1: ...SMT 920 Viking Commercial multistage HVAC controller User Installer Manual Ver 3 1 Firmware 2 95...

Page 2: ...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 nigh...

Page 3: ...est Mode 6 Typical Wiring Diagrams 6 0 10V Wiring 9 Sensor Wiring 9 Ancillary Input wiring 12 Setting Installer Preferences 12 Operation 23 The PIN Prompt 23 Setting the Start event or run temperature...

Page 4: ...V common terminal Equipment Connections A common input is provided for the main 5 equipment relays while a separate relay common is provided for the 6th auxiliary relay input The 6th Auxiliary Functio...

Page 5: ...l cabling It is recommended to use the 4 wire communicating room sensor if you have concerns about problems associated with long cable runs or interference in the sensor wiring As this sensor is a dig...

Page 6: ...s mode is active to warn you that the function is active Relay Test Mode Use the relay test mode with caution The relay test will cycle all Viking relays and illuminates the LED displays to prove rela...

Page 7: ...witch Settings Sw1 Off Rev in Heat On Rev in Cool Sw2 Off HP Mode Installer Options For 4 compressor systems Set Aux relay Comp 4 2 Stage Cooling With Drive Open Drive Closed Hot Water Valve The first...

Page 8: ...ith heat Sw2 On HC Mode Installer Options Set Aux relay Aux heat SetY1 Cool Single Stage Water Sourced Heat Pump This is similar to a standard single stage heat pump except that the auxiliary input is...

Page 9: ...fined set point This sensor is perfect for permitting the room occupants to trim the room temperature without making large adjustments For projects that present difficulty in running wires for sensors...

Page 10: ...of the advanced sensor functions such as Vent Mode or After Hours start if necessary To use the After hours function with averaging sensors the after hours switch must be wired so that it affects the...

Page 11: ...ply measures temperature and humidity without permitting local set point adjustment or display etc This type of sensor is essential for use as an outside air sensor and can be used for an inside senso...

Page 12: ...control of the Viking To enter the Installer menu press the F3 If the key lock is enabled you will be given the option to enter your 3 digit PIN before advancing to the next step See page 23 for inst...

Page 13: ...button to fast exit the installer menu Answering YES will enter the menu where you will be able to adjust the highlighted option with the UP DOWN buttons Using the SELECT button when displayed will pe...

Page 14: ...nd run 24 hours per day 7 days per week This setting is to be used when using the RS SSD to turn the Viking On and OFF manually Manual The Viking will rely on an external signal to turn it on or off T...

Page 15: ...ting temperature Range Off then 6 C to 49 C Cool The setback cooling temperature Range 6 C to 49 C then OFF 6 Change After Hours Run Period Default 2 Hours The Viking has a built in after hours timer...

Page 16: ...hat the number of fitted compressors is correct See more details on the Viking Lead Lag Function on page 30 Smart Upstaging Default 5 mins The Viking does not simply measure the difference between the...

Page 17: ...urs timer is initiated this relay will remain inactive Compressor 4 The auxiliary relay is assigned as compressor 4 Compressors 1 3 must be active for this function to operate See Compressor Staging L...

Page 18: ...he fan on for a purge period of time after the set point has been reached and the heating and cooling has stopped 14 Change Unoccupied Mode Settings Default Heat Cool Off A Fan The Viking has an Unocc...

Page 19: ...the A C system This is useful if you have multiple Vikings running from a single time clock to protect the building s power system Fault NC Closing this input will shut the Viking down The LCD will sh...

Page 20: ...Change Economy Settings Default OFF Please note you must assign one of the 0 10V analogue outputs as described above before being permitted to adjust the economy settings within this menu The Viking w...

Page 21: ...tage relay outputs can be given PI control You have 99 degrees of proportional and integral action to choose from You will be given 2 settings when selecting PI control The first digits are the P prop...

Page 22: ...lays and LEDs to verify correct operation It is recommended that this test is not performed while connected to an A C system as this may stress the A C system Service Mode Enabling this function will...

Page 23: ...u should now have the PIN window showing 021 If you have made an error pressing the BACK button will permit you to adjust a previous digit Press the ENTER button to proceed If the PIN was entered corr...

Page 24: ...the Setback set temperatures as set by the installer see Setting the Setback Temperatures on page 15 This provides around the clock temperature control Additionally the Viking has an inbuilt after hou...

Page 25: ...th a number of options Use the SELECT button to highlight the word Holiday and then press the SET button Use the UP DOWN buttons to choose one of the 30 available holiday event placeholders The holida...

Page 26: ...ill need to be manually deleted as they don t expire automatically Press SAVE to save the new time parameters and exit the menu The BACK button will exit this menu discarding changes Note All holiday...

Page 27: ...t please contact Smart Temp or an authorised distributor for application specific guidance As some brands of dampers cannot easily operate in reverse close at 10V the Viking provides two 0 10V outputs...

Page 28: ...ish to test correct damper operation Enter the Economy mode in the installer menu Change Economy Settings Change Economy ON to TEST Exit the installer menu The Economy LED will be on and the LCD will...

Page 29: ...gs Valve Control The Viking can control heating and or cooling valves via a 0 10 or 2 10V signal The span of the valves can also be individually set The heating valve can be fully open at 10V when 3 C...

Page 30: ...again placing a normally open momentary switch across this input will start or cancel the after hours timer See How to Set the Auxiliary Input Function on page 19 for more information on this functio...

Page 31: ...1 Stop Event 2 Start Event 2 Stop Monday 10am 11pm 11pm 11pm Tuesday 10am 11pm 11pm 11pm Wednesday 10am 11pm 11pm 11pm Thursday 10am 11pm 11pm 11pm Friday 10am 11 59pm 11 59pm 11 59pm Saturday 12am 5a...

Page 32: ...365 day schedule In the On position the Viking will use the Start program temperatures and fan mode for as long as this switch is closed In the OFF position the Viking will shut down If one of the Aux...

Page 33: ...trolled from a central location or via the internet etc if connected to a suitably equipped master An animated icon will be displayed on the Viking LCD whenever a remote device is communicating with t...

Page 34: ...For full details on applying the Viking to network use for the points lists and other necessary information on networking the Viking please refer to the Viking communications addendum document availab...

Page 35: ...ion can be found on page 27 of this manual How can I test the economy function is working In the economy menu set Economy mode from ON to TEST using the up down buttons then select save See page 28 Th...

Page 36: ...D Backlight Relays Fan 12A Resistive 240V Max Volt Free All Others 5A Resistive 240Vac Max Volt Free 0 10V Output 10mA Max 0 10V Input 100k Impedance Room Outside Air Sensor 10K NTC Type II 2 Wire Scr...

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