Smart Temp Smt-920 Viking Hvac Controller
Description
SMT-920 Viking Smart Temp HVAC
Controller 365 Day Programming
includes RS-01/02 wall sensor with
AH Push button
365 Day, 7 Day or Manual Programming
30 Holiday Events
1 to 4 Stage Compressor Control
Compressor Lead Lag Function
2 Analogue Outputs with Library of Functions
1 Digital Output with Library of Functions
5 Dedicated HVAC Equipment Control Relays(Fan)
Comprehensive No Manual Needed Simple Menu Logic
Integrated Economy Function (Enthalpy Based)*
2 Wire Sensors with Multiple Functions
Optional 4 Wire Sensor with LCD Available
2 Digital Inputs with Library of Functions
24VAC or 240VAC Powered
Volt Free Relay Outputs 240VAC 10A Max
Modbus Communications
Replaces HEVAC Digital Controller
The SmartPak3 is a simple and reliable interface module that allows a 24V thermostat or low-voltage device to switch equipment with 240V control circuitry. It provides complete voltage isolation between the controller and mains-voltage equipment — making it the go-to solution for safe, code-compliant HVAC installations.
Key Features
- 3 relays rated at 240V / 16A
- LED status indicators on all relay functions
- DIN rail mounting (32mm or 35mm)
- Heat pump selector switch for use with standard heat/cool thermostats
- Single stage — ideal for split-system and cool-only applications
| Specification | Detail |
|---|---|
| Model | SMT-920 |
| Mounting | DIN Rail |
| Power Input | 24V AC or 90–250V AC |
| Compressor Stages | Up to 4 |
| Heating Stages | Multistage |
| Analog Outputs | 0–10V (Heat & Cool) |
| Analog Input | 0–10V (IAQ / CO₂) |
| Communications | Modbus RTU (4.8K / 9.6K / 19.2K / 38.4K baud) |
| Time Clock | 365-Day Scheduling |
| Holiday Events | Up to 30 |
| Display | Backlit graphical LCD |