DNT-T221 (Rev 4.1) Installation Guide
Model Numbers
Features DNT-T221 DNT-H121B
Internal Thermistor Input
Internal Humitity Input
Additional I/O 2IP, 2AO, 1 BO 1 IP, 2 AO, 1 BO
Backlighting Option B
External Input Terminator Option X
Button Icons
INT INT
An appended button icon code must be included to specify the desired icons embossed on the buttons as
follows:
[default] Bottom 2 buttons are ▼ and ▲ (Setpoint Adjust), top 2 are OFF and ON
INT Bottom 2 buttons are ▼ and ▲ (Setpoint Adjust), top 2 are O and I – International
You need not specify button icons if you want the default, but must specify INT if you want the international
button icons. (i.e., DNT-T221-INT).
Package Contents
• Delta Network Thermostat: BACstat II Product, DNT-T221 (Rev 4.1)
• DNT-T221 (Rev 4.1) Installation Guide
Other Relevant Documents
• Delta Controls Wiring and Installation Guidelines
• BACstat II Application Guide (for Configuration & Programming)
• ORCAview Operator Guide
• ORCAview Technical Reference Manual
• BACstat II, DAC and DCU Release Notes
Product Specifications
Power Requirements
• 24V AC, 50/60 Hz (Class 2)
• 15 VA maximum (with internally powered triac at full load)
(3VA without triac loading)
Ambient Ratings
• 32º to 131º F (0º to 55º C)
• 10 to 90% RH (non-condensing)
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Document Edition 1.8
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