Delta Controls DNT-T103 User Manual

DNT-T103 & DNT-T221 Application Guide
Page 26 of 41 Document Edition 4.1
If the Heating and Cooling controllers are both zero the control logic is in deadband and the compressor
output is turned O
FF.
If the Heating controller value exceeds 90% the control logic will switch to heating, and the reversing
valve is turned O
N if isn’t on already. After the transition timer has expired the compressor output will
be turned O
N. The transition timer will then be reset (to the value set in the Setup variable AV24).
If the Cooling controller value exceeds 90% the control logic will switch to cooling, and the reversing
valve is turned O
FF if isn’t off already. After the transition timer has expired the compressor output will
be turned O
N. The transition timer will then be reset.
The HPU algorithm may use a fan on Output 3, or have an auxiliary heating or cooling output of type
Binary or PWM or Timed Proportional.
When the fan type is ‘Intermittent’ the fan will start when the compressor starts. When the compressor
stops the fan will be turned off when the delay time has expired (Setpoint 28, Output 3 Binary Delay).
N
OTE
: The analog outputs on the DNT-T221 do not modulate, but provide a 0 or
5. FAN COIL UNIT (FCU) – [Application (AV12) = 4]
10v
signal for the compressor and reversing valve, and require interface relays for
switching purposes.
Function: Control of a simple Fan Coil Unit with fan.
DNT-T103 I/O (Outputs 1 to 3 are Triacs)
Input AI1 Input AI2 Input AI3 Remote AV5 Output 1 Output 2 Output 3
Room Temp. N/A Optional OAT Heating 1 Heating 2 Fan
Room Temp. N/A Optional OAT Heating 1 Cooling 1 Fan
Room Temp. N/A Optional OAT Heating 1 MUX Fan
Room Temp. N/A Optional OAT Cooling 1 Heating 1 Fan
Room Temp. N/A Optional OAT Cooling 1 Cooling 2 Fan
Room Temp. N/A Optional OAT Cooling 1 MUX Fan
Room Temp. N/A Optional OAT Tri-State
Heating (Open)
Tri-State
Heating (Close)
Fan
Room Temp. N/A Optional OAT Tri-State
Cooling (Open)
Tri-State
Cooling (Close)
Fan
DNT-T221 I/O (Outputs 1 & 2 are Analog, and Output 3 is a Triac)
Input AI1 Input AI2 Input AI3 Remote AV5 Output 1 Output 2 Output 3
Room Temp. N/A Optional OAT Heating 1 Heating 2 Fan
Room Temp. N/A Optional OAT Heating 1 Cooling 1 Fan
Room Temp. N/A Optional OAT Heating 1 MUX Fan
Room Temp. N/A Optional OAT Cooling 1 Heating 1 Fan
Room Temp. N/A Optional OAT Cooling 1 Cooling 2 Fan
Room Temp. N/A Optional OAT Cooling 1 MUX Fan
Setup Parameters
Setup Variable Function Notes
AV24
PWM minimum value or Binary On Delay or
Actuator Runtime (Tri-State Valves)
Depends on OP1 configuration
AV25 PWM maximum value Depends on OP1 configuration
AV26 PWM minimum value or Binary On Delay Depends on OP2 configuration

Delta Controls DNT-T103 Specifications

General

Brand	Delta Controls
Model	DNT-T103
Category	Thermostat
Language	English