Delta Controls DNT-T103, Application Manual

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Delta Controls
Document Edition 4.1 Page 25 of 41
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 Compressor
(0/10v) Reversing
Valve (0/10v) Heating 2
Room Temp. N/A Optional OAT Compressor
(0/10v) Reversing
Valve (0/10v) Cooling 2
Room Temp. N/A Optional OAT Compressor
(0/10v) Reversing
Valve (0/10v) Fan
Room Temp. N/A Optional OAT Compressor
(0/10v) Reversing
Valve (0/10v) None
(MUX)
Setup Parameters
Setup Variable Function Notes
AV24 Binary Delay Transition Timer for Compressor
AV25 N/A
AV26 Binary Delay Transition Timer for Rev. Valve
AV27 N/A
AV28 PWM minimum value or Binary On Delay Depends on OP3 configuration
AV29 PWM maximum value or Time Proportioned
Heating Controller Limit Depends on OP3 configuration
Sequence of Operation
Switch to HEATING

Turn Rev. Valve ON

Wait Delay Time
Switch to COOLING

Turn Rev. Valve OFF

Wait Delay Time
Rev. Valve
is OFF
Rev. Valve
is ON
Heating > 90% Cooling > 90%
Turn Compressor ON
Heating &
Cooling = 0
HEATING COOLING
Y Y
N N
Turn Compressor OFF
DEADBAND
Y Y Y
N N N
START
Turn Fan ON Turn Fan OFF