Delta Controls BACstat II Series User Manual

Delta Controls
Document Edition 3.1
Page 23 of 35
5. F
AN COIL UNIT (FCU) – [Application (AV12) = 4]
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
AV27 PWM maximum value Depends on OP2 configuration
AV28 Binary Off Delay For the Fan
AV29 Time Proportioned Heating Controller Limit Depends on OP3 configuration
Sequence of Operation
The fan will operate according to the selected fan type as described under Fan Control in the Output section of
this document (on page 29). For hotel applications you may want to define the fan type as Manual.
The selected heating and cooling outputs will operate according to their type and the controller stage that they are
associated with.
DNT-T103 Only: When the fan type is ‘Intermittent’ the fan will start when the first stage controller value for
heating or cooling becomes greater than 99.9%. When the first stage controllers for heating and cooling both
become less than 1% a delay counter for stopping the fan will be started. Once the delay time has expired
(Setpoint 28, Output 3 Binary Delay) the fan output will be turned off.
6. U
NIT HEATER
This application is no longer supported as of Release 3 firmware for BACstat II products. Use the FCU
application to configure control for a Unit Heater. [And refer to Edition 1.6 for earlier firmware releases.]

Delta Controls BACstat II Series Specifications

General

Brand	Delta Controls
Model	BACstat II Series
Category	Thermostat
Language	English