Datasheet

95
TAC 2232
District Heating Compensator/
Optimizer
The TAC 2232 offers combined heating and domestic hot water control for
hot water heating systems. The controller is intended for three stage district
heating. The radiator circuit is controlled according to an outdoor tempera-
ture-compensated reset curve and reference sensor. The domestic hot water
is controlled by using a separate constant temperature controller.
FUNCTIONAL FEATURES
• Automatic adjustment of the
reset curve
• Ramp limitation of supply
setpoint
• Control of room temperature
via reference sensor
• Weekly program for night
setback
• Separate weekly program
for domestic hot water and
external unit
• Holiday program for heating
and domestic hot water
• Variable night setback and
morning heating
• Optimized changeover from
daytime operation to night
setback
• Temperature limitation from
the radiator circuit
• Pump control with exercise
function
• Heat control using an external
unit (SPC control)
• Extended daytime operation
and forced night setback from
an external unit
• Domestic hot water control
• Alarm
• Automatic adjustments
resulting from seasonal
variations
SPECIFICATIONS
Power supply. . . . . . . . . . . . . . . . . 24 V AC +20%, 50-60 Hz
Power consumption. . . . . . . . . . . . 3W
Dimensions . . . . . . . . . . . . . . . . . . 144 x 96 x 96mm (5.7” x 3.8” x 3.8”)
Ambient Temperature
Storage . . . . . . . . . . . . . . . . . . . . . . . .–20 °C to +50 °C (–4 °F to +122 °F)
Operation. . . . . . . . . . . . . . . . . . . . . .0 °C to +50 °C (32 °F to +122 °F)
Humidity . . . . . . . . . . . . . . . . . . . . . .max. 90% RH non-condensing
Real Time Clock
Accuracy at +25°C (77ºF) . . . . . . . ±12 minutes/year
Backup memory . . . . . . . . . . . . . . 48 hours
Enclosure rating. . . . . . . . . . . . . . . IP 40, front IP 54
Thermistor Inputs
Type of thermistor. . . . . . . . . . . . . 1800 ohm/25°C (+77ºF)
Measurement range . . . . . . . . . . . –50°C to +120°C (-58º F to + 248º F)
Relay Outputs
Max. voltage. . . . . . . . . . . . . . . . . 250 V AC
Max. current . . . . . . . . . . . . . . . . . 2 A
Inputs
Sensor inputs B1-B4 . . . . . . . . . . . thermistor input (see above)
Heat adjustment (SPC), U2 . . . . . . 0–10 V DC
Domestic hot water valves . . . . . . 0-10 V DC or 2–10 V DC
DESCRIPTION
200-2301-000 TAC 2232 Controller, incl. Swedish documentation
Heating Controllers