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
CAT-VISTA-A4.indd 95 6/18/2009 1:51:33 PM