TAC 2222
The TAC 2222 offers combined heating and domestic hot water control for
hot water heating systems. The radiator circuit is controlled according to an
outdoor temperature compensated reset curve and reference sensor. The
domestic hot water is controlled by using a separate constant temperature
controller.
Simple symbols, a clear LCD display and a minimum number of buttons
makeiteasytoreadandchangethevalues.Therearethreeadjustablecurve
pointswhereyoucanadjusttheresetcurveexactlytosuitdifferentheating
systems.Areferencesensorisusedtoadjusttheresetcurveandtheduration
andthenightsetbackautomatically.Adjustmentsresultingfromseasonal
variations are automatic.
FUNCTIONAL FEATURES
• Automaticadjustmentofthe
reset curve
• Ramp limitation of supply
setpoint
• Control of room temperature
via a 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
• Separate limitation of return
temperature of heating and
domestic hot water
• 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
SPECIFICATIONS
Power supply. . . . . . . . . . . . . . . . . . . . . . 24 V AC +20%, 50-60 Hz
Power consumption. . . . . . . . . . . . . . . . . 3W
Dimensions . . . . . . . . . . . . . . . . . . . . . . . 144 x 96 x 96mm
(5.7”x3.8”x3.8”)
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)
Heatadjustment(SPC) . . . . . . . . . . . . . . 0–10 V DC
Domestic hot water valve . . . . . . . . . . . . 0-10 V DC or 2–10 V DC
Additional connection to outdoor temp . 0–10 V DC
DESCRIPTION
200-2051-000 TAC 2222 Swedish Controller
200-2052-000 TAC 2222 GB Controller
200-2053-000 TAC 2222 Danish Controller
200-2054-000 TAC 2222 Swedish/Finnish Controller
Heating Controllers
CAT-VISTA-A4.indd 94 6/18/2009 1:51:28 PM
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