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1811P01 1 811 QAC... FW-T1G Outside Sensors • Passive sensors for acquiring the outside temperature and – to a lesser degree – solar radiation, the wind effect and the temperature of the wall. • Range of use -40/50…+70 °C / 5…95 % r. F. Use The QAC… outside sensors are for use in heating, ventilation and air conditioning plants as: • Reference sensors for weather-compensated control • Measuring sensors, e.g. for optimization, measured value indication, or for connection to a building automation and control system Type summary Type reference Sensing element Range of use Time constant QAC22 LG-Ni 1000 − 50...+ 70 °C ca. 14 min QAC32 NTC 575 (linearized) − 50...+ 70 °C ca. 12 min QAC2010 Pt 100 − 50...+ 70 °C ca. 14 min QAC2012 Pt 1000 − 50...+ 70 °C ca. 14 min QAC2030 NTC10k − 40...+ 70 °C ca. 14 min FW-T1G T1 (PTC) − 50...+ 70 °C ca. 14 min Ordering and delivery When ordering, please give name and type reference, e.g.: Outside sensor QAC22. CE1N1811E 20.11.2006 Building Technologies HVAC Products … … . Equipment combinations The outside sensors are suited for use with all types of controllers capable of acquiring and handling the sensor’s measured value. Function The outside sensor acquires the outside temperature and − to a lesser degree − solar radiation, the wind effect and the temperature of the wall. The sensing element changes its resistance value as a function of the temperature. Characteristic: Accuracy: R [Ω] LG-Ni 1000 ∆ϑ [K] 1400 2.0 1200 1.0 1000 0.0 800 −1.0 600 −50 −40 −30 −20 −10 0 10 ϑ [°C] 20 30 40 50 60 70 80 1811D02 1811D01 −2.0 −50 −40 −30 −20 −10 R [Ω] NTC 575 ϑ 0 10 20 30 40 50 60 70 80 [°C] ∆ϑ [K] 1811D03 700 3.0 1811D04 Sensing elements 2.0 650 1.0 600 0.0 550 −1.0 500 −2.0 450 −50 −40 −30 −20 −10 0 10 20 30 40 50 60 70 80 ϑ [°C] −3.0 −50 −40 −30 −20 −10 0 10 20 30 40 50 60 70 80 0 10 20 30 40 50 60 70 80 0 10 20 30 40 50 60 70 80 ϑ [°C] 140 120 ∆ϑ [K] 1811D06 1811D05 R [Ω] Pt 100 (class B) 0.8 0.4 0.0 100 −0.4 80 −0.8 60 −50 −40 −30 −20 −10 0 10 20 30 40 50 60 70 ϑ 80 [°C] −50 −40 −30 −20 −10 ϑ [°C] 1400 1200 ∆ϑ [K] 1811D06 1811D07 R [Ω] Pt 1000 (class B) 0.8 0.4 0.0 1000 −0.4 800 −0.8 600 −50 −40 −30 −20 −10 0 10 20 30 40 50 60 70 ϑ 80 [°C] −50 −40 −30 −20 −10 ϑ [°C] 2/4 Building Technologies HVAC Products Outside sensors QAC... CE1N1811E 20.11.2006 R [Ω] ∆ϑ [K] 1811D09 1000000 100000 10000 1000 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 ϑ [°C] 0 10 20 30 40 50 60 70 80 ϑ [°C] R [Ω] 1819D01 3200 3000 ∆ϑ [K] 5.0 4.0 2800 3.0 2600 2.0 2400 1.0 2200 0.0 2000 −1.0 −2.0 1800 −3.0 −4.0 1600 1400 −40 −30 −20 −10 R ϑ ∆ϑ 1819D02 T1 (PTC) Legend 1.20 1.00 0.80 0.60 0.40 0.20 0.00 -0.20 -0.40 -0.60 -0.80 -1.00 -1.20 -40 -30 -20 -10 1811D08 NTC 10k 0 10 20 30 40 50 60 70 ϑ 80 [°C] −5.0 −40 −30 −20 −10 ϑ 0 10 20 30 40 50 60 70 80 [°C] Resistance in Ohm Temperature in degrees Celsius Temperature differential in Kelvin Mechanical design The sensor has a plastic housing with a removable cover. The connection terminals can be accessed after removal of the cover. Cable entry is either from the rear (concealed wiring) or from below (surface-run wires). A cable entry gland can be screwed into the bottom of the housing. Engineering notes The permissible cable lengths depend on the type of controller with which the sensor is used. They are specified in the Data Sheet of the relevant controller. Mounting notes Depending on use, the outside sensor must be located as follows: Mounting location • For control: On the wall of the house or building that has the windows of the occupied rooms, but the sensor must not be exposed to the morning sun. In case of doubt, it should be mounted on the wall facing north or north-west • For optimization: Always on the coldest wall of the house or building (normally the wall facing north). The sensor must never be exposed to the morning sun Mounting height Preferably in the middle of the house or building or heating zone, but at least 2.5 m above the ground. The sensor must not be fitted at the following locations: • Above windows, doors, air extracts or other heat sources • Below balconies or the eave of the roof To prevent measuring errors due to air circulation, the cable conduit at the sensor should be sealed. The sensor may not be painted over. Mounting Instructions are printed on the packaging. 3/4 Building Technologies HVAC Products Outside sensors QAC... CE1N1811E 20.11.2006 Technical data Functional data Protective data Electrical connections Environmental conditions Materials and colors Weight Range of use refer to "Type summary" Sensing element refer to "Type summary" Time constant refer to "Type summary" Accuracy refer to "Function" Type of measurement and output passive Degree of protection of housing IP 54 to IEC 529 Safety class III to EN 60 730 Screw terminals for 2 x 1.5 mm or 1 x 2.5 mm 2 2 Cable entry for cable gland (e.g. M 16 x 1.5) Perm. cable length refer to "Engineering notes" Operation Climatic conditions Temperature Humidity − 40...+ 70 °C 0 . . . 1 0 0 % r. h. Storage / transport to Climatic conditions Temperature Humidity Mechanical conditions IEC 721-3-2 class 2K3 − 25...+ 65 °C < 95 % r. h. class 2M2 Base plastic (ASA) . . Cover plastic (ASA), RAL9003 Packaging cardboard Incl. packaging approx. 0.093 kg B M 1811G01 Internal diagram The internal diagram is identical for all types of outside sensors covered by this Data Sheet. The connecting wires are interchangeable. Dimensions 6 4 20,7 92 5,5 3 5,5 . . Ø 16 50 25 24,5 49,5 1811M03 80 Drilling plan Dimension in mm 4/4 ©2004 - 2006Siemens Switzerland Ltd Building Technologies HVAC Products Outside sensors QAC... Subject to alteration CE1N1811E 20.11.2006