Room temperature controller with 7-day time switch, lcd and opt. remote temperature sensor for heating systems (9 pages)
Summary of Contents for Siemens QFA1000
Page 1
Technical Instructions Document No. 155-708 July 19, 2010 QFA1000, QFA1001 Room Hygrostats QFA1000 QFA1001 Description The room hygrostats are used for controlling and monitoring relative humidity in ventilation or air conditioning facilities. They ensure room humidity control within the selectable range of 30 to 90% relative humidity by controlling humidification or dehumidification equipment.
Page 2
Technical Instructions QFA1000, QFA1001 Room Hygrostats Document Number 155-708 July 19, 2010 Mode of Operation The hygrostat acquires the relative humidity of the ambient air with its humidity measuring element, which is a stabilized, plastic strip. The strip actuates a microswitch...
Page 3
Operating Elements Setpoint knob with scale – only with QFA1001 Setpoint setting spindle Scale for setpoint adjustment with QFA1000 Figure 2. Operating Elements. Mounting Notes The base has cable entries at the rear for mounting the room hygrostat on recessed conduit boxes.
Page 4
Technical Instructions QFA1000, QFA1001 Room Hygrostats Document Number 155-708 July 19, 2010 Base PPS, Fortron, fiberglass reinforced, Materials and colors Black Cover PC Lexan 940, pure-white Humidity measuring element Plastic conformity Standards EMC directive 89/336/EEC UL873 Canadian Standard C22.2 No. 24-93 QFA1001 3.17 ounces (0.090 kg)