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Siemens REV 22 Manual

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CE1N2252E / 14.01.1999 Siemens Building Technologies
6/8 Landis & Staefa Division
123
PID 12
PID 6
2-Pt
4
2252Z03
5°C
3°C
10°C
Self learning
2252Z03
The REV22… is a two-position controller providing PID control. The room temperature
is controlled through the cyclic switching of a regulating unit.
The controller is supplied with an active self-learning mode, which enables it to auto-
matically adapt to the controlled system (type of building construction, type of radiators,
size of rooms, etc.). After a certain learning period, the controller optimises its parame-
ters and then operates in the mode it has learned.
In exceptional cases, where the self-learning mode may not be adequate, it is possible
to choose PID 12, PID 6 or 2-Pt mode:
PID 12 mode Switching cycle of 12 min for normal or slow controlled systems (e.g.
massive building structures, large spaces, cast-iron radiators, oil burn-
ers).
PID 6 mode Switching cycle of 6 min for fast controlled systems (e.g. light building
structures, small spaces, plate radiators or convectors, gas burners).
2-Pt mode Pure two-position control with a switching differential of 0.5 °C
(±0.25 °C) for very difficult controlled systems with considerable out-
side temperature variations.
Frost protection is adjustable with DIP switch 2, either 3 °C, 5 °C, or 10 °C.
Operating voltage DC 3 V
Batteries (alkaline AA) 2 x 1.5 V
Battery life approx. 2 years
Backup for
battery change 1 min max.
-conformity to
EEC directive 89/336/EEC
low voltage directive 73/23/EEC
Switching capacity of relays
Voltage AC 24…250 V
Current 6 (2.5) A
Measuring element NTC 68 kΩ at 25 °C
Measuring range 0…40 °C
Time constant max. 2 min
Set point setting range
Normal temperature 3…29 °C
Economy temperature 3…29 °C
Set point for frost protection
Adjustable 3 / 5 / 10 °C
Factory setting 5 °C
Resolution of settings and display
Set points 0.2 °C
Switching times 10 min
Measurem. of actual value 0.1 °C
Display of actual value 0.2 °C
Time display 1 min
Insulation class
to EN 60730-1 II
Degree of protection
to EN 60529 IP30
Electromagnetic compatibility
Immunity EN 50082-2
Emissions EN 50081-1
Perm. ambient temperature
Operation 3…35 °C
Storage -25…+60 °C
Perm. ambient humidity
to DIN 40040 G
Weight 0.24 kg
Colour White
RAL9003
•
The room temperature controller should be fitted in the main living room.
•
The place of installation should be chosen so that the sensor can capture the room
temperature as accurately as possible, without being affected by direct solar radia-
tion or other heating or cooling sources.
•
Mounting height is approx. 1.5 m above the floor.
•
The unit can be fitted to most commercially available recessed conduit boxes or di-
rectly on the wall.
DIP switch 3
Control
Self-learning mode
Exceptional cases
Frost protection
Technical data
Notes
Engineering
6


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