Specifications; Heat Detector; Parameter Sets - Siemens OH720 Technical Manual

4.3.2 Specifications

No. Name
1 Standard
2 Sensitive

4.4 Heat detector

4.4.1 Parameter sets

Building Technologies
Fire Safety
The following table shows the properties of the parameter sets for the smoke
detector OP720:
Response time [s]
10
10
All parameter sets meet the criteria of standard EN 54-7.
The heat detectors HI720 and HI722 respond when the temperature exceeds a
preset threshold value.
Heat detectors are used in environments where misleading sources of false alarms
are present and where, if smoke detectors were to be used, an unacceptable
number of false alarms would be triggered.
If parameterized appropriately, the heat detector HI720 can recognize sharp
increases in temperature and is suitable for areas with a stable ambient
temperature.
The heat detectors HI720 and HI722 have the following parameter sets (parameter
set number and comments in brackets):
● A2S (1/Default)
● A2R (2, HI720 only)
Explanation of designation 'A'
● 'A' parameter sets should be applied at an ambient temperature of
approximately 25℃. However, they can be applied at temperatures up to 50
°C. The static response temperature is 60℃.
Explanation of designations 'R' and 'S'
● In comparison to the S-parameter sets, R-parameter sets also trigger alarms in
the event of a temperature increase (e.g., from 20°C to 50°C within a few
minutes).
Explanation of designation '2'
A number '2' appearing between letters denotes the room height according to the
EN 54-5 standard:
● 2 = room height max. 6 m
The procedure for setting the parameter set via the control panel is described in
the control panel documentation.
24BHeat detector
Sensitivity [%/m]
2.5
1.8
3BPlanning
4
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A6V10212047_m_en_--
2015-05-04