Basic Documentation
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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Faults 03.10.2011
The function is activated by configuring at a minimum a digital input Xx in fault
block (basic type A) or at time switch 1 (basic type P):
Main menu > Commissioning > Extra configuration > Faults (basic type A)
Main menu > Commissioning > Extra configuration > Time switch 1 (basic type P)
Operating line Adjustable values / remarks
Smoke extraction
supply air
---, N.X1, N.X2, ... (digital inputs only)
Smoke extraction
extract air
---, N.X1, N.X2, ... (digital inputs only)
At an active signal on input "Smoke extraction supply air", the supply air fan and
the extract air fan on input "Smoke extraction extract air" can be emergency shut
down.
Furthermore, a geographic zone can be entered for basic type P on the RMU
controller. Time switch 1 or smoke extraction signals also act in this zone. This is
the same functionality as in the RMB795 central control unit (see basic
documentation CE1P3121en, section 8.9).
Both inputs can be configured from the same digital input Xx for smoke
extraction with supply and extract air
The ON by smoke extraction takes priority over the OFF by fire alarm (see
section 6.13 Operating mode priorities)
You must provide a hardware solution should smoke extraction be activated first
for a pending fire alarm off
The fans are switched on to maximum speed during smoke extraction operation
(e.g. speed 2 for 2-speed operation) and remain on for as long as the smoke
extraction signal is pending. Then, the plant resumes normal operation according
to schedule.
The fault priority is always "Urgent", smoke extraction must always be
acknowledged.
No. Text Effect
3901 Smoke extraction Urgent message; must be acknowledged
During smoke extraction, control is off and the outside air damper open. Although
the frost protection function can switch on the pump and open the heating coil
valves, the plant cannot be switched off. If heat is not available, the heating coil
cannot be prevented from freezing.
Configuration
Notes
Fault status messages