Mode-A; Mode-B; Emergency Hold - Honeywell H-S81-HS Operation Manual

Notes for the Development of Systems in Compliance with the EN12094-1 Standard

6.2.19 Emergency Hold

The system features inputs for receiving the emergency hold signal. (Hold). Two possible modes
exist for this function:

Mode-A

Release control outputs are not activated until the emergency hold device is active. When the emer-
gency hold device deactivates, after the release delay time, the release control outputs activate
immediately (EV).

Mode-B

Release control outputs are not activated until the emergency hold device is active. The release
delay time is reset every time the emergency hold device is released. After the emergency hold
input is activated, the system carries out the following operations:
• Activation of local audible indication (if previously silenced)
• Activation of the HOLD steady light indicator on module S81-F6001
• Activation of the output for emergency hold replication
NOTE: The fault condition of the emergency hold input line will inhibit the activation of releasing
control outputs.
6.2.20 Activation of a Secondary Release Sequence
The system can control a secondary release sequence. This sequence is activated by manual device.
The secondary flooding sequence is activated only in the following cases:
• Primary release sequence is over ("released" condition)
• Sounders have not been silenced
• System has not been reset
• Secondary sequence manual actuation input is active.
NOTE: The secondary releasing control output is activated immediately after the activation of
the manual actuation input without any delay.
6.2.21 Manual Only Mode (Aut-Off)
The system features inputs for receiving the signal switching the operating mode from
manual only to automatic/manual and vice versa. After this input is activated, the system
carries out the following operations:
• Activation of the Aut-Off steady light indicator on module S81-F6001
• Activation of the output for Manual only operation replication. (Aut-Off)
NOTE: During the manual only operation, a fire extinguishing zone can be activated only by
means of the manual actuation device (PB).
6.2.22 Actuation Commands for System Internal Equipment
The system can control equipment located inside the fire extinguishing zone. E.g. Pilot cylinders,
visual alarm devices, etc. The modules to be used for these purposes are:
• S81-F5003:
• S81-F5001, S81-F5004:
H-S81-HS Installation & Operation Manual — P/N LS10114-000HI-E:A 2/24/2015
for controlling visual and audible alarm devices
for controlling solenoids, valves, etc.
Application Notes
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