Chapter 2: Installation
1X-X3 Installation Manual 11
Connecting extinguishing system manual call points
The manual call point inputs require an activation impedance between 100 and
620 Ω, 2 W. These are normally connected in series with a normally open (NO)
contact. An end-of-line resistance of 15 kΩ is required.
When the abort extinguishing or hold extinguishing manual call points are
activated, the control panel activates the related relay outputs on the main board.
Note: MCP Hold faults and MCP Abort faults prevent the panel from entering the
extinguishing activation state (because of life safety issues) and from activating
the actuator (to ensure property protection).
The extinguishing system supports three types of manual call point (MCP):
• MCP Start
• MCP Hold
• MCP Abort
Descriptions of each MCP type follow.
MCP Start. Starts the extinguishing process. When the panel is in the standby,
extinguishing preactivation, or fire alarm state, activation of this device puts the
panel in the extinguishing activation state.
The control panel can be configured to bypass any actuator delay and to activate
the actuator immediately on entering the extinguishing activation state. To
configure this, set the “Actuator delay for Start MCP” to OF.
MCP Hold. Holds the extinguishing process. When the panel is in the
extinguishing activation state, the actuator output is not activated while the MCP
Hold device is activated (continuously). The MCP Hold input can be configured
for two different operating modes.
Mode A: When the MCP Hold is activated, the actuator delay countdown
continues, but the panel is prevented from entering the extinguishing activation
state. When the MCP Hold is deactivated, the delay countdown determines when
the panel enters the extinguishing activation state.
In Mode A, activation of the MCP Hold turns on the MCP Hold LED, which stays
on until the panel is manually reset. The yellow Preactivation LED flashes to
indicate that the panel is being prevented from entering the extinguishing
activation state. The Preactivation LED flashes to show when the MCP Hold is
on; it turns off when the MCP Hold is off.
Mode B: When the MCP Hold is activated, the actuator delay countdown stops,
putting the extinguishing release process on hold. The sounders emit a unique
sound pattern (1 second on, 4 seconds off) while the extinguishing release
process is on hold. When the MCP Hold is deactivated, the delay countdown
restarts and the sounder pattern changes to the tone configured for extinguishing
activation. The MCP Hold LED turns off when the MCP Hold device is
deactivated.
See “Hold mode” on page 38 for instructions on setting the MCP Hold operating
mode.
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