Honeywell MS-9200UDLS Manual Do Utilizador

HVAC Control

MS-9200UDLS   PN 52750:A    11/04/05

179

The FACP can be programmed to shut down a building’s HVAC fans in the event of a 
fire.  The fans cannot be restarted until the fire alarm condition has been cleared and the 
FACP has been reset to a normal (non-alarm) condition.

The HVAC SHUTDN type code can be assigned to any addressable control relay 
module for the purpose of shutting down HVAC fans during a fire alarm condition.  

Devices connected to a module with this type code are unsupervised.  To program this 

feature in the FACP:

• Program the HVAC SHUTDN type code to the control module which will be 

used to shut down the fans (refer to Type under the section titled "Edit Module 

Screen for Control Modules" on page 68).

• Program the control module to a software zone and program alarm input devices 

which, when activated are to cause fan shutdown, to the same software zone 

(refer to Zone Assignment under the section titled "Edit Module Screen for 
Control Modules" on page 68).

• Monitor the control module using an addressable monitor module programmed 

for Supervisory Auto-resettable.  The monitor module label should be 
programmed to indicate HVAC SHUTDOWN.  When the control module is 

active (HVAC SHUTDN), the monitor module will indicate a supervisory 

condition at the FACP and the display should indicate the HVAC is shut down.  

Once activated, the HVAC SHUTDN control module remains activated, even if the 

FACP is silenced or reset.  After the alarm condition on the FACP has been cleared and 

the panel reset, the HVAC SHUTDN control module remains activated and the fans 
remain off.  The monitor module programmed for Supervisory Auto-resettable which is 

being used to supervise the control module, will indicate a supervisory condition at the 

control panel and the LCD should display that the HVAC is shut down.  The fans can 
only be restarted when the HVAC SHUTDN control module is deactivated by the 

HVAC RESTART module.

The HVAC RESTART type code can be assigned to any addressable monitor module 

for the purpose of resetting (deactivating) the HVAC SHUTDN control module and 
turning the fans back on.  The HVAC RESTART monitor module acts globally 

throughout the FACP system and therefore is not programmed to a particular software 

zone.  To program this feature in the FACP:

• Program the HVAC RESTART type code to the monitor module which will be 

used to deactivate the HVAC SHUTDN control module and restart the fans (refer 

to Type Monitor under the section titled  "Edit Module Screen for Monitor 
Module" on page 59).

The HVAC RESTART monitor module does not latch when activated.  Pressing a 

switch connected to the monitor module will deactivate the HVAC SHUTDN control 
module only if the fire alarm condition has been cleared and the FACP reset to a normal 

condition.  Pressing the switch during an alarm condition will have no effect.