Emergency Override - Trane IntelliPak 3 with Symbio 800 Installation, Operation And Maintenance Manual

• Equipment Stop
• Emergency Stop
• Manual Control
When any VOM Mode (A, B, C, D, E) input is activated or
closed, the VOM mode of operation will begin in less than
10 seconds, and a VOM Relay binary output will energize/
close. Heating capacity, cooling capacity, and Rapid
Restart will be disabled/terminated.
Refer to the table below summarizing the unit operation in
response to VOM binary inputs Modes. VOM inputs are
fully configurable; therefore,
factory default settings.
Table 42. Ventilation override mode
VOM Input
Mode A
(Unit Off)
Mode B
(Pressurize)
Mode C
(Depressurize)
Mode D
(Purge)
Mode E
(Purge with Duct Static Pressure
Control)
(a) Supply fan will operate at full speed or a limited speed not to exceed duct static pressure high limit.

Emergency Override

Emergency override provides the ability for a Building
Automation System to override control of the HVAC
equipment to pressurize, depressurize, purge, shutdown
ventilation to the space for life safety or smoke control
systems. Refer to Table 43, p.
operation in response to Emergency Override commands.
RT-SVX080A-EN
Table 42, p. 95 provides the
OUTPUT
Supply fan
Outdoor air damper
Relief fan / Relief damper
VAV Box Relay
Supply fan
Outdoor air damper
Relief fan / Relief damper
VAV Box Relay
Supply fan
Outdoor air damper
Relief fan / Relief damper
VAV Box Relay
Supply fan
Outdoor air damper
Relief fan / Relief damper
VAV Box Relay
Supply fan
Outdoor air damper
Relief fan / Relief damper
VAV Box Relay
96summarizing the unit
If one or more of the 5 VOM inputs are closed, the unit will
enter the VOM mode with the highest priority (A highest, E
lowest). Should the unit be in an active VOM mode and a
VOM input of higher priority is closed, the unit will
immediately transition to the higher priority mode. Should
the unit be in an active VOM mode and a VOM input of
lower priority is closed, the unit will not change to this lower
priority mode until the current (higher priority)VOM mode
binary input is opened.
When all VOM inputs are open, within 15 seconds, VOM
terminates. All unit components will be reset OFF or
CLOSED, and after Unit Power Up Delay is honored the
unit will start normal operation.
OPERATION
Off/0%
Closed
Off/Closed
De-energized
On/100% (a)
100%
Off/Closed
Energized
Off/0%
0%
On/Open
De-engerized
On/100% (a)
Open
On/Open
Energized
On/Duct Static Pressure Control
Open
On/Open
Energized
Ventilation Override Mode v/s. Emergency Override
Ventilation Override inputs/output directly connect to fire
smoke control station (FSCS) panel. UUKL 864 requires
that firefighters have the ability to manually override
automated smoke control equipment. Manual changes
from a FSCS panel will take precedence over Emergency
Override from the Building Automation System.
Sequence of Operation
Heat Cool Mode Status
Off
Fan Only
Fan Only
Fan Only
Fan Only
95