Trane IntelliPak WEHE Series Installation, Operation And Maintenance Manual page 51

4. VOM Mode "D" Priority 4 - Purge:
– Supply fan - ON
– VFD - 100% (if equipped)
– Exhaust fan - ON, Exhaust dampers - Open
– O/A dampers - Open
– Heat - All stages OFF, Modulating Heat output at 0
vdc
– Occupied/Unoccupied output - Energized
(Unoccupied)
– VO Relay - Energized
– Preheater State - Off (if equipped)
5. VOM Mode "E" Priority 5 - Purge with duct pressure
control:
– Supply fan - ON
– VFD - (if equipped) Controlled by S/A Pressure
Control with supply air pressure highlimit disabled.
– Exhaust fan - ON, Exhaust dampers - Open
– O/A dampers - Open
– Heat - All stages OFF, Modulating Heat output at 0
vdc
– Occupied/Unoccupied output - Energized
(Unoccupied)
– VO Relay - Energized
– Preheater State - Off (if equipped)
"OFF" - will appear in the Ventilation Override screen after
all VOM binary inputs have been reset (opened).
Due to codes in some areas, the definitions for some or all
of the VOM modes may have to be locked into the program
by the user. Once the definitions are locked, the Ventilation
Override Module must be replaced in order to reprogram
that sequence.
Refer to Figure 27, p. 44 or
connection terminals in the unit control panel for each of
the VOM initiating device's and the appropriate
Programming, Troubleshooting Guide (PTG Latest
Edition) for programming instructions.
Emergency Override Definitions (with LCI-I/
BCI-I module installed)
When an LCI-I/BCI-I module is installed, the user can
initiate one of five (5) Emergency Override sequences that
have the following predefined unit operation:
PRESSURIZE
Supply Fan - On
Exhaust Fan - Off (if equipped)
Exhaust Dampers - Closed (if equipped)
OA Dampers - Open
Heat - All heat stages Off (staged gas and elec.), Hydronic
heat & Mod Gas Heat output at 0%.
RT-SVX35H-EN
Figure 33, p. 57 for the proper
Occupied/Unoccupied output - Energized
VO Relay - Energized (with VOM module installed)
OA Preheater State - Off (with VCM module installed)
DEPRESSURIZE
Supply Fan - Off
Exhaust Fan - On (if equipped)
Exhaust Dampers -Open (if equipped)
OA Dampers - Closed
Heat - All heat stages Off (staged gas and elec.), Hydronic
heat & Mod Gas Heat output at 0%.
Occupied/Unoccupied output - De-energized
VO Relay - Energized (with VOM module installed)
OA Preheater State - Off (with VCM module installed)
PURGE
Supply Fan - On
Exhaust Fan - On (if equipped)
Exhaust Dampers - Open (if equipped)
OA Dampers - Open
Heat - All heat stages Off (staged gas and elec.), Hydronic
heat & Mod Gas Heat output at 0%.
Occupied/Unoccupied output - Energized
VO Relay - Energized (with VOM module installed)
OA Preheater State - Off (with VCM module installed)
SHUTDOWN
Supply Fan - Off
Exhaust Fan - Off (if equipped)
Exhaust Dampers - Closed (if equipped)
OA Dampers - Closed
Heat - All heat stages Off (staged gas and elec.), Hydronic
heat & Mod Gas Heat output at 0%.
Occupied/Unoccupied output - De-energized
VO Relay - Energized (with VOM module installed)
OA Preheater State - Off (with VCM module installed)
FIRE
Supply Fan - Off
Exhaust Fan - Off (if equipped)
Exhaust Dampers - Closed (if equipped)
OA Dampers - Closed
Heat - All heat stages Off (staged gas and elec.), Hydronic
heat & Mod Gas Heat output at 0%.
Occupied/Unoccupied output - De-energized
VO Relay - Energized (with VOM module installed)
OA Preheater State - Off (with VCM module installed)
Installation
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