Trane VUV Installation, Operation And Maintenance Manual page 79

Table 28. Binary input configurations
Binary Input
BI 1 Low temperature detection
BI 2 Condensate
BI 3
BI 3 Generic binary input
BI 4
Note: The occupancy binary input is for standalone unit controllers as an occupied/unoccupied input. However, when the controller receives a communicated occupied/unoccupied
request, the communicated request has priority over the hard-wired input.
(a) During low temperature, condensate overflow, and fan status diagnostics, the controller disables all normal unit operation of the fan, valves, and damper.
(b) Table 29 shows the controller's response to low temperature detection, condensate overflow, and fan status diagnostics.
(c) The generic binary input does not affect unit operation. A building automation system reads this input as a generic binary input.
(d) If the fan mode input is in the off position or the controller is in the unoccupied mode with the fan off, the fan status input will be open. A diagnostic will not be generated when
the controller commands the fan off. A diagnostic will only be generated if the fan status input does not close after one minute from energizing a fan output or any time the
input is open for one minute. The controller waits up to one minute after energizing a fan output to allow the differential pressure to build up across the fan.
Binary Outputs
Binary outputs are configured to support the following:
• Three fan stages (when one or two fan stages are present,
medium fan speed can be configured as exhaust fan)
• One hydronic cooling stage
• One hydronic heating stage (dehumidification requires this
to be in the reheat position)
Table 29. Binary output configuration (Tracer® ZN520)
Binary Output Configuration
J1-1 Fan high
J1-2 Fan medium
J1-3 Fan low
J1-4 (Key)
J1-5 Cool valve—open, or 2-position valve
J1-6 Cool valve—close Note 1
J1-9 Heat valve—open, or 2 position valve, or 1st electric heat stage
J1-10 Heat valve—close or 2nd Electric heat
J1-11 Fresh air damper—open
J1-12 Fresh air damper—close
TB4-1 Generic/baseboard heat output
TB4-2 24 Vac
(a) For Tracer® ZN520 units configured and applied as 2-pipe hydronic heat/cool changeover, terminals J1-5 and J1-6 are used to control the primary valve for both heating and
cooling. For Tracer® ZN520 units configured and applied as 2-pipe hydronic heat/cool changeover with electric heat, terminals J1-5 and J1-6 are used to control the primary
valve (for both cooling and heating), and terminals J1-9 and J1-10 are used only for the electric heat stage. For those 2-pipe changeover units, electric heat will not be energized
while the hydronic supply is hot (5° or more above the space temperature
UV-SVX005G-EN
Description
(a)
overflow(a)
Occupancy
Fan status(a)
Configuration
Contact Closed
Normally closed
Normally closed
Normally open
Normally open
Normally open
• One DX cooling stage
• One or two-stage electric heat (dehumidification requires
this to be in the reheat position)
• Face and bypass damper
• Modulating outdoor air damper
• One baseboard heat stage
(a)
stage(a)
Controller Operation
Contact Open
Normal Diagnostic
Normal Diagnostic(b)
Unoccupied Occupied
(c)
Normal Normal(c)
Normal Diagnostic
Start-Up
(b)
(d)
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