Trane UCM 4.0 and WirelessVAV Communication Installation/ Operator Programming page 15

The following table briefly describes the typical behavior of various UCM configurations during normal operating modes.
Unoccupied
Cooling
Single Control to cooling
Duct setpoint.
Reheat All types of local
reheat available to
keep zone above
heating setpoint.
Fan Fan runs until valve
Series is fully closed AND
reheat is off.
Fan Fan off unless local
Parallel reheat is on.
(temp.)
Fan Fan off unless local
Parallel reheat is on.
(flow)
VAV-SVX01B-EN
UCM Programming
and Operation
Heating Morning Warm Up
Control to heating Tracer may place
setpoint. UCM in max flow and
supplies hot air.
Control to heating
Electric reheat is Electric reheat is
available if using auto available if using auto
changeover and the changeover and the
supply air temperature supply air temperature
(or auxiliary temperature) (or auxiliary temperature)
is below 70 o F . Local is below 70
hot water reheat is hot water reheat is
always available to always available to
keep the zone above keep the zone above
the heating setpoint. the heating setpoint.
Fan runs until valve
is fully closed AND
reheat is off.
Fan off unless local Fan off unless local
reheat is on. reheat is on.
Fan off unless local Fan off unless local
reheat is on. reheat is on.
Transition to occupied
Morning Cool Down
Tracer may place
UCM in max flow
and supplies cold
air. Control to
setpoint. cooling setpoint.
All types of local
reheat available to
keep zone above
heating setpoint.
o F . Local
Fan on. Fan on.
Fan off unless local
reheat is on.
Fan off unless local
reheat is on.
Occupied
Cooling Heating
Control to cooling Control to heating
setpoint. setpoint.
All types of local Electric reheat is
reheat available to available if using auto
keep zone above changeover and the
eating setpoint. supply air temperature
(or auxiliary temperature)
is below 70
hot water reheat is
always available to
keep the zone above
the heating setpoint.
Fan on. Fan on.
Fan on if needed Fan on if needed
for heat. for heat.
Fan on if needed Fan off unless local
for ventilation or reheat is on.
reheat is on.
o F . Local
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