UNT-SVX041D-EN
63
Start Up
Units are limited to 200°F maximum water temperature on
the heating cycle.
Prior to start-up, check entire unit for construction debris
and dust. Clean the unit. Change dirty filters.
If unit is installed during winter months, ensure the unit is
not subject to freezing temperatures while filled with water
during construction. Coils damaged due to freezing are
not covered under warranty.
In hot, humid climates, do not operate the unit during
construction or renovation with doors and windows open,
allowing outside air to enter the building. When outside air
enters into the building, it imposes high cooling and
dehumidifying loads on the unit. These conditions could
cause the unit to sweat, which could damage property.
After electrical connections are complete, prior to turning
on the remote disconnect (i.e. circuit breaker), ensure the
disconnect switch inside the unit is set to “ON”. Install the
motor cover and return air grilles/access panels. After this
is complete, turn on the remote disconnect and the unit
will run.
Tracer® UC400-B Controller
Tracer® UC400-B controller delivers single zone VAV
control in a stand-alone operation or as part of a building
automation system using BACnet
®
communications.
UC400-B Stand-Alone Operation
The factory pre-programs the Tracer® UC400-B with
default values to control the temperature and unit airflow.
Use Tracer® SC building automation system or Tracer®
TU™ software to change the default values. For more
information, refer to:
•
BAS-SVX48*-EN Tracer® UC400/UC400-B
Programmable Controllers for Blower Coil, Fan Coil,
and Unit Ventilator Installation, Operation, and
Maintenance guide
Follow the procedure below to operate the Tracer®
UC400-B in a stand-alone operation:
1. Turn power on at the disconnect switch option.
2. Position the fan mode switch to either high, medium,
low, or the auto position.
3. Rotate the setpoint dial on the zone sensor module to
55°F for cooling or 85°F for heating.
The appropriate control valve will actuate assuming the
following conditions:
•
Room temperature should be greater than 55°F and
less than 85°F.
•
For a 2-pipe fan-coil unit with an entering water
temperature sensor, the water temperature input is
appropriate for the demand placed on the unit. For
example, cooling operation is requested and cold
water (5° lower than room temperature) flows into the
unit.
•
Select the correct temperature setpoint.
Note:
Select and enable zone sensor temperature
settings to prevent freeze damage to unit.
UC400-B Operation
Controller
Off
- Fan is off; control valves and fresh air damper option
close. Low air temperature detection option is still active.
Auto
- Fan speed control in the auto setting allows the
modulating (3-wire floating point) or 2-position control
valve option and 1-, 2-, 3- or variable-speed fan to work
cooperatively to meet precise capacity requirement, while
minimizing fan speed (motor/energy/acoustics) and valve
position (pump energy, chilled water reset). As the
capacity requirement increases, the water valve opens.
When the fan speed capacity switch points are reached,
the fan speed ramps up and the water valve repositions to
maintain an equivalent capacity. The reverse sequence
takes place with a decrease in required capacity.
Low/Med/High
- The fan runs continuously at the selected
speed and the valve option will cycle to meet setpoint.
NOTICE
Equipment Damage!
Failure to follow these instructions could result in
equipment damage. After installation and before start
up, ensure filter is clean and free of construction debris.
Operating the unit with a dirty or clogged filter could
affect unit performance and/or cause equipment
damage.
NOTICE
Coil Freeze-up!
Failure to follow instructions below could result in coil
damage. Drain and vent coils when not in use. Trane
recommends glycol protection in all possible freezing
applications. Use a glycol approved for use with
commercial cooling and heating systems and copper
tube coils.
NOTICE
Coil Damage!
Failure to follow instructions below could result in coil
damage. Do not operate unit during construction or
renovation with windows open. Outside air can impose
high cooling and dehumidifying loads on the unit,
causing the unit to sweat.
