Trane VUVE Vertical Classroom Manual de instalación descargar pdf (Pagina 72)

72 UV-SVN03F-EN

Startup

Tracer ZN520 Unit Startup

Refer to the most recent version of Trane publication CNT-

SVX04A-EN (Tracer ZN520 Unit Controller: Installation,

Operation and Programming Guide). The factory pre-

programs the ZN520 with default values to control the

temperature and unit airflow. Use Tracer Summit building

automation system or Rover™ software to change the

default values.

Follow the procedure below to operate the ZN520 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 th

e zone sensor module to

55°F for cooling or 85°F for heating.

The appropriate control valve will

actuate assuming the

following conditions:

1. Room temperature should be greater than 55°F and

less than 85°F.

2. For a 2-pipe fan-coil unit with an autom

atic changeover

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.

3. Select the correct temperature setpoint.

Note: S

elect and enable zone sensor temperature

settings to prevent freeze damage to unit.

Tracer UC400 Unit Startup

Refer to the most recent version of Trane publication BAS-

SVX48B-EN (Installation, Operation, and Programming:

Tracer UC400 Programmable Controller) for Tracer UC400

unit ventilator. The factory pre-programs the Tracer UC400

unit ventilator 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.

Follow the procedure below to operate the Tracer UC400 in

a stand-alone operation:

1. Turn power on at the disconnect switch option.

2. Position the fan mode switc

h to either high, medium,

low, or the auto position.

3. Rotate the setpoint dial on th

e zone sensor module to

55°F for cooling or 85°F for heating.

The appropriate control valve will

actuate assuming the

following conditions:

1. Room temperature should be greater than 55°F and

less than 85°F.

2. For a 2-pipe fan-coil unit with an autom

atic changeover

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.

3. Select the correct temperature setpoint.

Note: Select and enable zone sensor temperature

settings to prevent freeze damage to unit.

General Information

Manual Fan Speed Switch

The manual fan mode switch is available with a four-

position switch (off-hi-med-lo) allows manual fan mode

selection and is available unit- or wall-mounted. See

Figure 59.

The fan speed switch can be used to provide simultaneous

fan speed customer requests in addition to external

controller fan speed request. The wall-mounted option is

low-voltage and has three 24-volt relays using a factory-

wired transformer and relays to control the fan motor.

Fan Mode Switch Operation

Off

Fan is turned off, two-position damper option spring-

returns closed.

Hi, Med, Lo

Fan runs continuously at the selected speed. The two-

position damper option opens to an adjustable

mechanical stop position.

Tracer ZN520 Operation

Off

Fan is off; control valve options and fresh air damper

options close. The 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 three-speed fan to work cooperatively to

meet precise capacity requirement, while minimizing fan

Figure 59. Fan speed switch

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