Trane Tracer VV550 User Manual

14 CNT-SVX17G-EN
Inputs and Outputs
This sequence is ignored by and can be overridden by the following seven sequences
listed in priority from highest to lowest. For more information on control sequence
descriptions, refer to
“Control Sequences,” p. 8.
1. Power-Up/reset sequence (highest priority)
2. Manufacturing test
3. Unit shutdown
4. Emergency override
5. Manual output test
6. Auto commission
7. Water valve override
Space Setpoint Analog Input
The controller can operate without a valid space setpoint input value (either hardwired
or communicated).
The local setpoint input (SET) is designed as the local (hardwired) setpoint input. You
canno
t use the input for other functions. The local setpoint is a resistive input intended
for use with Trane zone sensors.
The controller generates a setpoint failure dia
gnostic when a valid setpoint is established
(through the hardwired input or through communications) and neither the local setpoint
nor the communicated setpoint is present. When a setpoint failure diagnostic occurs, the
controller operates using the configured heating and cooling setpoints. The heating and
cooling setpoints are factory configured, but can be changed with the Rover
™ service
tool.
The local hardwired setpoint is available on t
he communications network. The effective
setpoint used by the controller is available on the communications network.
Space temperature
either:
• Open (after normal
on reset);
• Short (anytime for
25
seconds).
Space
t
emperature
control
Space
temperature
failure; space
temperature
failure
diagnostic
Occupied:
con
figured
minimum airflow
Unoccupied: closed
Series fan
enabled;
parallel fan
Off
Off
Ventilation flow
con
trol
Normal
operation;
space
temperature
failure
diagnostic
Normal Do not care Normal
Flow tracking Normal
oper
ation;
space
temperature
failure
diagnostic
Normal Do not care Do not care
Table 8. Controller operation with no space temperature analog input
Failure type Control type Unit
operation
Air valve
operation
Fan
operation
Reheat operation

Trane Tracer VV550 Specifications

General

Brand	Trane
Model	Tracer VV550
Category	Controller
Language	English