TCY-MT-U
Temperature PID Controller
Doc: 70-00-0176 V1.1, 20100908
© Vector Controls GmbH, Switzerland
Page 9
Subject to alteration
Output Configuration
Analog Output
The analog output is fixed to 0-10VDC. The signal range may be configured with parameters. It is thus possible to directly
set min and maximum flow levels for VAV systems for example.
To adjust the output for a 2-10VDC signal set the minimum to 20% and keep the maximum at 100%
Output in standby mode
The analog output in standby mode may be reduced in order to save energy. The default value is set to 50%.
VAV applications
The following description is for 4-pipe systems. The settings apply to TCY-MT4-U.
In the VAV control sequence, at peak cooling the airflow setpoint is the maximum amount of air the VAV box is set to
deliver. It may be adjusted through the maximum limit on the analog output in cooling mode (
CP16
). As cooling
requirements decrease, airflow dwindles until it reaches its minimum setpoint. This setpoint will be based on the airflow
needed at design cooling and is typically 10% to 15% of maximum cooling airflow. Minimum airflow can be adjusted by
the minimum limit on the analog output in cooling mode (
CP15
) and in heating mode (
CP13
). When it reaches this
minimum, the system is in its dead band and is neither heating nor cooling. As the system moves into heating mode, the
airflow rate increases until it reaches the maximum airflow required for heating mode. This is typically 30 to 50% of
maximum airflow of cooling mode. The parameter for this is the maximum limitation in heating mode (
CP14
).
Configuration parameters for firmware version 1.1
The TCY-MT-U is preset to work for most applications. For special requirements it can be fine tuned to work ideal with a
simple parameter setup routine. The parameters can be changed on the unit without the need of additional equipment.
Identifying the firmware version
The parameters and functionality of controller depend on its firmware version and revision. It is therefore important to use
a matching product version and parameter set. The Firmware version and revision version can be found when pressing
simultaneously the
S
and
T
keys during several seconds. On the upper 7 segment display, the firmware version can be
found, on the lower 7 segment display the current revision index (or “sub-version”).
T [°C, F]
U [V, mA]
Heating
Cooling
100
50
0
Y
H1
, Y
R1
W
H
X
DZ
Y
C1,
Y
D1
W
C
heating max: CP14
Min cooling: CP15
Max cooling: CP16
Min heating: CP13
