TCY-MT-U
Configuration
Doc: 70-00-0176 V1.2, 20160114
© Vector Controls GmbH, Switzerland
Page 8
Subject to alteration
www.vectorcontrols.com
Input configuration
Parameter Description
Range
Default
CP 18
Configuration of remote input (X1)
0 = Control Input
1 = Comfort/Economy Mode switch
2 = Comfort/OFF Mode switch
3 = Keycard switch function
4 = Output enable
0…4
0
CP 19
Activation delay (minutes):
The time the binary input needs to be open before Economy or
OFF mode is activated.
0…255 min
5
CP 20
Fixed set point for key card function in heating mode
0–60°C (32..160°F)
17°C (63°F)
CP 21
Fixed set point for key card function in cooling mode
0–60°C (32..160°F)
27°C (81°F)
CP 22
For TCY-MT2-U only: Enable Auto changeover
ON, OFF
OFF
CP 23
For TCY-MT2-U only: Auto changeover limit heating
0–60°C (32..160°F)
30°C (86°F)
CP 24
For TCY-MT2-U only: Auto changeover limit cooling
0–60°C (32..160°F)
15°C (59°F)
Configuring the function of the external input X1
The external input X1 may be configured for several functions:
CP18 = 0
External control input
The control input is provided by the external input. The internal input
will not be used.
CP18 = 1
Switching Economy and
Comfort modes
Economy (unoccupied) and Comfort (occupied) modes are controlled
through an external contact by connecting X1 through a dry contact to
signal common. This function may be used together with key card
switches for hotels or motion detectors for offices.
CP18 = 2
Switching Energy Hold
OFF and Comfort
modes
Opening the external temperature input will force the unit into the OFF
operation mode. The operation mode cannot be overridden by using the
terminal. Connecting the binary input to GND returns control of the
operation mode to the terminal. This function may be used as window
contact to prevent loss of energy.
CP18 = 3
Key card function
As with CP18 = 1, the key card function switches economy
(unoccupied) and comfort (occupied) modes. Instead of using the set
point shift, the set points in unoccupied mode are defined by parameter
CP20 and CP21.
CP18 = 4
Output enable
This may be used for a dew point sensor input. Output will switch off if
contact opens.
Configuring auto changeover input X2 (TCY-MT2-U only):
The auto changeover function automatically changes heating and cooling mode based on supply media
temperature or outdoor temperature. The difference between the two is in the values of the changeover limits
CP23 and CP24. See table below for recommended settings.
Heating and cooling may be as well changed by an open contact switched to signal ground. Note: all signal
ground levels of involved controllers must be the same in case more than one controller is switched.
Recommended settings for CP23 and CP24:
Change over mode
Relation CP23 to CP24
Example CP23
Example: CP24
Supply media
CP23 > CP24
25°C (77F)
18°C (64F)
Outside temperature
CP23 < CP24
15°C (59F)
25°C (77F)
Dry contact: Heating if contact closed
CP23 > CP24
25°C (77F)
15°C (59F)
Dry contact: Cooling if contact closed
CP23 < CP24
15°C (59F)
25°C (77F)
