Vector TLC3-BCR-U Series, Manual

Page: 10 / 10

TLC3-BCR-U Thermostat
C
ONTROL
C
ONFIGURATION
Doc: 70-00-0294, V3.1, Date: 20140508 © Vector Controls GmbH, Switzerland Page 10
Subject to alteration
Input configuration
Parameter Description Range Default
CP 17 Changeover input:
0 = No external input
1 = Occupation sensor – Comfort / Economy
2 = Occupation sensor – Comfort / Off
3 = Heat / Cool change over, heat cool change if over limit
4 = High / Low limit supervision, outputs switch off if over limit
0…6 0
CP 18 Activation delay (Minutes) = the time the binary input needs to be
open before Economy/off mode is activated if CP17 = 1, 2.
Does not apply for heat cool changeover or high/low limit
0…255 min 5
CP 19 Heat – cool changeover limit heating if CP17 = 3
Low limit if CP17 = 4 -40-60°C 16°C (61°F)
CP 20 Heat – cool changeover limit cooling if CP17 = 3
High limit if CP17 = 4 -40-60°C 28°C (83°F)

Configuring the function of the external change over input
CP17 = 0 CO input not used
CP17 = 1 Switching Economy and
Comfort modes
Economy (unoccupied) and Comfort (occupied) modes are controlled
through an external contact by connecting X2 through a dry contact to
signal common. This function may be used together with key card
switches for hotels or motion detectors for offices.
CP17 = 2 Switching Energy Hold OFF
and Comfort modes
Opening the X2 temperature input will force the unit into the OFF
operation mode. The operation mode cannot be overridden by using the
terminal. Connecting X2 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.
CP17 = 3 Heat – Cool changeover Switch heating and cooling mode based on supply media or outside
temperature or binary contact. See below for further details.
CP17 = 4 High – Low limit
supervision
This may be used for a high temperature limit for floor heating or dew
point sensor input for cooling ceilings. Output will switch off if contact
opens.

Configuring auto changeover input if CP17 = 3:
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
CP19 and CP20. 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 CP19 and CP20:
Change over mode CP17=3 Relation CP19 to CP20 Example CP19 Example: CP20
Supply media CP19 > CP20 25°C (77F) 18°C (64F)
Outside temperature CP19 < CP20 15°C (59F) 25°C (77F)
Dry contact: Heating if contact closed CP19 > CP20 25°C (77F) 15°C (59F)
Dry contact: Cooling if contact closed CP19 < CP20 15°C (59F) 25°C (77F)
Change over mode CP17=4 Relation CP19 to CP20 Example CP19 Example: CP20
Output off if outside range CP19 < CP20 15°C (59F) 45°C (113F)
Dry contact: OFF if contact closed CP19 < CP20 -40°C (-40F) 45°C (59F)
Dry contact: OFF if contact open CP19 < CP20 15°C (59F) 80°C (176F)