Vector TCI-W13 - Page 17

TCI-W13, TCI-W23 Universal Controller
AUX FUNCTIONS CONFIGURATION
Doc: 70-00-0365A, V1.5, 20230901 © Vector Controls GmbH, Switzerland Page 17-18
Subject to alteration
Heating/cooling mode changeover
Parameter
Description
Range
Default
Fu 20
Select heat/cool changeover input (0 = function disabled):
1 = 1T, 2 = 1H, 3 = 1U, 4 = 2T, 5 = h/c status loop 1,
6 = h/c status loop 2
0...6
0
Fu 21
Cooling activation delay (seconds)
0...1275
300
Fu 22
Input limit 1
per input
20
Fu 23
Input limit 2
per input
40
➔ Switch heating/cooling state based on a universal input value. The input may be from a supply media (air or water)
or outdoor air temperature sensor. For supply media temperature we recommend switching to cooling at 16 °C/61 °F
and to heating at 28 °C/83 °F. For outdoor temperature we recommend switching to cooling at 28 °C/83 °F and to
heating at 16 °C/61 °F outdoor temperature. These recommendations are given as suggestions. The ideal settings
may be different on the actual project depending on climatic and system conditions.
➔ The change between heating and cooling is delayed to avoid unnecessary switching (FU21). Heat/cool status of one
control loop may also be determined by the heat/cool state of the other loop (FU20= 5 or 6). The control loop used to
determine the heat /cool state must be set to demand-based heating and cooling with (L23). Set limit 1 and limit 2 to
switch between heating and cooling with options below. Example: When Limit 2 is greater than Limit 1, switch heat to
cool at Limit 1, cool to heat at Limit 2. For binary open/close contact, open is a high value (100%), closed is a low
value (0%).
Cool
Mode
Mode
Heat
Input
Limit 2 > Limit 1
Heat
Cool
Input
Limit 1 > Limit 2
Limit
1
Limit
2
Limit
2
Limit
1