The YKN2Open board (A1) indicates smoke faults with a 4-5 flashing sequence of the red LED. If
thermostat DPC-1 is fitted, the incident is indicated on the screen where the time is displayed along with
fault code 45.
Once the presence of smoke has disappeared, the thermostat must be manually reset and the
YKN2Open board (A1) reset to delete the incident.
Where the economiser accessory is fitted, check the position of jumper J20 on the economiser board.
Jumper J20 (outside damper closed with high temperature-smoke alarm) is open by default. If the jumper
is closed, outside damper open with high temperature-smoke alarm is selected.
In units equipped with a supply probe connected to the YKN2Open board, with hot water coil (accessory)
or economiser, if a supply temperature of over 80 °C is detected the equipment will stop and fault code
45 is displayed.
1.6 Installation
1.6.1 Installation
1. Disconnect the main switch on the unit.
2. Fit the optical sensor. In accordance with instructions in the section
Assembly
, see on page 3.
3. Fit the DAD control.
4. Fit the temperature/smoke control board in the electrical box.
N O T E
If the temperature detection accessory is also fitted, a temperature/smoke control board is fitted and
the two normally closed contacts fitted in series in input J4.
5. Connect the cables supplied according to the wiring diagram.
6. Once all of the connections are made, reconnect the unit main switch.
7. Check that the green LED on board A9 remains lit. Next, search and configure the accessories by
pressing the test button on the YKN2Open board (A1) for more than three seconds, until the red
LED lights up. When the search and configuration process starts, the red LED on the board will light
up and will remain on until the operation is completed. Once it has switched off, check that the green
LED (V1) on board A9 is flashing to indicate that the accessory has been configured.
8. To check the electrical operation, disconnect the wires of terminals J4 on board A9 or apply smoke
directly to the optical sensor and check that the YKN2Open board (A1) indicates the high temperature
fault with a 4-5 flashing sequence of the red LED. Reconnect the wires and reset the YKN2Open (A1)
board to delete the fault.
C A U T I O N
Loose connection terminals produce overheating of cables and terminals. The unit will work incorrectly
and there is a risk of fire.
Data and measurements subject to changes without prior notice.
1
Smoke detector
1.6
Installation
8
Summary of Contents for ACTIVA 175
Page 3: ...1 Smoke detector...
