Installation And Commissioning Of The External Radio Humidity Sensor - Defensor H15A Service Manual

20
3.2

Installation and commissioning of the external radio humidity sensor

Required components
– External radio humidity sensor with 9V battery and operating instructions (Art.-No.:2524759)
– Receiver module (Art.-No.:2525353)
Installation
1. Set the PH... out of operation and disconnect it from the mains (unplug mains cable).
2. PH15/PH15A and PH27/PH27A: Remove air inlet lattice (PH15/PH15A) / air outlet lattice (PH27/
PH27A). Then, undo the 4 screws (Torx 15) of the cover of the electronic compartment and care-
fully flap the cover to the side.
PH28/PH28A: Remove the three air outlet grills. Then, undo the two Phillips screws of the cover
of the electronic compartment and carefully flap the cover upwards.
Attention! The electronic components on the control board are very susceptible to electrostatic
discharges. For the protection of these components, measures must be taken during all instal-
lation work to prevent damage caused by electrostatic discharge (ESD–protection).
3. Carefully insert the contact pins of the receiver module into the corresponding connection ter-
minal on the control board. Make sure the pins are not bent.
4. PH15/PH15A and PH27/PH27A: close cover of the electronic compartment and fix it with the 4
screws (Torx 15). Then, insert air inlet lattice (PH15/PH15A) / air outlet lattice (PH27/PH27A) .
PH28/PH28A: carefully flap the cover of the electronic compartment downwards and fix the
cover with the two Phillips screws. Then, insert the three air outlet grills in the desired position
into the unit.