Immergas FH 25WZ Instruction And Warning Book page 28

4.20.1 Remote wiring connections (compulsory)
The numbers of terminals block may change without notice. For links is therefore necessary to ALWAYS make the wiring
diagram supplied along with the unit.
4.20.2 Remote wiring connections (optional)
REMOTE ON / OFF (Only WZ versions)
To switch the unit on or off from remote control.
Use voltage free contacts.
The units are supplied as standard from the factory with bridged terminals.
Contact closed, unit ON,
Contact open, unit OFF.
REMOTE SUMMER / WINTER CHANGE OVER (Only WZ versions)
It is used for remote switching summer / winter
The units are supplied as standard from the factory with no-bridge terminals.
Use voltage free contacts .
Contact closed, unit in WINTER mode,
Contact open, unit SUMMER mode.
AMBIENT HYGROSTAT (UA) e AMBIENT THERMOSTAT (TA)
Ambient Hygrostat connected to terminal 9, ambinet thermostat connected to the terminal 65.
Summer mode functionality
Terminal 9 closed, 65 open: Unit in dehumidification mode witth neutral air.
Terminal 65 closed : unit in dehumidification mode with cooling.
Terminal 9 open, 65 open: unit in stand-by
Winter mode functionality
Terminal 9 closed: unit in dehumidification mode with heating
Terminal 65 closed: unit in ventilation mode (see below)
The units are supplied as standard from the factory with no-bridge terminals.
FAN FORCED
It is used to force the unit in ventilation mode only.
Terminal are free voltage.
Terminal closed fan forced ON
Terminal open fan forced OFF
The units are supplied as standard from the factory with no-bridge terminals.
FAN SPEED
The unit is equipped with a three-speed fan, factory wired at medium speed.
To vary the rotation fan speed , move:
Cable n. 18 connected at L: LOW SPEED
Cable n. 18 connected at M: MEDIUM SPEED
Cable n. 18 connected at H: HIGH SPEED
GENERAL ALARM
It is used to remote unit general alarm.
Terminal closed: Unit alarm IN
Terminal open: unit WORKING
28