AERMEC WMT21 Manuel D'installation page 47

Condensate alarm: regulation is suspended.
Motor alarm.
Valve error.
Occupied room: regulation reactivated or exit from "Economy"
mode.
Unoccupied room: regulation suspended or "Economy" mode
activated.
Some symbols on the display show the outputs status: fan, valves or other
connected loads.
The "fan speed" symbols show fan status: all off when fan is off; all lit
when fan is on, according to the following indications:
Speed 1 Speed 2
If the thermostat is configured to control the fan with the 0..10V
proportional output, the higher the fan speed, the more fan dashes will be
turned on in the fan symbol.
Symbols " " and " " indicates the status of the valve outputs which is
different depending on the type of system.
Two pipes system: : heating mode, valve open
: cooling mode, valve open
Four pipes system:
Electric heater system:
Integrating electric heater
system:
The symbols associated with a proportional valve output turn on even if the
proportional valve is set to a minimum opening position.
Symbols can also be flashing, to explain that the relevant output should be
turned on, yet it is temporarily disabled by another function.
As an example, outputs are disabled in the following situations:
- The cut-off thermostat is inhibiting the fan;
- Window contact suspends the temperature regulation.
INSTALLATION
Carry out the operations below to install the device, while following the
images in page 3 to page 7:
1 Release the plate attached to the thermostat base by pushing it to the
Speed 3
left. This releases the teeth shown in Fig. 1.
2
Push the plastic tab in the lower slot using a screwdriver, slightly
lifting the cover (Fig. 2).
3 Turn the cover, while pressing it slightly, until it is extracted (Fig. 3).
4
Fix the plate to the wall, using the two screw seats with centre
distances of 60 mm or 85 mm (use the supplied wall plugs and/or
screws). Pass the wires through the rectangular openings (Fig. 4).
47
: heating valve open
: cooling valve open
: heating mode, electric heater on
: cooling mode, cooling valve open
: heating mode, valve open
: cooling mode, valve open
: heating mode, electric heater on