Frost Protection - Carrier 42AM Regelungshandbuch

5 - CONTROL
Economy
The temperature is controlled according to the eco setpoint.
In HEATING mode, the shift will be downwards: i.e. comfort setpoint > eco setpoint
E.g.: HEATING setpoint in Comfort mode = 20°C → HEATING setpoint in ECO mode = 17°C.
In COOLING mode, the shift will be upwards: i.e. comfort setpoint < eco setpoint
E.g.: COOLING setpoint in Comfort mode = 24°C → COOLING setpoint in ECO mode = 27°C.

Frost protection

The frost protection function is validated in HEATING mode. In COOLING mode, it is automatically switched to ECONOMY mode. An
integral action must be entered into the parameters.
100 %
0 %
5.2.2 - Managing the 0-10 V output for valve control
5.2.2.1 - Mixed, heating and cooling coil.
Used to set the control box's operating mode. This parameter only appears for mixed coils.
- WINTER. Heating and fan override.
- SUMMER. Cooling and fan override.
- AUTO. CHANGEOVER thermostat fitted to the coil's main water supply pipe.
It will automatically enable HEATING/COOLING mode, depending on the temperature of the fluid
The CHANGEOVER thermostat is fitted as standard on mixed coils.
- the CHANGEOVER contact is closed: COOLING mode
- the CHANGEOVER contact is open: HEATING mode
The symbols below will be displayed on the main page to show the current mode.
Cooling override
38
XX7515390-03_CONTROL_11_2019_BOX_MONO_EC_42AM.indb 38 XX7515390-03_CONTROL_11_2019_BOX_MONO_EC_42AM.indb 38
Valve ctrl
Frost protection mode
P 130
Heating proportional
band
Heating override
P154: Frost
protection setpoint
Heating mode via changeover
Room T°
Cooling mode via changeover
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