CIAT AirControl CTA Manuel De Régulation page 76

If coil 1 is configured as Mixed, the action on its valve will be limited to prevent a drift in the temperature for the return network
to the heat pump.
If there is a fault with the heat pump (information received via a potential-free (dry) contact), an alarm will be displayed.
Cooling mode authorised
1.5.9 Annual heating operation programming
To use this function, a heating element (excluding heat recovery unit) must be configured.
This function can be selected from the screen on p27 of the settings parameters menu.
If this function is not validated, the heating elements are not disabled.
If this function is validated, the heating operation authorisation can be programmed annually.
The user can choose the period during which the heating elements are used.
This period is set on the screen on p28 of the settings parameters menu.
The heat recovery unit's heating operation is always active, and is not controlled by this program.
1.5.10 Mid-season operation
To use this function, the following conditions must be met:
• Control of return air or room air temperature
• Presence of a fresh air sensor
• Presence of a heating element (excluding heat recovery unit)
This function can be selected from the screen on p27 of the settings parameters menu.
If this function is validated, mid-season operation is activated according to the programmed annual periods.
The user can choose 2 periods during which the mid-season function is activated.
These 2 periods are validated and adjusted on the screen on p29 of the settings parameters menu.
The heat recovery unit's heating operation is always active, and is not controlled by this program.
Annual programming of the heating operation takes priority over the programming of mid-season operating periods.
Therefore, if days in the period of heating operation are identical to those in the mid-season operating period, heating
operation takes priority.
• Mid-season operation in precision mode
Two conditions define authorisation or prohibition of cooling and heating operation:
 The room temperature/ambient setpoint with hysteresis of 0.5°C.
Ambient zone
heating request
 The outdoor temperature/set mid-season operating threshold (screen p27) with hysteresis of 0.5°C
Cooling outdoor zone
Cooling and heating modes prohibited
10
Band
0.5°C
0.5°C
0.5°C
Ambient
setpoint
0.5°C
Operating
threshold
EN - 10
Heating mode authorised
40
Band
Room T°
Ambient zone
cooling request
Outdoor T°
Heating outdoor
zone