Freeze Prevention - Daikin ERQ Service Manual

Outline of Control
6.2

Freeze Prevention

Freeze
When the temperature detected by liquid pipe temperature thermistor (R2T) of the AHU heat
Prevention by Off exchanger drops too low, the unit enters freeze prevention operation in accordance with the
Cycle (AHU) following conditions, and is also set in accordance with the conditions given below.
Conditions for starting freeze prevention: Temperature is –1°C or less for total of 40 min., or
temperature is –5°C or less for total of 10 min.
Conditions for stopping freeze prevention: Temperature is +7°C or more for 10 min.
continuously
Ex: Case where temperature is –5°C or less for total of 10 min.
40
: http://splitoff.ru/tehn-doc.html
ESIE09-05
Function