Functional Control ESIE98–06A
2–14 Part 2 – Functional Description
3
1
2
4
5
1.9 Freeze-up Control
Freeze-up
protection
Freeze-up protection is a protection against ice formation in the water circuit at the evaporator outlet.
There are 2 sorts of freeze-up protection:
■ Soft freeze-up protection: to control the outlet water temperature.
■ Hard freeze-up protection: to control the evaporating temperature.
The following table shows all the characteristics of soft and hard freeze-up protection:
(1)
: Alarm is on hold and reset goes automatically.
Characteristics Soft freeze-up protection Hard freeze-up protection
control device sensor thermostat
diagram name R4T, R5T, R6T S16T, S17T, S18T
activation outlet water temperature < (4°C -1°) evaporating temperature < (-4°C -1,5°)
result circuit disabled the circuit stops
reset
temperature > 4°C
(1)
manually on controller
result circuit enabled the circuit restarts
To Next Page
Loading...