T1
T2
T1
T2
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8. Deice Control
•
Deicing operation is controlled by timer and sensing the indoor pipe temperature.
•
Deicing operation checks the indoor pipe temperature and Intake-air temperature at 25 minutes and 60 minutes
on starting of heating operation, and discriminates by temperature difference.
•
When the heating operation passed 25 minutes, the temperature (
△
T1=TE1–TR1) is checked and memorized
with checking the indoor pipe temperture (TE1) and the indoor Intake-air temperature (TR1).
•
When the heating operation passed 60 minutes, deicing operation checks the indoor pipe temperature (TE2)
and the indoor Intake-air temperature (TR2), and checks indoor pipe temperature(TE2), the temperature
difference (
△
T2=TE2–TR2) and the temperature difference
△
Td(=
△
T1–
△
T2) of
△
T1,
△
T2.
If temperature of indoor pipe is below 32°C Deicing function operates at the priority I condition.
If temperature of indoor pipe is over 32°C Deicing function operates at the priority II condition.
If the temperature difference (
△
Td) become more than the option temperature, deicing operation starts.
•
At that time, deicing operation time is decided.
•
The deicing operation time starts after deicing operation started.
•
If deicing operation start, above heating operation time is reset, so if deicing operation is finished, the heating
operation time is recounted.
•
The deicinig time and the operation diagram are as following.
TEMP
°C
60 minutes
25 mins
TE1
TE2
25 mins
Heating
Heating
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
ON(Heating Operation)
ON
ON
OFF
COMPRESSOR
4-WAY VALVE
OUTDOOR FAN
INDOOR FAN
DEICE LED
Deicing
Hot
Start
Pipe Temp.
Intake Air
Temp.
T1-
T2
=
Td
Over 3.5°C
3.0
～
3.5°C
2.5
～
3.0°C
2.0
～
2.5°C
below 2.0°C
Deicing Time
12mins
11mins
10mins
9mins
Heating Operation
TE2
below 30°C
30~31°C
31~32°C
Over 32°C
Deicing Time
12mins
11mins
10mins
Heating Operation
(DEICING DIAGRAM)
Priority I
Priority II
