94
14.2 Protection Control for Heating Operation
14.2.1 Outdoor Air Temperature Control
The maximum current value is regulated when the outdoor air temperature rises above 14°C in order to avoid
compressor overloading.
14.2.2 Deice Operation
When outdoor pipe temperature and outdoor air temperature is low, deice operation start where outdoor fan motor
stop.
Deice judging condition
Deice mode selection condition
o
There are 2 deice modes, according to water inlet temperature and outdoor ambient temperature the deice
mode is decided.
Judgement details:
1) When water inlet temperature is more than 50°C, unit will operate deice mode 1.
2) When water inlet temperature is less than 27°C, unit will operate deice mode 2.
3) When water inlet temperature is less than 50°C and outdoor ambient temperature is less than -10°C, unit will
operate deice mode 2.
4) When water outlet temperature sensor 2 detect temperature is less than 22°C, unit will operate deice mode 2.
-30
-30
-20
-10
0
10
20
30
-25
-20
-15
-10
-5
0
5
10
O
D
P
ipe
T
e
m
p
er
at
ur
e
(°C
)
Outdoor Unit Deice Control
line for continuous 3 minutes
and Pipe Temperature below this
When Heating Time > 35 minutes
Outdoor Temperature (°C)
3. Heating accumulation time
1. Outdoor air sensor temp.
2. Outdoor pipe sensor temp.
Deice start depends:
50°C
27°C
-
10°C
Water inlet temperature
Outdoor ambient temperature
Deice mode 1
Deice mode 2
Summary of Contents for WH-ADC0916G9E8
Page 34: ...34 4 2 Outdoor Unit Air inlet rear Air inlet side Air inlet side Air outlet Air outlet ...
Page 40: ...40 8 Wiring Connection Diagram 8 1 Indoor Unit RY HT L1 RY HT L2 RY V3 RY V2 RY HT L3 ...
Page 100: ...100 Note Default value refer Location of Control and Component OPERATION ACTUAL ...