146
Deice operation time diagram
a. Deice mode 1 control:
OD fan
ID pump
Expansion valve
Four way valve
Compressor
Free
Free
ON
OFF
OFF
ON
ON
Free
5
7
6
4
9
8
3
2
1
ON
ON
Free
Free
max 9 minutes 30 seconds
deice 1
b. Deice mode 2 control:
OD fan
OD fan
Main
Expansion valve
Bypass
Expansion valve
Four way valve
Sequence
Pump
Gas Bypass SV
Compressor
Deice mode 2
max 30 minutes
Normal
Deice
4~6
OFF
ON
ON
OFF
OFF
0
ON
ON
OFF
Free
Free
Free
Free
ON
OFF
OFF
1
2
3
4
5
6
7
8
Heating
operation