Comfort Cooling - LG MULTI V 5 Manual Book

6.7 Comfort Cooling

It is function to reduce the ODU energy consumption by the continuous operation without thermo off.
■ Setting the function
Function
Comfort Cooling Id 10
■ Option Selection
seg1, seg2 seg3, seg4
0
1
1 ~ 64
2
3
• Set EACH IDU : Select "Idu" → "Id10" → EACH → Select IDU No. → Set Value
• Set All IDU : Select "Idu" → "Id10" → ALL → Set Value
■ Detailed information
• This function is used with heat pump and heat recovery.
• Possible setting condition
Indoor setting temperature - Indoor temperature < -2℃
• Operation
- Exist Indoor unit humid sensor : Use Indoor unit humid Value
- Non Exist Indoor unit humid sensor : Use Default Value
- Accurate superheat control using calculated values
· For detailed logic, please refer to the next appendix page.
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Option
seg1, seg2 : IDU No.
seg3, seg4 : 0, 1~3
seg3, seg4
No setting
Cooling capacity low, Power consumption low
Cooling capacity mid, Power consumption mid
Cooling capacity high, Power consumption high
App. The Logic of Comfort Cooling
• Comfort Cooling means the superheat control of indoor unit.
: Changes the refrigerant flow rate of each indoor unit by EEV
• Comfort Cooling is controlled by 2 factors.
- 1 st : 『Room temperature (Tair) - Setting temperature (Ttarget)』
- 2 rd : Relative humidity (default : outdoor humidity)
(Refer to indoor humidity if we applied standard III remote controller inside)
■ Cooling Operation Logic
1. Room temperature (T ) Setting temperature (T
-
air
• In case of standard humidity condition
- condition.1 : superheat adjustment value is 0 (comfort cooling step.1 setting)
* refer to next slide (remote controller setting)
- condition.2 : relative humidity is between 50% and 70%
T - T Superheat Temp. Variation (℃)
air target
< -0.5
-0.5 ≤ & < 0.5
0.5 ≤ & < 1.5
1.5 ≤ & < 2.5
2.5 ≤ & < 3.5
3.5 ≤0
2. Relative humidity effect
• In case of high humidity condition (RH 100 ~ 70%)
- No superheat temp. variation (not related with Tair - Ttarget )
• In case of low humidity condition (RH 50 ~ 30%)
- heat temp. variation was increased up to +3℃ (max)
RH(%) 100~70 70~50
T -T Target Coil Temp.
air target
< -0.5 0 +2
-0.5 ≤ & < 0.5 0 +2
0.5 ≤ & < 1.5 0 +1
1.5 ≤ & < 2.5 0 +1
2.5 ≤ & < 3.5 0
3.5 ≤0 0
)
target
+2
2℃ High
+2
+1
+1
0
0℃ Low
0
superheat
50~30 30~
+3
+3
+2
+2
0 +1
0 +1
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