Water Pump Capacity; Water Quality - LG Therma V Series Installation Manual

Water pump Capacity

The water pump us variable type which is capable to change flow rate, so it may be required to
change default water pump capacity in case of noise by water flow. In most case, however, it is
strongly recommended to set capacity as Maximum.
NOTE
!
• To secure enough water flow rate, do not set water pump capacity as Minimum.
It can lead unexpected flow rate error CH14.

Water Quality

Water quality should be complied with EN 98/83 EC Directives.
Detailed water quality condition can be found in EN 98/83 EC Directives.
CAUTION
!
• If the product is installed at existing hydraulic water loop, it is important to clean hydraulic
pipes to remove sludge and scale.
• Installing sludge strainer in the water loop is very important to prevent performance
degrade.
• Chemical treatment to prevent rust should be performed by installer.
• It is strongly recommended to install an additional filter on the heating water circuit.
Especially to remove metallic particles from the heating piping, it is advised to use a
magnetic or cyclone filter, which can remove small particles. Small particles may damage
the unit and will NOT be removed by the standard filter of the heat pump system.
• Water quality check should be implemented before completing the installation of system.
Detailed guide can be found in the table as below.
Water contents
pH
Conductivity
TDS (Total dissolved solids)
-
Alkalinity (HCO )
3
Total hardness
Iron (Fe)
2-
Sulphate (SO )
4
-
Nitrite (NO )
3
Free chlorine (Cl )
2
-
Chlorides (Cl )
PIPING AND WIRING FOR INDOOR UNIT
10~500 uS/cm
8~400 ppm
60~300 (mg/L)
4 ~ 8.5 °dH
71.4 ~ 151.7 (mg/L)
≤ 0.2 (mg/L)
≤ 100 (mg/L)
≤ 100 (mg/L)
≤ 1 (mg/L)
ppm
15 °C
40 °C
pH7
60 °C
80 °C
15 °C
40 °C
pH9
60 °C
80 °C
Value
7.5~9.0
STS316
3 000
500
200
125
18 000
2 600
1 000
550
53
STS304
180
50
30
20
700
250
170
130