LG ARNH08GK3A2 Installation Manual page 15

Water tank temperature sensor connection
Process PT 1/2 inch
female bolt
Water Tank
Temperature Sensor
PT 1/2 inch
WARNING :
Installing recirculation pump
When Hydro Kit is used with the sanitary water tank, it is STRONGLY recommended to install
recirculation pump to prevent cold water at the end of hot water supply flooding out and to
stabilize the water temperature inside the sanitary water tank.
- The recirculation pump should be operated when sanitary water demand is not required.
Therefore, external time scheduler to determine when the recirculation pump should turn on
and turn off is required.
- The operating duration time of the recirculation pump is calculated as follow :
Duration time [minute] = k * V / R
k : 1.2 ~ 1.5 is recommended.
(If distance between pump and tank is far, then choose high number.)
V : Volume of sanitary water tank [liter]
R : Water flow rate of pump [liter per minute], which is determined by pump performance
curve.
- The pump operating start time should be prior to the sanitary water demand.
Water Out
Water In
Sensor
Inside water tank
holder
Water tank outer wall
Hot water supply
Sanitary
Water Tank
• If hot water mode is used, make sure to install
sensor to water tank.
• Make PT15A female bolt hole in the water tank,
and install sensor in the water tank.
• Push the sensor into the hole of the sensor holder
cap.
• Lock the sensor holder cap.
Recirculation
Pump
City water
Hydro Kit Installation Manual 15
Installation
Shower
(End of Hot
water supply)
External
Time Scheduler