Installing Recirculation Pump; Setting Temperature Unit - LG ARNH963K2A2 Installation Manual

Installing recirculation pump

WARNING :
When Hydro Kit is used with the DHW 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 DHW tank.
- The recirculation pump should be operated when DHW 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 DHW tank [liter]
R : Water flow rate of pump [liter per minute], which is determined by pump performance curve.

Setting temperature unit

• The initial setting :
Please to be displayed in Fahrenheit.
Hot water supply
Water Out
Water In
DHW Tank
Recirculation
Pump
City water
Hydro Kit Installation Manual 51
Test Run
Shower
(End of Hot
water supply)
External
Time Scheduler