LG Hydro Kit ARNH30GK1A4, Руководство по установке, Страница: 45 / 111

45
ACCESSORIES INSTALLATION
ENGLISH
General Information
Hydro Kit supports following 3way valve.
(1) : SPDT = Single Pole Double Throw. Three wires consist of Live1 (for selecting Flow A), Live 2
(for selecting Flow B), and Neutral (for common).
(2) : 'Flow A' means water flow from the unit to under floor water circuit.
(3) : 'Flow B' means water flow from the unit to DHW tank.
Yes
Selecting “Flow B” between
“Flow A” and “Flow B” (3)
Yes Selecting “Flow A” between
“Flow A” and “Flow B” (2)
230 V AC SPDT
3-wire
(1)
Supported Operating Mode Power Type
DHW Tank
Recirculation
Pump
External
Time Scheduler
Check Valve
Shower
(End of Hot
water supply)
Hot water supply
City water
Water In
Water Out
WARNING
!
Installing recirculation pump
When Hydro Kit is used with DHW tank, it is STRONGLY recommended to install
recirculation pump to prevent flooding out cold water at the end of hot water supply and to
stabilize the water temperature inside 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 x V x 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.