89
ACCESSORIES INSTALLATION
ENGLISH
Recirculation
Pump
External
Time Scheduler
Check Valve
Shower
(End of Hot
water supply)
Hot water supply
City water
DHW
Water Tank
Water Tank
Sensor
Water In
Water Out
Installing recirculation pump
- For 3 Series
When
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 / R
k : 1.2 ~ 1.5 is recommended. (If distance between pump and tank is far, then choose high
number)
V : Volume of DHW 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 DHW water demand.
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Water In / Water Out installation scene may vary depending on the model.