Installation Manual 71
ENGLISH
Installing recirculation pump
When is used with sanitary water tank, it is STRONGLY recommended to install recircu-
lation pump to prevent flooding out cold water at the end of hot water supply 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, ex-
ternal 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.
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