67
ACCESSORIES INSTALLATION
ENGLISH
WARNING
Installing recirculation pump
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 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.
!
DHW Tank
Recirculation
Pump
External
Time Scheduler
Check Valve
Shower
(End of Hot
water supply)
Hot water supply
City water
Water In
Water Out