Accessories Installation
36
Air-to-Water Heat Pump
How to wire sanitary water tank heater
Step 1.
Uncover heater cover of the sanitary water tank. Heater is located
inside of the tank.
Step 2.
Find terminal block in the water tank kit and connect wires as
below. Wires are field-supplied item.
(L) : Live signal from Water tank kit to heater
(N) : Neutral signal from Water tank kit to heater
Wire specification
• Cross-sectional area of the wire should be 5 mm
2
.
Adjusting thermostat temperature
• To guarantee proper operation, it is recommended to set temperature of
thermostat to maximum temperature (symbol at the picture).
(L)
(N)
A
Terminal block
in the water
tank kit
BR
BL
3
L
4
N
Installing recirculation pump
When is used with sanitary water 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 the sanitary water tank.
- The recirculation pump should be operated when sanitary water 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 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.
Recirculation
Pump
External
Time Scheduler
Check V alve
Shower
(End of Hot
water supply)
Hot water supply
City water
Sanitary
Water Tank
Water Tank
Sensor
Water In
Water Out
How to install sanitary water tank
For more detail information about installing sanitary water tank, please refer installation manual
provided with sanitary water tank.
WARNING
WARNING
[PHLTB]