Hitachi RAS-5HRNME-AF - Page 137

11. Installation conguration
TCGB0075 rev.0 - 11/2012
137
11
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Alternating Bi-valent system
The boiler is congured to alternate with the split air to water heat pump. A hydraulic separator of buffer tank has to be used
to ensure hydraulic balancing.
Example of Alternating Bi-valent system
N O T E
• T
A
:Outdoorambienttemperature(ºC).
• P
H
: Heating capacity.
• Bivalent point can be set through the LCD
user’s interface.
Air to water heat
pump Capacity
Heat Demand
Air to water heat pump
Boiler
Bi-valent point
P
H
T
A