heater starts automatically on demand. The auxiliary heater carries out peak heating charging (anti-legionella
function) in those operating modes that permit auxiliary heat.
Buffer tank is installed for equalisation of the temperature for the heating system and to guarantee sufficient
energy when defrosting. The buffer tank volume must be 10 l/kW heat pump output (for systems with water heat-
ers). Water heater is available as an accessory.
91
52
114
100
36
51
50
112
80
62
21
80
63
64
33
10
11
10
11
53
55
77
85
87
83 80
13
12
18
40
5
71
96
5.3 System solution DHP-AQ Maxi
DHP-AQ Maxi includes the control module with supply and return pipe sensors, circulation pump, 3-way valve,
electric auxiliary heater and water heater. The heat pump produces heat, cooling and hot water. Production of
heating and hot water cannot occur at the same time because the exchange valve for heating and hot water is
positioned after the heat pump and the auxiliary heater. Hot water production is prioritised ahead of heat and
cooling. Two heating circuits can be connected, one using a shunt. The shunt is controlled by the heat pump con-
trol system. The flow line temperature is controlled with reference to the outside temperature following a set heat
curve. The additional heater starts automatically on demand. The auxiliary heater carries out peak heating charg-
ing (anti-legionella function) in those operating modes that permit auxiliary heat.
Buffer tank is installed for equalisation of the temperature for the heating system and to guarantee sufficient
energy when defrosting. The buffer tank volume must be 10 l/kW heat pump output (for systems with water heat-
ers).
Installation instructions VMGFD102 – 25
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