30 We reserve the right to make technical changes | 83055600dUK – Translation of the original instruction manual (HMD 2) | ait-deutschland GmbH
Operating states
Smart Grid is connected via two contacts of the EVU blocking
time, from which four possible operating states result.
EVU 1 EVU 2 Operating status
ON (1) OFF (O) 1 (= EVU blocking time)
OFF (O) OFF (O) 2 (= decreased operating mode)
The heat pump sets a new setpoint value
for the heating, which is lowered by the
value “decrease heating”. The set HR heat-
ing hysteresis applies.
Heating:
The heat pump operates in the “setpoint
value” range minus “decrease heating” +/-
HR heating hysteresis in heating mode.
NOTE
Higher decreases in temperatures can lead
to loss of comfort in Smart Grid operation.
Domestic hot water preparation:
normal preparation.
OFF (O) ON (1) 3 (= normal operating mode)
The target temperature is the set
setpoint temperature for heating water
and domestic hot water. These set
temperatures are held taking into account
the respective hysteresis.
ON (1) ON (1) 4 (= increased operating mode)
The heat pump sets a new setpoint val-
ue for the heating, which is then increased
by the ”increase heating” value. The set HR
heating hysteresis applies.
Heating:
The heat pump operates in the “setpoint
value” range plus “increase heating” +/- HR
heating hysteresis in heating mode.
NOTE
Higher increases in temperatures can lead to
loss of comfort in Smart Grid operation.
The return ow limitation temperature must
be inspected with integration of a storage
tank in series.
Domestic hot water preparation:
The heat pump sets a new setpoint value
for the hot water, which is then increased
by the ”increase hot water” value. The set
hysteresis for hot water applies.
Smart
The “Smart” menu item only appears if individual room control-
ler (extra-cost accessory) is connected to the heating- and heat
pump control and the “Smart” option is set under “room stat.”
(“Service> Settings> System settings”).
If these requirements are met, settings must be made in the
“Smart” menu in order to operate the heating and heat pump
controller conveniently via mobile iOS/Android devices.
Operating manual „alpha home“
Smart Grid
Use of the Smart Grid function requires the availability of the
Smart Grid functionality in your electricity tari as well as special
wiring.
page 31, “Terminal diagram Smart Grid“
NOTE
When the EVU disabling is applied, then the Smart Grid
function may not be activated.
NOTE
The menu item only appears if the “Smart Grid” option (
“Service> Settings”) is set to “Yes”.
Changing settings requires installer or customer service
access.
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