Alpha-InnoTec RBE - Cooling Release; Heat Distribution System; Adjustment of the Return Setpoint Temperature under Room Temperature Influence

783032600bUK– Translation into English of the original German operating manual – Subject to technical change without notice.
COOLING RELEASE
Here there are 2 options for releasing and activating cooling:
• Purely according to outdoor temperature
If the outdoor temperature release that has been set is exceeded over the
dened time period the heat pump switches to cooling mode.
RBE operating manual, see “Cooling”
Trained installers' operating manual, see “Cooling – Setting the
parameters”
Comfort circuit board operating manual, see “Comfort cooling –
Setting the parameters”
• According to outdoor temperature & room temperature
inuence
If the room temperature release that has been set is exceeded over
the dened time period the heat pump control checks the outdoor
temperature release. If the outdoor temperature release is also available
the heat pump switches to cooling mode.
RBE operating manual, see “Cooling”
HEAT DISTRIBUTION SYSTEM
The heat distribution system parameter limits the maximum adjustment
of the return setpoint temperature of the heat pump control:
• Underoor heating max. +/- 2K
• Radiators / fan coils max. +/- 4K
ADJUSTMENT OF THE RETURN SETPOINT TEMPERATURE
UNDER ROOM TEMPERATURE INFLUENCE
The room temperature inuence is basically calculated using the
following formula:
(t
Room setpoint
– t
Room actual
) * f
RT
= T
RL
setpoint adjustment
t
Room setpoint
= room setpoint temperature
t
Room, actual
= current room temperature
f
RT
= inuencing factor RT 0…200%
T
RL
setpoint = return setpoint temperature in the heat
pump control
NOTE
Control with room temperature inuence is compatible with heating and
cooling mode. Maximum ow and return temperature limits for heating
and cooling remain active in order to protect the components integrated
in the system.
The following shows 3 examples in which the control principle is illustrated:
Example 1:
Increasing the return setpoint temperature in heating mode:
Return setpoint temperature = 28°C
Underoor heating
Room temperature = 19°C
Room setpoint temperature = 22°C
Inuencing factor selected in the heat pump controller: 50%
(22°C - 19°C) * 50% = 1.5K
--> check < 2K --> YES --> Return setpoint adjustment --> 29.5°C
Example 2:
Lowering the return setpoint temperature in heating mode:
Return setpoint temperature = 30°C
Underoor heating
Room temperature = 22°C
Room setpoint temperature = 20°C
Inuencing factor selected in the heat pump controller: 50%
(20°C - 22°C) * 50% = - 1K
--> check < 2K --> YES --> Return setpoint adjustment --> 29°C
Example 3:
Lowering the ow temperature (mixing circuit) in cooling mode:
Flow temperature, mixing circuit, cooling = 18°C
Underoor heating
Room temperature = 24°C
Room setpoint temperature = 22°C
Inuencing factor selected in the heat pump controller: 50%
(22°C - 24°C) * 50% = - 1K
--> Check < 2K --> YES --> Cooling ow temperature adjustment
--> 17°C --> if minimum cooling ow temperature 17°C allowed
--> yes --> if not, no adjustment!