Bosch Geothermal Heat Pumps Applications Manual page 112

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17.5 Direct Digital Control (DDC)
Speci c models of 208/230V Bosch geothermal heat
pumps are available with an optional Direct Digital Control.
The Direct Digital Control board also known as DDC
(Fig. 132) is used for con gure to order applications.
It is BACnet® native which makes it exible and easy to
integrate into existing Building Automation Systems (BAS).
The controller provides the end user with a superior
amount of information when compared to a traditional
thermostat. The controller is programmed in the factory
with software versions that suit the different application
for the models offered by Bosch. User settings such as the
time and schedules can be preprogrammed or also change
during the installation of the product.
The controller should be installed on the right side of
the unit; mounting holes are available on the DDC panel
behind the electrical box as shown (Figure 164).The DDC
kit includes all the necessary components required for the
installation.
Installers should follow these steps to mount the DDC
controller on the side of the Bosch geothermal unit:
f
Align the controller with the pilot holes as shown (Fig.
133)
f
Secure controller to unit by using (#10) provided
screws
Fig. 133
Data subject to change
Fig. 132 Direct Digital Control
For horizontal units, remove the DDC panel and install the
sensors rst as directed in the Install sensors section of
the Bosch DDC manual (available from Bosch).
Applications Manual
Bosch Thermotechnology Corp.