Cooling; 4�2 Testing The Installation; Sensor Verification; Checking Actuators - Danfoss DHP-R 7Ua User Manual

In the master pump go to the menu Accessory modules. This menu contains
sub menus for each type of expansion module where connected units are
listed. Activate the units that are to be used. Even slave pumps can be activa-
ted. This makes it possible to get an alarm in the master if communication with
one of them stops working.
4�1�5 Cooling
If a cooling module has been installed as described above there is one basic
setting that has to be set. You have to define whether or not an air humidity
sensor for dew point control has been connected. Go to the menu Settings /
Cooling / Cooling circuit in the master and find the setting Dew point control
(8.10.3.2). Set this to active if the sensor is connected.
4�2 Testing the installation
Before the system is handed over to the automatic controller the functionality
of all its components should be verified. If the instructions for basic settings
have been followed the communication between heat pumps and expansion
modules has been verified at the same time. The next step is to verify that sen-
sors and actuators are working.
4�2�1 sensor verification
Many of the sensors are monitored by alarms that will indicate if the sensor
wiring is faulty. The first step is therefore to check and get rid of all alarms.
However, not all sensors have alarms, and the absence of an alarm is not a
guarantee that a sensor has been correctly installed and is working. You should
therefore check that all sensors display reasonable readings. You can do this
in the menu Information, under Temperatures. All temperatures in the system
can be viewed in this list.
4�2�2 Checking actuators
The control system has control over switching valves, shunt valves, and circula-
tion pumps. You should verify that all of these are working before letting the
controller take control. The brine pump, compressor, and radiator pump, situa-
ted inside the heat pump, can be run manually using switches on the front of the
electrical cabinet, after the front cover of the heat pump has been removed. The
main thing to check is that the phase sequence is correct for the compressor.
All other pumps and valves can be run manually by using the menu Settings /
Manual override. It contains a list of all outputs that can be controlled manually.
Select an output, set the desired manual value and then select that it should
be run manually. The output assumes the set value until changed back to auto.
To prevent outputs from unintentionally being left in manual override mode
an output will automatically revert to auto mode after 30 minutes.
34 – Danfoss