Test Operation; After Start-Up And Tests - Danfoss DHP-AT Installation Manual

Installation Guide
* Should not be modified.
9.6

Test Operation

Caution
Caution
Test operate and, at the same time, check the following functions of the components in the heat system:
▪ Flows and actuators
▪ Circulation pump is running
▪ Compressor is running
▪ Reversing valve, hot water switches from house heating/cooling to DHW
▪ External electrical heater starts as required
▪ Hot water tank electrical heater starts as required
▪ Fan
▪ Internal electrical heater starts as required
9.7

After start-up and tests

N
Caution
Caution
Adaptation of the heating system
The delta temperature (the difference between the supply line and return line) should be 7–10°C. If this is not reached, the flow of the
circulation pump may need adjusting depending on the applicable heating system.
Change operating mode
How to change the operating mode and other parameter values is described in the User manual.
Noise check
During transportation and installation there is a certain risk that the heat pump can be damaged, components may move or get bent
and this can cause noise. Because of this it is important to check the heat pump when it has been installed and is ready to be commis-
sioned to ensure that everything is in order. Test operate the heat pump in both heating and hot water modes to ensure that there is no
abnormal noise. Whilst doing this, check that there is no abnormal noise in other parts of the house because unwanted noise can occur
in rooms other than the one where the heat pump is located.
Tuning the heating system
To obtain a heating system balance and obtain an even and comfortable indoor temperature, the heating system must be adjusted
according to the example below.
30
DHP-AT
The installation may only be commissioned if the heating system and water heater have been filled and ex-
cessive air bled from the system. Otherwise the circulation pump can be damaged.
Any alarms that may occur in connection with the installation must be fault-traced.
Remember that it takes time for the heat pump to heat up a cold house. It is best to let the heat pump work at
its own pace and NOT alter any values in the control system to try to heat up the house more rapidly.
If there is an alarm in conjunction with the installation, it usually means that there is air in the system.
In the event of longer periods of downtime and risk of freezing in the system, the heat pump must be drained
of water.
VMGFI302 Danfoss Heating Solutions