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

9.5

Test Operation

Caution! The installation may only be commissioned if the heating system and water heater have been
filled and excessive air expelled from the pipes. Otherwise the circulation pump can be damaged.
Caution! Any alarms that may occur in connection with the installation must be fault-traced.
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
9.6

After start-up and tests

Note! Remember that it takes time for the heat pump to heat a cold house. It is best to let the heat pump
work at its own pace and NOT raise or alter any values in the control system to try to heat it up more
rapidly.
Caution! If there is an alarm in conjunction with installation it usually means that there is air in the system.
Caution! In the event of longer periods of downtime and risk of ice build-up in the system, the heat pump
must be drained of water.
9.6.1 Adaptation to the heating system
If the circulation pump is used with a fixed pump speed the heat pump settings must be adjusted to the applica-
ble heating system, for instance an underfloor heating or radiator 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.
9.6.2 Change operating mode
How to change the operating mode and other parameter values is described in the User manual.
9.6.3 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 commissioned 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. While 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.
Noise is produced from the heat pump when the fan is in operation, check during manual operation that there is
no disturbance in your own home as well as none caused to any neighbours.
Installation and service instructions VMGFI202 – 29