Commissioning; Checking Piping Installation And Heating System; Checking Electrical Installation; Filling Hot Water Tank And Heating System And Expelling Excessive Air - Danfoss DHP-AT Installation And Service Instructions Manual

9

Commissioning

Note! Read the safety instructions!
Before filling water in the heating system or turning on the power, the installation must be checked for safety
and functional capability.
9.1

Checking piping installation and heating system

Pipe connections in accordance with the system solution.
•
Flexible hoses on the supply and return lines
•
Pipe insulation
•
Strainer on return line
•
All excessive air has been expelled from the heating system
•
All radiator valves fully open
•
Expansion tank heating system (not included in the delivery)
•
Safety valve for expansion tank
•
Filler valve with non-return valve heating system (not included in the delivery)
•
Safety valve for cold water (not included in the delivery)
•
If an external domestic hot water heater is installed, also check:
Exchange valve
o
Bleed valve (not included in the delivery)
o
9.2

Checking electrical installation

•
Circuit-breaker (not included in the delivery)
•
Fuse protection
•
Positioning of the outdoor sensor
•
Communication cable between heat pump and operator panel/control unit.
9.3

Filling hot water tank and heating system and expelling excessive air

1. Fill the water heater/hot water tank with cold water by opening the filler valve that is on the valve pipe.
2. Expell all excessive air by opening one of the hot water taps.
3. Then fill the water heater coil and the heating system with water through the filling valve to a pressure of
approximately 1 bar.
4. Open all radiator valves fully.
5. Expell all excessive air from the radiators.
6. Refill the heating system to a pressure of approximately 1 bar.
7. Repeat the procedure until all air has been expelled.
8. Check the system for leakage.
9. Leave the radiator valves fully open.
9.4

Starting the unit

1. Ensure that the main circuit breaker is on.
2. Press
The displays shows the current status of the heat system.
After the power has been turned on to the heat pump, the system starts in house heating/DHW AUTO mode with a
desired room temperature as set in MENU 02 (see the default settings in the user manual).
28 – Installation and service instructions VMGFI202
on the keypad.