Piping Installation; Safety Valves; Connection Heating And Hot Water - Danfoss DHP-A Installation Manual

Installation Guide
5

Piping installation

Warning
Warning
Caution
Caution
Caution
N
N
5.1

Safety valves

Warning
Warning
Warning
5.2

Connection heating and hot water

20
Domestic heat pumps
As the water temperature in DHP-H Opti Pro and DHP-L Opti Pro becomes extremely hot, a mixer valve must
be installed between the cold water and hot water pipes to ensure a lower domestic hot water temperature.
Alternatively the maximum hot water temperature must be reduced in the Service menu.
Danfoss SP (1-phase) heat pumps have a factory installed safety valve for temperature and pressure, (10 bar
90-95°C), in accordance with the requirements in Great Britain. This valve is located in the water tank and may
not be used for any purpose other than connecting the outlet pipe. Also note that for heat pump DHP-H Opti
Pro SP and DHP-L Opti Pro SP it is imperative that the hot water temperature is changed from default setting
95°C to 85°C.
Piping installation must be carried out in accordance with applicable local rules and regulations. The hot wa-
ter tank must be equipped with an approved safety valve.
To prevent leaks, ensure that there are no stresses in the connecting pipes!
It is important that the heating system is bled after installation. Bleed valves must be installed where necessa-
ry.
Ensure that the pipe installation is carried out in accordance with the dimensions and connection diagrams.
Configure the heat pump for the desired system solution in the SERVICE\ADD. HEATER\EXTERNAL ADDITION
menu.
Radiator systems with a closed expansion tank must also be equipped with an approved manometer and
safety valve, minimum DN 20, 1.5 bar opening pressure, or according to country specific requirements.
Cold and hot water pipes and overflow pipes from safety valves must be made of heat resistant and corro-
sion-resistant material, e.g. copper. The safety valve overflow pipes must have an open connection to the
drain and visibly flow into this in a frost-free environment.
The connecting pipe between the expansion tank and the safety valve must slope continuously upwards. A
continuous upwards slope means that the pipe must not slope downwards from the horizontal at any point.
VMGFQ102 Danfoss Heating Solutions