Piping Installation; Safety Valves; System Solution - Danfoss DHP-AX Installation And Service Instructions Manual

5

Piping installation

D B BB
NOTE! To prevent leaks, ensure that there are no
stresses in the connecting pipes!
D B BB
NOTE! It is important that the heating system
is bled after installation. Bleed valves must be
installed where necessary.
D B BB
Piping installation must be carried out in accord-
ance with applicable local rules and regulations.
The hot water tank must be equipped with an
approved safety valve (supplied).
BB E B
T he pipes between the heat pump various units
should be isolated.
BB E B
E nsure that the piping installation follows the
dimension and connection diagrams in Section 3
Heat pump information.
BB E B
T he position lists show the components and
parts included in the delivery in italics.
D B BB
Radiator systems with closed expansion tanks
must also be supplied with approved pressure
gauges and safety valves.
D B BB
Cold and hot water pipes as well as overflow
pipes from safety valves must be made of heat
resistant and corrosion-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.
D B BB
The connecting pipe between the expansion
tank and the safety valve must slope continu-
ously upwards. A continuous upwards slope
means that the pipe must not slope downwards
from the horizontal at any point.
5.1

System solution

In a VL system the heat pump can produce both heat-
ing and hot water with the compressor and the auxiliary
heater.
Production of heating and hot water cannot occur at the
same time because the exchange valve for heating/hot
water is positioned after the auxiliary heater.
The auxiliary heater carries out peak heating charging
(anti-legionella function) in those operating modes that
permit auxiliary heat.
12 – Installation
Buffer tank
The buffer tank equalises the temperature to the heating
system during operation and after defrosting.
BB E B
T he recommendation for the volume is that 10
litres/kW installed heat pump output for heat
pumps with heater and 20 litres/kW for heat
pumps without heater.
VMBMH302