2
Checking piping and electrical installation
2.1
Checking the piping installation
Before filling the heating system, check the piping installation according to the checklist below.
For further information, also see the Installation Quick Guide.
Piping checklist
OK
Not OK
Are the pipe connections in accordance with the connection diagram.
Are the flexible hoses on the supply and return lines installed on the outdoor unit?
Is the strainer on return line mounted? See figure 1
Is an expansion vessel installed?
Is a valve-pipe with safety valve and manometer installed?
Is a volume tank installed? See
Volume tank table below
Is a filler cock with non-return valve heating system installed?
"
#
$
%
Fig. 1: Strainer
A: Stopcock
B: Cover
C: Strainer
D: O-ring
Warning
In order to secure the defrosting of the outdoor unit, a minimum amount of water must be contained in the
heating system. This is shown in the table below.
If the heating system itself holds the amount of water described in the table, a volume tank is not needed, but recommended.
Volume tank table
Unit
6 kW
9 kW
11 kW
13 kW
16 kW
18 kW
Min water volume in heating system. DHP-AQ Mini and
DHP-AQ Midi
l
120
180
220
260
320
360
Min water volume in heating system. DHP-AQ Maxi
l
60
90
110
130
160
180
!
If the amount of water in the heating system is not sufficient, Low Pressure alarms may occur.
For DHP-AQ Maxi, also check:
Water heater checklist
OK
Not OK
Bleed valve installed
For DHP-AQ Mini, also check:
External Water heater checklist
OK
Not OK
Exchange valve installed (factory installed in DHP-AQ Midi and DHP-AQ Maxi)
Commissioning
VIGFH102
Danfoss Heating Solutions
6
