Thermia ATEC Commissioning

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?
A
D
C
B
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. Atec Standard and
Atec Plus
l 120 180 220 260 320 360
Min water volume in heating system. Atec Total l 60 90 110 130 160 180
N
If the amount of water in the heating system is not sufficient, Low Pressure alarms may occur.
For Atec Total, also check:
Water heater checklist OK Not OK
Bleed valve installed
For Atec Standard, also check:
External Water heater checklist OK Not OK
Exchange valve installed (factory installed in Atec Plus and Atec Total)
Commissioning Atec
VIGFG102 Thermia Värmepumpar
6

Thermia ATEC Specifications

General

Brand	Thermia
Model	ATEC
Category	Heat Pump
Language	English