12
Subject to change without notice | 83024000bUK – Translation of the original operating manual | ait-deutschland GmbH
7 Electrical installation
Establishing the electrical connections
ATTENTION
Irreparable damage to the compressor due to wrong
rotating field!
► Ensure a clockwise rotating field for the compres
-
sor’s load supply.
Basic information relating to the electrical
connection
● Any specifications by the local energy supply
company apply to electrical connections
●
Equip the power supply for the heat pump with an
all-pole circuit breaker with at least 3 mm contact
spacing (according to IEC 60947-2)
● Note the tripping current level (
“Technical data /
scope of supply”, page 17)
●
Comply with the electromagnetic compatibility
regulations (EMC regulations)
●
Install unshielded power supply cables and
shielded cables (bus cables) sufficiently far apart
(> 100 mm)
Connecting the heat pump module to
the hydraulic module, the hydraulic station
or the wall-mounted controller
The connection is established using the EVS 8 or EVS
accessory.
●
EVS 8 load and bus connector with 8 m cable.
(Can be extended inside buildings with a maxi
-
mum of 2 additional EVS 8)
EVS 8 installation instructions
●
EVS: Load and bus connector.
Cable on site, maximum cable length of 30 m.
The bus cable must be a shielded cable of at least
4 x 0.5 mm².
As load line:
●
For the 12 kW unit a 5 x 2.5 mm² cable with
protective conductor
●
For the 8 kW unit a 3 x 2.5 mm² cable with pro-
tective conductor
EVS installation instructions
1. Route the two plug-in connections of the load and
bus cables to the slots on the heat pump module.
2. Join the connections.
3. Fit the cover for the plug connections.
8
Flushing, filling and venting
8.1 Heating water quality
NOTE
●
Detailed information is also provided in VDI
Guideline 2035 “Vermeidung von Schäden
in Warmwasserheizanlagen” (Avoiding
damage to hot water heating systems)
●
Required pH value: 8.2 … 10
●
For aluminium materials:
pH value: 8.2 … 8.5
►
Fill the system with deionised heating water
(VE water) or with water corresponding to VDI
2035 only (low-salt operation of the system).
Advantages of low-salt operation:
●
Low corrosion properties
●
No development of scale
●
Ideal for closed heating circuits
● Ideal pH value due to self-alkalinisation after fill
-
ing the system
