4 System with system control (0020232127)
14
System assistant 0020243831_00
4.2
Preparing for installation
→
uniTOWER installation and maintenance instructions, from section 4.1 onwards
→
aroTHERM installation and maintenance instructions, from section 4.1 onwards
→
Accessory set-up instructions
Work step
Selected information/measures
1
Building
►
Establishing a wall duct
2
Installation site for the outdoor unit, indoor
unit
►
Defining the installation site
►
Comply with the specific conditions for the installation site and the installation
type.
Important planning dimensions:
–
Maximum height difference between the outdoor unit and the indoor unit:
10 m
–
Basic length of the refrigerant pipes: Minimum 3 m, maximum 25 m
–
Minimum clearances and installation clearances:
→
aroTHERM installation and maintenance instructions, from section 4.5
onwards
→
uniTOWER installation and maintenance instructions, from section 4.5
onwards
3
Outdoor unit
Condition:
Depending on the installation
type/condition
►
Establishing the strip foundations
►
Mounting the wall bracket
►
Procuring and installing other accessories
►
Setting up/installing the product
Validity:
VWL 105/5 AS, VWL 125/5 AS outdoor unit
►
If required, use the transport belts that are supplied.
Condition:
Establishing the strip foundations
►
Ensure that the condensate discharge can be positioned in the centre above
the downpipe.
4
Outdoor unit
►
Installing the condensate discharge pipe
►
Ensure that condensate does not reach paths (ice formation).
5
Indoor unit
►
Setting up the product
Condition:
Optional accessory
►
Installing the installation set (hydraulics)
►
If required, separate the indoor unit into two modules.
►
Remove and dispose of the carrying straps after the unit has been set up.
4.3
Installing the refrigerant circuit
→
aroTHERM installation and maintenance instructions, from section 5.1 onwards
→
uniTOWER installation and maintenance instructions, from section 5.1 onwards
Work step
Selected information/measures
6
Outdoor unit, indoor unit
►
Preparing work on the refrigerant circuit
►
Read all of the sections on working on the refrigerant circuit.
►
Comply with the specified test pressures, waiting periods and instructions.
Tools and units:
→
aroTHERM installation and maintenance instructions, from
section 5.1 onwards
7
Outdoor unit, indoor unit
►
Routing the refrigerant pipes
►
Ensure that there is sufficient vibration decoupling.
►
Use a bending wrench and flexible springs in order to prevent kinks in the
pipeline.
►
Keep the interior of the refrigerant pipes free from air humidity, dirt and
residue.
►
Use a pipe cutter to cut the pipe to length.
►
Always hold the pipe downwards during lengthening and deburring.
►
Do not blow into the pipe (air humidity).
8
Outdoor unit, indoor unit
►
Connecting the refrigerant pipes
The outdoor unit is pre-filled with R410A refrigerant.
►
Keep the isolation valves on the outdoor unit closed.
The indoor unit is filled with nitrogen.
►
When unscrewing the flare nut, check whether you can hear the nitrogen
escaping.
9
Outdoor unit
►
Checking the refrigerant circuit for tightness
►
Only carry out the leak-tightness test on the refrigerant pipes using dry nitro-
gen.
–
Test pressure: 2.5 MPa (25 bar)
–
Waiting period: 10 mins
►
Use a leak detection spray to check the connections.
