Carrier 40VA003D7FAQEE Installations- Und Benutzerhandbuch Seite 14

Installation procedure
To connect the pipes to the connection kit or remove them from the connection
kit, use both a spanner and torque wrench, as shown in Fig.1.
Apply ester or ether oil to inside and outside of the flare. Screw it for 3 to 4
rounds manually and then tighten it.
Determine the tightening torque. (Tightening too much may damage the nuts
and hence cause leakage)
Check the connecting pipes for gas leakage and apply the thermal insulation,
as shown in the in the Fig.2
Only use the sealing gasket to wrap the part joint between the gas pipe and
thermal insulation.
For the pipe cutter and flare tool, please use R410A special tools.
<Notes>
• Please do not let any type of gas other than the specified refrigerant enter the refrigeration system.
• In case of refrigerant leakage during operation, please replace the gas. (Fill the refrigerant at the
outdoor unit).
Select piping material
• Make sure both the internal surface and external surface of the pipes are intact and free from harmful contaminants such as sulphur, oxide,
foreign matter, cutting powder, grease and water.
• Please use the following materials for refrigerant pipe.
Description
From Outdoor unit to AHU valve
Height difference and length from AHU to AHU
valve
Height difference between Oudoor unit and AHU
valve
Height difference between AHU Valve and Indoor
units
Single way total pipe length
Main pipe between outdoor to 1st branch
Pipe length between outdoors
Height difference between indoor and outdoor
Height difference between outdoors (in the same
system)
Height difference between indoors
Outdoor
• The branching pipe for the pipe must have refrigerant branching suite. For selection of refrigerant branching suite and max. height drop between
indoor units, please refer to the installation instructions or technical data attached to the outdoor unit.
Limitation
Min5,
TD max.220m
SD 2-Fan(4~12HP)
max.150m
max. 5m
TD:110m ODU below 90m ODU above
SD:50m ODU above 40m ODU below
TD Max18m
SD Max15m
Max. length 5m
Connection Kit
Max. length 5m
Connection Kit
13
Paste the ester or ether oil here
Fig.1
Note
1.Non-mixing connection: AHU
connection rate 90 ~ 110%
2. When mixing total indoor unit
connection rate is 50 ~ 110%, of
which IDU share is not less than 50%
Refer to outdoor
DX AHU
Electrical box
DX AHU
Torque spanner
Spanner
Pipe joint
Cone nut