Carrier XCT 7 40VA010T7FAQEE Manual Del Propietario Y De Instalación página 13

Installation procedure
To connect the pipes to the connection kit or remove them from
the connection kit, do use both the spanner and torque wrench,
as shown in the Fig.1.
Apply ester or ether oil to inside and outside of the flare. Screw it
tight for 3 to 4 rounds and then tighten it.
Determine the tightening torque. (Excessive tightening may
damage the nuts and cause leakage)
Check the connecting pipes for gas leakage and then fix the
thermal insulation, as shown in the Fig.2
Only use the sealing gasket to wrap the part jointing the gas pipe
and the thermal insulation.
For pipe cutting and flare tools, please use R410A special tools.
<Notes>
• Please do not let any gas other than the specified refrigerant to enter the refrigeration system
• In case of refrigerant leakage during operation, please replace the gas. (Fill the refrigerant in
the outdoor unit)
Select piping material
• Ensure that both the internal surface and the external surface of the pipes are intact and are 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
outdoor 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 outdoor
Height difference between indoor and outdoor
Height difference between outdoor
(in the same system)
Height difference between indoor
Limition
Min 5, TD max 220m SD2-Fan
TD : 110m ODU below
90 ODU above
SD: 50m ODU above
40m ODU below
Connection Kit
Outdoor
Connection Kit
Apply the ester or ether oil here
Fig.1
(4~12HP) max. 150m
max. 5m
TD Max18m
SD Max 15m
refer to outdoor
Max. length 5m
DX AHU
Max. length 5m
Electrical box
Max. height drop 5m
DX AHU
11
Torque spanner
Spanner
Pipe joint
Cone nut
Note
1. Non-mixing connection : AHU
connection rate 90 ~ 100%
2. When mixing total indoor unit
connection rate is 50 ~ 110% of
which IDU share is not less than
50%