Carrier XCT7 Installations- Und Benutzerhandbuch Seite 19

Installation Procedures
Tubing Materials & Specifications
Model
Tubing Size (mm)
Refrigerant Filling Amount
Add the refrigerant according to the installation instruction of outdoor unit. The addition of R410A refrigerant must be
done with a measure gage to ensure the specified amount while compressor failure can be caused by filling too much
or little refrigerant.
Connecting Procedures of Refrigerant Tubing
Proceed the flare tube connecting operation to connect all the refrigerant tubes.
•Dual wrenches must be used in the connection of indoor unit tubing.
•Mounting torque refers to the following table.
Outer Diameter of Mounting Torque
Tubing (mm)
11.8(1.2kgf-m)
6.35
24.5(2.5kgf-m)
9.52
49.0(5.0kgf-m)
12.70
78.4(8.0kgf-m)
15.88
Cutting and Enlarging
Cutting or enlarging pipes should be proceeded by
installation personnel according to the operating
criterion if the tube is too long or flare opening is
broken.
Vacuumizing
Vacuumize from the stop valve of outdoor units with
vacuum pump. Refrigerant sealed in indoor machine is
not allowed to use for vacuumization.
Open All Valves
Open all the valves of outdoor units. [NB: oil balancing
stop valve must be shut up completely when
connected to the main unit.]
Checkup for Air Leakage
Check if there is any leakage at the connecting part
and bonnet with hydrophone or soapsuds.
40VL007~009R-7G-QEE
Gas pipe
Liquid pipe
Increase mounting
(N-m) Torque (N-m)
13.7(1.4kgf-m)
29.4(3.0kgf-m)
53.9(5.5kgf-m)
98.0(10.0kgf-m)
9.52
6.35
Connecting
The connecting method of circular
terminal is shown in the Fig. Take off the
screw, connect it to the terminal tier after heading
it through the ring at the end of the lead and then
tighten it.
Connecting straight terminals:
The connection method for the circular terminals is
as follows: loosen the screw before putting the line
terminal into the terminal tier, tighten the screw and
confirm it has been clamped by pulling the line gently.
Pressing connecting line
After connecting line is completed, press the
connecting line with clips which should press on the
protective sleeve of the connecting line.
correct
pressing
11
40VL012R-7G-QEE
12.7
6.35
wrench
Connecting
circular terminals:
terminal tier
pressing clip
enlarge
view
wrong
pressing