Viessmann Vitocal 200-S Installation And Service Instructions Manual page 20

Installation sequence
Connecting refrigerant lines
!
Please note
Contamination (e.g. metal swarf) or moisture in
the copper pipes of the refrigerant lines will
cause the appliance to malfunction.
Hold the pipe openings downwards or tempora-
rily plug them.
Note
The refrigerant lines of the internal unit are filled with
nitrogen; positive pressure 1 to 2 bar (0.1 to 0.2 MPa).
1. Undo the nuts from refrigerant connections
.
D
Type AWB/AWB-AC 201.B04:
Replace nuts with union nuts supplied:
⁷⁄₁₆ UNF for liquid line
■
■ UNF for hot gas line
¾
Connect supplied reducer with copper sealing ring.
Type AWB/AWB-AC 201.B05 to B13, 201.C10 to
C16:
Push the nuts onto the relevant refrigerant lines
from the external unit.
Tighten the nuts with the following torque:
Type AWB/ Line
AWB-AC
201.B04 Liquid line
Hot gas line
201.B05 Liquid line
Hot gas line
201.B07 Liquid line
Hot gas line
201.B10 Liquid line
Hot gas line
201.B13 Liquid line
Hot gas line
201.C10 Liquid line
Hot gas line
201.C13 Liquid line
Hot gas line
201.C16 Liquid line
Hot gas line
20
(cont.)
and
C
6 mm
7
12 mm
7
10 mm
7
16 mm
7
10 mm
7
16 mm
7
10 mm
7
16 mm
7
10 mm
7
16 mm
7
10 mm
7
16 mm
7
10 mm
7
16 mm
7
10 mm
7
16 mm
7
2. Flare the pipe ends of the refrigerant lines.
Note
If solder fittings are used, solder the fittings using a
shielding gas.
3. Fit refrigerant lines and insulate them to provide
protection from heat and vapour diffusion.
Connection to inter-
nal unit
UNF
⅝
with reducer
x ⁷⁄₁₆
⅝
UNF
⅞
with reducer
x
⅞ ¾
UNF
⅝
UNF
⅞
UNF
⅝
UNF
⅞
UNF
⅝
UNF
⅞
UNF
⅝
UNF
⅞
UNF
⅝
UNF
⅞
UNF
⅝
UNF
⅞
UNF
⅝
UNF
⅞
Torque in Nm
33 to 42
14 to 18
63 to 77
50 to 62
33 to 42
63 to 77
33 to 42
63 to 77
33 to 42
63 to 77
33 to 42
63 to 77
33 to 42
63 to 77
33 to 42
63 to 77
33 to 42
63 to 77