Carrier XCT7 Installations- Und Benutzerhandbuch Seite 29

Installation Procedure
D. Additional refrigerant charging
Charge the additional refrigerant in the liquid state with a gauge.
If the additional refrigerant is not charged fully, it can be charged during the trial mode when the compressor of the
outdoor unit is not running. If the unit runs for a long period with insufficient refrigerant, the compressor will experience
failure.
(The charging must be completed within 30 minutes particularly when the unit is running, in the mean time charge the
refrigerant)
The outside unit is partly charged with the refrigerant at the factory, it will require additional refrigerant charging at the
installation site.
W1: Refrigerant charging volume for the outdoor unit at the factory.
W2: Refrigerant charging volume for the outdoor unit on site.
W3: Refrigerant charging volume at liquid pipe base as per different piping length calculation. W3=actual length of
liquid pipe x additional amount per meter liquid pipe=
(L1x0. 52)+(L2x0.35) +(L3x0.25) +(L4x0.17) +(L5x0.11) +(L6x0.054) +(L70.022)
L1: Total length of 25.4 liquid pipe
L2: Total length of 22.22 liquid pipe
L3: Total length of 19.05 liquid pipe
L4: Total length of 15.88 liquid pipe
L5: Total length of 12.7 liquid pipe
L6: Total length of 9.52 liquid pipe
L7: Total length of 6.35 liquid pipe
Total refrigerant volume charging on site during installation=W2+W3 W: Total refrigerant volume charging on site for
maintenance.
W1:
Refrigerant
charging volume
Model for the outdoor
unit at the
factory
8HP 8.5
10HP 8.5
12HP 8.5
14HP 10
16HP 10
18HP 10
20HP 10
22HP 10
24HP 10
26HP 10
Note:
• To prevent the oil from entering the pipe, please use the special tool for R410A, especially for the gauge manifold and charging
hose.
• Mark the refrigerant type in a different colour on the tank. R410A is pink.
• Do not use the charging cylinder, because the composition of R410A will change when transferred to a cylinder.
• When charging the refrigerant, the refrigerant should be taken out from the tank in a liquid state.
• Mark the counted refrigerant volume according to the distributing pipe length on the label.
• This product contains fluorinated greenhouse gases in a hermetically sealed system. Do not vent into the atmosphere. Refrig-
erant type: R410A. See the above table for the mass of charged refrigerant. GWP (Global Warming Potential): 2088.
• A leak check for refrigerant should be carried out every 12 months and only by qualified personnel certified in accordance
with the European rules.
Refrigerant record form
W2: W3: Refrigerant charging volume for liquid pipe
Refrigerant base as per different piping length calculation
charging
volume for the
outdoor unit
Liquid pipe diam-
on site
eter (mm)
0 Ø 6.35
0 Ø 9.52
0 Ø 12.7
0 Ø 15.88
0 Ø 19.05
0.5 Ø 22.22
4 Ø 25.4
4.5
4.5
5
Additional refrigerant amount
(kg)
0.022kg/mx _m= _kg
0.054kg/mx _m= _kg
0.11kg/mx _m= _kg
0.17kg/mx _m= _kg
0.25kg/mx _m= _kg
0.35kg/mx _m= _kg
0.52kg/mx_m= _kg
W3=_kg
22
Total refrigerant W: Total refrigerant
volume charging volume charging on
on site during site for maintenance
installation
W2+W3=_kg W1+W2+W3=_kg