20
When relocating the system to another place, fully evacuate
and seal the system.
Make sure the any additional refrigerant is added in liquid form.
Fully open the valve stem until it hits against
the stop. Do not try to open it further.
Securely tighten the valve stem cap with a
spanner.
Valve stem cap tightening torque (See
Tightening torque table on page 16).
Outdoor
unit
Indoor
unit
Flare nut
Valve
Cap
Valve body
Service valve
Flare connection
Gas side
Liquid side
A
C
D
B
Valve stem
Fig.65
Fig.66
Take caution in handling the service valve
Indoor
Unit 1 2.0 10 0 Ø 6.35 15 0
FOUR Indoor Units (2.0+2.0+2.6+7.0kW) - 5 Head Outdoor Unit pre-charged for 50m
Size
(kW)
Actual
Length
(m)
Pre-charged Pipe
Length Variance
(m)
Liquid Line
(mm)
Size
Indoor Unit
(g/m)
Charge Adjustment
System Charge
(g)
Adjustment
Unit
Unit 2 2.0 12 2 Ø 6.35 15 30
Unit 3 2.6 6 -4 Ø 6.35 15 -60
Unit 4 0 -10 Ø 6.35 15 -150
Unit 5 7.0 14 4 Ø 9.52 30 120
Total System Length 42 Total System Refrigerant Adjustment (g) -60
In this example, 60g of refrigerant is required to be REMOVED from the system. In these
REFRIGERATION
System charging (cont)
Example 2
instances, the amount of refrigerant for the ‘not connected’ indoor unit is calculated using
the
Ø
6.35mm liquid line size (i.e. 15g/m).
