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Charging the System
The indoor unit is pre-charged for line sets up to 20 ft long.
Once the system has been vacuumed, if extra refrigerant is
required due to the length of the line set, it may be added before
opening the access valves. Close off the charge valve on the
refrigeration manifold set and disconnect the vacuum pump.
Connect the charge (yellow) hose to the liquid port of a
refrigerant tank and place the tank on a scale. Open the liquid
valve of the refrigerant tank and then slightly loosen the charge
(yellow) hose at the manifold until liquid comes out, then quickly
re-tighten the hose. This will ensure that no air enters the
system. Zero the scale and then add the calculated amount of
refrigerant from the tables to the right.
Once the additional charge (if any) has been added,
disconnect both hoses from the service ports of the access
valves and place the caps back on them, tighten with a wrench.
Remove the caps from the access valves and open both
valves with a hex key. Open the valves (counter-clockwise) until
they stop turning. Replace the caps and tighten with a wrench.
The system is now ready for startup. Clean up
the area, install all access panels except the one
which gives access to the electrical box. Proceed to
the Startup Section of the manual before turning the
power on to the unit.
ISSUE 03: 1-Oct-2021
TABLE 19 - Extra Charge Required
Extra charge required for line sets >20 ft (6 m)
1.1 oz per ft
TABLE 20 - Extra Charge Chart
Total
Extra
Line set
Charge
(ft)
(oz)
22
2
24
4
26
7
28
9
30
11
32
13
34
15
36
18
38
20
40
22
42
24
44
26
46
29
48
31
50
33
52
35
54
37
56
40
58
42
60
44
62
46
64
48
66
51
68
53
70
55
72
57
74
59
Page 23
0.10 kg per m
Extra
Extra
Charge
Charge
(lb)
(kg)
0.1
0.06
0.3
0.12
0.4
0.19
0.6
0.25
0.7
0.31
0.8
0.37
1.0
0.44
1.1
0.50
1.2
0.56
1.4
0.62
1.5
0.69
1.7
0.75
1.8
0.81
1.9
0.87
2.1
0.94
2.2
1.00
2.3
1.06
2.5
1.12
2.6
1.19
2.8
1.25
2.9
1.31
3.0
1.37
3.2
1.43
3.3
1.50
3.4
1.56
3.6
1.62
3.7
1.68
002291MAN-03
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