20
18-AC125D1-1A-EN
STEP 6
- Adjust refrigerant level to attain proper
gage pressure.
Add refrigerant
if the Liquid Gage Pressure is
lower than the chart value.
1. Connect gages to refrigerant bottle and
unit as illustrated.
2. Purge all hoses.
3. Open bottle.
4. Stop adding refrigerant when liquid line
temperature and Liquid Gage Pressure
matches the charging chart Final
Subcooling value.
Recover refrigerant
if the Liquid Gage Pressure
is higher than the chart value.
20 MIN.
STEP 7
- Stabilize the system.
1. Wait 20 minutes for the system condi-
tion to stabilize between adjustments.
Note:
When the Liquid Line Temperature and
Gage Pressure approximately match the chart,
the system is properly charged.
2. Remove gages.
3. Replace service port caps to prevent
leaks. Tighten finger tight plus an
additional 1/6 turn.
STEP 8
- Verify typical performance.
Refer to System Pressure Curves at the end of
the document to verify typical performance.
PRESSURE CURVE SAMPLE
Cooling @ 1450 SCFM
Heating @ 1350 SCFM
DI
SCHARG
E
PRESSURE
(PS
IG)
OUTDOOR TEMPERATURE (Degree F)
SUCT
IO
N
PRESSURE
(PSI
G)
110
115
120
125
130
135
140
145
150
155
160
165
170
40
60
80
100
120
200
250
300
350
400
450
500
550
40
60
80
100
120
(1)
(1)
(3)
(3)
(5)
(4)
(2)
(2)
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
30
40
50
60
70
80
90
100
110
120
130
140
-5
5
15
25
35
45
55
65
200
250
300
350
400
450
500
-5
5
15
25
35
45
55
65
INDOOR ENTERING
DRY BULB CURVES
TOP TO BOTTOM
80, 70, AND 60 DEG F.
INDOOR ENTERING
DRY BULB CURVES
TOP TO BOTTOM
80, 70, AND 60 DEG F.
Содержание 4TTX7
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Страница 26: ...26 18 AC125D1 1A EN PRINTED FROM D157615P04 REV A 2 3 Ton Units...
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Страница 28: ...28 18 AC125D1 1A EN 4 Ton Units...
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Страница 30: ...30 18 AC125D1 1A EN 5 Ton Units...
