6
75
60
50
43
37
N/R
N/R
N/R
N/R
N/R
N/R
N/R
N/R
118
95
79
68
59
53
47
N/R
N/R
N/R
N/R
N/R
N/R
188
150
125
107
95
83
75
68
63
58
54
N/R
N/R
301
241
201
172
150
134
120
109
100
93
86
80
75
471
376
314
269
235
209
188
171
157
145
134
125
118
N/R = NOT RECOMMENDED
Wire ampacity and voltage drop calculation based on copper conductors with 75 degree C insulation per
1996 National Electrical Code (NEC) Conductors in 86 degree F ambient.
See NEC for ampacity derating for higher ambients.
27.5
30
12.5
15
17.5
20
MAXIMUM ALLOWABLE WIRE LENGTH IN FEET TO LIMIT VOLTAGE DROP TO 2%
10
MINIMUM CIRCUIT AMPACITY OF OUTDOOR UNIT (MCA)
40
32.5
35
37.5
WIRE SIZE
(AWG)
22.5
25
6
14
12
10
8
TABLE 1
This table is provided as a guide only. Wire sizing may be regulated by local codes.
Local inspection is the final authority on wire sizing.
WARNING
To avoid personal injury or death, open
each valve only until it touches the retainer.
To avoid loss of refrigerant, do not apply
pressure to the retainer.
The outdoor unit is factory charged with enough R-22 for
the matching indoor blower coil or matching A coil plus 25
feet of 3/8 inch liquid line. Add or subtract 0.60 oz. of R-22
per foot of 3/8" liquid line for any difference from 25 feet.
For line sets over 50 feet consult an Amana distributor.
IMPORTANT: Use only refrigerant which is certified to
meet ARI Standard 700. Used refrigerant may cause
compressor damage, and will void the warranty. (Most
portable machines cannot clean used refrigerant well
enough to meet this ARI Standard.)
IMPORTANT: If adding refrigerant to a system, add only
refrigerant vapor (not liquid) through the suction valve (low
side) on the outdoor unit. Any other practice may cause
compressor damage.
Final Charge Adjustment - Cooling Operation
Final charge adjustment must be performed when the
outdoor temperature is 60°F or higher:
1.
Set the room thermostat to “COOL”.
2.
Set the fan switch to “AUTO”.
3.
Set the temperature control well below room temper-
ature.
4.
Turn the power on.
5.
Let the system run for 15 - 20 minutes, or until
pressures are stabilized.
6.
Measure the high side pressure from the liquid line
service valve port.
7.
Measure the low side pressure from vapor line ser-
vice valve port (for superheat value at outdoor unit).
LIQUID LINE
SERVICE VALVE
VAPOR LINE
SERVICE VALVE
LOW SIDE
GAUGE PORT
Figure 4
ID Coil with Expansion Valve:
At stabilized cooling conditions and with an outdoor tem-
perature of 60°F or higher, the system should have from
9°F to 13°F subcooling at the outdoor unit liquid line
service valve. If you have less than 9°F subcooling, add
charge. If you have more than 13°F subcooling, remove
charge.
ID Coil with Orifice:
For a proper superheat reading, measure the refrigerant
pressure and temperature at the outdoor unit vapor line
service valve. The superheat should be within 3°F of that
shown on the chart on page 8. If the superheat is higher,
add charge. If the superheat is lower, remove charge.
