Maytag Amana APC15 H Series Installation Instructions Manual page 12

NOTE: Do NOT adjust charge based on suction pressure unless there is a gross
undercharge.
4. Disconnect manifold set. Installation is complete.
Two Speed Application (APC1560/APH1642-60)
Run the unit on low stage cooling for 10 minutes until refrigerant pressures stabilize. Follow
the guidelines and methods below to check unit operation and ensure that the refrigerant
charge is within limits. Charge the unit on low stage.
1. Purge gauge lines. Connect service gauge manifold to access fittings. Run system at
least 10 minutes to allow pressure to stabilize.
2. Temporarily install thermometer on liquid (small) line near liquid line access fitting
with adequate contact and insulate for best possible reading.
3. Check subcooling and superheat. Two stage systems running on low stage with TXV
application should have a subcooling and superheat within the range listed on
the chart.
a. If subcooling and superheat are low, adjust TXV superheat, then check subcooling.
NOTE: To adjust superheat, turn the valve stem clockwise to increase and counter
clockwise to decrease.
b. If subcooling is low and superheat is high, add charge to raise subcooling then
check superheat.
c. If subcooling and superheat are high, adjust TXV valve superheat, then check
subcooling.
d. If subcooling is high and superheat is low, adjust TXV valve superheat and
remove charge to lower the subcooling.
NOTE: Do NOT adjust the charge based on suction pressure unless there is a gross
undercharge.
4. Disconnect manifold set, installation is complete.
Model
APC1524/APH1624H41**
APC1530/APH1630H41**
APC1536/APH1636H41**
APC1542/APH1642H41**
APC1548/APH1648H41**
APC1560/APH1660H41**
12
APC15H
Design superheat @ 95 °F
outdoor ambient temperature
Superheat
Model #
± 2°F
6 °
APC1524H41
8°
APC1530H41
12°
APC1536H41
7°
APC1542H41
10°
APC1548H41
12°
APC1560H41
APH16H
Design superheat @ 95 °F
outdoor ambient temperature
Superheat
Model #
± 2°F
15°
APH1624H41
15°
APH1630H41
10°
APH1636H41
12°
APH1642H41
15°
APH1648H41
APH1660H41 12°
TABLES 7A & 7B
Electric Heat kW
5 8 10 15
X X X
X X X
X X X
X X X
X X X
X X X
TABLE 8
Subcooling
± 2°F
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---
---
---
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12°
Subcooling
± 2°F
7°
7°
13°
13°
15°
12°
20
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X
--
X
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X
X X
X X