Amana APG1624060M41 Installation Instructions Manual Download Page 14

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d. If subcooling is high and superheat is low,

adjust

TXV valve superheat and

remove

charge to lower the subcooling.

NOTE:

NOT

adjust the charge based on suction pressure unless there is a gross undercharge.

4. Disconnect manifold set, installation is complete.

Refrigerant Charge Check (Units with Fixed Orifice Devices)

After completing airflow measurements and adjustments the unit’s
refrigerant charge must be checked. All package units with fixed orifice
devices are charged using the super heat method at the compressor
suction line.
After superheat is adjusted it is recommended to check unit sub-cooling
at the condenser coil liquid line out. For charge adjustments, see
superheat and subcooling charts shown for each model.

YSTEM

HARGING

EATING

ODE

The proper method of charging a heat pump in the heat mode is by
weighing the charge according to the total charge listed on the rating
plate.
Measure the hot gas discharge at the compressor to ensure proper TXV setting. To ensure optimum system performance in heat
mode, the TXV may require adjustment.

1. Allow the system to operate for at least 20 minutes.

2. Attach and insulate an electronic thermometer to the hot gas discharge line mid-way between the compressor and the

reversing valve.

NOTE:

The thermometer must be well insulated to prevent ambient influences.

3. Allow the compressor to operate for about 10 additional minutes and measure the hot gas discharge temperature.

4. Using an additional electronic thermometer, measure the ambient temperature.

5. Adjust the TXV until the hot gas temperature equals 100°F + ambient temperature (+ or - 3°F). Close TXV to increase the

temperature.

NOTE:

When adjusting the TXV, allow the compressor to operate for about 10 minutes before taking readings. Do not adjust

TXV more than 1/4 of a turn between readings.

ELECTRICAL ADJUSTMENTS

This series of electric cooling and, heat pump package equipment is designed
to accept a field installed electric heat kit. The unit is equipped to easily install
the HKP or HKR Series Electric Heat Kit. Full Installation Instructions are included
in this kit. Please use this document for guidance in field equipping the package
unit with electric heat.
Choose the heat kit that fits the application for the specific installation.
Permanently mark the unit’s nameplate with the model being installed. High
and low voltage connections are detailed in the heat kit instructions.
Indoor Blower motor speed tap selection may need to be modified to
accommodate normal continuous operation to prevent a nuisance trip.

See

following table.

MAINTENANCE

The Self Contained Package Air Conditioner and Heat Pump should operate for many years without excessive service calls if the
unit is installed properly. However it is recommended that the
homeowner inspect the unit before a seasonal start up. The
coils should be free of debris so adequate air flow is achieved.
The return and supply registers should be free of any
obstructions. The filters should be cleaned or replaced. These
few steps will help to keep the product up time to a maximum.
The Troubleshooting Chart

(see Appendix)

should help in

identifying problems if the unit does not operate properly.

Refer to Blower Performance section in the Appendix - Higher air flow lowers temperature rise.

Lower air flow raises temperature rise.

Models

Superheat °F

Subcooling °F

APH1624M41

15 ±2

8 ±2

APH1630M41