Single Phase Charging Charts - Nordyne S5BMX-018E Installation Instructions Manual

Split system air conditioner - for export only 1.5, 2, 2.5, & 3 ton, single phase, r-22 models

Hide thumbs

Table Of Contents

Table of Contents

application noteS For USing r22 reFrigerant

• this equipment's cooling system contains refrigerant under high pressure. always use safe and

environmentally sound methods when handling refrigerant handling or servicing the unit. review the

factory literature and safety warnings prior to servicing.

• When repairing system leaks, always use a nitrogen (inert) gas to protect the refrigerant system and pressure

check the repair before re-charging. Always replace the filter-dryers when performing any repair to the refrigeration

system with one capable of acid removal. After completing the repairs, evacuate the system to 350 - 500 microns

and weigh in the refrigerant to the amount specified on the unit rating label.

• These refrigerant charging charts are valid for a wide variety of indoor return air conditions (temperature and airflow)

and are most influenced by the outdoor ambient temperature, outdoor fan operation, and unit operating voltage.

Before using these charging charts, make sure the unit is in a steady operating mode. As shown in Figures 6-14

(pages 14-18) the ideal sub-cooling can vary over the range of operation. Reference these charts to determine

the ideal amount of sub-cooling for a given liquid pressure. Units charged to other values will not perform at the

rated unit capacity and/or efficiency (EER).

• To inspect a systems operation using quality instruments, match the measured liquid temperature to the units

chart. The measured liquid pressure reading should be within 3% of the charts value for most installations.

• For systems that are operating with more than a 5% deviation, inspect the unit for the proper voltage and phase

balance and the refrigeration system for leaks.

• Units that are operating at less then 95% of the nominal voltage or with a 2% phase imbalance may see a more

significant deviation than the amount stated above.

• do not use the charts in systems that have a fan cycling under low-ambient control. Refer to the low-ambient

kit instructions for more information. (If applicable)

2758 (400)

2586 (375)

2413 (350)

2241 (325)

2068 (300)

1896 (275)

1724 (250)

1551 (225)

1379 (200)

1207 (175)

1034 (150)

862 (125)

689 (100)

application notes on the Use of charging charts