System Cooling
1.Set the thermostat’s system mode to COOL and the fan mode to AUTO. Gradually lower the thermostat temperature setpoint below room temperature and verify the outdoor unit and indoor blower energize.
2.Verify blower wheel is spinning in direction indicated by arrow.Feel the air being circulated by the indoor blower and verify that it is cooler than ambient temperature. Listen for any unusual noises. If unusual sounds occur, determine the source of the noise and correct as necessary.
3.Verify HI and LO refrigerant pressures.
4.Allow the system to operate for several minutes and then set the temperature selector above room temperature. Verify the fan and compressor cycle off with the thermostat. NOTE: The blower should also stop unless fan mode is set to the ON position.
System Heating (optional)
1.Set the thermostat's system mode to HEAT and the temperature mode above room temperature.
2.Verify the optional heating equipment (furnace or electric heat) and indoor blower energize. Feel the air being circulated by the indoor blower and verify that it is warmer than ambient temperature. Listen for any unusual noises. If unusual sounds occur, determine the source of the noise and correct as necessary.
Refrigerant Charging
WARNING:
This split system air conditioner left the factory with a nitrogen holding charge. DO NOT operate any unit while it contains a Nitrogen holding charge. Doing so may damage the units compressor. Follow these charging instructions for maximum unit performance and efficiency. Some local codes require licensed installation/service personnel to service this type of equipment. Refrigerant charging must be done by qualified personnel familiar with safe and environmentally responsible refrigerant handling procedures. Under no circumstances should the owner attempt to install and/or service this equipment. Failure to comply with this warning could result in property damage, personal injury, or death.
This unit may contain a compressor with POE oil. If the compressor model contains an E before the first hyphen, then it is a POE oil compressor. If it does not then it is a mineral oil compressor. (Example:
To properly charge these units:
1.Read all Installation Instructions first.
2.Complete any brazing operations. (e.g. Split system
3.Leak check and evacuate the whole system using proper methods.
4.Purge the nitrogen holding charge.
5.Evacuate the unit to
6.Allow the unit to remain under vacuum for at least 30 min.
7.
•Refrigerant charging charts are applicable only to matched assemblies of this equipment and listed airflows for the indoor coil. Refer to Figures 4 - 10 (Pages 9 - 12) for correct system charging.
•Outdoor units with indoor coils not listed are not recommended. Deviations from rated airflows or non- listed combinations may require modification to the expansion device and refrigerant charging procedures for proper and efficient system operation.
•The refrigerant charge can be checked and adjusted through the service ports provided external to the outdoor unit. Use only gage line sets which have a “Schrader” depression device present to actuate the valve.
Charging an
1.With the system operating at
2.Measure the liquid refrigerant temperature (in Fahrenheit) at the service valve.
3.Determine the required liquid refrigerant pressure. Refer to Tables 4 - 10 (pages 13 - 16) for correct system charging.
•If the pressure measured in Step 1 is greater than the required liquid refrigerant pressure determined in Step 3, then there is too much charge in the system. Remove refrigerant and repeat Steps 1 through 3 until the system is correctly charged.
•If the pressure measured in Step 1 is less than the required liquid refrigerant pressure determined in Step 3, there is too little charge in the system. Add refrigerant and repeat Steps 1 through 3 until the system is correctly charged.
Model | Restrictor Bore | System charge |
Number | Size (inches) | |
|
|
|
018KA | 0.053 | 78 |
024KB | 0.060 | 53 |
030KB | 0.065 | 56 |
036KB | 0.075 | 68 |
042KA | 0.078 | 122 |
048KA | 0.089 | 126 |
060KA | 0.099 | 160 |
Table 3. Refrigerant Metering Device
for 13 SEER Split System Air Conditioner
7
