One circuit is more noisy than the other circuit
- Verify the oil and refrigerant charges are correct.
- Refer to the RTAC Subcooling curves and verify correct refrigerant charge.
- To check the oil level properly, run the suspect circuit at minimum load for at least 45 minutes.
- This could be done by disconnecting the female step load and male load solenoid wires from their respective module.
- After running at minimum load, shut the circuit down and wait 30 minutes prior to checking the oil level.
- Refer to the table below for correct oil levels. NOTE: Too much oil (30-40% overcharge) may cause carryover problems, therefore, be careful not to overcharge with too much oil.
Table 61. Oil charging data
| Circuit (Tons) | Approximate sump oil level after running "normal" conditions (in) | Normal quantity of oil in refrigeration system (evaporator / condenser) lb (gal) |
|---|---|---|
| 70 | 7 | 1.1 (0.14) |
| 85 | 6 | 1.1 (0.14) |
| 100 | 7 | 1.8 (0.23) |
| 120 | 7 | 1.8 (0.23) |
| 170 | 8 | 3.5 (0.44) |
| 200 | 8 | 3.5 (0.44) |
| 240 | 8 | 3.5 (0.44) |
Additional details
Facts
- Air-Cooled Chiller (Pueblo) (RTAC)
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.