3-PAGE VECTOR A4 STUDIO
For a 125-lb DOT-4BW400 Commercial Recovery Cylinder (Water Capacity 123 lbs, Typical Tare 62 lbs) recovering R-410A (Liquid SG 0.91 at 130 degF, ASHRAE Class A1), the maximum safe 80% DOT liquid fill weight is 89 lbs 9 oz (89.54 lbs) net refrigerant, yielding a maximum gross scale weight of 151 lbs 9 oz (151.54 lbs).
Pre-computed for a nominal factory full charge of 16 lbs 8 oz under the 10% Comfort Cooling (10% Max EPA Leak Rate) limit:
| Days Since Last Charge | Annualizing Multiplier | Max Addition Before 10% Trigger (Annualizing) | Max 12-Mo Addition (Rolling Avg) | 125% Chronic Leaker EPA Report Limit |
|---|---|---|---|---|
| 30 Days | 12.17x | 0 lbs 2 oz (0.14 lbs) | 1 lbs 10 oz (1.65 lbs) | 20 lbs 10 oz (20.63 lbs) |
| 60 Days | 6.08x | 0 lbs 4 oz (0.27 lbs) | 1 lbs 10 oz (1.65 lbs) | 20 lbs 10 oz (20.63 lbs) |
| 90 Days | 4.06x | 0 lbs 7 oz (0.41 lbs) | 1 lbs 10 oz (1.65 lbs) | 20 lbs 10 oz (20.63 lbs) |
| 180 Days | 2.03x | 0 lbs 13 oz (0.81 lbs) | 1 lbs 10 oz (1.65 lbs) | 20 lbs 10 oz (20.63 lbs) |
| 270 Days | 1.35x | 1 lbs 4 oz (1.22 lbs) | 1 lbs 10 oz (1.65 lbs) | 20 lbs 10 oz (20.63 lbs) |
| 365 Days | 1.00x | 1 lbs 10 oz (1.65 lbs) | 1 lbs 10 oz (1.65 lbs) | 20 lbs 10 oz (20.63 lbs) |
| DOT Cylinder Specification | Water Capacity (WC) | Typical Tare Wt | R-410A SG @ 130 degF | Max 80% Net R-410A Charge | Max Safe Gross Scale Reading |
|---|---|---|---|---|---|
| 30-lb DOT-4BA400 Refrigerant Recovery Cylinder | 26.2 lbs | 17.8 lbs | 0.91 | 19 lbs 1 oz (19.07 lbs) | 36 lbs 14 oz (36.87 lbs) |
| 50-lb DOT-4BA400 Refrigerant Recovery Cylinder | 47.6 lbs | 28.5 lbs | 0.91 | 34 lbs 10 oz (34.65 lbs) | 63 lbs 2 oz (63.15 lbs) |
| 125-lb DOT-4BW400 Commercial Recovery Cylinder | 123.0 lbs | 62.0 lbs | 0.91 | 89 lbs 9 oz (89.54 lbs) | 151 lbs 9 oz (151.54 lbs) |
Under the US EPA AIM Act Subsection (h) rule (40 CFR Part 84, Subpart C) effective January 1, 2026, any 5-Ton Commercial Rooftop Unit (RTU) operating with R-410A (Puron / Genetron AZ-20, AR4 GWP 2088) holding 15.0 pounds or more of refrigerant is subject to mandatory federal leak rate calculations and 3-year recordkeeping. With a nominal factory charge of 16 lbs 8 oz (16.50 lbs), this 5-Ton Commercial RTU exceeds the 15-pound threshold by 1.5 lbs and falls under the 10% maximum annual leak rate limit for Comfort Cooling (10% Max EPA Leak Rate).
SAFETY & OIL COMPATIBILITY: R-410A carries an ASHRAE Class A1 non-flammable classification and utilizes Standard 1/4-inch Right-Hand Flare (RH) service connections. This system circulates POE (Polyolester Synthetic Oil), which is highly hygroscopic in POE applications—requiring evacuation verification below 500 microns using an electronic thermistor or capacitance micron gauge prior to recharging.
CHARGING & PINPOINT VERIFICATION: With a negligible glide of 0.3 degF and a normal boiling point of -60.8 degF, R-410A maintains stable saturation pressures (118.9 PSIG at 40 degF evaporator coil; 340.5 PSIG at 105 degF condensing temperature). During EPA initial and follow-up verification tests, inspect Schrader service valve cores, brazed TXV distributor joints, high-pressure switch flare nuts, and microchannel condenser header bends..
For a 5-Ton Commercial Rooftop Unit (RTU) holding 16 lbs 8 oz (16.50 lbs) of R-410A under the 10% Comfort Cooling (10% Max EPA Leak Rate) limit, adding more than 1 lbs 10 oz (1.65 lbs) over a rolling 365-day period triggers the mandatory 30-day EPA repair clock. Under the Annualizing Method, if only 90 days have elapsed since the last charge, adding just 0 lbs 7 oz (0.41 lbs) will exceed the 10% annualized threshold.
Yes. Because R-410A has a GWP of 2088 (greater than 53) and this 5-Ton Commercial RTU holds 16 lbs 8 oz (16.50 lbs) (at or above the 15-pound threshold effective January 1, 2026 under 40 CFR Part 84), the building owner and servicing contractor must calculate leak rates on every addition, perform initial and 10-day follow-up verification tests, and keep records for 3 years.
Under 40 CFR 84.106(j), if cumulative refrigerant additions to this 16 lbs 8 oz (16.50 lbs) 5-Ton Commercial RTU reach or exceed 125% of its full charge (20 lbs 10 oz (20.63 lbs)) within a single calendar year, the owner/operator must submit a Chronic Leaker Report to the EPA by March 1 of the following year describing the root cause and corrective plan.