AIR-COOLED MODELS: 5240, 5280 (7 kW NG, 6 kW LP) 5241, 5281 (9 kW NG, 10 kW LP) 5242, 5282 (13 kW NG, 13 kW LP) 5243, 5283 (15 kW NG, 16 kW LP) 5244, 5284 (15 kW NG, 16 kW…
