Roberts Gorden 125 - Manual (Page 53)

SECTION 16: S PECIFICATIONS
45 of 47
16.2 General Technical Data Table
*Do not exceed the maximum length of flue stated or heater may not operate properly.
16.3 Technical Data Table
Model UHD[X][S] 75 UHD[X][S] 100 UHD[X][S] 125
Full Load Amps @ 120 V A 1 2 2
Minimum Air Volume CFM 850 950 1020
Temperature Rise @ Minimum Air Volume °F (°C) 68 (37) 78 (43) 92 (51)
Heat Exchanger Pressure Drop @ Minimum Air Volume in wc 0.06 0.05 0.06
Maximum Air Volume CFM 2650 3660 4750
Temperature Rise @ Maximum Air Volume °F (°C) 22 (12) 22 (12) 20 (11)
Heat Exchanger Pressure Drop @ Maximum Air Volume in wc 0.36 0.55 0.98
Flue Size/Air Intake** in (cm) 4 (10)-All models
Duct Size (Width) in (cm) 16 3/4 (43) 21 3/4 (55) 21 3/4 (55)
Duct Size (Height) in (cm) 15 7/8 (40) 15 7/8 (40) 15 7/8 (40)
Weight lb (kg) 81 (36.7) 92 (41.7) 97 (44)
Recomended Mounting Height to Heater Base ft (m) 12 (3.66) 20 (6.10) 20 (6.10)
Model UHD[X][S] 75 UHD[X][S] 100 UHD[X][S] 125
Total Input (Btu/h) x (1000) 75 100 125
Total Output (Btu/h) x (1000) 61.5 82 102.5
Efficiency % 82-All models
Natural Gas (G20) Data - Inlet Pressure 5.0 in wc Min., 14 in wc Max.
Burner Pressure in. wc 3.5 2.6 3.3
LPG / Propane (G31) Data - Inlet Pressure 12.0 in wc Min., 14 in wc Max.
Burner Pressure in. wc 10.0 9.1 10.0