Milnor 7272TG1L, Installation And Service

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Gas and Air Adjustments
PELLERIN MILNOR CORPORATION
Table 2: Model-Specific Settings—6458 Models
Natural Gas (see Note
1 )
6458 Standard 6458 CSA 6458 Landis &
Gyr 6458 with Older
Noise Suppression
(see
Note 3 )
Inches
H2O mm
H2O Inches
H2O mm
H2O Inches
H2O mm
H2O Inches
H2O mm
H2O
Static Gas Pressure 13.5 337 18 457 13.5 337 13.5 337
Low Combustion Air
Pressure Switch 0.6 15 0.4 10 0.4 10 0.2 5
Low Main Air 1.2 30 2.4 61 1.2 30 1.2 30
Pilot Gas Regulator
Pressure 1.6 40 1.6 40 1.3-1.4 (33-35) 1.6 40
Pilot Gas Flame 1 25 1 25 1 25 1 25
Regulated Main Gas
Pressure 6.5 (See
Note 1) 165 6.5 (See
Note 1) 165 6.5 (See
Note 1) 165 6.5 (See
Note 1) 165
Burner Minimum Fire
(above ambient
temperature) 70-80 F 21-27 C 70-80 F 21-27 C 70-80 F 21-27 C 70-80 F 21-27 C
High Gas Pressure 8.13 206 8.13 206 8.13 206 8.13 206
Low Gas Pressure 3.25 83 3.25 83 3.25 83 3.25 83
Back Pressure Switch 0.8 20 0.8 20 0.8 20 0.8 20
Burner Pressure
Switch 0.06 1.5 0.06 1.5 0.06 1.5 0.06 1.5
Note 1: This table also applies to propane dryers, except as explained in Section 4 .
Note 2: Set Regulated Main Gas Pressure at 4.5 for NOx controlled dryers
Note 3: This data only applies to the older noise suppresion design that used a flexible combustion air duct
on the rear of the machine.
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