Reznor R6GP Unit Installation Manual - Manual (Page 40)

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Table 15. Orifice or Drill Size for Natural & Propane (LP) Gases
ALTITUDE ABOVE SEA LEVEL
0 to
2,000 FT
2,001 to
4,000 FT
4,001 to
6,000 FT
6,001 to
8,000 FT
8,001 to
10,000 FT
UNIT MODEL
NUMBER
GAS
TYPE
HEATING INPUT
(BTU/HR) NUMBER
OF
BURNERS
ORIFICE SIZE
HIGH FIRE LOW FIRE
R6GP-072*-100C
Natural 100,000 65,000
3
36 38 40 41 43
Propane 85,000 55,250 53 54 54 55 55
R6GP-072*-166C
Natural 166,000 107,900
5
36 38 40 41 43
Propane 141,000 91,650 53 54 54 55 55
R6GP-090*-200Ca
Natural 200,000 120,000
6
36 38 40 41 43
Propane 175,000 105,000 51 52 52 52 53
R6GP-120*-235Ca
Natural 235,000 141,000
7
36 38 40 41 43
Propane 205,000 123,000 51 52 52 52 53
* Refer to Instructions for High Altitude Deration (pages 11 & 12) to determine heat exchanger capacity at increased elevations.
GAS INFORMATION
Table 16. Heating Rise / Range
MODEL
GAS
TYPE
HEATING
INPUT
HEATING
OUTPUT
HEATING RISE
RANGE (°F)
CFM RANGE
SCFM 1950 2100 2250 2400 2550 2700
R6GP-072*-100C
Natural 100,000 80,000
15 - 45 RISE (°F)*
38 35 33 31 29 27
Propane 85,000 68,000 32 30 28 26 25 23
SCFM 1950 2100 2250 2400 2550 2700
R6GP-072*-166C
Natural 166,000 133,000
35 - 65 RISE (°F)*
63 59 55 51 48 46
Propane 141,000 112,800 54 50 46 44 41 39
SCFM 2425 2625 2800 3000 3188 3375
R6GP-090*-200Ca
Natural 200,000 160,000
30 - 60 RISE (°F)*
61 56 53 49 46 44
Propane 175,000 140,000 53 49 46 43 41 38
SCFM 3250 3500 3750 4000 4250 4500
R6GP-120*-235Ca
Natural 235,000 188,000
25 - 55 RISE (°F)*
54 50 46 44 41 39
Propane 205,000 164,000 47 43 40 38 36 34
* At elevations of 2,000 feet or less.
GAS PIPE CAPACITIES
Nominal Pipe
Diameter (IN.)
Length of Pipe Run (Feet)
10 20 30 40 50 60 70 80
1/2 130 90 75 65 55 50 45 40
3/4 280 190 150 130 115 105 95 90
1 520 350 285 245 215 195 180 170
1 1/4 1,050 730 590 500 440 400 370 350
1 1/2 1,600 1,100 890 760 670 610
NOTE: The cubic feet per hour listed in the table above must be greater than the cubic feet per hour of gas flow required by
the furnace. To determine the cubic feet per hour of gas flow required by the furnace, divide the input rate of the furnace by
the heating value (from gas supplier) of the gas.
Cubic Feet Per Hour Required =
Input To Furnace (Btu/hr)
Heating Value of Gas (Btu/Cu. Ft.)
Table 14. Capacity of Black Iron Gas Pipe (cu. ft. per hour)
for Natural Gas w/ Specific Gravity = 0.60