www.DaikinApplied.com 13 IM 972-2 • MAVERICK I ROOFTOP SYSTEMS
Table 2: Meter Time in Minutes and Seconds for Normal Input Rating of Furnaces Using Natural or LP Gas
Input Btu/
hr
Meter Size
Cu. Ft.
Heating Value Of Gas Btu Per Cu. Ft.
900 1000 1040 1100 2500
Min. Sec. Min. Sec. Min. Sec. Min. Sec. Min. Sec.
40,000
One 1 21 1 30 1 34 1 39 3 45
Ten 13 30 15 0 15 36 16 30 37 30
60,000
One 0 54 1 0 1 3 1 6 2 30
Ten 9 0 10 0 10 24 11 0 25 0
80,000
One 0 41 0 45 0 47 0 50 1 53
Ten 6 45 7 30 7 48 8 15 18 45
100,000
One 0 33 0 36 0 38 0 40 1 30
Ten 5 24 6 0 6 15 6 36 15 0
Table 3: LP Gas Pipe Capacity (Cubic feet per hour)
Nominal
Iron Pipe
Size, Inches
Length of Pipe, Feet
10 20 30 40 50 60 70 80 90 100
1/2 275 189 152 129 114 103 96 89 83 78
3/4 567 393 315 267 237 217 196 182 173 162
1 1,071 732 590 504 448 409 378 346 322 307
1-1/4 2,205 1,496 1,212 1039 913 834 771 724 677 630
1-1/2 3,307 2,299 1,858 1,559 1,417 1,275 1,181 1,086 1,023 976
2 6,221 4,331 3,465 2,992 2,646 2,394 2,205 2,047 1,921 1,811
Condensate Drain
The condensate drain connection of the evaporator is threaded
1" nominal iron pipe.
IMPORTANT: Install a condensate trap to ensure proper
condensate drainage (Figure 12).
Figure 12: Condensate Drain
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