Mechanical Installation
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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: Condensate Drain
Summary of Contents for Maverick I
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