TABLE 7
LP/PROPANE GAS MANIFOLD PRESSURES - in.wg. (kPa )
ALTITUDE FT. (M)
MODEL | ||||||||||
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TUA045SL | 9.5 (2.37)* | 7.4 (1.84) | 6.7 (1.67) | 6.1 (1.52) | 5.5 (1.37) | 4.9 (1.22) | 4.4 (1.10) | 3.9 (0.97) | 3.4 (0.85) | |
TUA060SL | 9.5 (2.37)* | 7.4 (1.84) | 6.7 (1.67) | 6.1 (1.52) | 5.5 (1.37) | 4.9 (1.22) | 4.4 (1.10) | 3.9 (0.97) | 3.4 (0.85) | |
TUA075SL | 9.5 (2.37)* | 7.4 (1.84) | 6.7 (1.67) | 6.1 (1.52) | 5.5 (1.37) | 4.9 (1.22) | 4.4 (1.10) | 3.9 (0.97) | 3.4 (0.85) | |
TUA100SL | 9.0 (2.24)* | 7.0 (1.74) | 6.4 (1.59) | 5.8 (1.44) | 5.2 (1.30) | 4.7 (1.17) | 4.2 (1.05) | 3.7 (0.92) | 3.2 (0.80) | |
TUA125SL | 9.0 (2.24)* | 7.0 (1.74) | 6.4 (1.59) | 5.8 (1.44) | 5.2 (1.30) | 4.7 (1.17) | 4.2 (1.05) | 3.7 (0.92) | 3.2 (0.80) |
*No adjustment required.
Gas Flow
Check for proper gas flow to the unit heater.
1.Operate unit at least 15 minutes before checking gas flow. Determine the time in seconds for one revolution of gas through the meter.
2.Compare the number of seconds and the gas meter size in table 8 to determine the gas flow rate. Multiply the gas flow rate by the heating value to determine the unit input rate. If manifold pressure is correct and the unit input rate is incorrect, check gas orifices for proper size and restriction.
3.Remove temporary gas meter if installed.
NOTE – To obtain accurate reading, shut off all other gas appliances connected to meter.
TABLE 8
Gas Flow Rate (Ft.3/Hr.)
Seconds for 1 |
|
| Gas Meter Size | |
Revolution | ½ cu ft Dial | 1 cu ft Dial | ||
10 |
| 180 | 360 | |
12 |
| 150 | 300 | |
14 |
| 129 | 257 | |
16 |
| 113 | 225 | |
18 |
| 100 | 200 | |
20 |
| 90 | 180 | |
22 |
| 82 | 164 | |
24 |
| 75 | 150 | |
26 |
| 69 | 138 | |
28 |
| 64 | 129 | |
30 |
| 60 | 120 | |
32 |
| 56 | 113 | |
34 |
| 53 | 106 | |
36 |
| 50 | 100 | |
38 |
| 47 | 95 | |
40 |
| 45 | 90 | |
42 |
| 43 | 86 | |
44 |
| 41 | 82 | |
46 |
| 39 | 78 | |
48 |
| 38 | 75 | |
50 |
| 36 | 72 | |
52 |
| 35 | 69 | |
54 |
| 33 | 67 | |
56 |
| 32 | 64 | |
58 |
| 31 | 62 | |
60 |
| 30 | 60 | |
Natural = 1000 btu/cu ft |
| LP = 2500 btu/cu ft | ||
Note: Table assumes standard temperature (60°F), barometric pressure (30 in Hg), and fuel heating values (btu/cu ft). Fuel heating values may vary, contact local fuel supplier to obtain actual heating value of fuel being supplied.
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