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GAS INPUT RATE VERICATION REQUIREMENTS
Natural Gas Applications Gas Input Rate Verification Procedures
Verify Main Orifice Size. The main orifice body has the orifice hole size stamped on it. NG orifice size shall be 1/8"
for 0-2000 feet elevation and #31 for elevations exceeding 2000 feet.
Verify that the Manifold Gas Pressure is within 3.5" WC +/- 1/8".
Once setup, read the main home gas supply meter reading.
Write the initial reading here >> Initial Gas Meter Reading _______________
Turn OFF all other appliances and their pilot flame in the home.
Run this appliance for a period of 30 minutes on maximum flame size. Turn off main burner and pilot flame.
Read the main home gas supply meter reading after the 30 minutes of burn time.
Write the reading here >> Final Gas Meter Reading _______________
Calculate the following:
FINAL GAS METER READING - INITIAL GAS METER READING...Subtract Initial Gas Meter from Final Gas
Meter Reading. This will yield the number of Therms used during the 30 minute burn time.
Multiply the result in Item 11 by 100,000.
Multiply the result in Item 12 by 2. Write down the Result here >>_________________
The result in item #13 shall be at least maximum Input Rate (41,000 Btu) for altitudes below 2000 Feet. For alti-
tudes higher than 2000 feet, the result in item #13 shall be at least 40,000 Btu.
LPG Applications Gas Input Rate Verification Procedures
Verify Main Orifice Size. The main orifice body has the orifice hole size stamped on it. LPG orifice size shall be
#48 for 0-2000 feet elevation and #49 for elevations exceeding 2000 feet.
Verify that the Manifold Gas Pressure is within 3.5" WC +/- 1/8".
