AERCO Esteem Boiler with EZ-Set Controller - Manual (Page 96)

GF-135 Esteem 399 Low NOx Boiler
Chapter 12
OMM-0089_0A
Installation, Operation & Maintenance Manual Start-Up Procedures
Figure 12-2: Gas Valve / Venturi Assembly
12.4.5 Measure and Verify Input Rating - Natural Gas Only
To measure and verify the input for Natural Gas (Only), perform the following procedure.
Measuring and Verifying Natural Gas Input Rating
1. Ensure the boiler is firing at maximum firing rate. To manually place the boiler into high fire
mode, refer to instructions in Section 12.3.4 of this chapter.
2. Operate the unit for approximately 10 minutes.
3. Turn off all gas appliances within the building, except the Esteem boiler.
4. At the gas meter, record the time required to use one cubic foot of gas.
5. Calculate Natural gas input using the following equation:
3600 x 1000 / number of second recorded for one cubic foot of gas = BTU/H.
6. The BTU/H calculated should approximate the input rating listed on the unit.
Offset Pressure Screw
Gas Valve
Orifice
(Natural or
Propane gas)
Gasket
Venturi
Throttle Screw
(Red Plastic Sleeve)
Inlet Gas Pressure Port
Page 96 of 188 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0089_0A
MC1 06/19/14 Ph.: 800-526-0288