Aerco AM 399 Series Руководство по применению - Страница 4
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The unit must be isolated from the system when leak testing the
gas piping.
Drip legs are typically required at the gas supply of each unit to prevent any dirt, weld slag, or debris
from entering the boiler gas train inlet pipe. When multiple units are installed, some utilities and local
codes require a full size drip leg on the main gas supply line in addition to the drip leg at each unit. The
bottom of the gas drip leg(s) should be removable without disassembling any gas piping. The weight of
the gas pipe should not be supported from the bottom of the drip leg. The drip leg(s) should not be used
to support any or part of the gas piping.
4. GAS PIPING
All gas piping and components must comply with NFPA local codes, and utility requirement
minimums. Only gas approved fittings, valves, and pipe should be utilized.
Standard industry practice for gas piping is Schedule 40 iron pipe and fittings. All high and low gas
pressure piping systems must comply with local utility and building codes.
Assembled piping should be clean of all debris, pipe chips, or foreign material to prevent any from
entering the unit's boiler gas train. Piping should be tested as prescribed in NFPA 54. Equipment
should be isolated before testing any piping system over the allowable pressure. DO NOT EXCEED
13" W. C. on the inlet side of the unit at any time.
PR1 04/08/2014
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288
AM Series Gas Supply
Application Guide
CAUTION!
GAS PRESSURE
REGULATOR
Figure 1: Single Boiler Gas Pipe Connections
GAS SUPPLY LINE:
MAINTAIN AT LEAST 3" W.C.
NATURAL GAS PRESSURE AT
MAXIMUM BTU/HR INPUT
DRIP LEG
MANUAL GAS
SHUT-OFF VALVE
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