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Benchmark 750-3000 Boiler Installation & Startup Manual
SECTION 2 – INSTALLATION
2.9 GAS SUPPLY PIPING
AERCO's Benchmark Gas Components and Supply Design Guide, TAG-0047 (GF-2030)
must be consulted prior to designing or installing any gas supply piping.
WARNING!
NEVER USE MATCHES, CANDLES, FLAMES OR OTHER SOURCES OF IGNITION TO
CHECK FOR GAS LEAKS
CAUTION!
Many of the soaps used for gas pipe leak testing are corrosive to metals. Therefore, piping
must be rinsed thoroughly with clean water after leak checks have been completed.
NOTE:
All gas piping must be arranged so that it does not interfere with removal of any covers,
inhibit service/maintenance, or restrict access between the unit and walls, or another unit.
Benchmark 750 and 1000: Features a 1 inch (2.54 cm) NATURAL GAS gas inlet connection
on the rear of the unit.
Benchmark 750P and 1000P: Features a 1 inch (2.54 cm) PROPANE gas inlet connection on
the rear of the unit.
Benchmark 1500/2000/2500/3000: Features a 2 inch (5.08 cm) NATURAL GAS gas inlet
connection on the top of the unit.
Benchmark 1500P, 2000P, 2500P, and 3000P (Propane): Features a 1 inch (2.54 cm)
PROPANE gas inlet connection on the top of the unit.
Benchmark 1500DF, 2000DF, 2500DF, and 3000DF (Dual Fuel): Features a 2 inch (5.08 cm)
NATURAL GAS and a 1 inch (2.54 cm) PROPANE gas inlet connection on the top of the unit.
Prior to installation, all pipes should be de-burred and internally cleared of any scale, metal
chips or other foreign particles. Do NOT install any flexible connectors or unapproved gas
fittings. Piping must be supported from the floor, ceiling or walls only and must not be supported
by the unit.
A suitable piping compound, approved for use with natural gas, should be used. Any excess
must be wiped off to prevent clogging of components.
To avoid unit damage when pressure testing gas piping, the unit must be isolated from the gas
supply piping. The gas pressure applied to the unit must never exceed 14" W.C. (3.49 kPa). A
thorough leak test of all external piping must be performed using a soap and water solution or
suitable equivalent. The gas piping used must meet all applicable codes.
OMM-0121_D • GF-205 • 5/9/2019
.
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
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