AERCO BMK 1.5 LN Dual Fuel Feb 2013 - Manual (Page 16)

CHAPTER 2: INSTALLATION
Page 16 of 162 PR2: 05/09/12
Benchmark 1.5LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0041_0C
GF-121
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
Figure 2-5: Condensate Trap Installation: Older (left) and Newer (right) Style
2.7 GAS SUPPLY PIPING
The AERCO Benchmark 1.5 Gas Components and Supply Design Guide, GF-4030 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 soaps used for gas pipe leak testing are corrosive to metals.
There-fore, 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 1.5 Dual-Fuel units contain two 1-1/2 inch gas inlet connections on the rear of the
unit as shown in Figure 2-3. If one of the fuel sources is not being piped due to its unavailability,
the inlet must be capped.
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, isolate the unit from the gas supply
piping. At no time should the gas pressure applied to the unit exceed 14” W.C. Leak test all
external piping thoroughly using a soap and water solution or suitable equivalent. The gas
piping used must meet all applicable codes.