AERCO BMK 2.0 LN Natural Gas (SN G-11-1861 and above) - Manual (Page 20)

Chapter 2
Benchmark 2.0LN Low NOx Boiler
GF-123
Installation Installation, Operation and Maintenance Manual OMM-0046_0E
Page 20 of 170 AERCO International Inc.● 100 Oritani Dr. ● Blauvelt, NY 10913. ● Ph: 800-526-0288 PR1 08/20/12
4. If a floor drain is not available, a condensate pump can be used to remove the condensate
to drain. The maximum condensate flow rate is 20 GPH. The condensate drain trap,
associated fittings and drain line must be removable for routine maintenance.
Figure 2-5: Condensate Trap Installation: Older (left) and Newer (right) Style
2.7 GAS SUPPLY PIPING
The AERCO Benchmark 2.0LN Gas Components and Supply Design Guide, 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.
WARNING
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.
A 2 inch gas inlet connection is located on the rear of the unit as shown in Figure 2-3.
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.