AERCO BMK 1000 - Manual (Page 22)

Benchmark 750/1000 Boiler Installation, Operation & Maintenance Manual
CHAPTER 2 – INSTALLATION
Page 22 of 192 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0082_0J
05/21/2014
Ph.: 800-526-0288
GF-130
2.8 GAS SUPPLY PIPING
The AERCO Benchmark Gas Components and Supply Design Guide, GF-2030 must be
consulted prior to designing or installing any gas supply piping.
NEVER USE MATCHES, CANDLES, FLAMES OR OTHER
SOURCES OF IGNITION TO CHECK FOR GAS LEAKS
.
Many soaps used for gas pipe leak testing are corrosive to metals.
Therefore, piping must be rinsed thoroughly with clean water after
soap 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 MBH units contain either a 1 inch NATURAL GAS or a 1 inch
PROPANE gas inlet connection 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.
2.8.1 Gas Supply Specifications
The gas supply input specifications to the unit are as follows:
• The maximum static pressure to the unit must not exceed the following:
Natural Gas Propane
Benchmark 750 14” W.C. 14” W.C.
Benchmark 1000 14” W.C. 16” W.C.
• Supply piping and pressure to the unit must be sufficient to provide the volume of gas
while maintaining gas pressure listed below while operating at maximum capacity:
Natural Gas Propane
Benchmark 750 728 CFH, maintaining 4” W.C. 300 CFH, maintaining 7” W.C.
Benchmark 1000 976 CFH, maintaining 4” W.C. 400 CFH, maintaining 11” W.C.
WARNING
CAUTION