AERCO Innovation (G-14-2265 and above) - Manual (Page 26)

Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 2 – INSTALLATION
Page 26 of
206 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
OMM-0078_0L
PRI: 11/25/2014
Phone: 800-526-0288
GF-128
2.10 GAS SUPPLY PIPING
The AERCO Innovation Gas Components and Supply Design Guide, GF-5030 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 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.
Innovation units contain a 1 inch NPT gas inlet connection on the rear of the unit as shown in
Figure 2-3 (page 20).
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. The gas pressure applied to the unit should never 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.
2.10.1 Gas Supply Specifications.
The gas supply input specifications to the unit for Natural Gas are as follows:
• The maximum static pressure to the unit must not exceed 14” W.C.
• The gas supply pressure to the unit must be of sufficient capacity to provide either 600,
800, 1060 or 1350 cfh while maintaining the gas pressure of 7“ W.C. for FM gas trains
operating at maximum capacity.
2.10.2 Manual Gas Shutoff Valve
A manual shut-off valve is factory-installed in the gas supply line at the unit, as shown in Figure
2-3a. Additionally, if a gas regulator is installed upstream of the unit, refer to Figure 2-8 to
determine the location of the manual shut-off valve installation in relation to the regulator. The
maximum allowable gas pressure to the Heater is 14” W.C.
WARNING
CAUTION