GF-135
Esteem 399 Low NOx Boiler
Chapter 7
OMM-0089_0A
Installation, Operation & Maintenance Manual Gas Piping
Page
45
of
188
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0089_0A
MC1 06/19/14
Ph.: 800-526-0288
CHAPTER 7:
GAS PIPING
7.1 GAS SUPPLY PIPING CONNECTION
Install the gas piping as described below.
Connecting the Gas Supply Piping
NOTE
The gas supply piping must be installed in accordance to all local,
state and national codes and utility requirements.
Figure 7-1: Recommended Gas Supply Piping
1. Install a 1” NPT for the pipe union at the factory supplied gas nipple, for ease of service.
2. Install a manual shutoff valve in the gas supply piping as shown in Figure 7-1. For Canadian
installations the main shutoff valve must be tagged and identified by the installer.
3. Install a sediment trap (drip leg) on the gas supply line prior to connecting to the Esteem
boiler gas train as shown in Figure 7-1.
4. Support the gas piping using hangers. Do not support the piping by the unit or its
components.
5. Purge all air from the gas supply piping.
6. Before placing the boiler into operation, test all connections for leaks.
7. Close the manual shutoff valve during any pressure test with less than 13” W.C..
8. Disconnect the Esteem boiler and its gas valve from the gas supply piping during any
pressure test greater than 13” W.C..
