GF-135
Esteem 399 Low NOx Boiler
Chapter 7
OMM-0089_0A
Installation, Operation & Maintenance Manual Gas Piping
Page
47
of
188
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0089_0A
MC1 06/19/14
Ph.: 800-526-0288
7.2.2 Natural Gas Supply Pressure Requirements
•
Pressure required at the gas valve inlet supply pressure port:
o
Maximum 13” W.C. at flow or no flow conditions to the burner.
o
Minimum 5” W.C. during flow conditions to the burner. Must be verified during start up
and with all other gas appliances operating within the building.
•
Install 100% lockup gas pressure regulator in the gas supply line if inlet pressure can
exceed 13” W.C. at any time. Adjust the lockup pressure regulator for 13”w.c maximum.
WARNING!
Do not adjust or attempt to measure gas valve outlet pressure. The
gas valve is factory-set for the correct outlet pressure. This setting
is suitable for natural gas and propane and requires no field
adjustment. Attempts by the installer to adjust or measure the gas
valve outlet pressure could result in damage to the valve, causing
potential severe personal injury, death or substantial property
damage.
NOTE
The natural gas orifice for the Esteem 399 Low NOx boiler is 0.339” (8.6
mm).
7.3 PROPANE GAS
7.3.1 Pipe Sizing – Propane Gas
Contact the local propane gas supplier for recommended sizing of piping, tanks and 100%
lockup gas regulator.
WARNING!
The unit is shipped with a propane conversion kit, which is located
on the top of the unit in the instruction packet. This kit includes all
the necessary parts and instructions to perform the conversion
from natural gas to propane gas. If this conversion kit is missing,
please contact AERCO Technical Support before installing the
Esteem boiler to use propane gas.
WARNING!
Prior to start up, ensure the unit is set to fire propane.
Check the rating label for the type of fuel.
Check the gas valve for propane conversion label.
If there is a conflict or doubt on the burner set up, remove the gas
valve and check for the propane orifice (Figure 7-2). Failure to
ensure proper burner setup could result in severe personal injury,
death or substantial property damage.
