Installation - Natural Gas; Gas Supply Piping; Natural Gas Pressure Requirements - Watts Aerco AM Series Operation & Maintenance Manual

AM Series Pool Heater User Manual
SECTION 6: INSTALLATION - NATURAL GAS
SECTION 6: INSTALLATION – NATURAL GAS

6.1 Gas Supply Piping

Check that the type and the pressure of the gas supplied correspond with those required for the
heater as stated on the rating plate. Never use a gas different than that stated on the heater rating
plate. A lockup style regulator is required on each unit any time the gas supply pressure may
exceed 13" W.C. If gas supply pressure is between 3" and 13" individual regulators are
recommended on every unit but not required.
NOTE:
For installation in Massachusetts an individual gas regulator is required on every unit
regardless of incoming gas pressure.

6.2 Natural Gas Pressure Requirements

Each natural gas boiler requires a minimum gas pressure of 3" W.C. at gas flow rates indicated
in the table below (full load rated capacity). For applications with gas supply pressure greater than
13" W.C., each boiler must be provided with an individual supply gas regulator by the installing
contractor for proper gas regulation.
GAS INLET
AIR INLET
FLUE OUTLET
Figure 6-1: AM Series Gas Connection Example
OMM-0111_B: • GF-146-P • 10/29/2019
Gas Flow Requirements
Model Gas Flow (scfh)
AM 399B 399
AM 500B 500
AM 750B 750
AM 1000B 1000
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
1" MANUAL
SHUTOFF VALVE
GAS PRESSURE
REGULATOR
DIRT TRAP
GAS INLET
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