User Guide

37
CAUTION
• Support the weight of the gas line piping independently from the boiler gas connection
tting located on the bottom of the boiler.
• If an additional regulator is used to reduce boiler inlet pressure below 1/2 psig (3.4 kPa) it
must be at least 6 to 10 feet upstream of the boiler.
• It is very important that the gas line is properly purged by the gas supplier or utility
company.
FIGURE 8.1: GAS CONNECTION TO BOILER
TABLE 8.2: MINIMUM AND MAXIMUM INLET PRESSURES
MODEL MAX (NATURAL & LP) MIN (NATURAL) MIN (LP)
80MBH 14.0” 2.5” 11.0”
100MBH 14.0” 2.5” 11.0”
120MBH 14.0” 2.5” 11.0”
150MBH 14.0” 2.5” 11.0”
180MBH 14.0” 2.5” 11.0”
NOTICE
Install 1/2” ground joint union (nut side down) as shown in Figure 8.1. Failure to do so will make it
difcult or impossible to remove burner for servicing.