Gas Piping Multiple Boilers - Crown Boiler PHNTM080 Installation Instructions Manual

It is recommended that the gas piping of each individual boiler be installed as shown in Figure 3.1. When common gas
piping is sized, insure it will have adequate capacity for the combined input of the multiple boilers being installed.
Additional gas pressure regulators may need to be installed to properly regulate inlet gas pressure at the smallest individual
boiler. Follow the instructions in Section VIII of the Phantom 080-180 Installation and Operating Instructions Manual for
more detail on gas piping installation and hazards.
If gas pressure in the building is above 1/2 psig (3.4 kPa), an additional gas pressure regulator is required.
Using one additional regulator for multiple boilers may result in unsafe boiler operation. The additional
regulator must be able to properly regulate gas pressure at the input of the smallest boiler. If the regulator
cannot do this, two or more additional regulators are required. Consult regulator manufacturer and/or local
gas supplier for instructions and equipment ratings.
III Gas Piping Multiple Boilers
CAUTION
FIGURE 3.1: GAS CONNECTION TO BOILER
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