PB Heat Gas Boiler Water Piping And Controls, 1 Piping Symbol Key, 2 - Boiler Inputs and Outputs

WATER PIPING AND CONTROLS

Figure 3.1: Piping Symbol Key

9.Pressure Relief Valve: The boiler pressure relief valve is factory installed into the right side boiler manifold (inside the jacket). Pipe the discharge of the relief valve to within 12" of the floor and close to a floor drain. Provide piping that is the same size or larger than the relief valve outlet.

CAUTION

Pipe the discharge of the relief valve as close as possible to the floor and away from high traffic areas. Pipe the discharge to a floor drain. Failure to do so may result in personal injury and/or property damage.

10.Circulator: The boiler circulator is to be sized to overcome the pressure drop of the system while providing the flow required by the boiler.

a.If the boiler is piped in a secondary loop of a primary/secondary heating system, the circulator will need only to overcome the resistance of the boiler and any fittings in that loop.

b.The circulator should be sized based on the net output of the boiler. The Table 3.2 shows the Boiler Output as reported to the Hydronics Institute division of GAMA. These values are based on a pickup factor of 1.15.

Table 3.2 – Boiler Inputs and Outputs

Boiler	Boiler Input	Net I=B=R Output
Model	(Btu/hr [kW])	(Btu/hr [kW])
PI-T50	50,000 (14.7)	40,000 (11.7)
PI-T80	80,000 (23.4)	64,000 (18.8)
PI-80	80,000 (23.4)	64,000 (18.8)
PI-140	140,000 (41.0)	112,000 (32.8)
PI-199	199,000 (58.3)	159,000 (46.6)

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