Bryan Boilers 250 Boiler Connections, Flow Connection, Safety Relief Valves, Drain Connection

BE REMOVED after the boiler is set in-place on its concrete foundation before any piping/electrical connections are made. It is recommended that the plastic protective cover be left on as long as possible to reduce finish damage from the installation.

1.4BOILER CONNECTIONS

Do not run any pipes along the tube access panel side of the boiler. Maintain clearances as shown on the dimensional drawing for servicing of the boiler tubes. Provide at least 48" from the front of the boiler, unless a larger dimension is indicated on the dimensional. All piping should be designed and installed to avoid any loadings on the boiler connections or piping.

1.4.1FLOW CONNECTION

The system supply and return flow connections are shown on Figure 3 and Figure 4 respectively. A gate valve should be installed on the boiler outlet and inlet lines. This allows the boiler to be isolated from the heating system for draining and servicing.

1.4.2SAFETY RELIEF VALVES

Safety relief valve(s) are shipped loose. Connections are provided in the top of the boiler for the safety relief valve(s). The safety relief valve discharge piping must be the same size as the safety relief valve discharge opening and run to a point of safe discharge. Avoid over- tightening as this can distort valve seats. All piping from the safety relief valve(s) must be independently supported with no weight carried by the valve.

1.4.3EXPANSION TANK CONNECTIONS

Connection(s) to an expansion tank are to be provided by others in the system piping separate from the boiler.

1.4.4DRAIN CONNECTION

A drain valve must be installed on the boiler drain connection, the same pipe size as this connection, to allow draining of the boiler.

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Date: 8-4-2010

Revision: 0

Form: 2396

1.4.5CONDENSATE DRAIN CONNECTION

A 1” MPT connection is provided to drain the condensed products of combustion from a trap located beneath the boiler. This must be run to a drain using stainless steel or PVC piping. The condensate temperature should never exceed 212o F and the pH of the condensate should never be greater than 3.5. NO VALVE is to be installed in this line from the boiler to point of discharge.

1.4.6GAS SUPPLY CONNECTION

The installation must conform completely to the requirements of the authority having jurisdiction, or in the absence of such, requirements shall conform in the U.S. to the current National Fuel Gas Code, ANSI Z223.1-1984, or in Canada to the current Natural gas and propane installation code (CAN/CSA B149.1-05), and applicable regional regulations for the class; which should be followed carefully in all cases. Authorities having jurisdiction should be consulted before installations are made.

1.4.7DRIP LEG

A drip leg, or sediment trap, must be installed in the gas supply line. See Fig. 1.5A. The gas line must be connected to a supply main at least as large as the gas train connection at the boiler. This connection should be made with a union so that the boiler gas train components and burner may be easily removed for service.

1.4.8GAS PIPING LEAK TEST

Leaks shall be checked using a soap and water solution.

After completion of the gas-piping hookup, the installation must be checked for leaks. All joints up to the main motorized gas valve shall be checked. A pressure gauge shall be installed down stream of the main motorized gas valve and up stream of the manual gas shutoff valve in the closed position to ensure the main motorized

valves are not leaking by. During commissioning, the remainder of the gas train joints down stream of the main motorized gas