Burnham SERIES 2 manual Boilerpiping, Oxygen Corrosion, Length Inch w.c. Pressure Drop Feet

9.BOILERPIPING

CAUTION

Failure to properly pipe boiler may result in improper operation and damage to boiler or building.

A. CLEARANCES - Hot water pipes do not require clearance from combustible construction.

B. Install drain cock and safety relief valve as shown in Figure 4. Note - Safety relief valve must be in vertical position.

C. Pipe safety relief valve discharge to floor.

WARNING

Safety relief valve discharge piping must be piped near floor to eliminate potential of severe burns. Do not pipe in any area where freezing could occur. Do not install any shut-off valves.

D. Install circulator with flanges, gaskets and bolts provided. Five foot long circulator harness allows circulator to be mounted on supply or return. Connect harness to circulator and secure any excess conduit.

E. For heating only system piping, see Figure 3. Consult also I=B=R Installation Guides.

F.Space heating and domestic water heating with Alliance water heater (intermittent circulation only). Install Alliance water heater as a separate heating zone. Refer to Alliance Installation, Operating and Service Instruc- tions for additional information.

G.If this boiler is used in connection with refrigeration systems, the boiler must be installed so that the chilled medium is piped in parallel with the heating boiler using appropriate valves to prevent the chilled medium from

entering the boiler, see Figure 4. Also consult I=B=R Installation and Piping Guides.

If this Boiler is connected to heating coils located in air handling units where they may be exposed to refrigerated air, the boiler piping must be equipped with flow control valves to prevent gravity circulation of boiler water during the operation of the cooling system.

H. Use a boiler bypass if the boiler is to be operated in a system which has a large volume or excessive radia- tion where low boiler water temperatures may be encountered (i.e. converted gravity circulation system, etc.).

Remove the circulator and install a pipe tee between the circulator and boiler return along with a second tee in the supply piping as shown in Figure 5. The bypass should be the same size as the supply and return lines with valves located in the bypass and supply outlet as illustrated in Figure 5 in order to regulate water flow to maintain higher boiler water temperatures.

Set the by-pass and boiler supply valves to a half throttle position to start. Operate boiler until the system water temperature is at a normal operating range.

Adjust the valves to provide 180° to 200°F supply water temperature. Opening the boiler supply valve will raise the system temperature, while opening the by-pass valve will lower the system supply tempera- ture.

I.A hot water boiler installed above radiation level must be provided with a low water cutoff device as part of the installation.

J.OXYGEN CORROSION:

Oxygen contamination of the boiler water will cause corrosion of the iron and steel boiler components, which can lead to failure. As such, any system must be designed to prevent oxygen absorption in the first place or prevent it from reaching the boiler. Problems caused by oxygen contamination of boiler water are not

Length		0.3 inch w.c. Pressure Drop					0.5 inch w.c. Pressure Drop
[Feet]	½		¾	1	1¼	½		¾	1	1¼
10	132	278		520	1,050	175	360		680	1,400
20	92	190		350	730	120	250		465	950
30	73	152		285	590	97	200		375	770
40	63	130		245	500	82	170		320	660
50	56	115		215	440	73	151		285	580
60	50	105		195	400	66	138		260	530
70	46	96		180	370	61	125		240	490
80	43	90		170	350	57	118		220	460
90	40	84		160	320	53	110		205	430
100	38	79		150	305	50	103		195	400

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