COMMERCIAL HIGH CAPACITY GAS BOILERS, NATURAL GAS -- WATER ONLY

ON HEAT EXCHANGER ON ENTIRE BOILER

The Burnham Series 8H cast iron gas-fired boiler provides outstanding single boiler perfor- mance and reliability. The boiler can be arranged for space heating or combination space heating and domestic hot water heating with the use of an Alliance indirect-fired water heater. In addition, the compact design and minimum side clearances make the Series 8H ideal for pre-made manifolds available from Burnham for modular and/or multiple boiler installations. Constructed with durable cast iron sections. The pinned heating surfaces of these sections along with the vertical flue design extracts maximum heat losses. This results in higher efficiencies and lower fuel costs. The aluminized steel burners are designed and precision-tuned to provide optimum air flow for high combustion efficiency, smooth and quiet light off and long life. Multi-family dwellings, small businesses and office complexes are typical applications for the Series 8H boiler. Features include top mounted drafthood, rugged cast iron nipple joint sections, deluxe insulated jacket, durable cast iron sections for long life, aluminized steel burners and factory assembled gas manifold with plugged test tapping. Elminaire® air eliminator, pressure temperature gauge and safety relief valve. The Series 8H is stocked as a knockdown unit. Knockdown units are shipped with sections assembled and mounted on the base with manifold and burners installed.

Sizes 806 and 807 supplied with EI-CSD-1 Controls. Provides electronic ignition, 100% safety shut-off, electronic supervision of pilot and intermittent pilot operation. High limit w/manual reset and LWCO with manual reset must be added for commercial applications. Not required for residential applications except as defined by local jurisdiction codes.

Size 808 thru 810 supplied with EP-CSD-1 Controls. Provides electronic ignition, 100% safety shut-off, electronic supervision of pilot and intermittent pilot operation. Prewired control cabinet with RM7890 and indicator lights. Includes L4006E and 750P-MT manual reset controls.

CAT. NO. MFG. NO. INPUT BTUH

2W756H K806 2W757H K807 2W758H K808 2W759H K809 2W760H K810

GROSS OUTPUT BTUH

330,000 264,000 396,000 317,000 462,000 370,000 528,000 422,000 594,000 475,000

NET WATER RATING 230,000 275,000 321,000 367,000 413,000

DIMENSIONS H x W x D VERTICAL DIVERTER HEIGHT*

32-1/2 x 23-3/4 x 32-7/16” 27-3/4” 32-1/2 x 27-1/2 x 32-7/16” 28-3/4” 32-1/2 x 31-1/4 x 32-7/16” 30-3/4” 32-1/2 x 35 x 32-7/16”

33-1/2” 32-1/2 x 38-3/4 x 32-7/16” 33-1/2”

SUPPLY & RETURN CONNECTIONS 2” 2” 2” 2” 2”

GAS

CONNECTION 1” 1” 1” 1” 1”

FLUE WEIGHT EACH

8” 9” 9”

10” 10”

780 885 990

1095 1206

$5,848.61 $6,848.39 $9,868.75 $10,425.54 $10,989.96

Series 8H

AIR IN THE SYSTEM

A couple of boiler service problems seem to continue to plague our customers. The problems tend to be a lack of heat to the ex- ternal radiation, be it the entire radiation, or only a portion of the total radiation. The problem occurs mainly on hot water heat- ing systems. If the heating appliance is sized correctly, and the radiation is sized correctly, the lack of heat is assumed to be an equipment malfunction (I.E.: Aquastat isn’t controlling correctly. The aquastat temperature is raised to get heat to the radiation.) While an equipment malfunction is possible, we have found the overwhelming cause of the lack of heat to be system malfunc- tion, rather than equipment malfunction. Thru many trials, it has been determined the number one cause of this problem is air in the system. Numerous contractors have explained in detail how they have purged the system, that they have an air scoop on the discharge line and they are positive air cannot be the problem. Inevitably, when questioned about air vents, it is determined vents are sorely lacking in strategic locations on the system, or in the area that is suffering from a lack of heat. To check the analysis, simply use a humidifier tap valve and attach it to the piping (Normally 7/8” copper tubing) and use it as a manual air vent to determine if there just might be an air blockage in the system. Upon bleeding, should the piping/radiation warm up, the problem is solved. Obviously this isn’t the only possible cause, but it is very prevalent. The use of the humidifier tap valve test is recommended to anyone experiencing this problem on a job. It’s an inexpensive service tool and may resolve the problem.

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BOILERS