Disconnect the flared fitting to the oil line and remove the aluminum thumb-nut from the nozzle line. Remove the combustion head assembly from the air tube. Rotating the assembly upside down will ease removal. Inspect the nozzle for size and type, refer to Table 6 of this manual.

ii.To change a nozzle, loosen the clamp screw on the retention ring assembly and slide the retention ring off the adaptor.

Install and tighten the proper nozzle in the adaptor. See Table 6 of this manual. Be careful not to damage the electrode insulators or to bend the wires.

iii.Replace the retention ring assembly, slipping one of the riveted arms through the 1/8-inch gap between the electrode tips. This arm should be straight up. Also, be sure that the retention ring clamp is tight against the shoulder on the adaptor. Then tighten the clamping screw.

iv.Check the electrode settings specified as follows and shown in Figure 27B. 1/8-inch gap, 1/4-inch above the nozzle centerline, and 3/16-inch ahead of the nozzle tip.

v.Re-install the combustion head assembly into the air tube. It may be necessary to turn nozzle line assembly upside down to ease insertion into the air tube. Then the threaded adapter on the end of the nozzle line is passed through the opening in the left side of the housing.

vi. Run the aluminum (knurled) thumb-nut onto the nozzle line and tighten hand-tight.

vii. Connect the flared fitting on the copper oil line to the nozzle line and tighten.

viii.Swing the transformer to the closed position, rotate latches and tighten screws.

b.Combustion Head Setting/Adjustment

i.Verify combustion head setting, refer to Table 6 of this supplement. Read the scale embossed in the housing, which is calibrated in 1/16-inch divisions (dimension ‘A’)

the position of the flame retention ring in relation to the air cone can be determined at a glance. Refer to Figure X.

ii.By moving the electrode and combustion head assembly forward or backward, the location of the flame retention ring relative to the throttle ring can be controlled. Refer to Figure 7A.

By loosening the locking screw and thumb- nut and turning the adjusting screw using a 5/32-inch allen wrench, the assembly can be

Figure 7A: Combustion Head Adjustment

moved to the required position.

Turn the adjusting crew clockwise to move the combustion head forward, increasing the ‘A’ dimension, counterclockwise will pull the head back, decreasing the ‘A dimension. To lock in place, first tighten the thumb-nut and then the locking screw.

c.Initial Air Shutter/Band Setting

i.The air shutter has a pointer which indicated the percent of opening against a calibrated scale (9 = 90%, fully open = 100%). The setting is locked in place by a screw just above the fuel unit.

ii.The air band is adjusted by loosening the screw, rotating the air band and then locked in place after final adjustment. Refer to Table 6 of this manual for initial settings.

iii.The burner is now set at the approximate air band setting for the gallonage indicated. During final adjustment, using combustion testing equipment, the air band may need minor adjustment to achieve the desired efficiency.

Water Boilers Only

Knockdown V87 - V89 boilers are provided with one nozzle, installed in the burner, that provides the same firing rate as the steam boiler of the same size.

Inspect the installed nozzle and assure that the nozzle is the correct size and type as specified in Table 6 of this manual. The nozzle input is stamped on the hex flat of the nozzle.

Refer to Paragraph K, 7, a for burner drawer assembly removal.

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Burnham V8 Series manual Combustion Head Adjustment, Water Boilers Only
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V8 Series specifications

The Burnham V8 Series is a prestigious line of oil-fired boilers renowned for their efficiency, reliability, and advanced design features. Tailored for residential and light commercial applications, this series exemplifies the perfect blend of tradition and modern technology, ensuring long-term performance and comfort for users.

One of the hallmark features of the Burnham V8 Series is its exceptional cast iron construction, which provides durability and superior heat retention. This robust design allows for an extended lifespan while ensuring that the boiler can withstand the rigors of daily use. The cast iron sections are engineered to facilitate optimal heat transfer and efficiency.

The V8 Series boasts an impressive fuel efficiency rating, often exceeding 85%. This high efficiency is achieved through a combination of advanced combustion technology and the boiler's thoughtful design, which minimizes heat loss. Users benefit not only from lower energy bills but also from a reduced environmental footprint, making the Burnham V8 Series a sustainable choice for heating solutions.

In terms of technology, the Burnham V8 Series features a standing pilot ignition system or an optional intermittent ignition device that enhances safety and efficiency. The advanced burner design allows for smooth operation and excellent fuel utilization, further contributing to the overall economy of the system.

Another notable characteristic is the versatility of the Burnham V8 Series. It can be easily adapted to work with various heating systems, including hot water heating applications. Its compatibility with different fuels, such as natural gas or oil, gives users the flexibility to choose the best energy source for their needs, providing longevity and value.

The installation process is made straightforward with ample connectivity options for plumbing and flue. Its compact design enables easier placement within homes or commercial spaces without compromising performance. Furthermore, the boiler is backed by extensive warranties, ensuring peace of mind for homeowners and businesses alike.

In conclusion, the Burnham V8 Series stands out as a reliable and efficient heating solution, blending robust construction with advanced technology. Its commitment to performance, versatility, and efficiency makes it an excellent choice for meeting the heating demands of various applications while promoting environmental responsibility. Whether for a single-family home or a light commercial building, the Burnham V8 Series remains a trusted leader in the industry.
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