UTICA BOILERS JE Installation Manual download pdf (Page 12)

Removing Existing Boiler From Common Venting

System

When existing boiler is removed from common venting

system, common venting system is likely to be too large for

proper venting of appliances remaining connected to it.

At time of removal of existing boiler, following steps shall

be followed with each appliance remaining connected to

common venting system placed in operation, while other

appliances remaining connected to common venting system

are not in operation.

Seal any unused openings in the common venting

system.

Visually inspect the venting system for proper size and

horizontal pitch and determine there is no blockage or

restriction, leakage, corrosion and other deciencies which

could cause an unsafe condition.

Insofar as is practical, close all building doors and

windows and all doors between the space in which the

appliances remaining connected to the common venting

system are located and other spaces of the building.

Turn on clothes dryers and any appliance not connected

to the common venting system. Turn on any exhaust

fans, such as range hoods and bathroom exhausts, so

they will operate at maximum speed. Do not operate a

summer exhaust fan. Close replace dampers.

Place in operation the appliance being inspected. Follow

the lighting instructions. Adjust thermostat so appliance

will operate continuously.

Test for spillage at the draft hood relief opening after

5 minutes of main burner operation. Use the ame of

a match or candle, or smoke from a cigarette, cigar or

pipe.

After it has been determined that each appliance remaining

connected to the common venting system properly vents

when tested as outlined above, return doors, windows,

exhaust fans, replace dampers and any other gas-burning

appliance to their previous conditions of use.

Any improper operation of the common venting system

should be corrected so the installation conforms with

the National Fuel Gas Code, ANSI Z223.1/NFPA 54.

When resizing any portion of the common venting

system, the common venting system should be resized

to approach the minimum size as determined using the

appropriate tables in Chapter 13 of the National Fuel

Gas Code, ANSI Z223.1/NFPA 54.

Shown is suggested size of xed

bafe for different size risers.

Bafe Size (Inches)

Riser 8 10 12

A 6 8 10

Flue Connection And Venting - Continued

In certain cases where these short rises of less than 4

feet have been used, spillage of combustion products has

occurred at the draft-hoods farthest from the chimney.

Assuming the chimney is adequately sized, one acceptable

method to correct this spillage problem is to permanently

bafe the riser(s) closest to the chimney to reduce the

excess of room air entering those draft-hoods. DO NOT

BAFFLE ENOUGH TO CAUSE SPILLAGE. The use of xed

bafes in the short risers above the boiler draft-hood are

acceptable as spelled out in American National Standard

NFPA 54/ANSI Z223.1 National Fuel Gas Code, latest

revision.

Fabricate these xed bafes, using 20-gauge steel. See

Figure #6. Permanently attach the bafe to the inside of

the riser(s). Trial and error will dictate the degree to which

each should be positioned to avoid draft-hood spillage

at the far end of the boiler. Be careful to avoid bending

the xed bafe so it will obstruct the ue gas ow in the

horizontal collector.

VENT INSTALLATION

Figure 6

IMPORTANT: Extend chimneys at least 2 feet above any

object within radius of 15 feet, including roof.

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UTICA BOILERS JE Installation Manual Page 12

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