PB Heat DE User Manual download pdf (Page 17)

VENTING

E. BOILER REMOVAL FROM COMMON

VENTING SYSTEM

At the time of removal of an existing boiler, follow these

steps with each appliance remaining connected to the

common venting system placed in operation, while the

other appliances remaining connected to the common

venting system are not in operation:

a. Seal any unused openings in the common venting

system.

b. Visually inspect the venting system for proper size

and horizontal pitch and determine there is no

blockage or restriction, leakage, corrosion and other

deficiencies which could cause an unsafe condition.

c. 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 any clothes dryers and any

appliance not connected to 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

fireplace dampers.

d. Place in operation the appliance being inspected.

Follow the lighting instructions. Adjust thermostat so

appliance will operate continuously.

e. Test for spillage at the draft hood relief opening after

5 minutes of main burner operation. Use the flame

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

cigar, or pipe.

f. 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, fireplace dampers and

any other gas-burning appliance to their previous

conditions of use.

g. Any improper operation of the common venting

system should be corrected so that the installation

conforms with the National Fuel Gas Code, ANSI

Z223.1/NFPA 54 and/or CAN/CSA B149.1, Natural

Gas and Propane Installation Code. 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 the National Fuel Gas Code,

ANSI Z223.1/NFPA 54 and/or CAN/CSA B149.1,

Natural Gas and Propane Installation Code.

Figure 4.5: Direct Exhaust Vertical Venting

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