Utica Boilers MGB Series II/MGC Series Installation Instruction

12

Do not connect boiler to any portion of 

mechanical draft system operating under 

positive pressure.

     

Wood and other combustible materials must not be 

closer than 6” from any surface of single wall metal 

vent pipe. Listed Type B vent pipe or other listed 

venting systems shall be installed in accordance with 

their listing.

When an 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 the 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 deficiencies 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 fireplace 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 flame 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, 

fireplace 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 re-sizing any portion of 

the common venting system, the common venting 

system should be re-sized to approach the 

minimum size determined using the appropriate 

tables in Chapter 13 of the National Fuel Gas 

Code, ANSI Z223.1/NFPA 54.

Boiler and venting installations shall be 

performed by a qualified expert and in 

accordance with the appropriate manual. 

Installing or venting boiler or other gas 

appliance with improper methods or materials 

may result in serious injury or death due to 

fire or to asphyxiation from poisonous gases 

such as carbon monoxide with is odorless and 

invisible.