Service manual

SC Series Boilers – Installation and Service Manual

These chemicals are especially commons near swimming pools, beauty shops, dry cleaning

establishments, laundry areas, workshops, and garages. The warranty is void when failure is due to

corrosion.

2.6 VENTING AND COMBUSTION AIR

Definitions: A direct vent system operates so that all air for combustion is obtained from the

outdoor atmosphere and all flue gases are discharged to the outdoor

atmosphere.

A non-direct vent system operates so that all air for combustion is obtained

from the boiler room and all flue gases are discharged to the outdoor

atmosphere.

This boiler is certified as a Category III appliance only. This boiler can be installed similar to a Direct

Vent Appliance (with an inlet air duct and a venting duct) but it shall have the same air supply as a

Category III appliance is required to have.

Combustion Air Supply

For a non-direct vent or direct vent installations, a sufficient air supply MUST be provided to the boiler

room and to the boiler. Air opening(s) to the boiler room provide the air for combustion and ventilation

and are always required. The air opening size and location (as well as other air supply considerations)

must conform to Section 2.2.

The boiler room must never be under a negative pressure in all applications, including direct vent alike.

Always provide air openings sized not only to the dimensions required for the total input of all fuel-fired

appliances in the boiler space, but also to handle the air movement rate of any exhaust fans or air

movers using air from the building or space.

The venting terminations must always be kept clear of obstructions (i.e. snow, ice, etc.). Louvers and

grilles used in the air supply and ventilation system must conform to Section 2.2 and should be kept clear

of any dust, dirt, or debris, which will block proper airflow.

The responsibility of providing a suitable venting and air intake pipe of adequate draft capacity and in

good usable condition is that of the gas fitter/installer. Interference with the air supply for the boiler shall

be prohibited.

For boilers to be connected to gas vents or chimneys, vent sizing, installation and termination shall be in

accordance with Part 7, Venting of Equipment, of the National Fuel Gas Code, ANSI Z223.1 or Section 7,

Venting Systems and Air Supply for Appliances, of the CAN/CSA B149, Installation Codes, and all

applicable provisions of the local building codes. Contact local building or fire officials about restrictions

and installation inspection in your area.

Air Intake System

When the boiler is installed as a direct vent system, ABS, PVC schedule 40 pipe, galvanized steel pipe,

PVC pipe and CPVC pipe can be used for air intake pipe. The air intake pipe may be sealed using

appropriate sealants.

Exhaust Vent System

This boiler is certified as Category III and requires stainless steel exhaust venting suitable for positive

pressure. The following manufacturers offer components approved for use with this boiler:

• Flexmaster Canada Ltd.: Z-Vent

• Z-Flex U.S.,Inc.: Z-Vent

• Heat-Fab Inc.: Saf-T-Vent

• Flex-L International Inc.: StaR-34

• Protech Systems, Inc.: FasNSeal