Smith Cast Iron Boilers GT Series Combustion Air, General Venting Guidelines, Clearances, Service

Page 4 GT INSTALLATION AND OPERATION INSTRUCTIONS

Table 1 - Clearances
	Combustible		Service
	Clearance		Clearance
Surface	in	mm	in	mm
Front	0	0	24	610
Back	0	0	0	0
Sides	0	0	12	305
Top	0	0	12	305
Bottom - 150 & 200	0	0	12	305
Bottom - 400	0	0	0	0
Flue Pipe - enclosed	2	51	n/a	n/a
Flue Pipe - in free air	0	0	n/a	n/a

COMBUSTION AIR

WARNING: This boiler must be supplied with combustion air in accordance with Section 5.3, Air for Combustion & Ventilation, of the latest revision of the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and all applicable local building codes. Failure to provide adequate combustion air for this boiler can result in excessive levels of carbon monoxide which can result in severe personal injury or death!

WARNING: Never operate this boiler unless the air intake is connected to the outdoors. Failure to comply with this warning can result in excessive levels of carbon monoxide causing severe personal injury or death!

WARNING: Each boiler must have it’s own intake air system. Common intake air systems are not to be used! Improper installation can result in excessive levels of carbon monoxide which can cause severe personal injury or death!

To operate properly and safely this boiler requires a continuous supply of air for combustion. NEVER store objects around the air inlet!

Use appropriate adapters to increase the 11⁄2 in, 38 mm air inlet collar to 3 in, 76 mm at the boiler, GT-150 & 200, Figure 2. Use a 2 in, 51 mm to 4 in, 102 mm adapter on the GT-400. Terminate the air inlet system per the instructions found in the venting sections that follow.

Figure 2 - Air Inlet System Attachment

One of the following materials is to be used for the air intake pipe:

•GT-150 & 200: 3 in, 76 mm, PVC Sch.40 pipe or Galvanized Steel pipe.

•GT-400: 4 in, 102 mm or 6 in 152 mm, PVC Sch.40 pipe or Galvanized Steel pipe.

See Table 2 for the maximum equivalent air intake system length.

CAUTION: Combustion air contaminated with fluoro- carbons or other halogenated compounds such as cleaning solvents, refrigerants, chloride, flouride, bromine or iodine will result in the formation of acids in the combustion chamber. These acids will cause premature failure of the boiler voiding the warranty!

GENERAL VENTING GUIDELINES

WARNING: The vent installation must be in accordance with Part 7,Venting of Equipment, of the latest revision of the National Fuel Gas Code, ANSI Z223.1/NFPA 54 applicable provisions of the local building codes. Improper venting can result in excessive levels of carbon monoxide which can result in severe personal injury or death!

NOTE: Compliance with code requirements doesn’t insure a satisfactory installation; good common sense must also be applied.

WARNING: Each boiler must have it’s own vent system. Common positive pressure vent systems are not to be used! Improper installation can result in excessive levels of carbon monoxide which can cause severe personal injury or death!

WARNING: Field supplied piping and fittings are required to complete installation. The combustion air and vent pipe and fittings must conform to ANSI and ASTM standard D1785 for schedule 40 PVC, D2665 for PVC-DWV, and D2661 for ABS-DWV. Pipe cement and primer must conform to ASTM standard D2564 for PVC or D2235 for ABS. Improper venting can result in excessive levels of carbon monoxide which can result in severe personal injury or death!