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GV100W BOILER
INSTALLATION & OPERATING INSTRUCTIONS
HORIZONTAL VENTING
Horizontal vent systems must be in compliance with UL 1738 for installations in the United States, ULS636 for installations in Canada.
For best results, horizontal vent systems should be as short and straight as possible.The 4" adapter must be attached directly to the boiler outlet. A vertical vent run at least 18 inches high must be installed before any horizontal run begins. If the boiler is installed using a 3" diameter vent system, a 4" to 3" diameter reducer must be installed after the 18 inch vertical run. The previously mentioned vent system manufacturers have the proper adapters and reducers available.
The vent system must be both gas tight and watertight. All seams and joints in metal pipes must be joined and sealed in accordance with the vent system manufacturers instructions. When horizontal vent runs exceed 5 feet they must be supported at 3 foot intervals with overhead hangers.
FIG. NO. 4B Horizontal Venting
Horizontal vent systems shall terminate at least 4 ft, 1.3 m, below, 4 ft, 1.3 m, horizontally from or 1 ft, 0.23 m, above any door, window or gravity air inlet into any building. It must not terminate less than 4 ft, 1.3 m, horizontally from, and in no case above or below, unless a 4 ft, 1.3 m, horizontal distance is maintained, from electric meters, gas meters, regulators and relief equipment and not less than 7 ft, 2.3 m, from any adjacent public walkway. The bottom of the vent terminal(s) shall be located at least 5 ft, 1.5 m, above the air intake terminal(s).
ATTENTION.
Au moment de l’entretien des commandes, étiquetez tous les fils avant de les débrancher. Des erreurs de câblage peuvent entraîner un fonctionnement
The hoizontal vent system must terminate with a Field Controls
8" 
4' MIN.
THIMBLE
OUTSIDE WALL | 18" MIN. |
VENT SYSTEM
BOILER
Avoid locations likely to be affected by winds, snow drifts, people and pets. Protect building materials and vegetation from degradation caused by the flue gases.
HEATING SYSTEM PIPING
CAUTION: All heating system piping must be installed in accordance with the ANSI/ASME Boiler and Pressure Vessel Code, Section IV, and ANSI/ ASME
The GV100W hot water boiler comes from the factory ready to be piped to the heating system. Each boiler is equipped with a safety relief valve which must be piped in accordance with the ANSI/ASME Boiler and Pressure Vessel Code, Section IV, see FIG. NO. 5.
The maximum vent length for 3" diameter vent systems is 20 feet, one 90° elbow and a vent terminal or 15 feet, two 90° elbows and a vent terminal. The maximum vent length of 4" diameter vent systems is 30 feet, four 90° elbows and a vent terminal. To maximize the performance of the vent system, locate 90° elbows as far from the boiler and one another as possible. The minimum horizontal vent length is 4 feet, see FIG.
NO. 4B.
The vent system must be pitched down, toward the vent terminal, 1/4" per foot. If any part of a single wall metal vent system passes through an unheated space it must be insulated with insulation rated for 450°F.
WARNING: The bottom of the vent terminal must be located at least 12 inches above grade including the maximum snow line. Failure to provide adequate vent terminal clearance for this boiler can result in excessive levels of carbon monoxide that can result in severe personal injury or death!
Ensure that the boiler is level from front to back and from side to side. Use metal shims to level the boiler. Never use combustible materials for shims.
CAUTION: To prevent damage due to excessive conden- sation, one of the following piping options should be used.
