CONNECTING THE VENT DAMPER
AND VENT CONNECTOR
Refer to Fig. 1 flue diagram for the size and location of the vent (flue opening). Use a 28 gauge (minimum) galvanized pipe to connect to the chimney
IMPORTANT - The damper blade on the furnished vent damper has a !/2square inch hole (approximately 3/4"diame- ter). On boilers equipped with standing pilot, the hole must be left open. On boilers equipped with intermittent ignition, the hole should be plugged by using the plug supplied with the vent damper.
1.Position furnished vent damper on top of flue outlet collar. Fasten damper securely to flue outlet collar with sheet metal screws. Make sure damper blade has clearance to operate inside of diverter.
On 2 section boilers equipped with vent damper, the supplied
all fittings securely
As An Option
The damper may be installed in any horizontal or vertical position, closer to the flue outlet collar preferred. Follow the diagrams - Figures 9, 10 and 11.
2.Install the vent damper to service only the single boiler for which it is intended. The damper position indicator shall be in a visible location following installation. Locate the damper so that it is accessible for servicing.
3.The damper must be in the open position when appliance main burners are operating.
4.The boiler is equipped with a factory wired harness that plugs into the vent damper.
5.Vent pipe must be same size as the flue outlet collar, except 2 section boilers with vent damper as noted above.
6.Slope pipe up from boiler to chimney not less than V4" per foot.
7.Run pipe as directly as possible with as few elbows as possible.
8.Do not connect to fireplace flue.
9.End of vent pipe must be flush with inside face of chimney flue. Use a
10.Horizontal run should not be longer than 3/4the chimney height (HT) (Fig. 8)
The sections of vent pipe should be fastened with sheet metal screws to make the piping rigid. Horizontal portions of the vent system must be supported to prevent sagging. Use stovepipe wires every 5'to support the pipe from above. If the vent pipe must go through a crawl space, double wall vent pipe should be used. Where vent pipe passes through a combustible wall or partition, use a ventilated metal thimble. _he thimble should be 4 inches larger in diameter than the vent pipe
| FLUE | AREA IN INCHES |
|
Boiler Input |
| "HT. |
|
Btuh | "HT | "HT | |
| 25 Ft Up | ||
Up to 100,000 | 6x6 | 6x5 | 5×5 |
Up to 155,000 | 6x7 | 6x6 | 6×5 |
Up to 230,000 | 7x8 | 7x7 | 6×7 |
Up to 350,000 | 9x9 | 8x9 | 8×8 |
"HT - top of thimble to top of flue. See F_g 8. For boiler input refer to table, page 2
For intormaliOn only - no{ meant to imply minimum s_zes
MINIMUM VENT PIPE CLEARANCE
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.
REMOVING EXISTING BOILER FROM
COMMON VENTING SYSTEM
When an existing boiler is removed from a common venting system, the common venting system is likely to be too large for proper venting of the appliances remaining connected to it.
At the time of removal of an existing boiler, the following steps shall be followed 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.
1.Seal any unused openings in the common venting system.
2.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.
3.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
4.Place in operation the appliance being inspected. Follow the lighting instructions Adjust thermostat so appliance will operate continuously.
5 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
6.After it has been determined that each appliance remain- ing connected to the common venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any other
