VENTING, INLET AIR AND CONDENSATE
F.EXHAUST TAPPING FOR VENT SAMPLE
To obtain a combustion sample a hole must be drilled in the exhaust vent pipe just above the first elbow at the outlet of the boiler.
a.Drill a 21/64" diameter hole in the vent pipe just above the first elbow.
b.Tap the hole with a 1/8" NPT Pipe Tap.
c.Take combustion samples through the tapped hole.
d.Thread a standard 1/8" NPT Pipe Plug into the hole.
G.CONDENSATE DRAIN INSTALLATION
1.This boiler is a high efficiency unit that produces condensate. The condensate must be drained from the unit.
2.The white hose under the unit is a condensate trap which prevents products of combustion from exiting the boiler through the condensate drain.
3.The black plastic 3/4" NPT fitting at the left rear corner of the boiler is intended for connection to plastic piping. Do not block vent hole at the top of the fitting.
4.Slope the condensate drain piping down away from the unit into a floor drain or condensate pump.
Check with local codes or ordinances to determine if the condensate must first be neutralized before running it to a drain.
CAUTION
Make sure the condensate drain piping is below the level of the boiler to prevent condensate from filling up the combustion chamber and damaging the boiler.
5.Do not route the condensate piping through unheated spaces that may reach freezing temperatures.
6.Use only plastic piping for the condensate drain line. Metal pipes will corrode and cause blockage of the condensate drain.
7.To allow for proper drainage on large horizontal runs, a second line vent may be required and the required tubing size may increase to 1" I.D.
8.A condensate removal pump is required if the boiler is below the drain.
H.BOILER REMOVAL FROM COMMON VENTING SYSTEM
1.At the time of removal of an existing boiler from a common venting system, follow these steps with each appliance that remains connected. These steps are to be completed while all components which remain connected to the common venting system are not in operation.
a.Seal any unused openings in the common venting system.
b.Visually inspect the venting system for proper size and horizontal pitch. Verify there is no blockage or restriction, leakage, corrosion, and other deficiencies which could cause an unsafe condition.
c.Where practical, close all building doors and windows, including interior doors between the space in which the appliances that remain connected to the common venting system are located and other areas of the building.
d.Turn on any clothes dryers and any appliance not connected to the common venting system. Turn on any exhaust fans, such as range hoods and bathroom exhaust fans, at their maximum speed. (Do not operate a summer exhaust fan).
e.Close fireplace dampers.
f.Place the appliance being inspected in operation. Follow the lighting instructions and adjust the thermostat so that the appliance operates continuously.
g.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.
h.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
i.Any improper operation of the common venting system should be corrected so that the installation conforms with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or CAN/CGA B149.
j.The common venting system should be resized to approach the minimum size determined by using the appropriate tables located in the National Fuel Gas Code, ANSI Z223.1/NFPA 54, "Sizing of Category I Venting."
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