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6.8 Multiple Boiler Venting Installation
• Multiple boiler application boiler shall be vented
individually.
• Follow guidelines as described in figures 6-1 through
6-7.
6.9 Condensate Piping
• Use materials acceptable to authority having jurisdiction.
In absence of such authority:
• USA - PVC or CPVC per ASTM D1785/D2845 Cement
or primer per ASME D2564 or F493.
• Canada - CSA or ULC certified PVC/CPVC pipe,
fittings and cement.
• Attach condensate trap provided with boiler and field
sourced piping to condensate drain at bottom of boiler.
See figure 6-17.
• Slope condensate drain pipe minimum 1/4" per foot
(21mm/m) away from boiler.
• Use field source condensate pump if boiler located
below disposal point.
• Field source condensate neutralizing kit as required
by authority having jurisdiction or for environmentally
friendly condensate disposal.
6 - COMBUSTION AIR AND VENT PIPING
30
FIGURE 6-18 Condensate Drain
Condensate Trap
(field installed)
on condensate drain
pipe
End must be
left open.
Do not place in environment
with temperatures below
freezing. Condensate outlet
will block if condensate
freezes.
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