Flue gas exhaust (connection at rear of boiler): condensate, and potentially rain water, flow
back from the venting system.
Air intake piping: Warning - Risk of damage to appliance. Ensure rain water is prevented
from entering.
Free flow of condensate from venting systems and the pressure vessel must be maintained
at all times. Trap and condensate drain piping must be accessible to allow regular
inspection and cleaning.
Condensate water line: Warning - Risk of damage to appliance. All condensate discharge
lines, including neutralization tank inlet, must be at a lower elevation than the condensate
water line of the appliance.
Condensate neutralizer: Drain materials subject to corrosion must be protected by acid
neutralization. Warning - Risk of injury. Tank fluid can be highly acidic. Do not use hands
to stir material. Refer to the neutralization instructions of the manufacturer. Access to the
discharge, before the drain, is necessary for proper maintenance in order to check the
effectiveness of the neutralizing agent. A simple pH test should be performed annually to
ensure neutralizing agent is still effective. If the pH falls below 6.5 the neutralizing material
should be replaced. The agent (limestone chips with a minimum calcium carbonate content
of 85%) can be purchased from a local supplier.
1" FPT inlet and outlet. Unions for ease of maintenance (ships with shown model NT-25,
IBC part 180-048).
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