Condensate Removal - IBC VFC 15-150 Installation And Operating Instructions Manual

WARNING
Fill trap with water before
boiler is first fired to prevent
exhaust fumes from entering
room. Never operate the
boiler unless the trap is filled
with water.
Failure to comply will result
in severe personal injury or
death.
WARNING
If condensates are to be
discharged into building
drain piping materials that
are subject to corrosion, a
neutralization package must
be used.
CAUTION
When a condensate
neutralization package
is installed, the pH of the
condensate discharge must
be measured on a regular
schedule to ensure the
neutralizing agent is active
and effective.
1-14
VFC 15-150, VFC 45-225 MODULATING GAS BOILERS
1.5

CONDENSATE REMOVAL

IBC's specified vent configuration promotes the safe drainage of moisture from the
boiler and exhaust venting without flowing liquids back through the heat exchanger
(as done by other condensing boilers). Reliable system operation requires (1)
proper design and installation of exhaust venting to allow condensate to run back
to the drain/trap; (2) proper trap depth to handle maximum potential pressure
within the vent, and (3) acid neutralization as appropriate. To achieve these:
1. Allow for a 1/4" per foot slope back to the trap connection, with appropriate
hangers to maintain that gradient; do not use 2" pipe on horizontal runs - air
friction from the fast moving exhaust at high fire in a 2" pipe can overcome
gravity even with the specified slope, leaving a pool of condensate at the
next upturned elbow; do not transition between pipe diameters on horizontal
vent runs – always place any reducing couplers in the vertical run)
Ensure a trap is established as described below.
2.
When required, add (and maintain in good condition) a neutralization tank.
3.
1.5.1 Condensate Trap
When installling the condensate trap, please take into account the following:
•
Must be piped to within 1" of a drain or be connected to a condensate pump.
•
Drainage line must slope down to the drain at a pitch of 1/4" per foot so
condensate runs towards the trap
•
If necessary, the drain connection tee can be laid so the main axis is
horizontal; ensure the drain tee is as close as possible to the vent riser to
avoid water bypass and pooling.
•
Most installers prefer to run the combustion air intake pipe alongside the vent,
both to the left side of the boiler to keep the area right of the unit clear for
system water piping.
•
Use the supplied PVC unions for easy access for cleaning. Locate on the
vertical legs as per Figures 15 and 16. Earlier installations may have a single
union at base of the trap (as shown in Figure 13).
•
Condensate traps should be checked every 2 months, and cleaned and
refilled as necessary.
INSTALLATION AND OPERATION INSTRUCTIONS