INSTALLATION AND OPERATION INSTRUCTIONS
1-18
SL 80-399 MODULATING GAS BOILER
SL 26-260 G3, SL 40-399 G3 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
some 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) acid neutralization as appropriate. To
achieve these:
•
Allow for a 1/4” per foot slope back to the vent connection, with appropriate hangers
to maintain that gradient.
•
Ensure the supplied trap is correctly installed and filled with water.
•
When required, add (and maintain in good condition) a neutralization tank.
1.5.1 Condensate Trap
The condensate trap must be installed on the drain connection at the base of the boiler as
shown in
Figure 22.
1.5.2 Condensate Trap Assembly - Installation
1. Remove the boiler door and remove the condensate trap door by removing the 2 nuts
and washers, lower the front of the trap door and slide forward. Undo the Drain Spout
Compression Nut (E), remove the Drain Hose (G) from Trap Drain Outlet (F). Place
the Vacuum breaker cap (J) over the Vacuum breaker opening and push firmly home.
Remove the Upper Compression Nut and Washer (C) and slide over the Boiler Drain
Outlet (A).
2. Fill the trap with water and slide
the trap body (D) over the Boiler Drain Outlet (A) and tighten.
Attach the Drain Hose (G) and tighten the Drain Spout Compression Nut (E).
3. Install the Condensate Trap Door and tighten the 2 hex screws. Check for leaks.
Condensate Trap, as shipped and
disassembled
WARNING
The Trap Door must be installed
as instructed and all trap fittings
must be tightened as instructed
to prevent leakage of flue gasses.
Failure to comply may result in
severe personal injury or death.
Figure 22: Condensate trap installation
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.
1. Install
condensate
trap and tube.
2. Slide retainer around trap and
slide retainer tabs into cabinet.
3. Pass tube through retainer.
4. Secure trap with nut and
washer.
