AERCO BMK 3.0 LN Natural Gas July 2011 - Manual (Page 57)

MAINTENANCE
7-5
3. Loosen the four (4) thumbscrews securing
the cover on the condensate trap. Remove
the cover.
4. Remove the float from the condensate trap.
5. Remove the orifice gasket from the trap.
6. Thoroughly clean the trap, float and gasket.
Also inspect the drain piping for blockage. If
the trap cannot be thoroughly cleaned,
replace the trap.
7. After the above items have been inspected
and thoroughly cleaned, replace the orifice
gasket and float in the condensate trap and
replace the trap cover.
8. Reassemble all piping and hose connections
to the condensate trap inlet and outlet.
9. Reconnect the condensate trap adaptor to
connecting manifold drain pipe, Ensure that
the trap is level and then tighten the adaptor
thumbscrew. Place a suitable support under
the trap to maintain it in the level position.
FLOAT
THUMB
SCREWS
(4)
3/4 NPT
PORT
INLET
OUTLET
3/4 NPT
PORT
COVER
O-RING
ORIFICE
GASKET
Figure 7-5
External Condensate Trap
7.7.2 Exhaust Manifold Condensate Trap
The exhaust manifold condensate trap also
contains a float and orifice gasket similar to
those shown in Figure 7-5. The only difference is
that the orifice gasket in the exhaust manifold
trap has a 0.75" I.D. opening and the gasket
shown in Figure 7-5 has a 0.25" I.D. To inspect
and clean the trap, refer to Figure 7-6 and
proceed as follows:
1. Loosen the clamp securing the hose to the
condensate drain (Figure 7-6). Disconnect
the hose.
2. Remove the four bolts securing the flue to
the top of the exhaust manifold. Separate the
flue from the exhaust manifold.
3. From the top of the exhaust manifold,
remove the float and orifice gasket from the
condensate trap.
4. Thoroughly clean the trap, float and gasket.
Also, inspect the drain hose for blockage.
5. After the above items have been inspected
and cleaned, replace the gasket and float in
the condensate trap.
6. Replace the four bolts securing the flue to the
exhaust manifold and connect the hose to
the manifold condensate drain.
UNIT
FRAME
EXHAUST
MANIFOLD
CONDENSATE
TRAP
DRAIN
HOSE
CLAMP
1" I.D.
HOSE
TO FLOOR
DRAIN
BOLTS
(4)
FLUE
Figure 7-6
Exhaust Manifold Condensate Trap &
Drain