AERCO BMK 3.0 LN Nat. Gas Jan 2011 - Manual (Page 57)

MAINTENANCE
3. Loosen t he f our ( 4) thum bscrews s ecuring
the c over on the c ondensate tr ap. Rem ove
the cover.
4. Remove the float from the condensate trap.
5. Remove the orifice gasket from the trap.
6. Thoroughly c lean t he tr ap, f loat an d gas ket.
Also inspect the drain piping for blockage. If
the tr ap c annot b e tho roughly c leaned,
replace the trap.
7. After the ab ove it ems have bee n ins pected
and t horoughly c leaned, r eplace the or ifice
gasket and f loat in t he c ondensate tr ap a nd
replace the trap cover.
8. Reassemble all piping and hose connections
to the condensate trap inlet and outlet.
9. Reconnect the c ondensate tr ap ad aptor to
connecting m anifold dr ain pip e, Ens ure th at
the trap is level and then tighten the adaptor
thumbscrew. Pl ace a s uitable s upport u nder
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 ex haust m anifold c ondensate tr ap a lso
contains a f loat and or ifice gas ket s imilar to
those shown in Figure 7-5. The only difference is
that the or ifice gasket in t he ex haust m anifold
trap has a 0.7 5" I.D. o pening and th e gas ket
shown in Figure 7-5 has a 0.25" I.D. To inspect
and c lean th e tr ap, r efer to F igure 7- 6 an d
proceed as follows:
1. Loosen t he c lamp s ecuring the h ose to th e
condensate dr ain ( Figure 7- 6). Dis connect
the hose.
2. Remove the f our bol ts s ecuring th e f lue to
the top of the exhaust manifold. Separate the
flue from the exhaust manifold.
3. From the top of the e xhaust m anifold,
remove the f loat a nd or ifice gas ket f rom the
condensate trap.
4. Thoroughly c lean t he tr ap, f loat an d gas ket.
Also, inspect the drain hose for blockage.
5. After the ab ove it ems have bee n ins pected
and cleaned, replace the gasket and f loat in
the condensate trap.
6. Replace the four bolts securing the flue to the
exhaust m anifold a nd c onnect the hos e t o
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
7-5