AERCO BMK 1.5 LN July 2011 - Manual (Page 80)

CHAPTER 7: MAINTENANCE
Page 80 of 152 PR2: 05/09/12
Benchmark 1.5LN Low NOx Boiler
Operation and Maintenance Manual
OMM-0041_0D
GF-120
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
7.7 CONDENSATE DRAIN TRAP
The Benchmark 1.5 Boiler contains a condensate trap as shown in Chapter 2, Figure 2-5. The
trap is located external to the unit and attached to the drain pipe from the exhaust manifold. This
trap should be inspected and, if necessary, cleaned to ensure proper operation.
NOTE
There are two slightly different types of condensate traps that may
be used in your configuration; an older style without an inlet
adapter, and a newer style with a built-in adapter (see Figure 7.5).
Maintenance is the same, except that the newer style does not
need an orifice gasket (Step 6).
To inspect and clean the trap, proceed as follows:
1. Disconnect the external condensate trap by loosening the union pipe connection between
the trap and the exhaust manifold drain pipe.
2. Remove the connections on the inlet and outlet sides of the condensate trap shown in
Figure 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.
Reconnect trap to exhaust manifold drain.
Figure 7-5: External Condensate Trap