AERCO BMK 2.0 LN Dual Fuel Serial G-11-2402 and UP - Manual (Page 80)

CHAPTER 7: MAINTENANCE
Page 80 of 160 PR2: 04/22/13
Benchmark 2.0LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0052_0E
GF-127
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
19. Beginning with the burner assembly removed in step 17, reinstall all the components in the
reverse order that they were removed. During re-assembly, replace the gaskets for the
blower and flame detector with new ones.
20. Be sure to align the igniter-injector and flame detector tapped holes in the burner plate with
the heat exchanger top head.
21. Check to ensure that the grounding screw is installed.
7.7 CONDENSATE DRAIN TRAP
The Benchmark 2.0LN 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 inlet 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 7-7.
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.