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Benchmark 3.0LN 24-Month Maintenance Kit 58015-04
Technical Instruction Document
TID-0135_0C
10
/12/2017
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, New York 10913
•
Phone: 800-526-0288
Page 12 of 20
7. Inspect and clean the exhaust manifold as necessary.
8. Replace the exhaust manifold seal (P/N
49102
) with the new seal provided in the kit.
Install the adhesive-backed seal in the recess of the exhaust manifold flange (Figure 9)
so that the adhesive side is in contact with the exhaust manifold.
9. Align the exhaust manifold with the upper flange of the secondary heat exchanger.
Secure the manifold in place using the five (5) bolts removed in step 4. Also, replace the
hex nuts on the three (3) PEM studs. Alternately tighten the bolts and nuts to obtain a
uniform seal.
10. From the opening at the top of the manifold, install the new orifice gasket (0.75" I.D., P/N
81098
) provided in the kit. Ensure that the gasket is lying flat in the bottom of the
condensate trap.
11. Next, insert the condensate float (with guide attached) into the trap.
12. Reconnect the 1-1/2" I.D. drain hose to the condensate trap drain opening.
13. Reconnect the flue starter section and collar to the top of the exhaust manifold using the
bolts removed in step 1.
14. Benchmark 3.0LN units also contain a second, external condensate trap. This trap is
attached to the exhaust manifold at the rear of the unit using an adapter. Disconnect this
trap from the manifold and perform the procedure described in section 6.2.2.
15. Upon completion of the procedure described in section 6.2.2, reconnect the condensate
trap to the 1-1/2" pipe on the connecting manifold.