Modulex EXT Commercial Series Boilers User Manual
CHAPTER 8: Maintenance Schedule
OMM-0095_0H AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 121 of 144
GF-139 Phone: 800-526-0288 09/15/2017
8.3.1 Cleaning the Condensate Drain Line
In order to inspect and clean the condensate line, do the following:
1. Refer to Figure 8-1, disconnect the pipe at location “A“.
2. Check that no deposits have accumulated inside the drain. If there are any deposits flush
them out with clean water.
3. Reassemble the drain in reverse order.
Figure 8-1: Condensate Drain Location
WARNING!
Before operating the boiler, it is absolutely necessary to verify that the condensate P-trap
is filled with water. If the boiler is operated without the P-trap being properly filled, there is
a danger of toxic combustion gases escaping from the unfilled condensate drain opening.
8.4 CHECKING CSD-1 MANIFOLD FLOW SWITCH
Check the function of the flow switch in the CSD-1 manifoild at the boiler hot water outlet. If it is
not functioning, check the wiring to the terminal of the BMM module labeled “FL“ or replace with
a new flow switch.
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