Crown Boiler BWF Series, Supplement Manual

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1
I Basic Information
A. What is this Supplement For?
This instruction manual supplement provides important information on the installation and operation of BWF and CWD boil-
ers equipped with a S9361A control like that shown in Figure 1.0 below. The S9361A is being used in place of the control system
described in the manual supplied with this boiler in order to comply with the 2007 Energy Independence and Security Act (EISA).
The S9361A-based system saves energy using a “thermal purge” feature which first attempts to satisfy a heating demand by using
residual heat in the boiler before allowing the burners to fire. In addition, this control system offers the following new features:
Ability to operate two circulator zones without additional controls. •
Optional 24 volt low water cut-off kit #761000 that plugs directly into this control system •
LED readout of boiler status •
B. How to use this Supplement
All information and Warnings in the original manual still apply EXCEPT for the following:
Information in this manual completely replaces Section IX (“Wiring”) in the original manual a)
Section Xb (“Operation”) in this manual includes information for reading and adjusting the S9361A which is completely b)
new.
Information in this manual completely replaces Section XII (“Troubleshooting”) in the original manual c)
Section XIII (“Parts”) in this manual provides a list of replacement parts that are unique to the S9361A-based system. d)
INSTALL AND SERVICE THE BOILER IN ACCORDANCE WITH THE ORIGINAL INSTRUCTIONS EXCEPT
FOR THOSE SECTIONS LISTED ABOVE.
FIGURE 1.0: S9361A CONTROL