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BOILER MONITOR COMMUNICATIONS JUMPER W1
• Located in the upper left hand corner of the "LAST" Boiler Monitor board.
• NOTE: The jumper indicates to the System Controller logic that the "Last" wired
boiler has been communicated with over the RS485 BUSS Link.
• Definition: The "LAST" wired boiler is physically wired with the greatest wire
length from the "System Control" or is the last wired boiler for a single or multiple
boiler installation.
• On a single boiler make sure the W1 Jumper has been installed.
W1
BOILER MONITOR CARD PICTORIAL
On boiler systems the jumper (W1) MUST BE installed on the "Last" wired boiler. This
is located on the Boiler Monitor board in the upper left hand corner, adjacent to the
RS485 terminals.
On Multiple boiler systems the W1 jumper must be removed from all Boiler Monitor
boards except on the "Last" wired boiler.
For normal boiler operation the dip switch settings can be utilized to define any of the
boilers as #1 thru # (maximum), independent of the "Last" wired boiler position.
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