Toxalert BSP - Manual

LEAD/LAG CONTROLLERS MODEL PSP & BSP
GENERAL DESCRIPTION:
Toxalert has two basic lead/lag controller types. One designed for dual circulating pumps and the
other to automatically sequence boilers when they are to be controlled in a lead/standby sequence.
ON-OFF AUTO:
Both controller types feature an internal ON-OFF-AUTO switch mounted on the printed circuit board
that operates the controlled equipment. In the “AUTO” position the controller automatically operates
the controlled equipment via a SPST outdoor air thermostat. In the “ON” position the equipment is
positively turned ON, and positively turned off in the “OFF” position. The ON-OFF-AUTO switch
function can be remotely controlled by installing a three position switch remote from the Lead/Lag
controller (See technical description).
LEAD/LAG:
The LEAD/LAG switch is also mounted on the printed circuit board and is designed to choose the lead
equipment. With the switch in the R-1 (relay #1) position, pump #1 or boiler #1 is in the LEAD
position and equipment operated by relay 2 is automatically in the lag or standby position. With the
switch in the R-2 position the equipment (pump or boiler) operated by relay #2 is in the lead position,
and equipment connected to R-1 automatically becomes the lag or standby equipment. The
LEAD/LAG switch function may also be controlled remotely by simply installing a remote SPST
switch. (See technical description.)
Pump/Boiler Sequencer Panels
(CM) Custom Mount Models
PSP-10CM shown
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TOXALERT ™
TOXALERT INTERNATIONAL, Inc., PO Box 159, Mound, MN. 55364 PHONE: (952) 472-4541 • FAX: (952) 472-4960
www.toxalert.com