Specifications

9
OPTIONAL CONTROL BOX CONNECTIONS
TERMINAL
DESCRIPTION
REMARKS
2, 3 on
CN11
(FS2)
Cooling water flow
switch
Field-installed
option
S9, S10
(BO)
Auxiliary boiler
control relay
Dry contact, 24v,
60va max load.
Closes at 185°F
(85°C), Opens at
194°F (90°C).
TB1-7,
TB1-8
(ST2)
Safety shut down
Shuts unit down
in under 6
seconds.
Configurable for
NC or NO
contacts.
TERMINAL
DESCRIPTION
REMARKS
TB1-9,
TB1-10
(IF1)
Chilled/hot water
circuit freeze
protection logic
If the terminals
are jumped, the
WFC-S unit will
use its internal
freeze protection
logic to turn on
pumps when the
fluid circuit is
sensed to be
approaching
freezing.
TB1-11,
TB1-12
(IF2)
Cooling water
circuit freeze
protection logic
TB3-7,
TB3-8
(CHSTN)
"Disabled"
feedback relay
Dry contact, 24v,
60va max load.
TB3-17,
TB3-18
(AL)
Alarm
Figure 2 – Controls Wiring Diagram