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10
Start-UpOperation
MultipleSystemsWithMultiple
Evaporators (RequiresASmart
Controller)
• Check all wiring connections to be sure
they are correct and tight.
• On the condensing units
- Check setting of time delay relay.
It should be set at 1 minute
(the second marker).
- Check the low pressure switch
setting on freezer units. It must be set
to 0 psig cut-out, 10 psig cut-in to
allow positive start and operation,
especially in cold ambient. This
can be changed to a higher value in
warmer climates. On cooler units,
the low pressure switch has a xed
setting and cannot be adjusted.
• Turn power on.
S S
S
M
CU
S S
S
M
CU
S S
S
M
CU
M S
S
S
CU
SMART
CONTROLLER
SYSTEM 1
SYSTEM 2 SYSTEM 3
SYSTEM 4
M = Master Evaporator S = Slave Evaporator CU = Condensing Unit
MULTIPLESYSTEMCONNECTION
(See Smart Controller instruction manual for more details)
• On the MASTER evaporator
- DO NOT REMOVE the room sensor
from any evaporator
• On the SLAVE evaporators. All Beacon II
boards are shipped with the factory
default as a “MASTER” evaporator.
- Each SLAVE evaporator must be
changed to identify it as a SLAVE.
Use the “PROGRAMREVIEW”
button to scroll until “SLA” appears,
then use the “SELECT” knob to
select “YES” then press “ENTER.”
• Use the Beacon II Smart Controller to
set system parameters. See Beacon
II Smart Controller installation
instructions for more details.