Installation
SO-SVN037A-EN 21
4. Connect the Symbio 800 controller to the 1A2 power
supply using the length of 4-conductor cable provided:
a. Connect each of the 4 individual wires on one end of the
cable to the correct terminal of the removable J5
terminal plug on the 1A2 power supply.
b. Route the other end of the cable inside of the cabinet
over to the Symbio 800 controller and connect each of
the 4 individual wires to the correct terminals on the
controller.
Notes:
• R. Red wire for 24 Volts direct current
• Bk. Black wire for ground
• Bl. Blue wire for IPC+ connection
• Gr. Gray wire for IPC-connection
5. Secure all cables in the wire channel on the display arm
with cable ties:
There are 2 factory-drilled holes provided in the wire
channel to aid in neatly securing the cables with cable ties
as is recommended.
Important: Wire protection may be required at both ends of
the wire channel and at the door hinge opening
on the control panel enclosure due to the
potential presence of sharp edges that could
abrade or cut the wires.
6. Use cable ties to clean up and secure wiring runs inside of
the control panel enclosure.
Solid State Oil Heater Relay
Installation
Note: This procedure does not apply to new chillers
operating with R514A refrigerant. Chillers with R514A
refrigerant have solid-state relay for heater control
installed and configured by the factory.
Relay RLY02909 is provided for upgrading chillers with R-123
refrigerant. This relay will operate with a 120V 15mA signal, yet
it will safely and quickly switch 120V loads up to 25 amps. The
oil heater’s amp draw is 6.25 amps at 120V, which is well within
the capacity of RLY02909.
Mounting Location
The RLY02909 must be mounted directly onto a flat steel face
of the control panel, either on a side wall of the enclosure, or
on the back-plane panel. The mounting surface acts as a heat
sink for the relay, so the relay should be securely bolted to the
mounting surface.
Note: Instructions included with the relay may require
removal of paint from the mounting surface, and the
use of a heat conductive paste between the relay and
the mounting surface. Trane’s lab testing indicates that
these additional steps are not needed for the low 6 or
7 amp draw that our heater will apply to the relay.
Securely mounting the relay to any steel surface in the
control panel is adequate for our application.
Figure 31. Wire connections from 1A2 power supply J5
to Symbio 800 controller
Figure 32. Neatly secure and protect cables in display
arm wire channel
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