WaterFurnace Versatec Ultra - Manual (Page 18)

18
VERSATEC ULTRA SERIES INSTALLATION MANUAL
General
Be sure the available power is the same voltage and phase
as that shown on the unit serial plate. Line and low voltage
wiring must be done in accordance with local codes or the
National Electric Code, whichever is applicable.
Power Connection
Connect the incoming line voltage wires to L1 and L2 of the
contactor for single-phase unit. Consult the Electrical Data
tables for correct fuse sizes.
Electrical Connections
208 Volt Operation
All Versatec Ultra Series 208/230 units are factory wired
for 230 volt operation. For 208 volt operation, the red and
blue transformer wires must be switched on terminal strip PS.
CAUTION: When installing a unit with an ECM
blower motor in 460/60/3 voltage, a neutral wire
is required to allow proper unit operation.
For Aurora Base Control, set SW2-1, FP1, on the printed
circuit board for applications using a closed loop antifreeze
solution to 15°F [-9.4°C]. On applications using an open
loop/ground water system (or closed loop no antifreeze), set
this dip switch to 30°F [-1.1°C], the factory default setting.
(Refer to the Dip Switch Field Selection table).
Freeze Detection
Aurora Base Control Box