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STT40 / STT70
Assembly instructions 8-3
8.3. Electrical Connection
The electrical connection of the dryer and the hopper heaters may
only be done by Sterling service staff or by qualified staff
authorized by Sterling.
Other persons are not permitted to perform any electrical
connection.
Observe the rules of the state and local electricity board.
The main power switch must be freely accessible.
Ground the equipment against electrostatic charging.
The serial tag lists voltage, phase, and amp draw information:
Line voltage must be within plus or minus ten percent (±10%)
of the voltage listed on the serial tag, or damage may occur.
Phase imbalance must be less than two percent (2%).
Connect main power to the dryer at the disconnect or terminals in
the lower position of the control enclosure.
Install a fused disconnect with a lockout feature in the power
main leading to the dryer.
) On a regular basis, make sure that none of the electrical or screw
connections become loose.
Ensure that the main power switch is at the “0" position before
carrying out any electrical connection.
The operating voltage is
STT40: 230/1/60
STT70: 480/3/60.
Special voltages can be supplied on request.
The connected loads* are
STT40 max. 1.1 kW,
STT70 max. 2.0 kW.
*If hopper heaters are installed, the value of each hopper heater must be added to these
connected loads (STT40: max. 1.5 kW, STT70: max. 3.0 kW).
The fuse protection must have
STT40 16 A,
STT70 16 A.