Service manual

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Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.9
advance in any condition.
Force Unload:
• When this value is reached, the capacity slide posi-
tion will decrease until the variable reading is below
this value.
High Motor Amps:
• Motor current values for stop load and force unload.
High Discharge Pressure:
• Discharge pressure value for stop load and force
unload.
Low Suction Pressure:
• Suction pressure values for stop load and force unload
High Discharge Superheat:
• Discharge temperature superheat values for stop
load and force unload. This is only used for Cool
Compression.
Capacity Slide Triggered Outputs
The Vission 20/20 offers two digital outputs that can
be triggered at a specifi ed capacity slide position. By
default, the outputs are preselected for economizer
and hot gas bypass. However, these preselected out-
puts are customizable by the operator, see Figure 6-9.
Compressor Control Screen - Misc. 2 (Economizer & Hot
Gas Bypass Control).
Slide Valve Setpoint:
• Operator editable labels for the each output. Only
Economizer Port 2 Label is non-editable.
Slide %:
• Indicates the capacity slide position where the digital
output is triggered.
State Below Setpoint:
• Defi nes the state of the digital output when the slide
Section 6 • Compressor Control
Figure 6-9. Compressor Control Screen - Misc. 2 (Economizer & Hot Gas Bypass Control)