CleaverBrooks ADAC 1000, Руководство по эксплуатации

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Chapter 3 — Commissioning
Part No. 750-386 3-7
Other selections for dual tank systems are:
Makeup Water Valves
• 2 Valves Maximum per Tank
• 3 Valves Maximum per System
To provide PID controlled makeup water to maintain tank level.
Reverse acting selection available.
Direct Acting: 4mA = valve closed; 20mA = valve fully opened
Reverse Acting: 4mA = valve fully opened; 20mA = valve closed
VFD Bypass
• Available on both boiler feed and transfer pumps
• Allows the pump to run if VFD inactive
• Additional hardware required
3.5-System Configuration Screen 2 - Single Tank
When finished on Configuration Screen 1, press <Next>. The
following items are configured on Configuration Screen 2:
Steam PRV
• Provides PID control to maintain DA tank pressure
• If selected, Overflow Valve Control not available.
• Reverse Acting selection available.
Note: The Steam PRV Valve option requires a steam space pressure transmitter
and PRV with a 4-20 mA positioner.
Overflow Valve
• Linear Analog Overflow Valve Control.
• If selected, PRV Valve Control not available.
Chemical Feed
• Discrete “Pump Running” Output Signal to Chemical Feed System.
Figure 3-7 System Config 2