Instruction manual

3.5.5 Connect the solenoid-valve
Connect the gas-ballast boost solenoid-valve (Figure 4, item 6) to your control equipment so that
the valve closes when the DP180 is shut down. Use a suitably rated fused electrical supply (refer
to Section 2).
If the solenoid-valve is left open after the DP180 is shutdown, the pressure in your vacuum
system could rise to the pressure of your nitrogen supply; see Section 3.9.3.
DP180 Dry Vacuum Pump 13
1. Pump-motor terminal-box
2. 2-way terminal-block
3. Thermal snap-switch
4. To the motor starter overload-control loop
Figure 9 - Thermal snap-switch connections