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percent load for the network and pressure exceeds the unload pressure setting, machines will be
removed from operation, preventing the entire network from running at a low capacity when not
required.
2.3 Delcos Protocol
The Delcos protocol is the native protocol for Gardner Denver machines using the GD Pilot, GD Pilot
TS, GD Pilot XTC, Delcos Pro, Delcos XL, and Delcos XXL controllers. If you are connecting to other
Gardner Denver compressors with one of these controllers, this is the protocol that should be used.
It is also the protocol t
o select if you are using a Gardner Denver Connect 12™ system controller.
The Delcos protocol can sequence up to 4 compressors. One of the compressors must be
configured as the master, with up to 3 slaves connected, as shown above in
While using Delcos protocol,
all the slave machines run off the master machine’s delivery pressure
sensor. The master machine can be either fixed speed or variable speed, but all slave machines
must be the same type for the system to function properly.
2.4 ES+ Protocol
The ES+ protocol is the native protocol for Gardner Denver machines using the Auto Sentry ES+
Controllers. Only fixed speed machines may be sequenced using the ES+ protocol.
The ES+ protocol was designed to optimize systems of machines with turn valve and inlet valve
modulation so that air requirements are met and machines are not run when they are not required.
In ES+ mode, the system will automatically rotate the lead of the system, and will vary the amount
of modulation across the machines in the system to save energy.
The ES+ protocol is the best choice if you are installing into a system of existing machines with
ES+ controllers. The protocol will function most efficiently if all machines in the network are
relatively similar in flow capacity.
Summary of Contents for Governor
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