Aerco BENCHMARK 2500DF User Manual page 32

Benchmark 2500DF-3000DF Installation, Operation & Maintenance Manual
1. Install the sequencing valve in the boiler's hot water outlet pipe.
SEQUENCING
VALVE
HOT WATER
OUTLET
2. The boiler's shell harness has one unused cable. One end of this cable is connected to
the DELAYED INTERLOCK IN terminals in the I/O board (see Figure 2-14) while the other
end contains a Molex connector with a jumper wire inserted in it (this jumper wire allows
units that do not have a sequencing valve to operate normally). Find the free end of this
cable inside the unit's enclosure.
3. Remove the jumper wire from the Molex connector and then plug it into the sequencing
valve's connector.
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05/21/2014
CHAPTER 2 – INSTALLATION
Figure 2-13: Sequencing Valve Installed
Figure 2-14: Sequencing Valve Installed
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
OMM-0099_0A
GF-145