Instruction Manual

Benchmark 750/1000 Boiler Installation, Operation & Maintenance Manual
CHAPTER 2 – INSTALLATION
Page 36 of 192 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0082_0J
05/21/2014 Ph.: 800-526-0288 GF-130
Installing Sequencing Isolation Valve – Continued
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 isolation valve to operate normally). Find the free end
of this cable inside the unit’s enclosure.
Figure 2-14: Sequencing Isolation Valve Installed
3. Remove the jumper wire from the Molex connector and then plug it into the sequencing
isolation valve’s connector.