AERCO BMK 1500-2000 - Manual (Page 32)

Benchmark 1500 - 2000 Boilers
CHAPTER 2 – INSTALLATION
Page 32 of 188 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0097_0D
Ph.: 800-526-0288
GF-142
1. Install the sequencing valve in the boiler’s hot water outlet pipe.
Figure 2-13: Sequencing Valve Installed
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.
Figure 2-14: Sequencing Valve Installed
3. Remove the jumper wire from the Molex connector and then plug it into the sequencing
valve’s connector.
HOT WATER
OUTLET
SEQUENCING
VALVE