Benchmark 2500 - 3000 Boilers
CHAPTER 2 – INSTALLATION
Page
32
of
204
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, NY 10913
OMM-0094_0E
03/20/2014
Ph.: 800-526-0288
GF-137
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
