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Benchmark 5000-6000 Boiler Installation & Startup Manual
SECTION 2: INSTALLATION
Sequencing Isolation Valve Installation Instructions
1. Install the sequencing isolation valve in the boiler's hot water outlet pipe (Figure 2-18).
SEQUENCING
ISOLATION VALVE
HOT WATER
OUTLET
Figure 2-18: Sequencing Isolation Valve Installed
2. Find the unused black cable, coiled inside the unit's enclosure. One end is connected to
the DELAYED INTERLOCK IN terminals in the I/O board, while the other end contains a
Molex connector with a cap containing a jumper wire inserted in it (this jumper wire allows
units that do not have a sequencing isolation valve to operate normally).
3. Remove the cap (with jumper wire attached) from the Molex connector and dispose of it.
CAP
JUMPER
Figure 2-19: Sequencing Isolation Valve Molex Connector and Jumper Wire
4. Plug the Molex connector into the sequencing isolation valve's connector.
OMM-0123_E • GF-207 • 12/17/2019
MOLEX CONNECTOR
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Page 35 of 95
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