Watts AERCO Benchmark BMK5000 - Page 46

Benchmark 750-6000 with Edge [i]: Install-Startup Manual
SECTION 2 – INSTALLATION
OMM-144_B • GF-217 • 5/25/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 46 of 62
Sequencing Isolation Valve Installation Instructions
Figure 2-15: Sequencing Isolation Valve Installed
2. Find the grey cable inside the unit’s enclosure with the unused Molex connector with a cap
containing a jumper wire inserted in it (the jumper wire allows units that do not have a
sequencing isolation valve to operate normally). The other end is connected to the I/O board
and to a power supply.
Figure 2-16: Sequencing Isolation Valve Molex Connector and Jumper Wire
Isolation Valve Harness
Wire #
Color
Signal
1236
Black
24V Common
1237
Red
24V Hot
1238
White
Valve analog input
1239
Green
Valve analog feedback
1240
Black
Delayed interlock
1241
Black
3. Remove and dispose of the cap with jumper wire attached.
4. Plug the Molex connector into the sequencing isolation valve’s connector.
5. When the Sequencing Isolation Valve is used, the Controller’s Auxiliary Delay setting must
be set to 120 seconds. Go to Main Menu → Advanced Setup → Ancillary Device →
Interlocks and set the Auxiliary Delay setting to 120.
HOT WATER
OUTLET
AERCO
SEQUENCING
ISOLATION
VALVE
MOLEX CONNECTOR
JUMPER
CAP