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6. Attach the harness plug from the S-BMS/
Air Handler switch (black, white, and red)
as described in Table 2.
7. Check all wiring and reattach the front
cover.
8. Reconnect power.
9. Run testing. Refer to pages 10 through 12
for Air Handler, and pages 13 and 14 for S
-BMS.
Figure 22
PC Board Wiring for
the above
application example.
OPU Installation Instructions
Optional LWCO
Thermostat
Figure 23
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Table 2: Domestic Priority Configuration
Switch
Required Leads/Wires
Configuration
Generic Air
White/Black
Handler
Rinnai Hydronic
Red/Black
Furnace
OPU
External Pump
Connection 1
T/T 1
Connection
Function
Normally Closed
Normally Open
Purge Station
To OPU
Switch
9
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