6. Locate the TB1 connection on the PCB and attach the external
pump wire and solenoid valve assembly to this connector.
7. Locate the 10-switch set of dipswitches on the front panel and
verify that DIP SW2 is ON for EXTERNAL recirculation.
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TB1
ON
1
2
3
4
5
6
7
15
ON
8
9
10
1
2
1-OFF
2-ON
3-OFF