F. Electrical Descripti ons
1. Power
a. 110/230 VAC, 50-60 Hz, 3-wire grounded NEMA 5 power
cord. GFCI source required.
2. Dip Switches (1-4)
a.
1
: pH/ORP interlock (default:
OFF
)
No ORP feed if pH is feeding (ON).
b.
2
: pH/ORP alert interlock (default:
ON
)
No ORP if pH is in alert mode (ON).
c.
3
: Acid/Base default acid (default:
OFF
)
1. Feed base chemical when pH level falls below set point.
(ON)
2. Feed acid chemical when pH above set point. (OFF)
d.
4
: Over Timer ON/OFF (default:
ON
)
Note:
Turning off the Over Timer will void any NSF Certi fi -
cati on.
Figure 3:
Dipswitches
10
M720 pH/ORP Controller Owner’s Manual