Taco Electronic Solutions iWorx ZXU1, Installation Manual

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iWorx® ZXU1
502-007, Effective: May 30, 2013 15
© 2013 Taco Electronic Solutions, Inc.
6.Press Reset Settings Heat .
7.The Reset Settings Heat menu opens.
a.Specify Water Reset Low in degrees.
b.Specify Water Reset High in degrees.
c. Specify Boiler Pro tection in Degrees (Lowest
Return Water Temperature to return to the Boiler).
d.Press Save .
8.Press Valve (or Variable Speed Circ) Settings .
9.The Valve (or Variable Speed Circ) menu opens.
a.Specify On %. The initial valve setting when the
boiler turns on.
b.Specify Out Min in Volts for the injection device.
(commonly 2 VDC).
c. Specify Out Max in Volts for the injection device.
(commonly 10 VDC).
d.Press Save .
NOTE: DO NOT change factory Ramp up,
Ramp Down or KP/KI settings. Please review
ZXU Application Guide and Factory KP/KI Set-
ting White Paper #508-001.
10.Press NEXT 13 at bottom of screen.
11.Press Constant Circ Pump .
12.The Constant Circ Pump menu opens.
a.Select “On” or “Auto.” When set to “Auto” zone
pump comes on with demand; when set to “On”
pump remains on at all times.
b.Press Save .
13.Press Pump Exercise .