Watts AERCO Edge [ii] - Temperature Conformance

Edge [ii] Controller Operation Manual
SECTION 6 – ADVANCED SETUP
OMM-139_E • 8/25/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 161 of 196
greater than the proportional band setting, the fire rate will equal 100%.
(Range: 1°F to 120°F)
• Integral Band: Specifies the fraction of the output, due to setpoint error, to add or
subtract from the output each minute to move towards the setpoint.
(Range: 0.00 to 2.00, default = 1.00)
• Derivative Band: This value responds to the rate of change of the setpoint error. It
specifies the time that this action advances the output.
(Range: 0.00 to 2.00 min.)
• Warm-up Prop Band, Warm-up Integral Band, Warm-up Derivative Band:
These three parameters eliminate Temperature Overshoots during the “Warmup” period
of a cold ignition cycle by temporarily modifying the PID Gain parameter during warmup.
• Restore Defaults: Set to Yes to reset all parameters to the factory default.
Temperature Conformance
The Temperature Conformance screen provides access to parameters that define acceptable
temperature ranges for the unit.
1. Go to: Main Menu → Advanced Setup → Performance → Temperature Control →
Temperature Conformance.
Figure 6.6.2.2: Temperature Control: Temperature Conformance
2. This screen includes the following parameters:
• Deadband High & Deadband Low: These two settings create an “outlet
temperature” zone in which no Valve Position corrections will be attempted. This zone
operates with an outlet temperature between Active Setpoint + Deadband High and
Active Setpoint – Deadband Low. (Range: 0 to 25°F for both)
• Max Delta-T: Sets the maximum allowable difference between inlet and outlet water
temperature (T). If the unit reaches this limit, the fire rate will reduce to stay within the
limit. The unit will shut down if it goes 20° above this limit. (Range: 20°F to 120°F)