Watts AERCO Edge [ii] - Appendix A: Indoor;Outdoor Reset Ratio

Edge [ii] Controller Operation Manual
Appendix A: Indoor/Outdoor Reset Ratio
OMM-139_E • 8/25/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 193 of 196
Appendix A: Indoor/Outdoor Reset Ratio
Point 1:
OD Air Temp = 60˚
Min Water Temp = 100˚
Point 2:
OD Air Temp = -10˚
Max Water Temp = 185˚
High Limit:
HL (Water Temp) = 1950˚
Warm Weather Shutdown:
WWS = 70˚
Outdoor Reset Ratio Set Point
Descending Outdoor Temperature
Water
Setpoint
Temperature
Point 1
High Limit
Point 2
Example:
Outdoor = 30
Leads to Water SP = 136.4