25Figure 7 – Cascaded SystemNOTES:1. This drawing is meant to show system piping concept only.Installer is responsible for all equipment & detailing required by local codes.2. The minimum pipe size for connecting a SuperStor Ultra Indirect Water Heater is 1-inch.3. The minimum pipe size for connecting the heater is 1.25-inch4. Circulators are shown with isolation flanges and integral check valves. The alternative is standard flanges with full port ball valvesand a separate flow check valve. Purge valves can be used with the circulator flanges as an alternative.5. The anti-scald mixing valve is recommended if the DHW temperature is set above the factory setting of 119°F.6. Install a minimum of 12 diameters of straight pipe upstream of all circulators.7. Winterization: When winterizing, put a drain valve on both the supply and return between the union and the shut-off connection.
