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IMD-0059
Depending on the water demand pattern (e.g., small
amounts frequently), it may be necessary to circulate the
water in the water heater to prevent temperature
stratification. Therefore, we recommend that a
circulation system is installed in the event of such
demand patterns (see figure 8). Kits are available from
A.O. Smith or our distributors.
Figure 8 - Connection diagram including destratification
circulation system
1) Pump (type: Grundfos
UP 20-15 N150, or similar)
2) Non-return valve
3) Gate valve
4) Drain valve
5) Gas valve
A) Cold Water
B) Hot Water
C) Return circulation pipe
D) Gas supply