A.O. Smith BFM 80 - Manual (Page 13)

13
IM D -0 05 9
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