A.O. Smith 240 T-H3J Service Manual page 31

CONFIDENTIAL
240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
Ver. 1.00
10-8. Secondary heat exchanger
and 540 (T-H3) models have the "P77" mark as shown below.
240, 340 Outdoor (T-H3J, T-H3S-OS)
68C
68A
77
77
11" (282 mm)
11" (282 mm)
540 Outdoor (T-H3-OS)
68C
68A
P77
P77
11" (282 mm)
11" (282 mm)
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