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Part number GL-E223-ADOC 0311
This manual must only be used by a qualiﬁed heating installer/service technician. BEFORE installing, read all instruc-
tions in this manual and all other information shipped with the water heater. Perform steps in the order given. Failure
to comply could result in severe personal injury, death or substantial property damage.
Indirect-Fired Water Heaters
User — Read important user safety information found on page 3, page 24 and page 25. Installation and service should
only be performed by a qualiﬁed service technician. Retain this manual for future reference.