User Manual

RECON Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 6 – MAINTENANCE
Page 88 of 178 AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 OMM-0103_0A
PRI: 10/28/2014 Phone: [phone] GF-147
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Figure 6-7: Heat Exchanger Head Configuration
6.7.1 Anode Block Replacement
If your inspection of the unit’s anode blocks reveal that they have shrunk by more than 40%
(original dimensions are 7 1/4" X 4”), refer to Figure 6-8 and complete the instructions below to
replace the Anode Replacement Kit (part number 24430).
Anode Block Replacement
1. Cut a doughnut shaped piece of cardboard that will fit snugly inside the heat exchanger shell
and around the combustion chamber head and fit it in place above the heat exchanger tubes.
This will act as a shield to prevent any hardware or debris from dropping into the chamber
during installation.
2. Referring to Figure 6-8, remove the four (4) 1/4–20 hex head seal bolts holding the anode
blocks to the anode mounting bracket, and then remove both old anode blocks.
3. Position the four (4) ‘O’ rings (P/N 88019) in the circular recesses around the threaded holes
in the new anode blocks (P/N 44174). The ‘O’ rings keep water from entering the threaded
holes, preventing them from corroding, which would shorten the anode’s life.
4. Fasten one anode block to the mounting bracket with two (2) 1/4–20 hex head seal bolts (P/N
54108) and fully tighten them. Note that these are specialized bolts with built-in ‘O’ rings – DO
NOT substitute off-the-shelf bolts of the same size. DO NOT over-tighten these bolts.
5. Repeat the previous step to attach the second anode block to the mounting bracket.
6. Remove any hardware or debris that may have fallen on the cardboard shield installed in step
1 and then remove the shield from the chamber.
5/8-11 X 3-3/4” STUD
5/8-11 HEX NUT
UPPER HEAD
SHELL FLANGE
HEAT EXCHANGER
SHELL
UPPER HEAD LINER
(P/N 123077)
HEAD RELEASE
GASKET
(P/N GP-18556)
HEAD GASKET
(P/N GP-18532)
WASHER
LIFTING RING
WASHER
5/8-11 HEX NUT