7. Using a ratchet wrench with an extension and a 3/4” deep socket, loosen, but do not
remove, the four (4) Victaulic couplings (Figure 8-3). Two (2) couplings are located on the
Domestic Water Side (Figure 8-3) and two (2) are located on the Boiler Water Side.
8. At the rear of the Water Heater, place a wooden block, or other suitable support, under the
Brazed Plate heat exchanger to provide support while removing the mounting bolts in the
following steps.
9. For SmartPlate model SP150, remove the two support brackets at the rear of the heat
exchanger.
10. Use a ratchet with a 9/16” socket through the hand holes in the sides of the heat
exchanger mounting bracket and a 9/16” wrench on the outside to remove the four (4)
bolts, washers and nuts secure the heat exchanger to the Support Frame.
WARNING!
THE SINGLE-WALL HEAT EXCHANGER CAN WEIGH UP TO 300 POUNDS,
DEPENDING ON THE SMARTPLATE MODEL. THEREFORE, USE EXTREME CARE
WHEN REMOVING IT FROM THE MOUNTING BRACKET.
11. Carefully pull the heat exchanger away from the mounting bracket. It may be necessary to
jiggle it to separate the grooved pipes from the Victaulic couplings.
12. To replace the heat exchanger with a new assembly, simply reverse the previous steps.
Support the replacement heat exchanger and ensure it is properly aligned when installing
the bolts squarely in the holes of the Support Frame. Tighten the bolts and all four Victaulic
couplings.
Figure 8-3. Domestic Water Side – Partial View
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