SmartPlate Installation, Operation & Maintenance Manual
CHAPTER 8 – CORRECTIVE MAINTENANCE
8.9 DOUBLE-WALL HEAT EXCHANGER REPLACEMENT
The heat exchanger used in each SmartPlate Double-Wall model is removed and replaced
using the following basic procedure:
1. Turn OFF the POWER Switch on the side of the ECS/SP Control Box.
2. Slowly close all four of the Isolation Ball Valves (Figure 8-5).
3. Connect a hose to the Strainer on the Boiler Water side of the piping assembly (Figure 8-
6). Open the valve on the Strainer and drain the boiler water from the unit. It will be
necessary to loosen a Victaulic coupling by the heat exchanger to allow air into the pipe
during draining.
4. Next, connect a hose the Drain Valve on the DHW Side of the piping assembly. Open the
Relief Valve to allow air into the pipe during draining.
5. After the boiler water and domestic water have been drained from the unit, close the Relief
Valve opened in step 4 and proceed to step 6 to remove the installed heat exchanger.
6. Using a ratchet wrench with an extension and a 3/4” deep socket, remove, the four (4)
Victaulic couplings (Figure 8-19). Two (2) couplings are located on the Domestic Water
Side and two (2) are located on the Boiler Water Side.
7. Next, remove the two (2) bolts securing the front "L" brackets on the heat exchanger to the
heat exchanger mount (Figure 8-18).
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