SmartPlate Installation, Operation & Maintenance Manual
CHAPTER 8
– CORRECTIVE MAINTENANCE
OMM-0069_0H
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HEAT EXCHANGER CLEANING
Instructions
TABLE 8-1. Cleaning Solution Required For Heat Exchanger De-Scaling
SmartPlate Model
Heat Exchanger
Volume (gallons)
Cleaning Solution
Required (Gallons)
Single-Wall Heat Exchangers
SP23
1.7
0.9
SP33
2.4
1.2
SP45
3.4
1.7
SP69
5.2
2.6
SP150
11.3
5.7
Double-Wall Heat Exchangers
SPDW23
2.0
1.0
SPDW32
2.8
1.4
SPDW42
3.7
1.9
SPDW61
6.0
3.0
SPDW113
10.2
5.1
6. Drain at least half of the heat exchanger volume shown in the above Table for the
SmartPlate model being de-scaled.
7. While making sure that the Drain Valve is tightly closed, pour the correct amount of
cleaning solution into the Air Vent opening in the Mixing Box.
8. Add water as needed until the Mixing Box is full.
9.
Replace the 1” NPT Air Vent.
10. Set the Control Box POWER Switch to the
ON
position and ensure that the Recirculation
Pump is operating.
11. Allow the cleaning solution to circulate through the heat exchanger and piping for 1 to 3
hours, depending on the amount of scale deposit that is inside the heat exchanger. Since
the amount of scaling will be hard to estimate, it should be based on the time in service
and water hardness.
12. Upon completion of the previous step, turn the POWER Switch on the Control Box to
OFF
to stop the Recirculation Pump.
13.
Remove the 1” NPT Air Vent and open the unit’s Drain Valve.
14. Flush with fresh water for at least 3 minutes.
15. Next, close the Drain Valve and fill with fresh water.
16.
Apply new thermal sealant (Loctite 565 or equiv. NSF61 approved) to the threads of the 1”
NPT Air Vent and install it in the Mixing Box.
17. Open the four Isolation Ball Valves on the unit.
18. Turn the Control Box POWER Switch to
ON
to restart the unit and place it back in service
using the start-up instructions in Chapter 5.
