SmartPlate Installation, Operation & Maintenance Manual
CHAPTER 6
– SCHEDULED MAINTENANCE
OMM-0069_0H
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6.3 PLATE PACK LEAKAGE CHECKS (DOUBLE-WALL MODELS
ONLY)
For SmartPlate Double-Wall Water Heater models, check the Plate Pack for leaks as follows:
PLATE PACK LEAKAGE CHECKS
Instructions
1. Remove the splash guard to access the Plate Pack (see Figure 5-1).
2. Check for leakage between the Plate Pack and Frame [see Figure 6-2 (A)].
a) If there is evidence of leakage, use a felt-tip marker to mark the area where the
leakage appears to be coming from.
b) Refer to Chapter 8, sections 8.7 and 8.8 to correct the cause of the leakage.
3. Check for leakage between plates to the outside [see Figure 6-2 (B)]
a) If there is evidence of leakage, mark the area with a felt tip marker on the two plates
next to the leakage.
b) Refer to Chapter 8, section 8.7 and 8.8 to correct the cause of the leakage.
4. If there is no evidence of leakage, replace the splash guard on the Plate Pack and return
the unit to service use.
(A) LEAKAGE BETWEEN
PLATE PACK & FRAME
(B) LEAKAGE BETWEEN
PLATES TO OUTSIDE
Figure 6-2. Double-Wall Heat Exchanger Leakage Checks - Splash Guard
Removed
6.4 OVER-TEMP SWITCH CHECK
Once every 3 months, check the Over-Temp Switch located in the ECS/SP Control Box as
follows:
OVER-TEMP SWITCH CHECK Instructions
1. Refer to Chapter 4, section 4.2.4 and lower the Over-Temp setting to approximately 5°F
below the present setpoint temperature shown in the lower display of the Temperature
Controller.
