AERCO SmartPlate User Manual
Page 86
SmartPlate Installation, Operation & Maintenance Manual
CHAPTER 8 – CORRECTIVE MAINTENANCE
Page 86 of 138
AERCO International, Inc.
100 Oritani Dr. Blauvelt, NY 10913
OMM-0069_0E
PRI: 11/26/2013
Phone: 800-526-0288
SP-100
4. After all Control Box cables have been disconnected, remove the four mounting screws
securing the bottom of the Control Box to the mounting bracket. Completely remove the
Control Box from the SmartPlate Water Heater.
5. Control Box replacement is accomplished by reversing the previous steps.
8.15 TEMPERATURE CONTROLLER REPLACEMENT
The Temperature Controller is located on the recessed panel behind the Control Box door as
shown in Figure 4-4. Removal and replacement is accomplished as follows:
1. Switch power off and open the Control Box door to access the Temperature Controller.
2. The Temperature Controller is installed in a sleeve as shown in Figure 8-26. To unplug
and remove the Controller from its sleeve, simply pry the latching ears outward and pull
the Controller out of the panel.
3. To install a replacement Temperature Controller, simply slide it into the front panel sleeve
until the latching ears click into place. Following replacement, switch power on adjust the
setpoint temperature to the required value using the Adjustment procedures in Chapter 4.
4. Close and secure Control Box front door.
Figure 8-26. Temperature Controller Installation
8.16 OVER-TEMPERATURE SWITCH AND TEMPERATURE INDICATORS
The Over-Temperature Switch and Temperature Indicators are actually identical devices,
however they perform different functions. As the name implies, the Over-Temperature Switch,
performs a switching function and generates an alarm when the preset temperature limit is
exceeded. However, the Temperature Indicators are Indicator-Only devices and are not factory
wired to perform any switching functions. The locations of the Over-Temperature Switch and
Temperature Indicator are shown in Figure 4-4. Removal and replacement for each device are
performed using the following identical steps: